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- AC_INIT([LTO plugin for ld], 0.1,,[lto-plugin])
- AC_CANONICAL_SYSTEM
- GCC_TOPLEV_SUBDIRS
- AM_INIT_AUTOMAKE([foreign no-dist])
- AM_MAINTAINER_MODE
- AC_ARG_WITH(libiberty,
- [AS_HELP_STRING([--with-libiberty=PATH],
- [specify the directory where to find libiberty [../libiberty]])],
- [], with_libiberty=../libiberty)
- AC_SUBST(with_libiberty)
- AC_USE_SYSTEM_EXTENSIONS
- AC_PROG_CC
- AC_SYS_LARGEFILE
- ACX_PROG_CC_WARNING_OPTS([-Wall], [ac_lto_plugin_warn_cflags])
- # Check whether -static-libgcc is supported.
- saved_LDFLAGS="$LDFLAGS"
- LDFLAGS="$LDFLAGS -static-libgcc"
- AC_MSG_CHECKING([for -static-libgcc])
- AC_LINK_IFELSE([AC_LANG_SOURCE([
- int main() {}])], [have_static_libgcc=yes], [have_static_libgcc=no])
- AC_MSG_RESULT($have_static_libgcc);
- LDFLAGS="$saved_LDFLAGS"
- # Need -Wc to get it through libtool.
- if test "x$have_static_libgcc" = xyes; then
- ac_lto_plugin_ldflags="-Wc,-static-libgcc"
- fi
- AC_SUBST(ac_lto_plugin_ldflags)
- GCC_CET_HOST_FLAGS(CET_HOST_FLAGS)
- AC_SUBST(CET_HOST_FLAGS)
- if test x"$host_subdir" = x.; then
- gcc_build_dir=../gcc
- else
- gcc_build_dir=../../$host_subdir/gcc
- fi
- AC_SUBST(gcc_build_dir)
- # Used for constructing correct paths for offload compilers.
- accel_dir_suffix=
- real_target_noncanonical=${target_noncanonical}
- if test x"$enable_as_accelerator_for" != x; then
- accel_dir_suffix=/accel/${target_noncanonical}
- real_target_noncanonical=${enable_as_accelerator_for}
- fi
- AC_SUBST(accel_dir_suffix)
- AC_SUBST(real_target_noncanonical)
- # Determine what GCC version number to use in filesystem paths.
- GCC_BASE_VER
- AC_MSG_CHECKING([whether symbol versioning is supported])
- lto_plugin_use_symver=no
- if test x$gcc_no_link = xyes; then
- # If we cannot link, we cannot build shared libraries, so do not use
- # symbol versioning.
- lto_plugin_use_symver=no
- else
- save_LDFLAGS="$LDFLAGS"
- LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map"
- cat > conftest.map <<EOF
- {
- global: *foo*; bar; local: *;
- };
- EOF
- AC_TRY_LINK([int foo;],[],[lto_plugin_use_symver=gnu],[lto_plugin_use_symver=no])
- if test x$lto_plugin_use_symver = xno; then
- case "$target_os" in
- solaris2*)
- LDFLAGS="$save_LDFLAGS"
- LDFLAGS="$LDFLAGS -fPIC -shared -Wl,-M,./conftest.map"
- # Sun ld cannot handle wildcards and treats all entries as undefined.
- cat > conftest.map <<EOF
- {
- global: foo; local: *;
- };
- EOF
- AC_TRY_LINK([int foo;],[],[lto_plugin_use_symver=sun],[lto_plugin_use_symver=no])
- ;;
- esac
- fi
- LDFLAGS="$save_LDFLAGS"
- fi
- AC_MSG_RESULT($lto_plugin_use_symver)
- AM_CONDITIONAL(LTO_PLUGIN_USE_SYMVER, [test "x$lto_plugin_use_symver" != xno])
- AM_CONDITIONAL(LTO_PLUGIN_USE_SYMVER_GNU, [test "x$lto_plugin_use_symver" = xgnu])
- AM_CONDITIONAL(LTO_PLUGIN_USE_SYMVER_SUN, [test "x$lto_plugin_use_symver" = xsun])
- AM_PROG_LIBTOOL
- ACX_LT_HOST_FLAGS
- AC_SUBST(target_noncanonical)
- AC_TYPE_INT64_T
- AC_TYPE_UINT64_T
- AC_HEADER_SYS_WAIT
- AC_CONFIG_FILES(Makefile)
- AC_CONFIG_HEADERS(config.h)
- AC_OUTPUT
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