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131 lines
4.8 KiB
Plaintext
131 lines
4.8 KiB
Plaintext
dnl Common configure.ac fragment
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dnl
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dnl Copyright (C) 2012-2021 Free Software Foundation, Inc.
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dnl
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dnl This file is free software; you can redistribute it and/or modify
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dnl it under the terms of the GNU General Public License as published by
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dnl the Free Software Foundation; either version 3 of the License, or
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dnl (at your option) any later version.
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dnl
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dnl This program is distributed in the hope that it will be useful,
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dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
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dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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dnl GNU General Public License for more details.
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dnl
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dnl You should have received a copy of the GNU General Public License
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dnl along with this program; see the file COPYING3. If not see
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dnl <http://www.gnu.org/licenses/>.
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dnl
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# AC_EGREP_CPP_FOR_BUILD(PATTERN, PROGRAM,
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# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
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# ------------------------------------------------------
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AC_DEFUN([AC_EGREP_CPP_FOR_BUILD],
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[AC_LANG_PREPROC_REQUIRE()dnl
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AC_REQUIRE([AC_PROG_EGREP])dnl
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AC_LANG_CONFTEST([AC_LANG_SOURCE([[$2]])])
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AS_IF([dnl eval is necessary to expand ac_cpp.
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dnl Ultrix and Pyramid sh refuse to redirect output of eval, so use subshell.
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(eval "$ac_cpp_for_build conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
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dnl Quote $1 to prevent m4 from eating character classes
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$EGREP "[$1]" >/dev/null 2>&1],
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[$3],
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[$4])
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rm -f conftest*
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])# AC_EGREP_CPP_FOR_BUILD
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AC_DEFUN([AM_BINUTILS_WARNINGS],[
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# Set the 'development' global.
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. $srcdir/../bfd/development.sh
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# Set acp_cpp_for_build variable
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ac_cpp_for_build="$CC_FOR_BUILD -E $CPPFLAGS_FOR_BUILD"
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# Default set of GCC warnings to enable.
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GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
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GCC_WARN_CFLAGS_FOR_BUILD="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
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# Add -Wshadow if the compiler is a sufficiently recent version of GCC.
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AC_EGREP_CPP([(^[0-3]$|^__GNUC__$)],[__GNUC__],,GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wshadow")
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# Add -Wstack-usage if the compiler is a sufficiently recent version of GCC.
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AC_EGREP_CPP([(^[0-4]$|^__GNUC__$)],[__GNUC__],,GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wstack-usage=262144")
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# Set WARN_WRITE_STRINGS if the compiler supports -Wwrite-strings.
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WARN_WRITE_STRINGS=""
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AC_EGREP_CPP([(^[0-3]$|^__GNUC__$)],[__GNUC__],,WARN_WRITE_STRINGS="-Wwrite-strings")
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# Verify CC_FOR_BUILD to be compatible with warning flags
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# Add -Wshadow if the compiler is a sufficiently recent version of GCC.
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AC_EGREP_CPP_FOR_BUILD([(^[0-3]$|^__GNUC__$)],[__GNUC__],,GCC_WARN_CFLAGS_FOR_BUILD="$GCC_WARN_CFLAGS_FOR_BUILD -Wshadow")
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# Add -Wstack-usage if the compiler is a sufficiently recent version of GCC.
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AC_EGREP_CPP_FOR_BUILD([(^[0-4]$|^__GNUC__$)],[__GNUC__],,GCC_WARN_CFLAGS_FOR_BUILD="$GCC_WARN_CFLAGS_FOR_BUILD -Wstack-usage=262144")
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AC_ARG_ENABLE(werror,
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[ --enable-werror treat compile warnings as errors],
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[case "${enableval}" in
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yes | y) ERROR_ON_WARNING="yes" ;;
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no | n) ERROR_ON_WARNING="no" ;;
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*) AC_MSG_ERROR(bad value ${enableval} for --enable-werror) ;;
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esac])
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# Disable -Wformat by default when using gcc on mingw
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case "${host}" in
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*-*-mingw32*)
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if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
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GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wno-format"
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GCC_WARN_CFLAGS_FOR_BUILD="$GCC_WARN_CFLAGS_FOR_BUILD -Wno-format"
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fi
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;;
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*) ;;
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esac
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# Enable -Werror by default when using gcc. Turn it off for releases.
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if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" -a "$development" = true ; then
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ERROR_ON_WARNING=yes
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fi
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NO_WERROR=
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if test "${ERROR_ON_WARNING}" = yes ; then
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GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Werror"
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GCC_WARN_CFLAGS_FOR_BUILD="$GCC_WARN_CFLAGS_FOR_BUILD -Werror"
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NO_WERROR="-Wno-error"
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fi
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if test "${GCC}" = yes ; then
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WARN_CFLAGS="${GCC_WARN_CFLAGS}"
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WARN_CFLAGS_FOR_BUILD="${GCC_WARN_CFLAGS_FOR_BUILD}"
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fi
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AC_ARG_ENABLE(build-warnings,
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[ --enable-build-warnings enable build-time compiler warnings],
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[case "${enableval}" in
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yes) WARN_CFLAGS="${GCC_WARN_CFLAGS}"
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WARN_CFLAGS_FOR_BUILD="${GCC_WARN_CFLAGS_FOR_BUILD}";;
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no) if test "${GCC}" = yes ; then
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WARN_CFLAGS="-w"
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WARN_CFLAGS_FOR_BUILD="-w"
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fi;;
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,*) t=`echo "${enableval}" | sed -e "s/,/ /g"`
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WARN_CFLAGS="${GCC_WARN_CFLAGS} ${t}"
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WARN_CFLAGS_FOR_BUILD="${GCC_WARN_CFLAGS_FOR_BUILD} ${t}";;
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*,) t=`echo "${enableval}" | sed -e "s/,/ /g"`
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WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}"
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WARN_CFLAGS_FOR_BUILD="${t} ${GCC_WARN_CFLAGS_FOR_BUILD}";;
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*) WARN_CFLAGS=`echo "${enableval}" | sed -e "s/,/ /g"`
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WARN_CFLAGS_FOR_BUILD=`echo "${enableval}" | sed -e "s/,/ /g"`;;
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esac])
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if test x"$silent" != x"yes" && test x"$WARN_CFLAGS" != x""; then
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echo "Setting warning flags = $WARN_CFLAGS" 6>&1
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fi
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AC_SUBST(WARN_CFLAGS)
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AC_SUBST(WARN_CFLAGS_FOR_BUILD)
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AC_SUBST(NO_WERROR)
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AC_SUBST(WARN_WRITE_STRINGS)
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])
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