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|
- dnl
- dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
- dnl
- dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
- dnl end of configure. This lets tested variables be reassigned, and the
- dnl conditional will depend on the final state of the variable. For a simple
- dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
- dnl
- m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
- AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
- m4_divert_text([glibcxx_diversion],dnl
- AM_CONDITIONAL([$1],[$2])
- )dnl
- ])dnl
- AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
- dnl
- dnl Check to see what architecture and operating system we are compiling
- dnl for. Also, if architecture- or OS-specific flags are required for
- dnl compilation, pick them up here.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_HOST], [
- . $glibcxx_srcdir/configure.host
- AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
- AC_MSG_NOTICE([OS config directory is $os_include_dir])
- ])
- dnl
- dnl Initialize the rest of the library configury. At this point we have
- dnl variables like $host.
- dnl
- dnl Sets:
- dnl SUBDIRS
- dnl Substs:
- dnl glibcxx_builddir (absolute path)
- dnl glibcxx_srcdir (absolute path)
- dnl toplevel_builddir (absolute path)
- dnl toplevel_srcdir (absolute path)
- dnl with_cross_host
- dnl with_newlib
- dnl with_target_subdir
- dnl plus
- dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
- dnl - default settings for all AM_CONFITIONAL test variables
- dnl - lots of tools, like CC and CXX
- dnl
- AC_DEFUN([GLIBCXX_CONFIGURE], [
- # Keep these sync'd with the list in Makefile.am. The first provides an
- # expandable list at autoconf time; the second provides an expandable list
- # (i.e., shell variable) at configure time.
- m4_define([glibcxx_SUBDIRS],[include libsupc++ src src/c++98 src/c++11 src/c++17 src/c++20 src/filesystem src/libbacktrace doc po testsuite python])
- SUBDIRS='glibcxx_SUBDIRS'
- # These need to be absolute paths, yet at the same time need to
- # canonicalize only relative paths, because then amd will not unmount
- # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
- glibcxx_builddir=`${PWDCMD-pwd}`
- case $srcdir in
- [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
- *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
- esac
- toplevel_builddir=${glibcxx_builddir}/..
- toplevel_srcdir=${glibcxx_srcdir}/..
- AC_SUBST(glibcxx_builddir)
- AC_SUBST(glibcxx_srcdir)
- AC_SUBST(toplevel_builddir)
- AC_SUBST(toplevel_srcdir)
- # We use these options to decide which functions to include. They are
- # set from the top level.
- AC_ARG_WITH([target-subdir],
- AC_HELP_STRING([--with-target-subdir=SUBDIR],
- [configuring in a subdirectory]))
- AC_ARG_WITH([cross-host],
- AC_HELP_STRING([--with-cross-host=HOST],
- [configuring with a cross compiler]))
- AC_ARG_WITH([newlib],
- AC_HELP_STRING([--with-newlib],
- [assume newlib as a system C library]))
- # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
- # available). Uncomment the next line to force a particular method.
- AC_PROG_LN_S
- #LN_S='cp -p'
- AC_CHECK_TOOL(AS, as)
- AC_CHECK_TOOL(AR, ar)
- AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
- AM_MAINTAINER_MODE
- # Set up safe default values for all subsequent AM_CONDITIONAL tests
- # which are themselves conditionally expanded.
- ## (Right now, this only matters for enable_wchar_t, but nothing prevents
- ## other macros from doing the same. This should be automated.) -pme
- # Check for C library flavor since GNU/Linux platforms use different
- # configuration directories depending on the C library in use.
- AC_EGREP_CPP([_using_uclibc], [
- #include <stdio.h>
- #if __UCLIBC__
- _using_uclibc
- #endif
- ], uclibc=yes, uclibc=no)
- AC_EGREP_CPP([_using_bionic], [
- #include <stdio.h>
- #if __BIONIC__
- _using_bionic
- #endif
- ], bionic=yes, bionic=no)
- # Find platform-specific directories containing configuration info.
- # Also possibly modify flags used elsewhere, as needed by the platform.
- GLIBCXX_CHECK_HOST
- ])
- dnl
- dnl Tests for newer compiler features, or features that are present in newer
- dnl compiler versions but not older compiler versions still in use, should
- dnl be placed here.
- dnl
- dnl Defines:
- dnl WERROR='-Werror' if requested and possible; g++'s that lack the
- dnl new inlining code or the new system_header pragma will die on -Werror.
- dnl Leave it out by default and use maint-mode to use it.
- dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
- dnl compiler supports it and the user has not requested debug mode.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
- # All these tests are for C++; save the language and the compiler flags.
- # The CXXFLAGS thing is suspicious, but based on similar bits previously
- # found in GLIBCXX_CONFIGURE.
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_test_CXXFLAGS="${CXXFLAGS+set}"
- ac_save_CXXFLAGS="$CXXFLAGS"
- # Check for -ffunction-sections -fdata-sections
- AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
- CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
- AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
- if test "$ac_test_CXXFLAGS" = set; then
- CXXFLAGS="$ac_save_CXXFLAGS"
- else
- # this is the suspicious part
- CXXFLAGS=''
- fi
- if test x"$ac_fdsections" = x"yes"; then
- SECTION_FLAGS='-ffunction-sections -fdata-sections'
- fi
- AC_MSG_RESULT($ac_fdsections)
- AC_LANG_RESTORE
- AC_SUBST(SECTION_FLAGS)
- ])
- dnl
- dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
- dnl the native linker is in use, all variables will be defined to something
- dnl safe (like an empty string).
- dnl
- dnl Defines:
- dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
- dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
- dnl LD (as a side effect of testing)
- dnl Sets:
- dnl with_gnu_ld
- dnl glibcxx_ld_is_gold (set to "no" or "yes")
- dnl glibcxx_ld_is_mold (set to "no" or "yes")
- dnl glibcxx_gnu_ld_version (possibly)
- dnl
- dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
- dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
- # If we're not using GNU ld, then there's no point in even trying these
- # tests. Check for that first. We should have already tested for gld
- # by now (in libtool), but require it now just to be safe...
- test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
- test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
- AC_REQUIRE([AC_PROG_LD])
- AC_REQUIRE([AC_PROG_AWK])
- # The name set by libtool depends on the version of libtool. Shame on us
- # for depending on an impl detail, but c'est la vie. Older versions used
- # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
- # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
- # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
- # set (hence we're using an older libtool), then set it.
- if test x${with_gnu_ld+set} != xset; then
- if test x${ac_cv_prog_gnu_ld+set} != xset; then
- # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
- with_gnu_ld=no
- else
- with_gnu_ld=$ac_cv_prog_gnu_ld
- fi
- fi
- # Start by getting the version number. I think the libtool test already
- # does some of this, but throws away the result.
- glibcxx_ld_is_gold=no
- glibcxx_ld_is_mold=no
- if test x"$with_gnu_ld" = x"yes"; then
- AC_MSG_CHECKING([for ld version])
- changequote(,)
- if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
- glibcxx_ld_is_gold=yes
- elif $LD --version 2>/dev/null | grep 'mold' >/dev/null 2>&1; then
- glibcxx_ld_is_mold=yes
- fi
- ldver=`$LD --version 2>/dev/null |
- sed -e 's/[. ][0-9]\{8\}$//;s/.* \([^ ]\{1,\}\)$/\1/; q'`
- changequote([,])
- glibcxx_gnu_ld_version=`echo $ldver | \
- $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
- AC_MSG_RESULT($glibcxx_gnu_ld_version)
- fi
- # Set --gc-sections.
- glibcxx_have_gc_sections=no
- if test "$glibcxx_ld_is_gold" = "yes" || test "$glibcxx_ld_is_mold" = "yes" ; then
- if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
- glibcxx_have_gc_sections=yes
- fi
- else
- glibcxx_gcsections_min_ld=21602
- if test x"$with_gnu_ld" = x"yes" &&
- test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
- glibcxx_have_gc_sections=yes
- fi
- fi
- if test "$glibcxx_have_gc_sections" = "yes"; then
- # Sufficiently young GNU ld it is! Joy and bunny rabbits!
- # NB: This flag only works reliably after 2.16.1. Configure tests
- # for this are difficult, so hard wire a value that should work.
- ac_test_CFLAGS="${CFLAGS+set}"
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS='-Wl,--gc-sections'
- # Check for -Wl,--gc-sections
- AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
- AC_TRY_LINK([ int one(void) { return 1; }
- int two(void) { return 2; }
- ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
- if test "$ac_gcsections" = "yes"; then
- rm -f conftest.c
- touch conftest.c
- if $CC -c conftest.c; then
- if $LD --gc-sections -o conftest conftest.o 2>&1 | \
- grep "Warning: gc-sections option ignored" > /dev/null; then
- ac_gcsections=no
- fi
- fi
- rm -f conftest.c conftest.o conftest
- fi
- if test "$ac_gcsections" = "yes"; then
- SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
- fi
- AC_MSG_RESULT($ac_gcsections)
- if test "$ac_test_CFLAGS" = set; then
- CFLAGS="$ac_save_CFLAGS"
- else
- # this is the suspicious part
- CFLAGS=''
- fi
- fi
- # Set -z,relro.
- # Note this is only for shared objects.
- ac_ld_relro=no
- if test x"$with_gnu_ld" = x"yes"; then
- # cygwin and mingw uses PE, which has no ELF relro support,
- # multi target ld may confuse configure machinery
- case "$host" in
- *-*-cygwin*)
- ;;
- *-*-mingw*)
- ;;
- *)
- AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
- cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
- if test -n "$cxx_z_relo"; then
- OPT_LDFLAGS="-Wl,-z,relro"
- ac_ld_relro=yes
- fi
- AC_MSG_RESULT($ac_ld_relro)
- esac
- fi
- # Set linker optimization flags.
- if test x"$with_gnu_ld" = x"yes"; then
- OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
- fi
- AC_SUBST(SECTION_LDFLAGS)
- AC_SUBST(OPT_LDFLAGS)
- ])
- dnl
- dnl Check for headers for, and arguments to, the setrlimit() function.
- dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
- dnl
- dnl Defines:
- dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
- dnl various HAVE_LIMIT_* for individual limit names
- dnl
- AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
- AC_MSG_CHECKING([for RLIMIT_$1])
- AC_TRY_COMPILE(
- [#include <unistd.h>
- #include <sys/time.h>
- #include <sys/resource.h>
- ],
- [ int f = RLIMIT_$1 ; ],
- [glibcxx_mresult=1], [glibcxx_mresult=0])
- AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
- [Only used in build directory testsuite_hooks.h.])
- if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
- AC_MSG_RESULT($res)
- ])
- AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- setrlimit_have_headers=yes
- AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
- [],
- [setrlimit_have_headers=no])
- # If don't have the headers, then we can't run the tests now, and we
- # won't be seeing any of these during testsuite compilation.
- if test $setrlimit_have_headers = yes; then
- # Can't do these in a loop, else the resulting syntax is wrong.
- GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
- GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
- GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
- GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
- GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
- # Check for rlimit, setrlimit.
- AC_CACHE_CHECK([for testsuite resource limits support],
- glibcxx_cv_setrlimit, [
- AC_TRY_COMPILE(
- [#include <unistd.h>
- #include <sys/time.h>
- #include <sys/resource.h>
- ],
- [struct rlimit r;
- setrlimit(0, &r);],
- [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
- ])
- if test $glibcxx_cv_setrlimit = yes; then
- AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
- [Define if using setrlimit to set resource limits during
- "make check"])
- fi
- fi
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
- dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- AC_MSG_CHECKING([for S_ISREG or S_IFREG])
- AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <sys/stat.h>],
- [struct stat buffer;
- fstat(0, &buffer);
- S_ISREG(buffer.st_mode);],
- [glibcxx_cv_S_ISREG=yes],
- [glibcxx_cv_S_ISREG=no])
- ])
- AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <sys/stat.h>],
- [struct stat buffer;
- fstat(0, &buffer);
- S_IFREG & buffer.st_mode;],
- [glibcxx_cv_S_IFREG=yes],
- [glibcxx_cv_S_IFREG=no])
- ])
- res=no
- if test $glibcxx_cv_S_ISREG = yes; then
- AC_DEFINE(HAVE_S_ISREG, 1,
- [Define if S_ISREG is available in <sys/stat.h>.])
- res=S_ISREG
- elif test $glibcxx_cv_S_IFREG = yes; then
- AC_DEFINE(HAVE_S_IFREG, 1,
- [Define if S_IFREG is available in <sys/stat.h>.])
- res=S_IFREG
- fi
- AC_MSG_RESULT($res)
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_POLL], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- AC_CACHE_CHECK([for poll], glibcxx_cv_POLL, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <poll.h>],
- [struct pollfd pfd[1];
- pfd[0].events = POLLIN;
- poll(pfd, 1, 0);],
- [glibcxx_cv_POLL=yes],
- [glibcxx_cv_POLL=no])
- ])
- if test $glibcxx_cv_POLL = yes; then
- AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
- fi
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- AC_CACHE_CHECK([for writev], glibcxx_cv_WRITEV, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <sys/uio.h>],
- [struct iovec iov[2];
- writev(0, iov, 0);],
- [glibcxx_cv_WRITEV=yes],
- [glibcxx_cv_WRITEV=no])
- ])
- if test $glibcxx_cv_WRITEV = yes; then
- AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
- fi
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check whether LFS support is available.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_LFS], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- AC_CACHE_CHECK([for LFS support], glibcxx_cv_LFS, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <unistd.h>
- #include <stdio.h>
- #include <sys/stat.h>
- ],
- [FILE* fp;
- fopen64("t", "w");
- fseeko64(fp, 0, SEEK_CUR);
- ftello64(fp);
- lseek64(1, 0, SEEK_CUR);
- struct stat64 buf;
- fstat64(1, &buf);],
- [glibcxx_cv_LFS=yes],
- [glibcxx_cv_LFS=no])
- ])
- if test $glibcxx_cv_LFS = yes; then
- AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
- fi
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check whether the old Copy-On-Write basic_string should allocate a new
- dnl empty representation for every default-constructed basic_string. Without
- dnl this option, COW strings share a single empty rep in static storage,
- dnl but this only works if the linker can guarantee the static storage has
- dnl a unique definition in the process. It also doesn't work if basic_string
- dnl objects are stored in shared memory (see PR libstdc++/16612).
- dnl When fully dynamic strings are enabled, the static storage is not used
- dnl and a new empty string with reference-count == 1 is allocated each time.
- dnl Enabling this changes the libstdc++.so ABI.
- dnl
- dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1
- dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0
- dnl otherwise the macro is not defined.
- dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
- dnl Where DEFAULT is either `yes' or `no'.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
- GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory], [permit yes|no])
- if test $enable_fully_dynamic_string = yes; then
- enable_fully_dynamic_string_def=1
- else
- enable_fully_dynamic_string_def=0
- fi
- AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}],
- [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults])
- ])
- dnl
- dnl Does any necessary configuration of the testsuite directory. Generates
- dnl the testsuite_hooks.h header.
- dnl
- dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
- dnl
- dnl Sets:
- dnl enable_abi_check
- dnl GLIBCXX_TEST_WCHAR_T
- dnl GLIBCXX_TEST_THREAD
- dnl Substs:
- dnl baseline_dir
- dnl baseline_subdir_switch
- dnl
- AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
- # Do checks for resource limit functions.
- GLIBCXX_CHECK_SETRLIMIT
- if $GLIBCXX_IS_NATIVE ; then
- # Look for setenv, so that extended locale tests can be performed.
- GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
- fi
- if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
- test $enable_symvers != no; then
- case "$host" in
- *-*-cygwin*)
- enable_abi_check=no ;;
- *)
- enable_abi_check=yes ;;
- esac
- else
- # Only build this as native, since automake does not understand
- # CXX_FOR_BUILD.
- enable_abi_check=no
- fi
- # Export file names for ABI checking.
- baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}"
- AC_SUBST(baseline_dir)
- baseline_subdir_switch="$abi_baseline_subdir_switch"
- AC_SUBST(baseline_subdir_switch)
- ])
- dnl
- dnl Does any necessary configuration for docbook in the docs directory.
- dnl
- dnl XSLTPROC must be set before this
- dnl
- dnl Sets:
- dnl glibcxx_stylesheets
- dnl Substs:
- dnl XSL_STYLE_DIR
- dnl
- AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [
- glibcxx_docbook_url=http://docbook.sourceforge.net/release/xsl-ns/current/
- AC_MSG_CHECKING([for local stylesheet directory])
- glibcxx_local_stylesheets=no
- if test x${XMLCATALOG} = xyes && xsl_style_dir=`xmlcatalog "" $glibcxx_docbook_url 2>/dev/null`
- then
- XSL_STYLE_DIR=`echo $xsl_style_dir | sed -n 's;^file://;;p'`
- glibcxx_local_stylesheets=yes
- else
- for dir in \
- /usr/share/sgml/docbook/xsl-ns-stylesheets \
- /usr/share/xml/docbook/stylesheet/docbook-xsl-ns \
- /usr/share/xml/docbook/stylesheet/nwalsh5/current \
- /usr/share/xml/docbook/stylesheet/nwalsh/current
- do
- if test -d $dir; then
- glibcxx_local_stylesheets=yes
- XSL_STYLE_DIR=$dir
- break
- fi
- done
- fi
- AC_MSG_RESULT($glibcxx_local_stylesheets)
- if test x"$glibcxx_local_stylesheets" = x"yes"; then
- AC_SUBST(XSL_STYLE_DIR)
- AC_MSG_NOTICE($XSL_STYLE_DIR)
- AC_MSG_CHECKING([for docbook stylesheets for documentation creation])
- glibcxx_stylesheets=no
- if test x${XMLCATALOG} = xno || xmlcatalog "" $glibcxx_docbook_url/xhtml/docbook.xsl >/dev/null 2>&1; then
- if test x${XSLTPROC} = xyes && echo '<title/>' | xsltproc --noout --nonet --xinclude $glibcxx_docbook_url/xhtml/docbook.xsl - 2>/dev/null; then
- glibcxx_stylesheets=yes
- fi
- fi
- AC_MSG_RESULT($glibcxx_stylesheets)
- else
- glibcxx_stylesheets=no
- fi
- # Check for epub3 dependencies.
- AC_MSG_CHECKING([for epub3 stylesheets for documentation creation])
- glibcxx_epub_stylesheets=no
- if test x"$glibcxx_local_stylesheets" = x"yes"; then
- if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then
- glibcxx_epub_stylesheets=yes
- fi
- fi
- AC_MSG_RESULT($glibcxx_epub_stylesheets)
- AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes")
- ])
- dnl
- dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
- dnl
- dnl Substs:
- dnl GLIBCXX_INCLUDES
- dnl TOPLEVEL_INCLUDES
- dnl
- AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
- # Used for every C++ compile we perform.
- GLIBCXX_INCLUDES="\
- -I$glibcxx_builddir/include/$host_alias \
- -I$glibcxx_builddir/include \
- -I$glibcxx_srcdir/libsupc++"
- # For Canadian crosses, pick this up too.
- if test $CANADIAN = yes; then
- GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
- fi
- # Stuff in the actual top level. Currently only used by libsupc++ to
- # get unwind* headers from the libgcc dir.
- #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include'
- TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc'
- # Now, export this to all the little Makefiles....
- AC_SUBST(GLIBCXX_INCLUDES)
- AC_SUBST(TOPLEVEL_INCLUDES)
- ])
- dnl
- dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
- dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
- dnl
- dnl Substs:
- dnl OPTIMIZE_CXXFLAGS
- dnl WARN_FLAGS
- dnl
- AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
- # Optimization flags that are probably a good idea for thrill-seekers. Just
- # uncomment the lines below and make, everything else is ready to go...
- # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
- # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
- AC_SUBST(OPTIMIZE_CXXFLAGS)
- WARN_FLAGS="-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2"
- AC_SUBST(WARN_FLAGS)
- ])
- dnl
- dnl All installation directory information is determined here.
- dnl
- dnl Substs:
- dnl gxx_install_dir
- dnl glibcxx_prefixdir
- dnl glibcxx_toolexecdir
- dnl glibcxx_toolexeclibdir
- dnl
- dnl Assumes cross_compiling bits already done, and with_cross_host in
- dnl particular.
- dnl
- dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
- dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
- AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
- glibcxx_toolexecdir=no
- glibcxx_toolexeclibdir=no
- glibcxx_prefixdir=$prefix
- AC_MSG_CHECKING([for gxx-include-dir])
- AC_ARG_WITH([gxx-include-dir],
- AC_HELP_STRING([--with-gxx-include-dir=DIR],
- [installation directory for include files]),
- [case "$withval" in
- yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
- no) gxx_include_dir=no ;;
- *) gxx_include_dir=$withval ;;
- esac],
- [gxx_include_dir=no])
- AC_MSG_RESULT($gxx_include_dir)
- AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
- AC_ARG_ENABLE([version-specific-runtime-libs],
- AC_HELP_STRING([--enable-version-specific-runtime-libs],
- [Specify that runtime libraries should be installed in a compiler-specific directory]),
- [case "$enableval" in
- yes) version_specific_libs=yes ;;
- no) version_specific_libs=no ;;
- *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
- esac],
- [version_specific_libs=no])
- AC_MSG_RESULT($version_specific_libs)
- GCC_WITH_TOOLEXECLIBDIR
- # Default case for install directory for include files.
- if test $version_specific_libs = no && test $gxx_include_dir = no; then
- gxx_include_dir='include/c++/${gcc_version}'
- if test -n "$with_cross_host" &&
- test x"$with_cross_host" != x"no"; then
- gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
- else
- gxx_include_dir='${prefix}/'"$gxx_include_dir"
- fi
- fi
- # Version-specific runtime libs processing.
- if test $version_specific_libs = yes; then
- # Need the gcc compiler version to know where to install libraries
- # and header files if --enable-version-specific-runtime-libs option
- # is selected. FIXME: these variables are misnamed, there are
- # no executables installed in _toolexecdir or _toolexeclibdir.
- if test x"$gxx_include_dir" = x"no"; then
- gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
- fi
- glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
- glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
- fi
- # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
- # Install a library built with a cross compiler in tooldir, not libdir.
- if test x"$glibcxx_toolexecdir" = x"no"; then
- if test -n "$with_cross_host" &&
- test x"$with_cross_host" != x"no"; then
- glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
- case ${with_toolexeclibdir} in
- no)
- glibcxx_toolexeclibdir='${toolexecdir}/lib'
- ;;
- *)
- glibcxx_toolexeclibdir=${with_toolexeclibdir}
- ;;
- esac
- else
- glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
- glibcxx_toolexeclibdir='${libdir}'
- fi
- multi_os_directory=`$CXX -print-multi-os-directory`
- case $multi_os_directory in
- .) ;; # Avoid trailing /.
- *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
- esac
- fi
- AC_MSG_CHECKING([for install location])
- AC_MSG_RESULT($gxx_include_dir)
- AC_SUBST(glibcxx_prefixdir)
- AC_SUBST(gxx_include_dir)
- AC_SUBST(glibcxx_toolexecdir)
- AC_SUBST(glibcxx_toolexeclibdir)
- ])
- dnl
- dnl GLIBCXX_ENABLE
- dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
- dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
- dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
- dnl
- dnl See manual/appendix_porting.html#appendix.porting.build_hacking for
- dnl documentation.
- dnl
- m4_define([GLIBCXX_ENABLE],[dnl
- m4_define([_g_switch],[--enable-$1])dnl
- m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl
- AC_ARG_ENABLE([$1],m4_dquote(_g_help),
- m4_bmatch([$5],
- [^permit ],
- [[
- case "$enableval" in
- m4_bpatsubst([$5],[permit ])) ;;
- *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
- dnl Idea for future: generate a URL pointing to
- dnl "onlinedocs/configopts.html#whatever"
- esac
- ]],
- [^$],
- [[
- case "$enableval" in
- yes|no) ;;
- *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
- esac
- ]],
- [[$5]]),
- [enable_]m4_bpatsubst([$1],-,_)[=][$2])
- m4_undefine([_g_switch])dnl
- m4_undefine([_g_help])dnl
- ])
- dnl
- dnl Check for ISO/IEC 9899:1999 "C99" support.
- dnl
- dnl --enable-c99 defines _GLIBCXX_USE_C99
- dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
- dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
- dnl Where DEFAULT is either `yes' or `no'.
- dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_C99], [
- GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
- if test x"$enable_c99" = x"yes"; then
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- # Use -std=c++98 (instead of -std=gnu++98) because leaving __STRICT_ANSI__
- # undefined may cause fake C99 facilities, like pre-standard snprintf,
- # to be spuriously enabled.
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -std=c++98"
- ac_save_LIBS="$LIBS"
- ac_save_gcc_no_link="$gcc_no_link"
- if test x$gcc_no_link != xyes; then
- # Use -fno-exceptions to that the C driver can link these tests without
- # hitting undefined references to personality routines.
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
- # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
- gcc_no_link=yes
- ])
- fi
- # Check for the existence of <math.h> functions used if C99 is enabled.
- AC_CACHE_CHECK([for ISO C99 support in <math.h> for C++98],
- glibcxx_cv_c99_math_cxx98, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <math.h>
- volatile double d1, d2;
- volatile int i;],
- [i = fpclassify(d1);
- i = isfinite(d1);
- i = isinf(d1);
- i = isnan(d1);
- i = isnormal(d1);
- i = signbit(d1);
- i = isgreater(d1, d2);
- i = isgreaterequal(d1, d2);
- i = isless(d1, d2);
- i = islessequal(d1, d2);
- i = islessgreater(d1, d2);
- i = islessgreater(d1, d2);
- i = isunordered(d1, d2);
- ], [glibcxx_cv_c99_math_cxx98=yes], [glibcxx_cv_c99_math_cxx98=no])
- ])
- if test x"$glibcxx_cv_c99_math_cxx98" = x"yes"; then
- AC_DEFINE(_GLIBCXX98_USE_C99_MATH, 1,
- [Define if C99 functions or macros in <math.h> should be imported
- in <cmath> in namespace std for C++98.])
- fi
- # Check for the existence of <complex.h> complex math functions.
- # This is necessary even though libstdc++ uses the builtin versions
- # of these functions, because if the builtin cannot be used, a reference
- # to the library function is emitted.
- AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
- AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
- if test x"$ac_has_complex_h" = x"yes"; then
- AC_CACHE_CHECK([for ISO C99 support in <complex.h> for C++98],
- glibcxx_cv_c99_complex_cxx98, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <complex.h>
- typedef __complex__ float float_type;
- typedef __complex__ double double_type;
- typedef __complex__ long double ld_type;
- volatile float_type tmpf;
- volatile double_type tmpd;
- volatile ld_type tmpld;
- volatile float f;
- volatile double d;
- volatile long double ld;],
- [f = cabsf(tmpf);
- f = cargf(tmpf);
- tmpf = ccosf(tmpf);
- tmpf = ccoshf(tmpf);
- tmpf = cexpf(tmpf);
- tmpf = clogf(tmpf);
- tmpf = csinf(tmpf);
- tmpf = csinhf(tmpf);
- tmpf = csqrtf(tmpf);
- tmpf = ctanf(tmpf);
- tmpf = ctanhf(tmpf);
- tmpf = cpowf(tmpf, tmpf);
- tmpf = cprojf(tmpf);
- d = cabs(tmpd);
- d = carg(tmpd);
- tmpd = ccos(tmpd);
- tmpd = ccosh(tmpd);
- tmpd = cexp(tmpd);
- tmpd = clog(tmpd);
- tmpd = csin(tmpd);
- tmpd = csinh(tmpd);
- tmpd = csqrt(tmpd);
- tmpd = ctan(tmpd);
- tmpd = ctanh(tmpd);
- tmpd = cpow(tmpd, tmpd);
- tmpd = cproj(tmpd);
- ld = cabsl(tmpld);
- ld = cargl(tmpld);
- tmpld = ccosl(tmpld);
- tmpld = ccoshl(tmpld);
- tmpld = cexpl(tmpld);
- tmpld = clogl(tmpld);
- tmpld = csinl(tmpld);
- tmpld = csinhl(tmpld);
- tmpld = csqrtl(tmpld);
- tmpld = ctanl(tmpld);
- tmpld = ctanhl(tmpld);
- tmpld = cpowl(tmpld, tmpld);
- tmpld = cprojl(tmpld);
- ], [glibcxx_cv_c99_complex_cxx98=yes], [glibcxx_cv_c99_complex_cxx98=no])
- ])
- fi
- if test x"$glibcxx_cv_c99_complex_cxx98" = x"yes"; then
- AC_DEFINE(_GLIBCXX98_USE_C99_COMPLEX, 1,
- [Define if C99 functions in <complex.h> should be used in
- <complex> for C++98. Using compiler builtins for these functions
- requires corresponding C99 library functions to be present.])
- fi
- # Check for the existence in <stdio.h> of vscanf, et. al.
- AC_CACHE_CHECK([for ISO C99 support in <stdio.h> for C++98],
- glibcxx_cv_c99_stdio_cxx98, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <stdio.h>
- #include <stdarg.h>
- void foo(char* fmt, ...)
- {
- va_list args; va_start(args, fmt);
- vfscanf(stderr, "%i", args);
- vscanf("%i", args);
- vsnprintf(fmt, 0, "%i", args);
- vsscanf(fmt, "%i", args);
- snprintf(fmt, 0, "%i");
- }], [],
- [glibcxx_cv_c99_stdio_cxx98=yes], [glibcxx_cv_c99_stdio_cxx98=no])
- ])
- if test x"$glibcxx_cv_c99_stdio_cxx98" = x"yes"; then
- AC_DEFINE(_GLIBCXX98_USE_C99_STDIO, 1,
- [Define if C99 functions or macros in <stdio.h> should be imported
- in <cstdio> in namespace std for C++98.])
- fi
- # Check for the existence in <stdlib.h> of lldiv_t, et. al.
- AC_CACHE_CHECK([for ISO C99 support in <stdlib.h> for C++98],
- glibcxx_cv_c99_stdlib_cxx98, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <stdlib.h>
- volatile float f;
- volatile long double ld;
- volatile unsigned long long ll;
- lldiv_t mydivt;],
- [char* tmp;
- f = strtof("gnu", &tmp);
- ld = strtold("gnu", &tmp);
- ll = strtoll("gnu", &tmp, 10);
- ll = strtoull("gnu", &tmp, 10);
- ll = llabs(10);
- mydivt = lldiv(10,1);
- ll = mydivt.quot;
- ll = mydivt.rem;
- ll = atoll("10");
- _Exit(0);
- ], [glibcxx_cv_c99_stdlib_cxx98=yes], [glibcxx_cv_c99_stdlib_cxx98=no])
- ])
- if test x"$glibcxx_cv_c99_stdlib_cxx98" = x"yes"; then
- AC_DEFINE(_GLIBCXX98_USE_C99_STDLIB, 1,
- [Define if C99 functions or macros in <stdlib.h> should be imported
- in <cstdlib> in namespace std for C++98.])
- fi
- # Check for the existence in <wchar.h> of wcstold, etc.
- if test x"$ac_has_wchar_h" = xyes &&
- test x"$ac_has_wctype_h" = xyes; then
- AC_CACHE_CHECK([for ISO C99 support in <wchar.h> for C++98],
- glibcxx_cv_c99_wchar_cxx98, [
- AC_TRY_COMPILE([#include <wchar.h>
- namespace test
- {
- using ::wcstold;
- using ::wcstoll;
- using ::wcstoull;
- }
- ], [], [glibcxx_cv_c99_wchar_cxx98=yes], [glibcxx_cv_c99_wchar_cxx98=no])
- ])
- # Checks for wide character functions that may not be present.
- # Injection of these is wrapped with guard macros.
- # NB: only put functions here, instead of immediately above, if
- # absolutely necessary.
- AC_TRY_COMPILE([#include <wchar.h>
- namespace test { using ::vfwscanf; }], [],
- [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
- AC_TRY_COMPILE([#include <wchar.h>
- namespace test { using ::vswscanf; }], [],
- [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
- AC_TRY_COMPILE([#include <wchar.h>
- namespace test { using ::vwscanf; }], [],
- [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
- AC_TRY_COMPILE([#include <wchar.h>
- namespace test { using ::wcstof; }], [],
- [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
- AC_TRY_COMPILE([#include <wctype.h>],
- [wint_t t; int i = iswblank(t);],
- [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
- if test x"$glibcxx_cv_c99_wchar_cxx98" = x"yes"; then
- AC_DEFINE(_GLIBCXX98_USE_C99_WCHAR, 1,
- [Define if C99 functions or macros in <wchar.h> should be imported
- in <cwchar> in namespace std for C++98.])
- fi
- fi
- # Option parsed, now set things appropriately.
- if test x"$glibcxx_cv_c99_math_cxx98" = x"no" ||
- test x"$glibcxx_cv_c99_complex_cxx98" = x"no" ||
- test x"$glibcxx_cv_c99_stdio_cxx98" = x"no" ||
- test x"$glibcxx_cv_c99_stdlib_cxx98" = x"no" ||
- test x"$glibcxx_cv_c99_wchar_cxx98" = x"no"; then
- enable_c99=no;
- else
- AC_DEFINE(_GLIBCXX_USE_C99, 1,
- [Define if C99 functions or macros from <wchar.h>, <math.h>,
- <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
- fi
- gcc_no_link="$ac_save_gcc_no_link"
- LIBS="$ac_save_LIBS"
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- # Use -std=c++11 and test again for C99 library feature in C++11 mode.
- # For the reasons given above we use -std=c++11 not -std=gnu++11.
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -std=c++11"
- ac_save_LIBS="$LIBS"
- ac_save_gcc_no_link="$gcc_no_link"
- if test x$gcc_no_link != xyes; then
- # Use -fno-exceptions to that the C driver can link these tests without
- # hitting undefined references to personality routines.
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
- # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
- gcc_no_link=yes
- ])
- fi
- # Check for the existence of <math.h> functions used if C99 is enabled.
- AC_CACHE_CHECK([for ISO C99 support in <math.h> for C++11],
- glibcxx_cv_c99_math_cxx11, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <math.h>
- volatile double d1, d2;
- volatile int i;],
- [i = fpclassify(d1);
- i = isfinite(d1);
- i = isinf(d1);
- i = isnan(d1);
- i = isnormal(d1);
- i = signbit(d1);
- i = isgreater(d1, d2);
- i = isgreaterequal(d1, d2);
- i = isless(d1, d2);
- i = islessequal(d1, d2);
- i = islessgreater(d1, d2);
- i = islessgreater(d1, d2);
- i = isunordered(d1, d2);
- ], [glibcxx_cv_c99_math_cxx11=yes], [glibcxx_cv_c99_math_cxx11=no])
- ])
- if test x"$glibcxx_cv_c99_math_cxx11" = x"yes"; then
- AC_DEFINE(_GLIBCXX11_USE_C99_MATH, 1,
- [Define if C99 functions or macros in <math.h> should be imported
- in <cmath> in namespace std for C++11.])
- fi
- # Check for the existence of <complex.h> complex math functions.
- # This is necessary even though libstdc++ uses the builtin versions
- # of these functions, because if the builtin cannot be used, a reference
- # to the library function is emitted.
- AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
- AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
- if test x"$ac_has_complex_h" = x"yes"; then
- AC_CACHE_CHECK([for ISO C99 support in <complex.h> for C++11],
- glibcxx_cv_c99_complex_cxx11, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <complex.h>
- typedef __complex__ float float_type;
- typedef __complex__ double double_type;
- typedef __complex__ long double ld_type;
- volatile float_type tmpf;
- volatile double_type tmpd;
- volatile ld_type tmpld;
- volatile float f;
- volatile double d;
- volatile long double ld;],
- [f = cabsf(tmpf);
- f = cargf(tmpf);
- tmpf = ccosf(tmpf);
- tmpf = ccoshf(tmpf);
- tmpf = cexpf(tmpf);
- tmpf = clogf(tmpf);
- tmpf = csinf(tmpf);
- tmpf = csinhf(tmpf);
- tmpf = csqrtf(tmpf);
- tmpf = ctanf(tmpf);
- tmpf = ctanhf(tmpf);
- tmpf = cpowf(tmpf, tmpf);
- tmpf = cprojf(tmpf);
- d = cabs(tmpd);
- d = carg(tmpd);
- tmpd = ccos(tmpd);
- tmpd = ccosh(tmpd);
- tmpd = cexp(tmpd);
- tmpd = clog(tmpd);
- tmpd = csin(tmpd);
- tmpd = csinh(tmpd);
- tmpd = csqrt(tmpd);
- tmpd = ctan(tmpd);
- tmpd = ctanh(tmpd);
- tmpd = cpow(tmpd, tmpd);
- tmpd = cproj(tmpd);
- ld = cabsl(tmpld);
- ld = cargl(tmpld);
- tmpld = ccosl(tmpld);
- tmpld = ccoshl(tmpld);
- tmpld = cexpl(tmpld);
- tmpld = clogl(tmpld);
- tmpld = csinl(tmpld);
- tmpld = csinhl(tmpld);
- tmpld = csqrtl(tmpld);
- tmpld = ctanl(tmpld);
- tmpld = ctanhl(tmpld);
- tmpld = cpowl(tmpld, tmpld);
- tmpld = cprojl(tmpld);
- ], [glibcxx_cv_c99_complex_cxx11=yes], [glibcxx_cv_c99_complex_cxx11=no])
- ])
- fi
- if test x"$glibcxx_cv_c99_complex_cxx11" = x"yes"; then
- AC_DEFINE(_GLIBCXX11_USE_C99_COMPLEX, 1,
- [Define if C99 functions in <complex.h> should be used in
- <complex> for C++11. Using compiler builtins for these functions
- requires corresponding C99 library functions to be present.])
- fi
- # Check for the existence in <stdio.h> of vscanf, et. al.
- AC_CACHE_CHECK([for ISO C99 support in <stdio.h> for C++11],
- glibcxx_cv_c99_stdio_cxx11, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <stdio.h>
- #include <stdarg.h>
- void foo(char* fmt, ...)
- {
- va_list args; va_start(args, fmt);
- vfscanf(stderr, "%i", args);
- vscanf("%i", args);
- vsnprintf(fmt, 0, "%i", args);
- vsscanf(fmt, "%i", args);
- snprintf(fmt, 0, "%i");
- }], [],
- [glibcxx_cv_c99_stdio_cxx11=yes], [glibcxx_cv_c99_stdio_cxx11=no])
- ])
- if test x"$glibcxx_cv_c99_stdio_cxx11" = x"yes"; then
- AC_DEFINE(_GLIBCXX11_USE_C99_STDIO, 1,
- [Define if C99 functions or macros in <stdio.h> should be imported
- in <cstdio> in namespace std for C++11.])
- fi
- # Check for the existence in <stdlib.h> of lldiv_t, et. al.
- AC_CACHE_CHECK([for ISO C99 support in <stdlib.h> for C++11],
- glibcxx_cv_c99_stdlib_cxx11, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <stdlib.h>
- volatile float f;
- volatile long double ld;
- volatile unsigned long long ll;
- lldiv_t mydivt;],
- [char* tmp;
- f = strtof("gnu", &tmp);
- ld = strtold("gnu", &tmp);
- ll = strtoll("gnu", &tmp, 10);
- ll = strtoull("gnu", &tmp, 10);
- ll = llabs(10);
- mydivt = lldiv(10,1);
- ll = mydivt.quot;
- ll = mydivt.rem;
- ll = atoll("10");
- _Exit(0);
- ], [glibcxx_cv_c99_stdlib_cxx11=yes], [glibcxx_cv_c99_stdlib_cxx11=no])
- ])
- if test x"$glibcxx_cv_c99_stdlib_cxx11" = x"yes"; then
- AC_DEFINE(_GLIBCXX11_USE_C99_STDLIB, 1,
- [Define if C99 functions or macros in <stdlib.h> should be imported
- in <cstdlib> in namespace std for C++11.])
- fi
- # Check for the existence in <wchar.h> of wcstold, etc.
- if test x"$ac_has_wchar_h" = xyes &&
- test x"$ac_has_wctype_h" = xyes; then
- AC_CACHE_CHECK([for ISO C99 support in <wchar.h> for C++11],
- glibcxx_cv_c99_wchar_cxx11, [
- AC_TRY_COMPILE([#include <wchar.h>
- namespace test
- {
- using ::wcstold;
- using ::wcstoll;
- using ::wcstoull;
- }
- ], [], [glibcxx_cv_c99_wchar_cxx11=yes], [glibcxx_cv_c99_wchar_cxx11=no])
- ])
- # Checks for wide character functions that may not be present.
- # Injection of these is wrapped with guard macros.
- # NB: only put functions here, instead of immediately above, if
- # absolutely necessary.
- AC_TRY_COMPILE([#include <wchar.h>
- namespace test { using ::vfwscanf; }], [],
- [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
- AC_TRY_COMPILE([#include <wchar.h>
- namespace test { using ::vswscanf; }], [],
- [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
- AC_TRY_COMPILE([#include <wchar.h>
- namespace test { using ::vwscanf; }], [],
- [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
- AC_TRY_COMPILE([#include <wchar.h>
- namespace test { using ::wcstof; }], [],
- [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
- AC_TRY_COMPILE([#include <wctype.h>],
- [wint_t t; int i = iswblank(t);],
- [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
- if test x"$glibcxx_cv_c99_wchar_cxx11" = x"yes"; then
- AC_DEFINE(_GLIBCXX11_USE_C99_WCHAR, 1,
- [Define if C99 functions or macros in <wchar.h> should be imported
- in <cwchar> in namespace std for C++11.])
- fi
- fi
- gcc_no_link="$ac_save_gcc_no_link"
- LIBS="$ac_save_LIBS"
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- fi
- AC_MSG_CHECKING([for fully enabled ISO C99 support])
- AC_MSG_RESULT($enable_c99)
- ])
- dnl
- dnl Check for clock_gettime, nanosleep and sched_yield, used in the
- dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this]
- dnl in the C++11 standard.
- dnl
- dnl --enable-libstdcxx-time
- dnl --enable-libstdcxx-time=yes
- dnl checks for the availability of monotonic and realtime clocks,
- dnl nanosleep and sched_yield in libc.
- dnl --enable-libstdcxx-time=rt
- dnl also searches (and, if needed, links) librt. Note that this is
- dnl not always desirable because, in glibc 2.16 and earlier, for
- dnl example, in turn it triggers the linking of libpthread too,
- dnl which activates locking,
- dnl a large overhead for single-thread programs.
- dnl --enable-libstdcxx-time=no
- dnl --disable-libstdcxx-time
- dnl disables the checks completely
- dnl
- dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX
- dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test
- dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in
- dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
- GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]],
- [use KIND for check type],
- [permit yes|no|rt])
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- ac_save_LIBS="$LIBS"
- ac_has_clock_monotonic=no
- ac_has_clock_realtime=no
- ac_has_nanosleep=no
- ac_has_sched_yield=no
- if test x"$enable_libstdcxx_time" = x"auto"; then
- case "${target_os}" in
- cygwin*)
- ac_has_nanosleep=yes
- ;;
- darwin*)
- ac_has_nanosleep=yes
- ac_has_sched_yield=yes
- ;;
- # VxWorks has nanosleep as soon as the kernel is configured with
- # INCLUDE_POSIX_TIMERS, which is normally/most-often the case.
- vxworks*)
- ac_has_nanosleep=yes
- ;;
- gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
- # Don't use link test for freestanding library, in case gcc_no_link=yes
- if test x"$is_hosted" = xyes; then
- # Versions of glibc before 2.17 needed -lrt for clock_gettime.
- AC_SEARCH_LIBS(clock_gettime, [rt])
- if test x"$ac_cv_search_clock_gettime" = x"none required"; then
- ac_has_clock_monotonic=yes
- ac_has_clock_realtime=yes
- fi
- fi
- ac_has_nanosleep=yes
- ac_has_sched_yield=yes
- ;;
- freebsd*|netbsd*|dragonfly*|rtems*)
- ac_has_clock_monotonic=yes
- ac_has_clock_realtime=yes
- ac_has_nanosleep=yes
- ac_has_sched_yield=yes
- ;;
- openbsd*)
- ac_has_clock_monotonic=yes
- ac_has_clock_realtime=yes
- ac_has_nanosleep=yes
- ;;
- solaris*)
- ac_has_clock_monotonic=yes
- ac_has_clock_realtime=yes
- ac_has_nanosleep=yes
- ac_has_sched_yield=yes
- ;;
- uclinux*)
- ac_has_nanosleep=yes
- ac_has_sched_yield=yes
- esac
- elif test x"$enable_libstdcxx_time" != x"no"; then
- if test x"$enable_libstdcxx_time" = x"rt"; then
- AC_SEARCH_LIBS(clock_gettime, [rt])
- AC_SEARCH_LIBS(nanosleep, [rt])
- else
- AC_CHECK_FUNC(clock_gettime)
- AC_CHECK_FUNC(nanosleep)
- fi
- case "$ac_cv_search_clock_gettime" in
- -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
- ;;
- esac
- case "$ac_cv_search_nanosleep" in
- -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
- ;;
- esac
- AC_SEARCH_LIBS(sched_yield, [rt])
- case "$ac_cv_search_sched_yield" in
- -lrt*)
- if test x"$enable_libstdcxx_time" = x"rt"; then
- GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
- ac_has_sched_yield=yes
- fi
- ;;
- *)
- ac_has_sched_yield=yes
- ;;
- esac
- AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
- if test x"$ac_has_unistd_h" = x"yes"; then
- AC_MSG_CHECKING([for monotonic clock])
- AC_TRY_LINK(
- [#include <unistd.h>
- #include <time.h>
- ],
- [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
- timespec tp;
- #endif
- clock_gettime(CLOCK_MONOTONIC, &tp);
- ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
- AC_MSG_RESULT($ac_has_clock_monotonic)
- AC_MSG_CHECKING([for realtime clock])
- AC_TRY_LINK(
- [#include <unistd.h>
- #include <time.h>
- ],
- [#if _POSIX_TIMERS > 0
- timespec tp;
- #endif
- clock_gettime(CLOCK_REALTIME, &tp);
- ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
- AC_MSG_RESULT($ac_has_clock_realtime)
- AC_MSG_CHECKING([for nanosleep])
- AC_TRY_LINK(
- [#include <unistd.h>
- #include <time.h>
- ],
- [#if _POSIX_TIMERS > 0
- timespec tp;
- #endif
- nanosleep(&tp, 0);
- ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
- AC_MSG_RESULT($ac_has_nanosleep)
- fi
- fi
- if test x"$ac_has_clock_monotonic" != x"yes"; then
- case ${target_os} in
- linux* | uclinux*)
- AC_MSG_CHECKING([for clock_gettime syscall])
- AC_TRY_COMPILE(
- [#include <unistd.h>
- #include <time.h>
- #include <sys/syscall.h>
- ],
- [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
- timespec tp;
- #endif
- syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp);
- syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);
- ], [ac_has_clock_gettime_syscall=yes], [ac_has_clock_gettime_syscall=no])
- AC_MSG_RESULT($ac_has_clock_gettime_syscall)
- if test x"$ac_has_clock_gettime_syscall" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1,
- [Defined if clock_gettime syscall has monotonic and realtime clock support. ])
- ac_has_clock_monotonic=yes
- ac_has_clock_realtime=yes
- AC_MSG_CHECKING([for struct timespec that matches syscall])
- AC_TRY_COMPILE(
- [#include <time.h>
- #include <sys/syscall.h>
- ],
- [#ifdef SYS_clock_gettime64
- #if SYS_clock_gettime64 != SYS_clock_gettime
- // We need to use SYS_clock_gettime and libc appears to
- // also know about the SYS_clock_gettime64 syscall.
- // Check that userspace doesn't use time64 version of timespec.
- static_assert(sizeof(timespec::tv_sec) == sizeof(long),
- "struct timespec must be compatible with SYS_clock_gettime");
- #endif
- #endif
- ],
- [ac_timespec_matches_syscall=yes],
- [ac_timespec_matches_syscall=no])
- AC_MSG_RESULT($ac_timespec_matches_syscall)
- if test x"$ac_timespec_matches_syscall" = no; then
- AC_MSG_ERROR([struct timespec is not compatible with SYS_clock_gettime, please report a bug to http://gcc.gnu.org/bugzilla])
- fi
- fi;;
- esac
- fi
- if test x"$ac_has_clock_monotonic" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
- [ Defined if clock_gettime has monotonic clock support. ])
- fi
- if test x"$ac_has_clock_realtime" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
- [ Defined if clock_gettime has realtime clock support. ])
- fi
- if test x"$ac_has_sched_yield" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
- [ Defined if sched_yield is available. ])
- fi
- if test x"$ac_has_nanosleep" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
- [ Defined if nanosleep is available. ])
- else
- AC_MSG_CHECKING([for sleep])
- AC_TRY_COMPILE([#include <unistd.h>],
- [sleep(1)],
- [ac_has_sleep=yes],[ac_has_sleep=no])
- if test x"$ac_has_sleep" = x"yes"; then
- AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.])
- fi
- AC_MSG_RESULT($ac_has_sleep)
- AC_MSG_CHECKING([for usleep])
- AC_TRY_COMPILE([#include <unistd.h>],
- [sleep(1);
- usleep(100);],
- [ac_has_usleep=yes],[ac_has_usleep=no])
- if test x"$ac_has_usleep" = x"yes"; then
- AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.])
- fi
- AC_MSG_RESULT($ac_has_usleep)
- fi
- if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then
- ac_no_sleep=yes
- AC_MSG_CHECKING([for Sleep])
- AC_TRY_COMPILE([#include <windows.h>],
- [Sleep(1)],
- [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no])
- if test x"$ac_has_win32_sleep" = x"yes"; then
- AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.])
- ac_no_sleep=no
- fi
- AC_MSG_RESULT($ac_has_win32_sleep)
- fi
- if test x"$ac_no_sleep" = x"yes"; then
- AC_DEFINE(_GLIBCXX_NO_SLEEP,1, [Defined if no way to sleep is available.])
- fi
- AC_SUBST(GLIBCXX_LIBS)
- CXXFLAGS="$ac_save_CXXFLAGS"
- LIBS="$ac_save_LIBS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check for gettimeofday, used in the implementation of 20.11.7
- dnl [time.clock] in the C++11 standard.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
- AC_MSG_CHECKING([for gettimeofday])
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- ac_has_gettimeofday=no;
- AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
- if test x"$ac_has_sys_time_h" = x"yes"; then
- AC_MSG_CHECKING([for gettimeofday])
- GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
- [timeval tv; gettimeofday(&tv, 0);],
- [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
- AC_MSG_RESULT($ac_has_gettimeofday)
- fi
- if test x"$ac_has_gettimeofday" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
- [ Defined if gettimeofday is available. ])
- fi
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
- dnl facilities in Chapter 8, "C compatibility".
- dnl
- AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
- # undefined and fake C99 facilities may be spuriously enabled.
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -std=c++98"
- # Check for the existence of <complex.h> complex math functions used
- # by tr1/complex.
- AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
- ac_c99_complex_tr1=no;
- if test x"$ac_has_complex_h" = x"yes"; then
- AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
- AC_TRY_COMPILE([#include <complex.h>],
- [typedef __complex__ float float_type; float_type tmpf;
- cacosf(tmpf);
- casinf(tmpf);
- catanf(tmpf);
- cacoshf(tmpf);
- casinhf(tmpf);
- catanhf(tmpf);
- typedef __complex__ double double_type; double_type tmpd;
- cacos(tmpd);
- casin(tmpd);
- catan(tmpd);
- cacosh(tmpd);
- casinh(tmpd);
- catanh(tmpd);
- typedef __complex__ long double ld_type; ld_type tmpld;
- cacosl(tmpld);
- casinl(tmpld);
- catanl(tmpld);
- cacoshl(tmpld);
- casinhl(tmpld);
- catanhl(tmpld);
- ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
- fi
- AC_MSG_RESULT($ac_c99_complex_tr1)
- if test x"$ac_c99_complex_tr1" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
- [Define if C99 functions in <complex.h> should be used in
- <tr1/complex>. Using compiler builtins for these functions
- requires corresponding C99 library functions to be present.])
- fi
- # Check for the existence of <ctype.h> functions.
- AC_CACHE_CHECK([for ISO C99 support to TR1 in <ctype.h>],
- glibcxx_cv_c99_ctype_tr1, [
- AC_TRY_COMPILE([#include <ctype.h>],
- [int ch;
- int ret;
- ret = isblank(ch);
- ],[glibcxx_cv_c99_ctype_tr1=yes],
- [glibcxx_cv_c99_ctype_tr1=no])
- ])
- if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
- [Define if C99 functions in <ctype.h> should be imported in
- <tr1/cctype> in namespace std::tr1.])
- fi
- # Check for the existence of <fenv.h> functions.
- AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
- ac_c99_fenv_tr1=no;
- if test x"$ac_has_fenv_h" = x"yes"; then
- AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
- AC_TRY_COMPILE([#include <fenv.h>],
- [int except, mode;
- fexcept_t* pflag;
- fenv_t* penv;
- int ret;
- ret = feclearexcept(except);
- ret = fegetexceptflag(pflag, except);
- ret = feraiseexcept(except);
- ret = fesetexceptflag(pflag, except);
- ret = fetestexcept(except);
- ret = fegetround();
- ret = fesetround(mode);
- ret = fegetenv(penv);
- ret = feholdexcept(penv);
- ret = fesetenv(penv);
- ret = feupdateenv(penv);
- ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
- AC_MSG_RESULT($ac_c99_fenv_tr1)
- fi
- if test x"$ac_c99_fenv_tr1" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
- [Define if C99 functions in <fenv.h> should be imported in
- <tr1/cfenv> in namespace std::tr1.])
- fi
- # Check for the existence of <stdint.h> types.
- AC_CACHE_CHECK([for ISO C99 support to TR1 in <stdint.h>],
- glibcxx_cv_c99_stdint_tr1, [
- AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
- #define __STDC_CONSTANT_MACROS
- #include <stdint.h>],
- [typedef int8_t my_int8_t;
- my_int8_t i8 = INT8_MIN;
- i8 = INT8_MAX;
- typedef int16_t my_int16_t;
- my_int16_t i16 = INT16_MIN;
- i16 = INT16_MAX;
- typedef int32_t my_int32_t;
- my_int32_t i32 = INT32_MIN;
- i32 = INT32_MAX;
- typedef int64_t my_int64_t;
- my_int64_t i64 = INT64_MIN;
- i64 = INT64_MAX;
- typedef int_fast8_t my_int_fast8_t;
- my_int_fast8_t if8 = INT_FAST8_MIN;
- if8 = INT_FAST8_MAX;
- typedef int_fast16_t my_int_fast16_t;
- my_int_fast16_t if16 = INT_FAST16_MIN;
- if16 = INT_FAST16_MAX;
- typedef int_fast32_t my_int_fast32_t;
- my_int_fast32_t if32 = INT_FAST32_MIN;
- if32 = INT_FAST32_MAX;
- typedef int_fast64_t my_int_fast64_t;
- my_int_fast64_t if64 = INT_FAST64_MIN;
- if64 = INT_FAST64_MAX;
- typedef int_least8_t my_int_least8_t;
- my_int_least8_t il8 = INT_LEAST8_MIN;
- il8 = INT_LEAST8_MAX;
- typedef int_least16_t my_int_least16_t;
- my_int_least16_t il16 = INT_LEAST16_MIN;
- il16 = INT_LEAST16_MAX;
- typedef int_least32_t my_int_least32_t;
- my_int_least32_t il32 = INT_LEAST32_MIN;
- il32 = INT_LEAST32_MAX;
- typedef int_least64_t my_int_least64_t;
- my_int_least64_t il64 = INT_LEAST64_MIN;
- il64 = INT_LEAST64_MAX;
- typedef intmax_t my_intmax_t;
- my_intmax_t im = INTMAX_MAX;
- im = INTMAX_MIN;
- typedef intptr_t my_intptr_t;
- my_intptr_t ip = INTPTR_MAX;
- ip = INTPTR_MIN;
- typedef uint8_t my_uint8_t;
- my_uint8_t ui8 = UINT8_MAX;
- ui8 = UINT8_MAX;
- typedef uint16_t my_uint16_t;
- my_uint16_t ui16 = UINT16_MAX;
- ui16 = UINT16_MAX;
- typedef uint32_t my_uint32_t;
- my_uint32_t ui32 = UINT32_MAX;
- ui32 = UINT32_MAX;
- typedef uint64_t my_uint64_t;
- my_uint64_t ui64 = UINT64_MAX;
- ui64 = UINT64_MAX;
- typedef uint_fast8_t my_uint_fast8_t;
- my_uint_fast8_t uif8 = UINT_FAST8_MAX;
- uif8 = UINT_FAST8_MAX;
- typedef uint_fast16_t my_uint_fast16_t;
- my_uint_fast16_t uif16 = UINT_FAST16_MAX;
- uif16 = UINT_FAST16_MAX;
- typedef uint_fast32_t my_uint_fast32_t;
- my_uint_fast32_t uif32 = UINT_FAST32_MAX;
- uif32 = UINT_FAST32_MAX;
- typedef uint_fast64_t my_uint_fast64_t;
- my_uint_fast64_t uif64 = UINT_FAST64_MAX;
- uif64 = UINT_FAST64_MAX;
- typedef uint_least8_t my_uint_least8_t;
- my_uint_least8_t uil8 = UINT_LEAST8_MAX;
- uil8 = UINT_LEAST8_MAX;
- typedef uint_least16_t my_uint_least16_t;
- my_uint_least16_t uil16 = UINT_LEAST16_MAX;
- uil16 = UINT_LEAST16_MAX;
- typedef uint_least32_t my_uint_least32_t;
- my_uint_least32_t uil32 = UINT_LEAST32_MAX;
- uil32 = UINT_LEAST32_MAX;
- typedef uint_least64_t my_uint_least64_t;
- my_uint_least64_t uil64 = UINT_LEAST64_MAX;
- uil64 = UINT_LEAST64_MAX;
- typedef uintmax_t my_uintmax_t;
- my_uintmax_t uim = UINTMAX_MAX;
- uim = UINTMAX_MAX;
- typedef uintptr_t my_uintptr_t;
- my_uintptr_t uip = UINTPTR_MAX;
- uip = UINTPTR_MAX;
- ],[glibcxx_cv_c99_stdint_tr1=yes],
- [glibcxx_cv_c99_stdint_tr1=no])
- ])
- if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
- [Define if C99 types in <stdint.h> should be imported in
- <tr1/cstdint> in namespace std::tr1.])
- fi
- # Check for the existence of <math.h> functions.
- AC_CACHE_CHECK([for ISO C99 support to TR1 in <math.h>],
- glibcxx_cv_c99_math_tr1, [
- AC_TRY_COMPILE([#include <math.h>],
- [typedef double_t my_double_t;
- typedef float_t my_float_t;
- acosh(0.0);
- acoshf(0.0f);
- acoshl(0.0l);
- asinh(0.0);
- asinhf(0.0f);
- asinhl(0.0l);
- atanh(0.0);
- atanhf(0.0f);
- atanhl(0.0l);
- cbrt(0.0);
- cbrtf(0.0f);
- cbrtl(0.0l);
- copysign(0.0, 0.0);
- copysignf(0.0f, 0.0f);
- copysignl(0.0l, 0.0l);
- erf(0.0);
- erff(0.0f);
- erfl(0.0l);
- erfc(0.0);
- erfcf(0.0f);
- erfcl(0.0l);
- exp2(0.0);
- exp2f(0.0f);
- exp2l(0.0l);
- expm1(0.0);
- expm1f(0.0f);
- expm1l(0.0l);
- fdim(0.0, 0.0);
- fdimf(0.0f, 0.0f);
- fdiml(0.0l, 0.0l);
- fma(0.0, 0.0, 0.0);
- fmaf(0.0f, 0.0f, 0.0f);
- fmal(0.0l, 0.0l, 0.0l);
- fmax(0.0, 0.0);
- fmaxf(0.0f, 0.0f);
- fmaxl(0.0l, 0.0l);
- fmin(0.0, 0.0);
- fminf(0.0f, 0.0f);
- fminl(0.0l, 0.0l);
- hypot(0.0, 0.0);
- hypotf(0.0f, 0.0f);
- hypotl(0.0l, 0.0l);
- ilogb(0.0);
- ilogbf(0.0f);
- ilogbl(0.0l);
- lgamma(0.0);
- lgammaf(0.0f);
- lgammal(0.0l);
- #ifndef __APPLE__ /* see below */
- llrint(0.0);
- llrintf(0.0f);
- llrintl(0.0l);
- llround(0.0);
- llroundf(0.0f);
- llroundl(0.0l);
- #endif
- log1p(0.0);
- log1pf(0.0f);
- log1pl(0.0l);
- log2(0.0);
- log2f(0.0f);
- log2l(0.0l);
- logb(0.0);
- logbf(0.0f);
- logbl(0.0l);
- lrint(0.0);
- lrintf(0.0f);
- lrintl(0.0l);
- lround(0.0);
- lroundf(0.0f);
- lroundl(0.0l);
- nan(0);
- nanf(0);
- nanl(0);
- nearbyint(0.0);
- nearbyintf(0.0f);
- nearbyintl(0.0l);
- nextafter(0.0, 0.0);
- nextafterf(0.0f, 0.0f);
- nextafterl(0.0l, 0.0l);
- nexttoward(0.0, 0.0);
- nexttowardf(0.0f, 0.0f);
- nexttowardl(0.0l, 0.0l);
- remainder(0.0, 0.0);
- remainderf(0.0f, 0.0f);
- remainderl(0.0l, 0.0l);
- remquo(0.0, 0.0, 0);
- remquof(0.0f, 0.0f, 0);
- remquol(0.0l, 0.0l, 0);
- rint(0.0);
- rintf(0.0f);
- rintl(0.0l);
- round(0.0);
- roundf(0.0f);
- roundl(0.0l);
- scalbln(0.0, 0l);
- scalblnf(0.0f, 0l);
- scalblnl(0.0l, 0l);
- scalbn(0.0, 0);
- scalbnf(0.0f, 0);
- scalbnl(0.0l, 0);
- tgamma(0.0);
- tgammaf(0.0f);
- tgammal(0.0l);
- trunc(0.0);
- truncf(0.0f);
- truncl(0.0l);
- ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
- ])
- if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
- [Define if C99 functions or macros in <math.h> should be imported
- in <tr1/cmath> in namespace std::tr1.])
- case "${target_os}" in
- darwin*)
- AC_CACHE_CHECK([for ISO C99 rounding functions in <math.h>],
- glibcxx_cv_c99_math_llround, [
- AC_TRY_COMPILE([#include <math.h>],
- [llrint(0.0);
- llrintf(0.0f);
- llrintl(0.0l);
- llround(0.0);
- llroundf(0.0f);
- llroundl(0.0l);
- ],
- [glibcxx_cv_c99_math_llround=yes],
- [glibcxx_cv_c99_math_llround=no])
- ])
- ;;
- esac
- if test x"$glibcxx_cv_c99_math_llround" = x"no"; then
- AC_DEFINE(_GLIBCXX_NO_C99_ROUNDING_FUNCS, 1,
- [Define if C99 llrint and llround functions are missing from <math.h>.])
- fi
- fi
- # Check for the existence of <inttypes.h> functions (NB: doesn't make
- # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
- ac_c99_inttypes_tr1=no;
- if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
- AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
- AC_TRY_COMPILE([#include <inttypes.h>],
- [intmax_t i, numer, denom, base;
- const char* s;
- char** endptr;
- intmax_t ret = imaxabs(i);
- imaxdiv_t dret = imaxdiv(numer, denom);
- ret = strtoimax(s, endptr, base);
- uintmax_t uret = strtoumax(s, endptr, base);
- ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
- AC_MSG_RESULT($ac_c99_inttypes_tr1)
- fi
- if test x"$ac_c99_inttypes_tr1" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
- [Define if C99 functions in <inttypes.h> should be imported in
- <tr1/cinttypes> in namespace std::tr1.])
- fi
- # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't
- # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
- ac_c99_inttypes_wchar_t_tr1=no;
- if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
- AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
- AC_TRY_COMPILE([#include <inttypes.h>],
- [intmax_t base;
- const wchar_t* s;
- wchar_t** endptr;
- intmax_t ret = wcstoimax(s, endptr, base);
- uintmax_t uret = wcstoumax(s, endptr, base);
- ],[ac_c99_inttypes_wchar_t_tr1=yes],
- [ac_c99_inttypes_wchar_t_tr1=no])
- AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
- fi
- if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
- [Define if wchar_t C99 functions in <inttypes.h> should be
- imported in <tr1/cinttypes> in namespace std::tr1.])
- fi
- # Check for the existence of the <stdbool.h> header.
- AC_CHECK_HEADERS(stdbool.h)
- # Check for the existence of the <stdalign.h> header.
- AC_CHECK_HEADERS(stdalign.h)
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check for uchar.h and usability.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_UCHAR_H], [
- # Test uchar.h.
- AC_CHECK_HEADERS(uchar.h, ac_has_uchar_h=yes, ac_has_uchar_h=no)
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -std=c++11"
- if test x"$ac_has_uchar_h" = x"yes"; then
- AC_MSG_CHECKING([for ISO C11 support for <uchar.h>])
- AC_TRY_COMPILE([#include <uchar.h>
- #ifdef __STDC_UTF_16__
- long i = __STDC_UTF_16__;
- #endif
- #ifdef __STDC_UTF_32__
- long j = __STDC_UTF_32__;
- #endif
- namespace test
- {
- using ::c16rtomb;
- using ::c32rtomb;
- using ::mbrtoc16;
- using ::mbrtoc32;
- }
- ],
- [], [ac_c11_uchar_cxx11=yes], [ac_c11_uchar_cxx11=no])
- AC_MSG_RESULT($ac_c11_uchar_cxx11)
- else
- ac_c11_uchar_cxx11=no
- fi
- if test x"$ac_c11_uchar_cxx11" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_C11_UCHAR_CXX11, 1,
- [Define if C11 functions in <uchar.h> should be imported into
- namespace std in <cuchar>.])
- fi
- CXXFLAGS="$CXXFLAGS -fchar8_t"
- if test x"$ac_has_uchar_h" = x"yes"; then
- AC_MSG_CHECKING([for c8rtomb and mbrtoc8 in <uchar.h> with -fchar8_t])
- AC_TRY_COMPILE([#include <uchar.h>
- namespace test
- {
- using ::c8rtomb;
- using ::mbrtoc8;
- }
- ],
- [], [ac_uchar_c8rtomb_mbrtoc8_fchar8_t=yes],
- [ac_uchar_c8rtomb_mbrtoc8_fchar8_t=no])
- else
- ac_uchar_c8rtomb_mbrtoc8_fchar8_t=no
- fi
- AC_MSG_RESULT($ac_uchar_c8rtomb_mbrtoc8_fchar8_t)
- if test x"$ac_uchar_c8rtomb_mbrtoc8_fchar8_t" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_UCHAR_C8RTOMB_MBRTOC8_FCHAR8_T, 1,
- [Define if c8rtomb and mbrtoc8 functions in <uchar.h> should be
- imported into namespace std in <cuchar> for -fchar8_t.])
- fi
- CXXFLAGS="$CXXFLAGS -std=c++20"
- if test x"$ac_has_uchar_h" = x"yes"; then
- AC_MSG_CHECKING([for c8rtomb and mbrtoc8 in <uchar.h> with -std=c++20])
- AC_TRY_COMPILE([#include <uchar.h>
- namespace test
- {
- using ::c8rtomb;
- using ::mbrtoc8;
- }
- ],
- [], [ac_uchar_c8rtomb_mbrtoc8_cxx20=yes],
- [ac_uchar_c8rtomb_mbrtoc8_cxx20=no])
- else
- ac_uchar_c8rtomb_mbrtoc8_cxx20=no
- fi
- AC_MSG_RESULT($ac_uchar_c8rtomb_mbrtoc8_cxx20)
- if test x"$ac_uchar_c8rtomb_mbrtoc8_cxx20" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_UCHAR_C8RTOMB_MBRTOC8_CXX20, 1,
- [Define if c8rtomb and mbrtoc8 functions in <uchar.h> should be
- imported into namespace std in <cuchar> for C++20.])
- fi
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check whether "/dev/random" and "/dev/urandom" are available for
- dnl class std::random_device from C++ 2011 [rand.device], and
- dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
- dnl
- AC_DEFUN([GLIBCXX_CHECK_DEV_RANDOM], [
- AC_CACHE_CHECK([for "/dev/random" and "/dev/urandom" for std::random_device],
- glibcxx_cv_dev_random, [
- if test -r /dev/random && test -r /dev/urandom; then
- ## For MSys environment the test above is detected as false-positive
- ## on mingw-targets. So disable it explicitly for them.
- case ${target_os} in
- *mingw*) glibcxx_cv_dev_random=no ;;
- *) glibcxx_cv_dev_random=yes ;;
- esac
- else
- glibcxx_cv_dev_random=no;
- fi
- ])
- if test x"$glibcxx_cv_dev_random" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_DEV_RANDOM, 1,
- [Define if /dev/random and /dev/urandom are available for
- std::random_device.])
- AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
- [Define if /dev/random and /dev/urandom are available for
- the random_device of TR1 (Chapter 5.1).])
- fi
- ])
- dnl
- dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
- dnl
- AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
- if test "$is_hosted" = yes; then
- AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
- AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
- [#include <stdio.h>],
- [AC_MSG_ERROR([computing EOF failed])])
- ])
- AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
- [Define to the value of the EOF integer constant.])
- AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
- AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
- [#include <stdio.h>],
- [AC_MSG_ERROR([computing SEEK_CUR failed])])
- ])
- AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
- [Define to the value of the SEEK_CUR integer constant.])
- AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
- AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
- [#include <stdio.h>],
- [AC_MSG_ERROR([computing SEEK_END failed])])
- ])
- AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
- [Define to the value of the SEEK_END integer constant.])
- fi
- ])
- dnl
- dnl Check whether required C++ overloads are present in <stdio.h>.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- # Use C++11 because a conforming <stdio.h> won't define gets for C++14,
- # and we don't need a declaration for C++14 anyway.
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -std=gnu++11"
- AC_CACHE_CHECK([for gets declaration], glibcxx_cv_gets, [
- AC_COMPILE_IFELSE([AC_LANG_SOURCE(
- [#include <stdio.h>
- namespace test
- {
- using ::gets;
- }
- ])],
- [glibcxx_cv_gets=yes],
- [glibcxx_cv_gets=no]
- )])
- if test $glibcxx_cv_gets = yes; then
- AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h> before C++14.])
- fi
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check whether required C++11 overloads for floating point and integral
- dnl types are present in <math.h>.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -std=c++11"
- case "$host" in
- *-*-solaris2.*)
- # Solaris 12 Build 86, Solaris 11.3 SRU 3.6, and Solaris 10 Patch
- # 11996[67]-02 introduced the C++11 <math.h> floating point overloads.
- AC_CACHE_CHECK([for C++11 <math.h> floating point overloads],
- glibcxx_cv_math11_fp_overload, [
- AC_COMPILE_IFELSE([AC_LANG_SOURCE(
- [#include <math.h>
- #undef isfinite
- namespace std {
- inline bool isfinite(float __x)
- { return __builtin_isfinite(__x); }
- }
- ])],
- [glibcxx_cv_math11_fp_overload=no],
- [glibcxx_cv_math11_fp_overload=yes]
- )])
- # autoheader cannot handle indented templates.
- AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_FP],
- [/* Define if all C++11 floating point overloads are available in <math.h>. */
- #if __cplusplus >= 201103L
- #undef __CORRECT_ISO_CPP11_MATH_H_PROTO_FP
- #endif])
- if test $glibcxx_cv_math11_fp_overload = yes; then
- AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_FP)
- fi
- # Solaris 12 Build 90, Solaris 11.3 SRU 5.6, and Solaris 10 Patch
- # 11996[67]-02 introduced the C++11 <math.h> integral type overloads.
- AC_CACHE_CHECK([for C++11 <math.h> integral type overloads],
- glibcxx_cv_math11_int_overload, [
- AC_COMPILE_IFELSE([AC_LANG_SOURCE(
- [#include <math.h>
- namespace std {
- template<typename _Tp>
- struct __is_integer;
- template<>
- struct __is_integer<int>
- {
- enum { __value = 1 };
- };
- }
- namespace __gnu_cxx {
- template<bool, typename>
- struct __enable_if;
- template<typename _Tp>
- struct __enable_if<true, _Tp>
- { typedef _Tp __type; };
- }
- namespace std {
- template<typename _Tp>
- constexpr typename __gnu_cxx::__enable_if
- <__is_integer<_Tp>::__value, double>::__type
- log2(_Tp __x)
- { return __builtin_log2(__x); }
- }
- int
- main (void)
- {
- int i = 1000;
- return std::log2(i);
- }
- ])],
- [glibcxx_cv_math11_int_overload=no],
- [glibcxx_cv_math11_int_overload=yes]
- )])
- # autoheader cannot handle indented templates.
- AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_INT],
- [/* Define if all C++11 integral type overloads are available in <math.h>. */
- #if __cplusplus >= 201103L
- #undef __CORRECT_ISO_CPP11_MATH_H_PROTO_INT
- #endif])
- if test $glibcxx_cv_math11_int_overload = yes; then
- AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_INT)
- fi
- ;;
- *)
- # If <math.h> defines the obsolete isinf(double) and isnan(double)
- # functions (instead of or as well as the C99 generic macros) then we
- # can't define std::isinf(double) and std::isnan(double) in <cmath>
- # and must use the ones from <math.h> instead.
- AC_CACHE_CHECK([for obsolete isinf function in <math.h>],
- glibcxx_cv_obsolete_isinf, [
- AC_COMPILE_IFELSE([AC_LANG_SOURCE(
- [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
- #include <math.h>
- #undef isinf
- namespace std {
- using ::isinf;
- bool isinf(float);
- bool isinf(long double);
- }
- using std::isinf;
- bool b = isinf(0.0);
- ])],
- [glibcxx_cv_obsolete_isinf=yes],
- [glibcxx_cv_obsolete_isinf=no]
- )])
- if test $glibcxx_cv_obsolete_isinf = yes; then
- AC_DEFINE(HAVE_OBSOLETE_ISINF, 1,
- [Define if <math.h> defines obsolete isinf function.])
- fi
- AC_CACHE_CHECK([for obsolete isnan function in <math.h>],
- glibcxx_cv_obsolete_isnan, [
- AC_COMPILE_IFELSE([AC_LANG_SOURCE(
- [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
- #include <math.h>
- #undef isnan
- namespace std {
- using ::isnan;
- bool isnan(float);
- bool isnan(long double);
- }
- using std::isnan;
- bool b = isnan(0.0);
- ])],
- [glibcxx_cv_obsolete_isnan=yes],
- [glibcxx_cv_obsolete_isnan=no]
- )])
- if test $glibcxx_cv_obsolete_isnan = yes; then
- AC_DEFINE(HAVE_OBSOLETE_ISNAN, 1,
- [Define if <math.h> defines obsolete isnan function.])
- fi
- ;;
- esac
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check for what type of C headers to use.
- dnl
- dnl --enable-cheaders= [does stuff].
- dnl --disable-cheaders [does not do anything, really].
- dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
- dnl Where DEFAULT is either 'c' or 'c_global' or 'c_std'.
- dnl
- dnl To use the obsolete 'c_std' headers use --enable-cheaders-obsolete as
- dnl well as --enable-cheaders=c_std, otherwise configure will fail.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
- GLIBCXX_ENABLE(cheaders-obsolete,no,,
- [allow use of obsolete "C" headers for g++])
- GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
- [construct "C" headers for g++], [permit c|c_global|c_std])
- AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
- if test $enable_cheaders = c_std ; then
- AC_MSG_WARN([the --enable-cheaders=c_std configuration is obsolete, c_global should be used instead])
- AC_MSG_WARN([if you are unable to use c_global please report a bug or inform libstdc++@gcc.gnu.org])
- if test $enable_cheaders_obsolete != yes ; then
- AC_MSG_ERROR(use --enable-cheaders-obsolete to use c_std "C" headers)
- fi
- fi
- C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
- # Allow overrides to configure.host here.
- if test $enable_cheaders = c_global; then
- c_compatibility=yes
- fi
- AC_SUBST(C_INCLUDE_DIR)
- GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
- GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
- GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
- GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
- ])
- dnl
- dnl Check for which locale library to use. The choice is mapped to
- dnl a subdirectory of config/locale.
- dnl
- dnl Default is generic.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
- GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
- [use MODEL for target locale package],
- [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
- # Deal with gettext issues. Default to not using it (=no) until we detect
- # support for it later. Let the user turn it off via --e/d, but let that
- # default to on for easier handling.
- USE_NLS=no
- AC_ARG_ENABLE(nls,
- AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
- [],
- [enable_nls=yes])
- # Either a known package, or "auto"
- if test $enable_clocale = no || test $enable_clocale = yes; then
- enable_clocale=auto
- fi
- enable_clocale_flag=$enable_clocale
- # Probe for locale model to use if none specified.
- # Default to "generic".
- if test $enable_clocale_flag = auto; then
- case ${target_os} in
- linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
- enable_clocale_flag=gnu
- ;;
- darwin*)
- enable_clocale_flag=darwin
- ;;
- vxworks*)
- enable_clocale_flag=vxworks
- ;;
- dragonfly* | freebsd*)
- enable_clocale_flag=dragonfly
- ;;
- openbsd*)
- enable_clocale_flag=newlib
- ;;
- *)
- if test x"$with_newlib" = x"yes"; then
- enable_clocale_flag=newlib
- else
- enable_clocale_flag=generic
- fi
- ;;
- esac
- fi
- # Sanity check model, and test for special functionality.
- if test $enable_clocale_flag = gnu; then
- AC_EGREP_CPP([_GLIBCXX_ok], [
- #include <features.h>
- #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
- _GLIBCXX_ok
- #endif
- ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
- # Set it to scream when it hurts.
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS="-Wimplicit-function-declaration -Werror"
- # Use strxfrm_l if available.
- AC_TRY_COMPILE([#define _GNU_SOURCE 1
- #include <string.h>
- #include <locale.h>],
- [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
- AC_DEFINE(HAVE_STRXFRM_L, 1,
- [Define if strxfrm_l is available in <string.h>.]),)
- # Use strerror_l if available.
- AC_TRY_COMPILE([#define _GNU_SOURCE 1
- #include <string.h>
- #include <locale.h>],
- [__locale_t loc; strerror_l(5, loc);],
- AC_DEFINE(HAVE_STRERROR_L, 1,
- [Define if strerror_l is available in <string.h>.]),)
- CFLAGS="$ac_save_CFLAGS"
- fi
- # Perhaps use strerror_r if available, and strerror_l isn't.
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS="-Wimplicit-function-declaration -Werror"
- AC_TRY_COMPILE([#define _GNU_SOURCE 1
- #include <string.h>
- #include <locale.h>],
- [char s[128]; strerror_r(5, s, 128);],
- AC_DEFINE(HAVE_STRERROR_R, 1,
- [Define if strerror_r is available in <string.h>.]),)
- CFLAGS="$ac_save_CFLAGS"
- # Set configure bits for specified locale package
- AC_MSG_CHECKING([for C locale to use])
- case ${enable_clocale_flag} in
- generic)
- AC_MSG_RESULT(generic)
- CLOCALE_H=config/locale/generic/c_locale.h
- CLOCALE_CC=config/locale/generic/c_locale.cc
- CCODECVT_CC=config/locale/generic/codecvt_members.cc
- CCOLLATE_CC=config/locale/generic/collate_members.cc
- CCTYPE_CC=config/locale/generic/ctype_members.cc
- CMESSAGES_H=config/locale/generic/messages_members.h
- CMESSAGES_CC=config/locale/generic/messages_members.cc
- CMONEY_CC=config/locale/generic/monetary_members.cc
- CNUMERIC_CC=config/locale/generic/numeric_members.cc
- CTIME_H=config/locale/generic/time_members.h
- CTIME_CC=config/locale/generic/time_members.cc
- CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
- ;;
- darwin)
- AC_MSG_RESULT(darwin)
- CLOCALE_H=config/locale/generic/c_locale.h
- CLOCALE_CC=config/locale/generic/c_locale.cc
- CCODECVT_CC=config/locale/generic/codecvt_members.cc
- CCOLLATE_CC=config/locale/generic/collate_members.cc
- CCTYPE_CC=config/locale/darwin/ctype_members.cc
- CMESSAGES_H=config/locale/generic/messages_members.h
- CMESSAGES_CC=config/locale/generic/messages_members.cc
- CMONEY_CC=config/locale/generic/monetary_members.cc
- CNUMERIC_CC=config/locale/generic/numeric_members.cc
- CTIME_H=config/locale/generic/time_members.h
- CTIME_CC=config/locale/generic/time_members.cc
- CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
- ;;
- vxworks)
- AC_MSG_RESULT(vxworks)
- CLOCALE_H=config/locale/generic/c_locale.h
- CLOCALE_CC=config/locale/generic/c_locale.cc
- CCODECVT_CC=config/locale/generic/codecvt_members.cc
- CCOLLATE_CC=config/locale/generic/collate_members.cc
- CCTYPE_CC=config/locale/vxworks/ctype_members.cc
- CMESSAGES_H=config/locale/generic/messages_members.h
- CMESSAGES_CC=config/locale/generic/messages_members.cc
- CMONEY_CC=config/locale/generic/monetary_members.cc
- CNUMERIC_CC=config/locale/generic/numeric_members.cc
- CTIME_H=config/locale/generic/time_members.h
- CTIME_CC=config/locale/generic/time_members.cc
- CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
- ;;
- dragonfly)
- AC_MSG_RESULT(dragonfly or freebsd)
- CLOCALE_H=config/locale/dragonfly/c_locale.h
- CLOCALE_CC=config/locale/dragonfly/c_locale.cc
- CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc
- CCOLLATE_CC=config/locale/dragonfly/collate_members.cc
- CCTYPE_CC=config/locale/dragonfly/ctype_members.cc
- CMESSAGES_H=config/locale/generic/messages_members.h
- CMESSAGES_CC=config/locale/generic/messages_members.cc
- CMONEY_CC=config/locale/dragonfly/monetary_members.cc
- CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc
- CTIME_H=config/locale/dragonfly/time_members.h
- CTIME_CC=config/locale/dragonfly/time_members.cc
- CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
- ;;
- gnu)
- AC_MSG_RESULT(gnu)
- # Declare intention to use gettext, and add support for specific
- # languages.
- # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
- ALL_LINGUAS="de fr"
- # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
- AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
- if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
- USE_NLS=yes
- fi
- # Export the build objects.
- for ling in $ALL_LINGUAS; do \
- glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
- glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
- done
- AC_SUBST(glibcxx_MOFILES)
- AC_SUBST(glibcxx_POFILES)
- CLOCALE_H=config/locale/gnu/c_locale.h
- CLOCALE_CC=config/locale/gnu/c_locale.cc
- CCODECVT_CC=config/locale/gnu/codecvt_members.cc
- CCOLLATE_CC=config/locale/gnu/collate_members.cc
- CCTYPE_CC=config/locale/gnu/ctype_members.cc
- CMESSAGES_H=config/locale/gnu/messages_members.h
- CMESSAGES_CC=config/locale/gnu/messages_members.cc
- CMONEY_CC=config/locale/gnu/monetary_members.cc
- CNUMERIC_CC=config/locale/gnu/numeric_members.cc
- CTIME_H=config/locale/gnu/time_members.h
- CTIME_CC=config/locale/gnu/time_members.cc
- CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
- ;;
- ieee_1003.1-2001)
- AC_MSG_RESULT(IEEE 1003.1)
- CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
- CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
- CCODECVT_CC=config/locale/generic/codecvt_members.cc
- CCOLLATE_CC=config/locale/generic/collate_members.cc
- CCTYPE_CC=config/locale/generic/ctype_members.cc
- CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
- CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
- CMONEY_CC=config/locale/generic/monetary_members.cc
- CNUMERIC_CC=config/locale/generic/numeric_members.cc
- CTIME_H=config/locale/generic/time_members.h
- CTIME_CC=config/locale/generic/time_members.cc
- CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
- ;;
- newlib)
- AC_MSG_RESULT(newlib)
- CLOCALE_H=config/locale/generic/c_locale.h
- CLOCALE_CC=config/locale/generic/c_locale.cc
- CCODECVT_CC=config/locale/generic/codecvt_members.cc
- CCOLLATE_CC=config/locale/generic/collate_members.cc
- CCTYPE_CC=config/locale/newlib/ctype_members.cc
- CMESSAGES_H=config/locale/generic/messages_members.h
- CMESSAGES_CC=config/locale/generic/messages_members.cc
- CMONEY_CC=config/locale/generic/monetary_members.cc
- CNUMERIC_CC=config/locale/generic/numeric_members.cc
- CTIME_H=config/locale/generic/time_members.h
- CTIME_CC=config/locale/generic/time_members.cc
- CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
- ;;
- esac
- # This is where the testsuite looks for locale catalogs, using the
- # -DLOCALEDIR define during testsuite compilation.
- glibcxx_localedir=${glibcxx_builddir}/po/share/locale
- AC_SUBST(glibcxx_localedir)
- # A standalone libintl (e.g., GNU libintl) may be in use.
- if test $USE_NLS = yes; then
- AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
- AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
- fi
- if test $USE_NLS = yes; then
- AC_DEFINE(_GLIBCXX_USE_NLS, 1,
- [Define if NLS translations are to be used.])
- fi
- AC_SUBST(USE_NLS)
- AC_SUBST(CLOCALE_H)
- AC_SUBST(CMESSAGES_H)
- AC_SUBST(CCODECVT_CC)
- AC_SUBST(CCOLLATE_CC)
- AC_SUBST(CCTYPE_CC)
- AC_SUBST(CMESSAGES_CC)
- AC_SUBST(CMONEY_CC)
- AC_SUBST(CNUMERIC_CC)
- AC_SUBST(CTIME_H)
- AC_SUBST(CTIME_CC)
- AC_SUBST(CLOCALE_CC)
- AC_SUBST(CLOCALE_INTERNAL_H)
- ])
- dnl
- dnl Check for which std::allocator base class to use. The choice is
- dnl mapped from a subdirectory of include/ext.
- dnl
- dnl Default is new.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
- AC_MSG_CHECKING([for std::allocator base class])
- GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
- [use KIND for target std::allocator base],
- [permit new|malloc|yes|no|auto])
- # If they didn't use this option switch, or if they specified --enable
- # with no specific model, we'll have to look for one. If they
- # specified --disable (???), do likewise.
- if test $enable_libstdcxx_allocator = no ||
- test $enable_libstdcxx_allocator = yes;
- then
- enable_libstdcxx_allocator=auto
- fi
- # Either a known package, or "auto". Auto implies the default choice
- # for a particular platform.
- enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
- # Probe for host-specific support if no specific model is specified.
- # Default to "new".
- if test $enable_libstdcxx_allocator_flag = auto; then
- case ${target_os} in
- linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
- enable_libstdcxx_allocator_flag=new
- ;;
- *)
- enable_libstdcxx_allocator_flag=new
- ;;
- esac
- fi
- AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
- # Set configure bits for specified locale package
- case ${enable_libstdcxx_allocator_flag} in
- malloc)
- ALLOCATOR_H=config/allocator/malloc_allocator_base.h
- ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
- ;;
- new)
- ALLOCATOR_H=config/allocator/new_allocator_base.h
- ALLOCATOR_NAME=__gnu_cxx::new_allocator
- ;;
- esac
- GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW,
- test $enable_libstdcxx_allocator_flag = new)
- AC_SUBST(ALLOCATOR_H)
- AC_SUBST(ALLOCATOR_NAME)
- ])
- dnl
- dnl Check for whether the Boost-derived checks should be turned on.
- dnl
- dnl --enable-concept-checks turns them on.
- dnl --disable-concept-checks leaves them off.
- dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
- dnl Where DEFAULT is either `yes' or `no'.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
- GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
- if test $enable_concept_checks = yes; then
- AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
- [Define to use concept checking code from the boost libraries.])
- fi
- ])
- dnl
- dnl Use extern templates.
- dnl
- dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
- dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
- dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
- dnl Where DEFAULT is `yes' or `no'.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
- GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
- AC_MSG_CHECKING([for extern template support])
- AC_MSG_RESULT([$enable_extern_template])
- GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
- ])
- dnl
- dnl Use vtable verification.
- dnl
- dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
- dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
- dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
- dnl Where DEFAULT is `yes' or `no'.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
- GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
- AC_MSG_CHECKING([for vtable verify support])
- AC_MSG_RESULT([$enable_vtable_verify])
- vtv_cygmin=no
- if test $enable_vtable_verify = yes; then
- case ${target_os} in
- cygwin*|mingw32*)
- VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
- VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
- vtv_cygmin=yes
- ;;
- darwin*)
- VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end"
- VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs"
- ;;
- solaris2*)
- VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
- VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs"
- ;;
- *)
- VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
- VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
- ;;
- esac
- VTV_PCH_CXXFLAGS="-fvtable-verify=std"
- else
- VTV_CXXFLAGS=
- VTV_PCH_CXXFLAGS=
- VTV_CXXLINKFLAGS=
- fi
- AC_SUBST(VTV_CXXFLAGS)
- AC_SUBST(VTV_PCH_CXXFLAGS)
- AC_SUBST(VTV_CXXLINKFLAGS)
- AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes)
- GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
- ])
- dnl
- dnl Check for parallel mode pre-requisites, including OpenMP support.
- dnl
- dnl + Usage: GLIBCXX_ENABLE_PARALLEL
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
- enable_parallel=no;
- # See if configured libgomp/omp.h exists. (libgomp may be in
- # noconfigdirs but not explicitly disabled.)
- if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
- enable_parallel=yes;
- else
- AC_MSG_NOTICE([target-libgomp not built])
- fi
- AC_MSG_CHECKING([for parallel mode support])
- AC_MSG_RESULT([$enable_parallel])
- ])
- dnl
- dnl Check for which I/O library to use: stdio and POSIX, or pure stdio.
- dnl
- dnl Default is stdio_posix.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
- AC_MSG_CHECKING([for underlying I/O to use])
- GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
- [use target-specific I/O package], [permit stdio|stdio_posix|stdio_pure])
- # The only available I/O model is based on stdio, via basic_file_stdio.
- # The default "stdio" is actually "stdio + POSIX" because it uses fdopen(3)
- # to get a file descriptor and then uses read(3) and write(3) with it.
- # The "stdio_pure" model doesn't use fdopen and only uses FILE* for I/O.
- case ${enable_cstdio} in
- stdio*)
- CSTDIO_H=config/io/c_io_stdio.h
- BASIC_FILE_H=config/io/basic_file_stdio.h
- BASIC_FILE_CC=config/io/basic_file_stdio.cc
- if test "x$enable_cstdio" = "xstdio_pure" ; then
- AC_MSG_RESULT([stdio (without POSIX read/write)])
- AC_DEFINE(_GLIBCXX_USE_STDIO_PURE, 1,
- [Define to restrict std::__basic_file<> to stdio APIs.])
- else
- AC_MSG_RESULT([stdio (with POSIX read/write)])
- fi
- ;;
- esac
- AC_SUBST(CSTDIO_H)
- AC_SUBST(BASIC_FILE_H)
- AC_SUBST(BASIC_FILE_CC)
- ])
- dnl
- dnl Check for "unusual" flags to pass to the compiler while building.
- dnl
- dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
- dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
- dnl --disable-cxx-flags passes nothing.
- dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
- dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
- dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
- dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
- dnl If "default flags" is an empty string, the effect is the same
- dnl as --disable or --enable=no.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
- AC_MSG_CHECKING([for extra compiler flags for building])
- GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
- [pass compiler FLAGS when building library],
- [case "x$enable_cxx_flags" in
- xno | x) enable_cxx_flags= ;;
- x-*) ;;
- *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
- esac])
- # Run through flags (either default or command-line) and set anything
- # extra (e.g., #defines) that must accompany particular g++ options.
- if test -n "$enable_cxx_flags"; then
- for f in $enable_cxx_flags; do
- case "$f" in
- -fhonor-std) ;;
- -*) ;;
- *) # and we're trying to pass /what/ exactly?
- AC_MSG_ERROR([compiler flags start with a -]) ;;
- esac
- done
- fi
- EXTRA_CXX_FLAGS="$enable_cxx_flags"
- AC_MSG_RESULT($EXTRA_CXX_FLAGS)
- AC_SUBST(EXTRA_CXX_FLAGS)
- ])
- dnl
- dnl Check to see if debugging libraries are to be built.
- dnl
- dnl --enable-libstdcxx-debug
- dnl builds a separate set of debugging libraries in addition to the
- dnl normal (shared, static) libstdc++ binaries.
- dnl
- dnl --disable-libstdcxx-debug
- dnl builds only one (non-debug) version of libstdc++.
- dnl
- dnl --enable-libstdcxx-debug-flags=FLAGS
- dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
- dnl
- dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
- dnl Where DEFAULT is either `yes' or `no'.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
- AC_MSG_CHECKING([for additional debug build])
- skip_debug_build=
- GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
- if test x$enable_libstdcxx_debug = xyes; then
- if test -f $toplevel_builddir/../stage_final \
- && test -f $toplevel_builddir/../stage_current; then
- stage_final=`cat $toplevel_builddir/../stage_final`
- stage_current=`cat $toplevel_builddir/../stage_current`
- if test x$stage_current != x$stage_final ; then
- skip_debug_build=" (skipped for bootstrap stage $stage_current)"
- enable_libstdcxx_debug=no
- fi
- fi
- fi
- AC_MSG_RESULT($enable_libstdcxx_debug$skip_debug_build)
- GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
- ])
- dnl
- dnl Check for explicit debug flags.
- dnl
- dnl --enable-libstdcxx-debug-flags='-O1'
- dnl is a general method for passing flags to be used when
- dnl building debug libraries with --enable-libstdcxx-debug.
- dnl
- dnl --disable-libstdcxx-debug-flags does nothing.
- dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
- dnl If "default flags" is an empty string, the effect is the same
- dnl as --disable or --enable=no.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
- GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
- [pass compiler FLAGS when building debug library],
- [case "x$enable_libstdcxx_debug_flags" in
- xno | x) enable_libstdcxx_debug_flags= ;;
- x-*) ;;
- *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
- esac])
- # Option parsed, now set things appropriately
- DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
- AC_SUBST(DEBUG_FLAGS)
- AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
- ])
- dnl
- dnl Check if the user only wants a freestanding library implementation.
- dnl
- dnl --disable-hosted-libstdcxx will turn off most of the library build,
- dnl installing only the headers required by [17.4.1.3] and the language
- dnl support library. More than that will be built (to keep the Makefiles
- dnl conveniently clean), but not installed.
- dnl
- dnl Sets:
- dnl is_hosted (yes/no)
- dnl
- dnl Defines:
- dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
- AC_ARG_ENABLE([hosted-libstdcxx],
- AC_HELP_STRING([--disable-hosted-libstdcxx],
- [only build freestanding C++ runtime support]),,
- [case "$host" in
- arm*-*-symbianelf*)
- enable_hosted_libstdcxx=no
- ;;
- *)
- enable_hosted_libstdcxx=yes
- ;;
- esac])
- freestanding_flags=
- if test "$enable_hosted_libstdcxx" = no; then
- AC_MSG_NOTICE([Only freestanding libraries will be built])
- is_hosted=no
- hosted_define=0
- enable_abi_check=no
- enable_libstdcxx_pch=no
- if test "x$with_headers" = xno; then
- freestanding_flags="-ffreestanding"
- fi
- else
- is_hosted=yes
- hosted_define=1
- fi
- GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
- AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
- [Define to 1 if a full hosted library is built, or 0 if freestanding.])
- FREESTANDING_FLAGS="$freestanding_flags"
- AC_SUBST(FREESTANDING_FLAGS)
- ])
- dnl
- dnl Check if the user wants a non-verbose library implementation.
- dnl
- dnl --disable-libstdcxx-verbose will turn off descriptive messages to
- dnl standard error on termination.
- dnl
- dnl Defines:
- dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
- AC_ARG_ENABLE([libstdcxx-verbose],
- AC_HELP_STRING([--disable-libstdcxx-verbose],
- [disable termination messages to standard error]),,
- [enable_libstdcxx_verbose=yes])
- if test x"$enable_libstdcxx_verbose" = xyes; then
- verbose_define=1
- else
- AC_MSG_NOTICE([verbose termination messages are disabled])
- verbose_define=0
- fi
- AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
- [Define to 1 if a verbose library is built, or 0 otherwise.])
- ])
- dnl
- dnl Check for template specializations for the 'long long' type.
- dnl The result determines only whether 'long long' I/O is enabled; things
- dnl like numeric_limits<> specializations are always available.
- dnl
- dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
- dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
- dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
- dnl Where DEFAULT is either `yes' or `no'.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
- GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
- if test $enable_long_long = yes; then
- AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
- [Define if code specialized for long long should be used.])
- fi
- AC_MSG_CHECKING([for enabled long long specializations])
- AC_MSG_RESULT([$enable_long_long])
- ])
- dnl
- dnl Check for decimal floating point.
- dnl See:
- dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
- dnl
- dnl This checks to see if the host supports decimal floating point types.
- dnl
- dnl Defines:
- dnl _GLIBCXX_USE_DECIMAL_FLOAT
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
- # Fake what AC_TRY_COMPILE does, without linking as this is
- # unnecessary for this test.
- cat > conftest.$ac_ext << EOF
- [#]line __oline__ "configure"
- int main()
- {
- _Decimal32 d1;
- _Decimal64 d2;
- _Decimal128 d3;
- return 0;
- }
- EOF
- AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
- if AC_TRY_EVAL(ac_compile); then
- AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
- [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
- enable_dfp=yes
- else
- enable_dfp=no
- fi
- AC_MSG_RESULT($enable_dfp)
- rm -f conftest*
- ])
- dnl
- dnl Check for GNU 128-bit floating point type.
- dnl
- dnl Note: also checks that the type isn't a standard types.
- dnl
- dnl Defines:
- dnl ENABLE_FLOAT128
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_FLOAT128], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- # Fake what AC_TRY_COMPILE does, without linking as this is
- # unnecessary for this test.
- cat > conftest.$ac_ext << EOF
- [#]line __oline__ "configure"
- template<typename T1, typename T2>
- struct same
- { typedef T2 type; };
- template<typename T>
- struct same<T, T>;
- int main()
- {
- typename same<double, __float128>::type f1;
- typename same<long double, __float128>::type f2;
- }
- EOF
- AC_MSG_CHECKING([for __float128])
- if AC_TRY_EVAL(ac_compile); then
- enable_float128=yes
- else
- enable_float128=no
- fi
- AC_MSG_RESULT($enable_float128)
- GLIBCXX_CONDITIONAL(ENABLE_FLOAT128, test $enable_float128 = yes)
- rm -f conftest*
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check for template specializations for the 'wchar_t' type.
- dnl
- dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
- dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
- dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
- dnl Where DEFAULT is either `yes' or `no'.
- dnl
- dnl Necessary support must also be present.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
- GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
- # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
- AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
- AC_MSG_CHECKING([for mbstate_t])
- AC_TRY_COMPILE([#include <wchar.h>],
- [mbstate_t teststate;],
- have_mbstate_t=yes, have_mbstate_t=no)
- AC_MSG_RESULT($have_mbstate_t)
- if test x"$have_mbstate_t" = xyes; then
- AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
- fi
- # Test it always, for use in GLIBCXX_ENABLE_C99, together with
- # ac_has_wchar_h.
- AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
- if test x"$enable_wchar_t" = x"yes"; then
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- if test x"$ac_has_wchar_h" = xyes &&
- test x"$ac_has_wctype_h" = xyes; then
- AC_TRY_COMPILE([#include <wchar.h>
- #include <stddef.h>
- wint_t i;
- long l = WEOF;
- long j = WCHAR_MIN;
- long k = WCHAR_MAX;
- namespace test
- {
- using ::btowc;
- using ::fgetwc;
- using ::fgetws;
- using ::fputwc;
- using ::fputws;
- using ::fwide;
- using ::fwprintf;
- using ::fwscanf;
- using ::getwc;
- using ::getwchar;
- using ::mbrlen;
- using ::mbrtowc;
- using ::mbsinit;
- using ::mbsrtowcs;
- using ::putwc;
- using ::putwchar;
- using ::swprintf;
- using ::swscanf;
- using ::ungetwc;
- using ::vfwprintf;
- using ::vswprintf;
- using ::vwprintf;
- using ::wcrtomb;
- using ::wcscat;
- using ::wcschr;
- using ::wcscmp;
- using ::wcscoll;
- using ::wcscpy;
- using ::wcscspn;
- using ::wcsftime;
- using ::wcslen;
- using ::wcsncat;
- using ::wcsncmp;
- using ::wcsncpy;
- using ::wcspbrk;
- using ::wcsrchr;
- using ::wcsrtombs;
- using ::wcsspn;
- using ::wcsstr;
- using ::wcstod;
- using ::wcstok;
- using ::wcstol;
- using ::wcstoul;
- using ::wcsxfrm;
- using ::wctob;
- using ::wmemchr;
- using ::wmemcmp;
- using ::wmemcpy;
- using ::wmemmove;
- using ::wmemset;
- using ::wprintf;
- using ::wscanf;
- }
- ],[],[], [enable_wchar_t=no])
- else
- enable_wchar_t=no
- fi
- AC_LANG_RESTORE
- fi
- if test x"$enable_wchar_t" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
- [Define if code specialized for wchar_t should be used.])
- fi
- AC_MSG_CHECKING([for enabled wchar_t specializations])
- AC_MSG_RESULT([$enable_wchar_t])
- ])
- dnl
- dnl Check to see if building and using a C++ precompiled header can be done.
- dnl
- dnl --enable-libstdcxx-pch=yes
- dnl default, this shows intent to use stdc++.h.gch If it looks like it
- dnl may work, after some light-hearted attempts to puzzle out compiler
- dnl support, flip bits on in include/Makefile.am
- dnl
- dnl --disable-libstdcxx-pch
- dnl turns off attempts to use or build stdc++.h.gch.
- dnl
- dnl Substs:
- dnl glibcxx_PCHFLAGS
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_PCH], [
- GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
- if test $enable_libstdcxx_pch = yes; then
- AC_CACHE_CHECK([for compiler with PCH support],
- [glibcxx_cv_prog_CXX_pch],
- [ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- echo '#include <math.h>' > conftest.h
- if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
- -o conftest.h.gch 1>&5 2>&1 &&
- echo '#error "pch failed"' > conftest.h &&
- echo '#include "conftest.h"' > conftest.cc &&
- $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
- then
- glibcxx_cv_prog_CXX_pch=yes
- else
- glibcxx_cv_prog_CXX_pch=no
- fi
- rm -f conftest*
- CXXFLAGS=$ac_save_CXXFLAGS
- AC_LANG_RESTORE
- ])
- enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
- fi
- AC_MSG_CHECKING([for enabled PCH])
- AC_MSG_RESULT([$enable_libstdcxx_pch])
- GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
- if test $enable_libstdcxx_pch = yes; then
- glibcxx_PCHFLAGS="-include bits/stdc++.h"
- else
- glibcxx_PCHFLAGS=""
- fi
- AC_SUBST(glibcxx_PCHFLAGS)
- ])
- dnl
- dnl Check for atomic builtins.
- dnl See:
- dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
- dnl
- dnl This checks to see if the host supports the compiler-generated
- dnl builtins for atomic operations for various integral sizes. Note, this
- dnl is intended to be an all-or-nothing switch, so all the atomic operations
- dnl that are used should be checked.
- dnl
- dnl Note:
- dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- old_CXXFLAGS="$CXXFLAGS"
- # Do link tests if possible, instead asm tests, limited to some platforms
- # see discussion in PR target/40134, PR libstdc++/40133 and the thread
- # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
- atomic_builtins_link_tests=no
- if test x$gcc_no_link != xyes; then
- # Can do link tests. Limit to some tested platforms
- case "$host" in
- *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
- atomic_builtins_link_tests=yes
- ;;
- esac
- fi
- if test x$atomic_builtins_link_tests = xyes; then
- # Do link tests.
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- AC_CACHE_CHECK([for atomic builtins for bool],
- glibcxx_cv_atomic_bool, [
- AC_TRY_LINK(
- [ ],
- [typedef bool atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- // N.B. __atomic_fetch_add is not supported for bool.
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
- ],
- [glibcxx_cv_atomic_bool=yes],
- [glibcxx_cv_atomic_bool=no])
- ])
- AC_CACHE_CHECK([for atomic builtins for short],
- glibcxx_cv_atomic_short, [
- AC_TRY_LINK(
- [ ],
- [typedef short atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
- ],
- [glibcxx_cv_atomic_short=yes],
- [glibcxx_cv_atomic_short=no])
- ])
- AC_CACHE_CHECK([for atomic builtins for int],
- glibcxx_cv_atomic_int, [
- AC_TRY_LINK(
- [ ],
- [typedef int atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
- ],
- [glibcxx_cv_atomic_int=yes],
- [glibcxx_cv_atomic_int=no])
- ])
- AC_CACHE_CHECK([for atomic builtins for long long],
- glibcxx_cv_atomic_long_long, [
- AC_TRY_LINK(
- [ ],
- [typedef long long atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
- ],
- [glibcxx_cv_atomic_long_long=yes],
- [glibcxx_cv_atomic_long_long=no])
- ])
- else
- # Do asm tests.
- # Compile unoptimized.
- CXXFLAGS='-O0 -S'
- # Fake what AC_TRY_COMPILE does.
- cat > conftest.$ac_ext << EOF
- [#]line __oline__ "configure"
- int main()
- {
- typedef bool atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- // N.B. __atomic_fetch_add is not supported for bool.
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
- return 0;
- }
- EOF
- AC_MSG_CHECKING([for atomic builtins for bool])
- if AC_TRY_EVAL(ac_compile); then
- if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
- glibcxx_cv_atomic_bool=no
- else
- glibcxx_cv_atomic_bool=yes
- fi
- fi
- AC_MSG_RESULT($glibcxx_cv_atomic_bool)
- rm -f conftest*
- cat > conftest.$ac_ext << EOF
- [#]line __oline__ "configure"
- int main()
- {
- typedef short atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
- return 0;
- }
- EOF
- AC_MSG_CHECKING([for atomic builtins for short])
- if AC_TRY_EVAL(ac_compile); then
- if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
- glibcxx_cv_atomic_short=no
- else
- glibcxx_cv_atomic_short=yes
- fi
- fi
- AC_MSG_RESULT($glibcxx_cv_atomic_short)
- rm -f conftest*
- cat > conftest.$ac_ext << EOF
- [#]line __oline__ "configure"
- int main()
- {
- // NB: _Atomic_word not necessarily int.
- typedef int atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
- return 0;
- }
- EOF
- AC_MSG_CHECKING([for atomic builtins for int])
- if AC_TRY_EVAL(ac_compile); then
- if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
- glibcxx_cv_atomic_int=no
- else
- glibcxx_cv_atomic_int=yes
- fi
- fi
- AC_MSG_RESULT($glibcxx_cv_atomic_int)
- rm -f conftest*
- cat > conftest.$ac_ext << EOF
- [#]line __oline__ "configure"
- int main()
- {
- typedef long long atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
- return 0;
- }
- EOF
- AC_MSG_CHECKING([for atomic builtins for long long])
- if AC_TRY_EVAL(ac_compile); then
- if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
- glibcxx_cv_atomic_long_long=no
- else
- glibcxx_cv_atomic_long_long=yes
- fi
- fi
- AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
- rm -f conftest*
- fi
- CXXFLAGS="$old_CXXFLAGS"
- AC_LANG_RESTORE
- # Set atomicity_dir to builtins if all but the long long test above passes,
- # or if the builtins were already chosen (e.g. by configure.host).
- if { test "$glibcxx_cv_atomic_bool" = yes \
- && test "$glibcxx_cv_atomic_short" = yes \
- && test "$glibcxx_cv_atomic_int" = yes; } \
- || test "$atomicity_dir" = "cpu/generic/atomicity_builtins"; then
- AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
- [Define if the compiler supports C++11 atomics.])
- atomicity_dir=cpu/generic/atomicity_builtins
- fi
- # If still generic, set to mutex.
- if test $atomicity_dir = "cpu/generic" ; then
- atomicity_dir=cpu/generic/atomicity_mutex
- AC_MSG_WARN([No native atomic operations are provided for this platform.])
- if test "x$target_thread_file" = xsingle; then
- AC_MSG_WARN([They cannot be faked when thread support is disabled.])
- AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
- else
- AC_MSG_WARN([They will be faked using a mutex.])
- AC_MSG_WARN([Performance of certain classes will degrade as a result.])
- fi
- fi
- ])
- dnl
- dnl Set default lock policy for synchronizing shared_ptr reference counting.
- dnl
- dnl --with-libstdcxx-lock-policy=auto
- dnl Use atomic operations for shared_ptr reference counting only if
- dnl the default target supports atomic compare-and-swap.
- dnl --with-libstdcxx-lock-policy=atomic
- dnl Use atomic operations for shared_ptr reference counting.
- dnl --with-libstdcxx-lock-policy=mutex
- dnl Use a mutex to synchronize shared_ptr reference counting.
- dnl
- dnl This controls the value of __gnu_cxx::__default_lock_policy, which
- dnl determines how shared_ptr reference counts are synchronized.
- dnl The option "atomic" means that atomic operations should be used,
- dnl "mutex" means that a mutex will be used. The default option, "auto",
- dnl will check if the target supports the compiler-generated builtins
- dnl for atomic compare-and-swap operations for 2-byte and 4-byte integers,
- dnl and will use "atomic" if supported, "mutex" otherwise.
- dnl This option is ignored if the thread model used by GCC is "single",
- dnl as no synchronization is used at all in that case.
- dnl This option affects the library ABI (except in the "single" thread model).
- dnl
- dnl Defines _GLIBCXX_HAVE_ATOMIC_LOCK_POLICY to 1 if atomics should be used.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_LOCK_POLICY], [
- AC_ARG_WITH([libstdcxx-lock-policy],
- AC_HELP_STRING([--with-libstdcxx-lock-policy={atomic,mutex,auto}],
- [synchronization policy for shared_ptr reference counting [default=auto]]),
- [libstdcxx_atomic_lock_policy=$withval],
- [libstdcxx_atomic_lock_policy=auto])
- case "$libstdcxx_atomic_lock_policy" in
- atomic|mutex|auto) ;;
- *) AC_MSG_ERROR([Invalid argument for --with-libstdcxx-lock-policy]) ;;
- esac
- AC_MSG_CHECKING([for lock policy for shared_ptr reference counts])
- if test x"$libstdcxx_atomic_lock_policy" = x"auto"; then
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- dnl Why do we care about 2-byte CAS on targets with 4-byte _Atomic_word?!
- dnl Why don't we check 8-byte CAS for sparc64, where _Atomic_word is long?!
- dnl New targets should only check for CAS for the _Atomic_word type.
- AC_TRY_COMPILE([
- #if ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2
- # error "No 2-byte compare-and-swap"
- #elif ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
- # error "No 4-byte compare-and-swap"
- #endif
- ],,
- [libstdcxx_atomic_lock_policy=atomic],
- [libstdcxx_atomic_lock_policy=mutex])
- AC_LANG_RESTORE
- CXXFLAGS="$ac_save_CXXFLAGS"
- fi
- if test x"$libstdcxx_atomic_lock_policy" = x"atomic"; then
- AC_MSG_RESULT(atomic)
- AC_DEFINE(HAVE_ATOMIC_LOCK_POLICY,1,
- [Defined if shared_ptr reference counting should use atomic operations.])
- else
- AC_MSG_RESULT(mutex)
- fi
- ])
- dnl
- dnl Allow visibility attributes to be used on namespaces, objects, etc.
- dnl
- dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
- dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
- dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
- dnl Where DEFAULT is 'yes'.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
- GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
- if test x$enable_libstdcxx_visibility = xyes ; then
- dnl all hail libgfortran
- dnl Check whether the target supports hidden visibility.
- AC_CACHE_CHECK([whether the target supports hidden visibility],
- glibcxx_cv_have_attribute_visibility, [
- save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS -Werror"
- AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
- [], glibcxx_cv_have_attribute_visibility=yes,
- glibcxx_cv_have_attribute_visibility=no)
- CFLAGS="$save_CFLAGS"])
- if test $glibcxx_cv_have_attribute_visibility = no; then
- enable_libstdcxx_visibility=no
- fi
- fi
- GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
- AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
- ])
- dnl
- dnl Add version tags to symbols in shared library (or not), additionally
- dnl marking other symbols as private/local (or not).
- dnl
- dnl Sets libtool_VERSION, and determines shared library SONAME.
- dnl
- dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
- dnl
- dnl --enable-symvers=style adds a version script to the linker call when
- dnl creating the shared library. The choice of version script is
- dnl controlled by 'style'.
- dnl --disable-symvers does not.
- dnl
- dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
- dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
- dnl choose a default style based on linker characteristics. Passing
- dnl 'no' disables versioning.
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
- GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
- [enables symbol versioning of the shared library],
- [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
- # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
- # don't know enough about $LD to do tricks...
- AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
- # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
- # with extern "C++" in version scripts.
- AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
- # Turn a 'yes' into a suitable default.
- if test x$enable_symvers = xyes ; then
- if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
- enable_symvers=no
- else
- if test $with_gnu_ld = yes ; then
- case ${target_os} in
- hpux*)
- enable_symvers=no ;;
- *)
- enable_symvers=gnu ;;
- esac
- else
- case ${target_os} in
- darwin*)
- enable_symvers=darwin ;;
- # Sun symbol versioning exists since Solaris 2.5.
- solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
- # make_sunver.pl needs GNU c++filt to support extern "C++" in
- # version scripts, so disable symbol versioning if none can be
- # found.
- if test -z "$ac_cv_path_CXXFILT"; then
- AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
- AC_MSG_WARN([=== no GNU c++filt could be found.])
- AC_MSG_WARN([=== Symbol versioning will be disabled.])
- enable_symvers=no
- else
- enable_symvers=sun
- fi
- ;;
- *)
- enable_symvers=no ;;
- esac
- fi
- fi
- fi
- # Check to see if 'darwin' or 'darwin-export' can win.
- if test x$enable_symvers = xdarwin-export ; then
- enable_symvers=darwin
- fi
- # Check if 'sun' was requested on non-Solaris 2 platforms.
- if test x$enable_symvers = xsun ; then
- case ${target_os} in
- solaris2*)
- # All fine.
- ;;
- *)
- # Unlikely to work.
- AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
- AC_MSG_WARN([=== you are not targetting Solaris 2.])
- AC_MSG_WARN([=== Symbol versioning will be disabled.])
- enable_symvers=no
- ;;
- esac
- fi
- # Check to see if 'gnu' can win.
- if test $enable_symvers = gnu ||
- test $enable_symvers = gnu-versioned-namespace ||
- test $enable_symvers = sun; then
- # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
- AC_MSG_CHECKING([for shared libgcc])
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS=' -lgcc_s'
- AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
- CFLAGS="$ac_save_CFLAGS"
- if test $glibcxx_shared_libgcc = no; then
- cat > conftest.c <<EOF
- int main (void) { return 0; }
- EOF
- changequote(,)dnl
- glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
- -shared -shared-libgcc -o conftest.so \
- conftest.c -v 2>&1 >/dev/null \
- | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
- changequote([,])dnl
- rm -f conftest.c conftest.so
- if test x${glibcxx_libgcc_s_suffix+set} = xset; then
- CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
- AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
- CFLAGS="$ac_save_CFLAGS"
- fi
- fi
- AC_MSG_RESULT($glibcxx_shared_libgcc)
- # For GNU ld, we need at least this version. The format is described in
- # GLIBCXX_CHECK_LINKER_FEATURES above.
- glibcxx_min_gnu_ld_version=21400
- # If no shared libgcc, can't win.
- if test $glibcxx_shared_libgcc != yes; then
- AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
- AC_MSG_WARN([=== you are not building a shared libgcc_s.])
- AC_MSG_WARN([=== Symbol versioning will be disabled.])
- enable_symvers=no
- elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
- : All interesting versions of Sun ld support sun style symbol versioning.
- elif test $with_gnu_ld != yes ; then
- # just fail for now
- AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
- AC_MSG_WARN([=== you are not using the GNU linker.])
- AC_MSG_WARN([=== Symbol versioning will be disabled.])
- enable_symvers=no
- elif test $glibcxx_ld_is_gold = yes ; then
- : All versions of gold support symbol versioning.
- elif test $glibcxx_ld_is_mold = yes ; then
- : All versions of mold support symbol versioning.
- elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
- # The right tools, the right setup, but too old. Fallbacks?
- AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
- AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
- AC_MSG_WARN(=== You would need to upgrade your binutils to version)
- AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
- AC_MSG_WARN([=== Symbol versioning will be disabled.])
- enable_symvers=no
- fi
- fi
- # For libtool versioning info, format is CURRENT:REVISION:AGE
- libtool_VERSION=6:30:0
- # Everything parsed; figure out what files and settings to use.
- case $enable_symvers in
- no)
- SYMVER_FILE=config/abi/pre/none.ver
- ;;
- gnu)
- SYMVER_FILE=config/abi/pre/gnu.ver
- AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
- [Define to use GNU versioning in the shared library.])
- ;;
- gnu-versioned-namespace)
- libtool_VERSION=8:0:0
- SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
- AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
- [Define to use GNU namespace versioning in the shared library.])
- ;;
- darwin)
- SYMVER_FILE=config/abi/pre/gnu.ver
- AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
- [Define to use darwin versioning in the shared library.])
- ;;
- sun)
- SYMVER_FILE=config/abi/pre/gnu.ver
- AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
- [Define to use Sun versioning in the shared library.])
- ;;
- esac
- if test x$enable_symvers != xno ; then
- AC_DEFINE(_GLIBCXX_SYMVER, 1,
- [Define to use symbol versioning in the shared library.])
- fi
- AC_CACHE_CHECK([whether the target supports .symver directive],
- glibcxx_cv_have_as_symver_directive, [
- AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
- [], glibcxx_cv_have_as_symver_directive=yes,
- glibcxx_cv_have_as_symver_directive=no)])
- if test $glibcxx_cv_have_as_symver_directive = yes; then
- AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
- [Define to 1 if the target assembler supports .symver directive.])
- fi
- AC_SUBST(SYMVER_FILE)
- AC_SUBST(port_specific_symbol_files)
- GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
- GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
- GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
- GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
- GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
- AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
- if test $enable_symvers != no ; then
- case ${target_os} in
- # The Solaris 2 runtime linker doesn't support the GNU extension of
- # binding the same symbol to different versions
- solaris2*)
- ;;
- # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
- *)
- AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
- [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
- ;;
- esac
- fi
- # Now, set up compatibility support, if any.
- # In addition, need this to deal with std::size_t mangling in
- # src/compatibility.cc. In a perfect world, could use
- # typeid(std::size_t).name()[0] to do direct substitution.
- AC_MSG_CHECKING([for size_t as unsigned int])
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS="-Werror"
- AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
- [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
- CFLAGS=$ac_save_CFLAGS
- if test "$glibcxx_size_t_is_i" = yes; then
- AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
- fi
- AC_MSG_RESULT([$glibcxx_size_t_is_i])
- AC_MSG_CHECKING([for ptrdiff_t as int])
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS="-Werror"
- AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
- [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
- CFLAGS=$ac_save_CFLAGS
- if test "$glibcxx_ptrdiff_t_is_i" = yes; then
- AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
- fi
- AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
- ])
- dnl
- dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
- dnl We must stage the required headers so that they will be installed
- dnl with the library (unlike libgcc, the STL implementation is provided
- dnl solely within headers). Since we must not inject random user-space
- dnl macro names into user-provided C++ code, we first stage into <file>-in
- dnl and process to <file> with an output command. The reason for a two-
- dnl stage process here is to correctly handle $srcdir!=$objdir without
- dnl having to write complex code (the sed commands to clean the macro
- dnl namespace are complex and fragile enough as it is). We must also
- dnl add a relative path so that -I- is supported properly.
- dnl
- dnl Substs:
- dnl thread_header
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
- AC_MSG_CHECKING([for thread model used by GCC])
- target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
- AC_MSG_RESULT([$target_thread_file])
- GCC_AC_THREAD_HEADER([$target_thread_file])
- ])
- dnl
- dnl Check if gthread implementation defines the types and functions
- dnl required by the c++0x thread library. Conforming gthread
- dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
- dnl
- dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
- GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
- if test x$enable_libstdcxx_threads = xauto ||
- test x$enable_libstdcxx_threads = xyes; then
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions \
- -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
- target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
- case $target_thread_file in
- posix)
- CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
- esac
- AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
- AC_TRY_COMPILE([#include <unistd.h>],
- [
- // In case of POSIX threads check _POSIX_TIMEOUTS.
- #if (defined(_PTHREADS) \
- && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
- #error
- #endif
- ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
- AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
- [Define to 1 if mutex_timedlock is available.])
- if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
- else res_mutex_timedlock=no ; fi
- AC_MSG_RESULT([$res_mutex_timedlock])
- AC_MSG_CHECKING([for gthreads library])
- AC_TRY_COMPILE([#include "gthr.h"],
- [
- #ifndef __GTHREADS_CXX0X
- #error
- #endif
- ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
- else
- ac_has_gthreads=no
- fi
- AC_MSG_RESULT([$ac_has_gthreads])
- if test x"$ac_has_gthreads" = x"yes"; then
- AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
- [Define if gthreads library is available.])
- # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14
- # but only do so if we're using pthread in the gthread library.
- # On VxWorks for example, pthread_rwlock_t is defined in sys/types.h
- # but the pthread library is not there by default and the gthread library
- # does not use it.
- AC_TRY_COMPILE([#include "gthr.h"],
- [
- #if (!defined(_PTHREADS))
- #error
- #endif
- ], [ac_gthread_use_pthreads=yes], [ac_gthread_use_pthreads=no])
- if test x"$ac_gthread_use_pthreads" = x"yes"; then
- AC_CHECK_TYPE([pthread_rwlock_t],
- [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1,
- [Define if POSIX read/write locks are available in <gthr.h>.])],
- [],
- [#include "gthr.h"])
- fi
- fi
- AC_CHECK_HEADER(semaphore.h, [
- AC_MSG_CHECKING([for POSIX Semaphores and sem_timedwait])
- AC_TRY_COMPILE([
- #include <unistd.h>
- #include <semaphore.h>
- #include <limits.h>
- ],
- [
- #if !defined _POSIX_TIMEOUTS || _POSIX_TIMEOUTS <= 0
- # error "POSIX Timeouts option not supported"
- #elif !defined _POSIX_SEMAPHORES || _POSIX_SEMAPHORES <= 0
- # error "POSIX Semaphores option not supported"
- #else
- #if defined SEM_VALUE_MAX
- constexpr int sem_value_max = SEM_VALUE_MAX;
- #elif defined _POSIX_SEM_VALUE_MAX
- constexpr int sem_value_max = _POSIX_SEM_VALUE_MAX;
- #else
- # error "SEM_VALUE_MAX not available"
- #endif
- sem_t sem;
- sem_init(&sem, 0, sem_value_max);
- struct timespec ts = { 0 };
- sem_timedwait(&sem, &ts);
- #endif
- ],
- [ac_have_posix_semaphore=yes],
- [ac_have_posix_semaphore=no])],
- [ac_have_posix_semaphore=no])
- if test $ac_have_posix_semaphore = yes ; then
- AC_DEFINE(HAVE_POSIX_SEMAPHORE,
- 1,
- [Define to 1 if POSIX Semaphores with sem_timedwait are available in <semaphore.h>.])
- fi
- AC_MSG_RESULT([$ac_have_posix_semaphore])
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- # Check whether LC_MESSAGES is available in <locale.h>.
- # Ulrich Drepper <drepper@cygnus.com>, 1995.
- #
- # This file file be copied and used freely without restrictions. It can
- # be used in projects which are not available under the GNU Public License
- # but which still want to provide support for the GNU gettext functionality.
- # Please note that the actual code is *not* freely available.
- AC_DEFUN([AC_LC_MESSAGES], [
- AC_CHECK_HEADER(locale.h, [
- AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
- [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
- ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
- if test $ac_cv_val_LC_MESSAGES = yes; then
- AC_DEFINE(HAVE_LC_MESSAGES, 1,
- [Define if LC_MESSAGES is available in <locale.h>.])
- fi
- ])
- ])
- dnl
- dnl Check whether rdrand is supported in the assembler.
- AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
- AC_CACHE_CHECK([for rdrand support in assembler],
- ac_cv_x86_rdrand, [
- ac_cv_x86_rdrand=no
- case "$target" in
- i?86-*-* | \
- x86_64-*-*)
- AC_TRY_COMPILE(, [asm("rdrand %eax");],
- [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
- esac
- ])
- if test $ac_cv_x86_rdrand = yes; then
- AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
- [ Defined if as can handle rdrand. ])
- fi
- ])
- dnl
- dnl Check whether rdseed is supported in the assembler.
- AC_DEFUN([GLIBCXX_CHECK_X86_RDSEED], [
- AC_CACHE_CHECK([for rdseed support in assembler],
- ac_cv_x86_rdseed, [
- ac_cv_x86_rdseed=no
- case "$target" in
- i?86-*-* | \
- x86_64-*-*)
- AC_TRY_COMPILE(, [asm("rdseed %eax");],
- [ac_cv_x86_rdseed=yes], [ac_cv_x86_rdseed=no])
- esac
- ])
- if test $ac_cv_x86_rdseed = yes; then
- AC_DEFINE(_GLIBCXX_X86_RDSEED, 1,
- [ Defined if as can handle rdseed. ])
- fi
- ])
- dnl
- dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- AC_CACHE_CHECK([for get_nprocs],
- glibcxx_cv_GET_NPROCS, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <sys/sysinfo.h>],
- [int n = get_nprocs();],
- [glibcxx_cv_GET_NPROCS=yes],
- [glibcxx_cv_GET_NPROCS=no])
- ])
- if test $glibcxx_cv_GET_NPROCS = yes; then
- AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
- fi
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- AC_CACHE_CHECK([for _SC_NPROCESSORS_ONLN],
- glibcxx_cv_SC_NPROCESSORS_ONLN, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <unistd.h>],
- [int n = sysconf(_SC_NPROCESSORS_ONLN);],
- [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
- [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
- ])
- if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
- AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
- fi
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- AC_CACHE_CHECK([for _SC_NPROC_ONLN],
- glibcxx_cv_SC_NPROC_ONLN, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <unistd.h>],
- [int n = sysconf(_SC_NPROC_ONLN);],
- [glibcxx_cv_SC_NPROC_ONLN=yes],
- [glibcxx_cv_SC_NPROC_ONLN=no])
- ])
- if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
- AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
- fi
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- AC_CACHE_CHECK([for pthreads_num_processors_np],
- glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <pthread.h>],
- [int n = pthread_num_processors_np();],
- [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
- [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
- ])
- if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
- AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
- fi
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check whether pthread_cond_clockwait is available in <pthread.h> for std::condition_variable to use,
- dnl and define _GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- ac_save_LIBS="$LIBS"
- LIBS="$LIBS -lpthread"
- AC_CACHE_CHECK([for pthread_cond_clockwait],
- glibcxx_cv_PTHREAD_COND_CLOCKWAIT, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <pthread.h>],
- [pthread_mutex_t mutex; pthread_cond_t cond; struct timespec ts; int n = pthread_cond_clockwait(&cond, &mutex, 0, &ts);],
- [glibcxx_cv_PTHREAD_COND_CLOCKWAIT=yes],
- [glibcxx_cv_PTHREAD_COND_CLOCKWAIT=no])
- ])
- if test $glibcxx_cv_PTHREAD_COND_CLOCKWAIT = yes; then
- AC_DEFINE(_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT, 1, [Define if pthread_cond_clockwait is available in <pthread.h>.])
- fi
- CXXFLAGS="$ac_save_CXXFLAGS"
- LIBS="$ac_save_LIBS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check whether pthread_mutex_clocklock is available in <pthread.h> for std::timed_mutex to use,
- dnl and define _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_PTHREAD_MUTEX_CLOCKLOCK], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- ac_save_LIBS="$LIBS"
- LIBS="$LIBS -lpthread"
- AC_CACHE_CHECK([for pthread_mutex_clocklock],
- glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <pthread.h>],
- [pthread_mutex_t mutex; struct timespec ts; int n = pthread_mutex_clocklock(&mutex, CLOCK_REALTIME, &ts);],
- [glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK=yes],
- [glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK=no])
- ])
- if test $glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK = yes; then
- AC_DEFINE(_GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK, 1, [Define if pthread_mutex_clocklock is available in <pthread.h>.])
- fi
- CXXFLAGS="$ac_save_CXXFLAGS"
- LIBS="$ac_save_LIBS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check whether pthread_mutex_clocklock is available in <pthread.h> for std::timed_mutex to use,
- dnl and define _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_PTHREAD_RWLOCK_CLOCKLOCK], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- ac_save_LIBS="$LIBS"
- LIBS="$LIBS -lpthread"
- AC_CACHE_CHECK([for pthread_rwlock_clockrdlock, pthread_wlock_clockwrlock],
- glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <pthread.h>],
- [pthread_rwlock_t rwl; struct timespec ts;]
- [int n = pthread_rwlock_clockrdlock(&rwl, CLOCK_REALTIME, &ts);]
- [int m = pthread_rwlock_clockwrlock(&rwl, CLOCK_REALTIME, &ts);],
- [glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK=yes],
- [glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK=no])
- ])
- if test $glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK = yes; then
- AC_DEFINE(_GLIBCXX_USE_PTHREAD_RWLOCK_CLOCKLOCK, 1, [Define if pthread_rwlock_clockrdlock and pthread_rwlock_clockwrlock are available in <pthread.h>.])
- fi
- CXXFLAGS="$ac_save_CXXFLAGS"
- LIBS="$ac_save_LIBS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- AC_CACHE_CHECK([for hw.ncpu sysctl],
- glibcxx_cv_SYSCTL_HW_NCPU, [
- GCC_TRY_COMPILE_OR_LINK(
- [
- #include <stddef.h>
- #include <sys/sysctl.h>
- ],
- [
- int count;
- size_t size = sizeof(count);
- int mib[] = { CTL_HW, HW_NCPU };
- sysctl(mib, 2, &count, &size, NULL, 0);
- ],
- [glibcxx_cv_SYSCTL_HW_NCPU=yes],
- [glibcxx_cv_SYSCTL_HW_NCPU=no])
- ])
- if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
- AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
- fi
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check to see if python pretty printing can be activated.
- dnl
- dnl --with-python-dir=dir
- dnl installs directory into $prefix/dir
- AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
- AC_MSG_CHECKING([for custom python install directory])
- AC_ARG_WITH([python-dir],
- AS_HELP_STRING([--with-python-dir],
- [the location to install Python modules. This path is relative starting from the prefix.]),
- [with_python_dir=$withval], [with_python_dir="no"])
- AC_MSG_RESULT(${with_python_dir})
- # Needed for installing Python modules during make install.
- python_mod_dir="${with_python_dir}"
- AC_SUBST(python_mod_dir)
- GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
- ])
- dnl
- dnl Check to see if -Werror is disabled.
- dnl
- dnl --enable-werror/--disable-werror
- AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
- AC_MSG_CHECKING([for -Werror])
- GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
- AC_MSG_RESULT($enable_werror)
- GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
- ])
- dnl
- dnl Check whether obsolescent tmpnam is available in <stdio.h>,
- dnl and define _GLIBCXX_USE_TMPNAM.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
- dnl
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- dnl
- AC_CACHE_CHECK([for tmpnam], glibcxx_cv_TMPNAM, [dnl
- GCC_TRY_COMPILE_OR_LINK(
- [#include <stdio.h>],
- [char *tmp = tmpnam(NULL);],
- [glibcxx_cv_TMPNAM=yes],
- [glibcxx_cv_TMPNAM=no])
- ])
- if test $glibcxx_cv_TMPNAM = yes; then
- AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
- fi
- dnl
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check to see if sys/sdt.h exists and that it is suitable for use.
- dnl Some versions of sdt.h were not compatible with C++11.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
- # Note that this test has to be run with the C language.
- # Otherwise, sdt.h will try to include some headers from
- # libstdc++ itself.
- AC_LANG_SAVE
- AC_LANG_C
- AC_CACHE_CHECK([for suitable sys/sdt.h],
- glibcxx_cv_sys_sdt_h, [
- # Because we have to run the test in C, we use grep rather
- # than the compiler to check for the bug. The bug is that
- # were strings without trailing whitespace, causing g++
- # to look for operator"". The pattern searches for the fixed
- # output.
- AC_EGREP_CPP([ \",\" ], [
- #include <sys/sdt.h>
- int f() { STAP_PROBE(hi, bob); }
- ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
- ])
- AC_LANG_RESTORE
- if test $glibcxx_cv_sys_sdt_h = yes; then
- AC_DEFINE(HAVE_SYS_SDT_H, 1,
- [Define to 1 if you have a suitable <sys/sdt.h> header file])
- fi
- ])
- dnl
- dnl Control whether the library should define symbols for old and new ABIs.
- dnl This affects definitions of strings, stringstreams and locale facets.
- dnl
- dnl --disable-libstdcxx-dual-abi will use old ABI for all types.
- dnl
- dnl Defines:
- dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0)
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [
- GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string])
- if test x$enable_symvers = xgnu-versioned-namespace; then
- # gnu-versioned-namespace is incompatible with the dual ABI.
- enable_libstdcxx_dual_abi="no"
- fi
- if test x"$enable_libstdcxx_dual_abi" != xyes; then
- AC_MSG_NOTICE([dual ABI is disabled])
- default_libstdcxx_abi="gcc4-compatible"
- fi
- GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes)
- ])
- dnl
- dnl Check to see which ABI should be enabled by default.
- dnl
- dnl --with-default-libstdcxx-abi={gcc4-compatible,new}
- dnl
- dnl Defines:
- dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0)
- dnl
- AC_DEFUN([GLIBCXX_DEFAULT_ABI], [
- if test x$enable_libstdcxx_dual_abi = xyes; then
- AC_MSG_CHECKING([for default std::string ABI to use])
- AC_ARG_WITH([default-libstdcxx-abi],
- AS_HELP_STRING([--with-default-libstdcxx-abi],
- [set the std::string ABI to use by default]),
- [case "$withval" in
- gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;;
- new|cxx11) default_libstdcxx_abi="new" ;;
- c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;;
- *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;;
- esac
- ],
- [default_libstdcxx_abi="new"])
- AC_MSG_RESULT(${default_libstdcxx_abi})
- fi
- if test $default_libstdcxx_abi = "new"; then
- glibcxx_cxx11_abi=1
- glibcxx_cxx98_abi=0
- else
- glibcxx_cxx11_abi=0
- glibcxx_cxx98_abi=1
- fi
- AC_SUBST(glibcxx_cxx98_abi)
- GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1)
- ])
- dnl
- dnl Check to see whether to build libstdc++fs.a
- dnl
- dnl --enable-libstdcxx-filesystem-ts
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [
- GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,,
- [turns on ISO/IEC TS 18822 support],
- [permit yes|no|auto])
- AC_MSG_CHECKING([whether to build Filesystem TS support])
- if test x"$ac_cv_header_dirent_h" != x"yes"; then
- enable_libstdcxx_filesystem_ts=no
- fi
- if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then
- case "${target_os}" in
- freebsd*|netbsd*|openbsd*|dragonfly*|darwin*)
- enable_libstdcxx_filesystem_ts=yes
- ;;
- gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu | uclinux*)
- enable_libstdcxx_filesystem_ts=yes
- ;;
- rtems*)
- enable_libstdcxx_filesystem_ts=yes
- ;;
- solaris*)
- enable_libstdcxx_filesystem_ts=yes
- ;;
- mingw*)
- enable_libstdcxx_filesystem_ts=yes
- ;;
- *)
- enable_libstdcxx_filesystem_ts=no
- ;;
- esac
- fi
- AC_MSG_RESULT($enable_libstdcxx_filesystem_ts)
- GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes)
- ])
- dnl
- dnl Check whether the library calls required by the C++17 Filesystem library
- dnl and the Filesystem TS are present.
- dnl Defines:
- dnl HAVE_STRUCT_DIRENT_D_TYPE
- dnl _GLIBCXX_USE_REALPATH
- dnl _GLIBCXX_USE_UTIMENSAT
- dnl _GLIBCXX_USE_ST_MTIM
- dnl _GLIBCXX_USE_FCHMOD
- dnl _GLIBCXX_USE_FCHMODAT
- dnl _GLIBCXX_USE_SENDFILE
- dnl HAVE_LINK
- dnl HAVE_READLINK
- dnl HAVE_SYMLINK
- dnl
- AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl
- dnl
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
- dnl
- AC_CACHE_CHECK([for struct dirent.d_type], glibcxx_cv_dirent_d_type, [dnl
- GCC_TRY_COMPILE_OR_LINK(
- [#include <dirent.h>],
- [
- struct dirent d;
- if (sizeof d.d_type) return 0;
- ],
- [glibcxx_cv_dirent_d_type=yes],
- [glibcxx_cv_dirent_d_type=no])
- ])
- if test $glibcxx_cv_dirent_d_type = yes; then
- AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.])
- fi
- dnl
- AC_CACHE_CHECK([for realpath], glibcxx_cv_realpath, [dnl
- GCC_TRY_COMPILE_OR_LINK(
- [
- #include <limits.h>
- #include <stdlib.h>
- #include <unistd.h>
- ],
- [
- #if _XOPEN_VERSION < 500
- #error
- #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX)
- char *tmp = realpath((const char*)NULL, (char*)NULL);
- #else
- #error
- #endif
- ],
- [glibcxx_cv_realpath=yes],
- [glibcxx_cv_realpath=no])
- ])
- if test $glibcxx_cv_realpath = yes; then
- AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.])
- fi
- dnl
- AC_CACHE_CHECK([for utimensat], glibcxx_cv_utimensat, [dnl
- GCC_TRY_COMPILE_OR_LINK(
- [
- #include <fcntl.h>
- #include <sys/stat.h>
- ],
- [
- struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } };
- int i = utimensat(AT_FDCWD, "path", ts, 0);
- ],
- [glibcxx_cv_utimensat=yes],
- [glibcxx_cv_utimensat=no])
- ])
- if test $glibcxx_cv_utimensat = yes; then
- AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.])
- fi
- dnl
- AC_CACHE_CHECK([for utime], glibcxx_cv_utime, [dnl
- GCC_TRY_COMPILE_OR_LINK(
- [
- #include <utime.h>
- ],
- [
- struct utimbuf t = { 1, 1 };
- int i = utime("path", &t);
- ],
- [glibcxx_cv_utime=yes],
- [glibcxx_cv_utime=no])
- ])
- if test $glibcxx_cv_utime = yes; then
- AC_DEFINE(_GLIBCXX_USE_UTIME, 1, [Define if utime is available in <utime.h>.])
- fi
- dnl
- AC_CACHE_CHECK([for lstat], glibcxx_cv_lstat, [dnl
- GCC_TRY_COMPILE_OR_LINK(
- [ #include <sys/stat.h> ],
- [
- struct stat st;
- int i = lstat("path", &st);
- ],
- [glibcxx_cv_lstat=yes],
- [glibcxx_cv_lstat=no])
- ])
- if test $glibcxx_cv_lstat = yes; then
- AC_DEFINE(_GLIBCXX_USE_LSTAT, 1, [Define if lstat is available in <sys/stat.h>.])
- fi
- dnl
- AC_CACHE_CHECK([for struct stat.st_mtim.tv_nsec],
- glibcxx_cv_st_mtim, [dnl
- GCC_TRY_COMPILE_OR_LINK(
- [ #include <sys/stat.h> ],
- [
- struct stat st;
- return st.st_mtim.tv_nsec;
- ],
- [glibcxx_cv_st_mtim=yes],
- [glibcxx_cv_st_mtim=no])
- ])
- if test $glibcxx_cv_st_mtim = yes; then
- AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.])
- fi
- dnl
- AC_CACHE_CHECK([for fchmod],
- glibcxx_cv_fchmod, [dnl
- GCC_TRY_COMPILE_OR_LINK(
- [#include <sys/stat.h>],
- [fchmod(1, S_IWUSR);],
- [glibcxx_cv_fchmod=yes],
- [glibcxx_cv_fchmod=no])
- ])
- if test $glibcxx_cv_fchmod = yes; then
- AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.])
- fi
- dnl
- AC_CACHE_CHECK([for fchmodat],
- glibcxx_cv_fchmodat, [dnl
- GCC_TRY_COMPILE_OR_LINK(
- [
- #include <fcntl.h>
- #include <sys/stat.h>
- ],
- [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);],
- [glibcxx_cv_fchmodat=yes],
- [glibcxx_cv_fchmodat=no])
- ])
- if test $glibcxx_cv_fchmodat = yes; then
- AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.])
- fi
- dnl
- AC_CACHE_CHECK([for sendfile that can copy files],
- glibcxx_cv_sendfile, [dnl
- case "${target_os}" in
- gnu* | linux* | solaris* | uclinux*)
- GCC_TRY_COMPILE_OR_LINK(
- [#include <sys/sendfile.h>],
- [sendfile(1, 2, (off_t*)0, sizeof 1);],
- [glibcxx_cv_sendfile=yes],
- [glibcxx_cv_sendfile=no])
- ;;
- *)
- glibcxx_cv_sendfile=no
- ;;
- esac
- ])
- if test $glibcxx_cv_sendfile = yes; then
- AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/sendfile.h>.])
- fi
- dnl
- AC_CACHE_CHECK([for link],
- glibcxx_cv_link, [dnl
- GCC_TRY_COMPILE_OR_LINK(
- [#include <unistd.h>],
- [link("", "");],
- [glibcxx_cv_link=yes],
- [glibcxx_cv_link=no])
- ])
- if test $glibcxx_cv_link = yes; then
- AC_DEFINE(HAVE_LINK, 1, [Define if link is available in <unistd.h>.])
- fi
- dnl
- AC_CACHE_CHECK([for readlink],
- glibcxx_cv_readlink, [dnl
- GCC_TRY_COMPILE_OR_LINK(
- [#include <unistd.h>],
- [char buf[32]; readlink("", buf, sizeof(buf));],
- [glibcxx_cv_readlink=yes],
- [glibcxx_cv_readlink=no])
- ])
- if test $glibcxx_cv_readlink = yes; then
- AC_DEFINE(HAVE_READLINK, 1, [Define if readlink is available in <unistd.h>.])
- fi
- dnl
- AC_CACHE_CHECK([for symlink],
- glibcxx_cv_symlink, [dnl
- GCC_TRY_COMPILE_OR_LINK(
- [#include <unistd.h>],
- [symlink("", "");],
- [glibcxx_cv_symlink=yes],
- [glibcxx_cv_symlink=no])
- ])
- if test $glibcxx_cv_symlink = yes; then
- AC_DEFINE(HAVE_SYMLINK, 1, [Define if symlink is available in <unistd.h>.])
- fi
- dnl
- AC_CACHE_CHECK([for truncate],
- glibcxx_cv_truncate, [dnl
- GCC_TRY_COMPILE_OR_LINK(
- [#include <unistd.h>],
- [truncate("", 99);],
- [glibcxx_cv_truncate=yes],
- [glibcxx_cv_truncate=no])
- ])
- if test $glibcxx_cv_truncate = yes; then
- AC_DEFINE(HAVE_TRUNCATE, 1, [Define if truncate is available in <unistd.h>.])
- fi
- dnl
- AC_CACHE_CHECK([for fdopendir],
- glibcxx_cv_fdopendir, [dnl
- GCC_TRY_COMPILE_OR_LINK(
- [#include <dirent.h>],
- [::DIR* dir = ::fdopendir(1);],
- [glibcxx_cv_fdopendir=yes],
- [glibcxx_cv_fdopendir=no])
- ])
- if test $glibcxx_cv_fdopendir = yes; then
- AC_DEFINE(HAVE_FDOPENDIR, 1, [Define if fdopendir is available in <dirent.h>.])
- fi
- dnl
- AC_CACHE_CHECK([for dirfd],
- glibcxx_cv_dirfd, [dnl
- GCC_TRY_COMPILE_OR_LINK(
- [#include <dirent.h>],
- [int fd = ::dirfd((::DIR*)0);],
- [glibcxx_cv_dirfd=yes],
- [glibcxx_cv_dirfd=no])
- ])
- if test $glibcxx_cv_dirfd = yes; then
- AC_DEFINE(HAVE_DIRFD, 1, [Define if dirfd is available in <dirent.h>.])
- fi
- dnl
- AC_CACHE_CHECK([for unlinkat],
- glibcxx_cv_unlinkat, [dnl
- GCC_TRY_COMPILE_OR_LINK(
- [#include <fcntl.h>
- #include <unistd.h>],
- [::unlinkat(AT_FDCWD, "", AT_REMOVEDIR);],
- [glibcxx_cv_unlinkat=yes],
- [glibcxx_cv_unlinkat=no])
- ])
- if test $glibcxx_cv_unlinkat = yes; then
- AC_DEFINE(HAVE_UNLINKAT, 1, [Define if unlinkat is available in <fcntl.h>.])
- fi
- dnl
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check how size_t is mangled. Copied from libitm.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [
- AC_CACHE_CHECK([how size_t is mangled],
- glibcxx_cv_size_t_mangling, [
- AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;],
- [glibcxx_cv_size_t_mangling=m], [
- AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;],
- [glibcxx_cv_size_t_mangling=j], [
- AC_TRY_COMPILE([],
- [extern __SIZE_TYPE__ x; extern unsigned long long x;],
- [glibcxx_cv_size_t_mangling=y], [
- AC_TRY_COMPILE([],
- [extern __SIZE_TYPE__ x; extern unsigned short x;],
- [glibcxx_cv_size_t_mangling=t], [
- AC_TRY_COMPILE([],
- [extern __SIZE_TYPE__ x; extern __int20 unsigned x;],
- [glibcxx_cv_size_t_mangling=u6uint20],
- [glibcxx_cv_size_t_mangling=x])
- ])
- ])
- ])
- ])
- ])
- if test $glibcxx_cv_size_t_mangling = x; then
- AC_MSG_ERROR([Unknown underlying type for size_t])
- fi
- AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling],
- [Define to the letter to which size_t is mangled.])
- ])
- dnl
- dnl Determine whether std::exception_ptr symbols should be exported with
- dnl the symbol versions from GCC 4.6.0 or GCC 7.1.0, depending on which
- dnl release first added support for std::exception_ptr. Originally it was
- dnl only supported for targets with always-lock-free atomics for int, but
- dnl since GCC 7.1 it is supported for all targets.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_EXCEPTION_PTR_SYMVER], [
- if test $enable_symvers != no; then
- AC_MSG_CHECKING([for first version to support std::exception_ptr])
- case ${target} in
- aarch64-*-* | alpha-*-* | hppa*-*-* | i?86-*-* | x86_64-*-* | \
- m68k-*-* | powerpc*-*-* | s390*-*-* | *-*-solaris* )
- ac_exception_ptr_since_gcc46=yes
- ;;
- *)
- # If the value of this macro changes then we will need to hardcode
- # yes/no here for additional targets based on the original value.
- AC_TRY_COMPILE([], [
- #if __GCC_ATOMIC_INT_LOCK_FREE <= 1
- # error atomic int not always lock free
- #endif
- ],
- [ac_exception_ptr_since_gcc46=yes],
- [ac_exception_ptr_since_gcc46=no])
- ;;
- esac
- if test x"$ac_exception_ptr_since_gcc46" = x"yes" ; then
- AC_DEFINE(HAVE_EXCEPTION_PTR_SINCE_GCC46, 1,
- [Define to 1 if GCC 4.6 supported std::exception_ptr for the target])
- AC_MSG_RESULT([4.6.0])
- else
- AC_MSG_RESULT([7.1.0])
- fi
- fi
- ])
- dnl
- dnl Check whether getentropy is present in <unistd.h>.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_GETENTROPY], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- AC_CACHE_CHECK([for getentropy], glibcxx_cv_getentropy, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <unistd.h>],
- [unsigned i;
- ::getentropy(&i, sizeof(i));],
- [glibcxx_cv_getentropy=yes], [glibcxx_cv_getentropy=no])
- ])
- if test $glibcxx_cv_getentropy = yes; then
- AC_DEFINE(HAVE_GETENTROPY, 1, [Define if getentropy is available in <unistd.h>.])
- fi
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check whether arc4random is present in <stdlib.h>.
- dnl
- AC_DEFUN([GLIBCXX_CHECK_ARC4RANDOM], [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- AC_CACHE_CHECK([for arc4random], glibcxx_cv_arc4random, [
- GCC_TRY_COMPILE_OR_LINK(
- [#include <stdlib.h>],
- [unsigned i = ::arc4random();],
- [glibcxx_cv_arc4random=yes], [glibcxx_cv_arc4random=no])
- ])
- if test $glibcxx_cv_arc4random = yes; then
- AC_DEFINE(HAVE_ARC4RANDOM, 1, [Define if arc4random is available in <stdlib.h>.])
- fi
- AC_LANG_RESTORE
- ])
- dnl
- dnl Check to see whether to build libstdc++_libbacktrace.a
- dnl
- dnl --enable-libstdcxx-backtrace
- dnl
- AC_DEFUN([GLIBCXX_ENABLE_BACKTRACE], [
- GLIBCXX_ENABLE(libstdcxx-backtrace,auto,,
- [turns on libbacktrace support],
- [permit yes|no|auto])
- # Most of this is adapted from libsanitizer/configure.ac
- BACKTRACE_CPPFLAGS=
- # libbacktrace only needs atomics for int, which we've already tested
- if test "$glibcxx_cv_atomic_int" = "yes"; then
- BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_ATOMIC_FUNCTIONS=1"
- fi
- # Test for __sync support.
- AC_CACHE_CHECK([__sync extensions],
- [glibcxx_cv_sys_sync],
- [GCC_TRY_COMPILE_OR_LINK(
- [int i;],
- [__sync_bool_compare_and_swap (&i, i, i);
- __sync_lock_test_and_set (&i, 1);
- __sync_lock_release (&i);],
- [glibcxx_cv_sys_sync=yes],
- [glibcxx_cv_sys_sync=no])
- ])
- if test "$glibcxx_cv_sys_sync" = "yes"; then
- BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_SYNC_FUNCTIONS=1"
- fi
- # Check for dl_iterate_phdr.
- AC_CHECK_HEADERS(link.h)
- if test "$ac_cv_header_link_h" = "no"; then
- have_dl_iterate_phdr=no
- else
- # When built as a GCC target library, we can't do a link test.
- AC_EGREP_HEADER([dl_iterate_phdr], [link.h], [have_dl_iterate_phdr=yes],
- [have_dl_iterate_phdr=no])
- fi
- if test "$have_dl_iterate_phdr" = "yes"; then
- BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_DL_ITERATE_PHDR=1"
- fi
- # Check for the fcntl function.
- if test -n "${with_target_subdir}"; then
- case "${host}" in
- *-*-mingw*) have_fcntl=no ;;
- *) have_fcntl=yes ;;
- esac
- else
- AC_CHECK_FUNC(fcntl, [have_fcntl=yes], [have_fcntl=no])
- fi
- if test "$have_fcntl" = "yes"; then
- BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_FCNTL=1"
- fi
- AC_CHECK_DECLS(strnlen)
- # Check for getexecname function.
- if test -n "${with_target_subdir}"; then
- case "${host}" in
- *-*-solaris2*) have_getexecname=yes ;;
- *) have_getexecname=no ;;
- esac
- else
- AC_CHECK_FUNC(getexecname, [have_getexecname=yes], [have_getexecname=no])
- fi
- if test "$have_getexecname" = "yes"; then
- BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_GETEXECNAME=1"
- fi
- # The library needs to be able to read the executable itself. Compile
- # a file to determine the executable format. The awk script
- # filetype.awk prints out the file type.
- AC_CACHE_CHECK([output filetype],
- [glibcxx_cv_sys_filetype],
- [filetype=
- AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM([int i;], [int j;])],
- [filetype=`${AWK} -f $srcdir/../libbacktrace/filetype.awk conftest.$ac_objext`],
- [AC_MSG_FAILURE([compiler failed])])
- glibcxx_cv_sys_filetype=$filetype])
- # Match the file type to decide what files to compile.
- FORMAT_FILE=
- case "$glibcxx_cv_sys_filetype" in
- elf*) FORMAT_FILE="elf.lo" ;;
- *) AC_MSG_WARN([could not determine output file type])
- FORMAT_FILE="unknown.lo"
- enable_libstdcxx_backtrace=no
- ;;
- esac
- AC_SUBST(FORMAT_FILE)
- # ELF defines.
- elfsize=
- case "$glibcxx_cv_sys_filetype" in
- elf32) elfsize=32 ;;
- elf64) elfsize=64 ;;
- esac
- BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DBACKTRACE_ELF_SIZE=$elfsize"
- ALLOC_FILE=alloc.lo
- AC_SUBST(ALLOC_FILE)
- VIEW_FILE=read.lo
- AC_SUBST(VIEW_FILE)
- AC_MSG_CHECKING([whether to build libbacktrace support])
- if test "$enable_libstdcxx_backtrace" == "auto"; then
- enable_libstdcxx_backtrace=no
- fi
- if test "$enable_libstdcxx_backtrace" == "yes"; then
- BACKTRACE_SUPPORTED=1
- BACKTRACE_USES_MALLOC=1
- if test "$ac_has_gthreads" = "yes"; then
- BACKTRACE_SUPPORTS_THREADS=1
- else
- BACKTRACE_SUPPORTS_THREADS=0
- fi
- AC_SUBST(BACKTRACE_CPPFLAGS)
- AC_SUBST(BACKTRACE_SUPPORTED)
- AC_SUBST(BACKTRACE_USES_MALLOC)
- AC_SUBST(BACKTRACE_SUPPORTS_THREADS)
- AC_DEFINE(HAVE_STACKTRACE, 1, [Define if the <stacktrace> header is supported.])
- else
- BACKTRACE_SUPPORTED=0
- BACKTRACE_USES_MALLOC=0
- BACKTRACE_SUPPORTS_THREADS=0
- fi
- AC_MSG_RESULT($enable_libstdcxx_backtrace)
- GLIBCXX_CONDITIONAL(ENABLE_BACKTRACE, [test "$enable_libstdcxx_backtrace" != no])
- ])
- # Macros from the top-level gcc directory.
- m4_include([../config/gc++filt.m4])
- m4_include([../config/tls.m4])
- m4_include([../config/gthr.m4])
- m4_include([../config/cet.m4])
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