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- dnl Copyright (C) 1997-2022 Free Software Foundation, Inc.
- dnl
- dnl This program is free software; you can redistribute it and/or modify
- dnl it under the terms of the GNU General Public License as published by
- dnl the Free Software Foundation; either version 3 of the License, or
- dnl (at your option) any later version.
- dnl
- dnl This program is distributed in the hope that it will be useful,
- dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
- dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- dnl GNU General Public License for more details.
- dnl
- dnl You should have received a copy of the GNU General Public License
- dnl along with this program. If not, see <http://www.gnu.org/licenses/>.
- dnl
- dnl --enable-build-warnings is for developers of the simulator.
- dnl it enables extra GCC specific warnings.
- AC_DEFUN([SIM_AC_OPTION_WARNINGS],
- [
- AC_ARG_ENABLE(werror,
- AS_HELP_STRING([--enable-werror], [treat compile warnings as errors]),
- [case "${enableval}" in
- yes | y) ERROR_ON_WARNING="yes" ;;
- no | n) ERROR_ON_WARNING="no" ;;
- *) AC_MSG_ERROR(bad value ${enableval} for --enable-werror) ;;
- esac])
- dnl Enable -Werror by default when using gcc
- if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
- ERROR_ON_WARNING=yes
- fi
- WERROR_CFLAGS=""
- if test "${ERROR_ON_WARNING}" = yes ; then
- WERROR_CFLAGS="-Werror"
- fi
- dnl The options we'll try to enable.
- dnl NB: Kept somewhat in sync with gdbsupport/warnings.m4.
- build_warnings="-Wall -Wdeclaration-after-statement -Wpointer-arith
- -Wno-unused -Wunused-value -Wunused-function
- -Wno-switch -Wno-char-subscripts
- -Wempty-body -Wunused-but-set-parameter
- -Wno-error=maybe-uninitialized
- -Wmissing-declarations
- -Wmissing-prototypes
- -Wdeclaration-after-statement -Wmissing-parameter-type
- -Wpointer-sign
- -Wold-style-declaration -Wold-style-definition
- "
- # Enable -Wno-format by default when using gcc on mingw since many
- # GCC versions complain about %I64.
- case "${host}" in
- *-*-mingw32*) build_warnings="$build_warnings -Wno-format" ;;
- *) build_warnings="$build_warnings -Wformat-nonliteral" ;;
- esac
- AC_ARG_ENABLE(build-warnings,
- AS_HELP_STRING([--enable-build-warnings], [enable build-time compiler warnings if gcc is used]),
- [case "${enableval}" in
- yes) ;;
- no) build_warnings="-w";;
- ,*) t=`echo "${enableval}" | sed -e "s/,/ /g"`
- build_warnings="${build_warnings} ${t}";;
- *,) t=`echo "${enableval}" | sed -e "s/,/ /g"`
- build_warnings="${t} ${build_warnings}";;
- *) build_warnings=`echo "${enableval}" | sed -e "s/,/ /g"`;;
- esac
- if test x"$silent" != x"yes" && test x"$build_warnings" != x""; then
- echo "Setting compiler warning flags = $build_warnings" 6>&1
- fi])dnl
- AC_ARG_ENABLE(sim-build-warnings,
- AS_HELP_STRING([--enable-sim-build-warnings], [enable SIM specific build-time compiler warnings if gcc is used]),
- [case "${enableval}" in
- yes) ;;
- no) build_warnings="-w";;
- ,*) t=`echo "${enableval}" | sed -e "s/,/ /g"`
- build_warnings="${build_warnings} ${t}";;
- *,) t=`echo "${enableval}" | sed -e "s/,/ /g"`
- build_warnings="${t} ${build_warnings}";;
- *) build_warnings=`echo "${enableval}" | sed -e "s/,/ /g"`;;
- esac
- if test x"$silent" != x"yes" && test x"$build_warnings" != x""; then
- echo "Setting GDB specific compiler warning flags = $build_warnings" 6>&1
- fi])dnl
- WARN_CFLAGS=""
- if test "x${build_warnings}" != x -a "x$GCC" = xyes
- then
- AC_MSG_CHECKING(compiler warning flags)
- # Separate out the -Werror flag as some files just cannot be
- # compiled with it enabled.
- for w in ${build_warnings}; do
- case $w in
- -Werr*) WERROR_CFLAGS=-Werror ;;
- *) # Check that GCC accepts it
- saved_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS -Werror $w"
- AC_TRY_COMPILE([],[],WARN_CFLAGS="${WARN_CFLAGS} $w",)
- CFLAGS="$saved_CFLAGS"
- esac
- done
- AC_MSG_RESULT(${WARN_CFLAGS} ${WERROR_CFLAGS})
- fi
- ])
- AC_SUBST(WARN_CFLAGS)
- AC_SUBST(WERROR_CFLAGS)
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