dnl Common configure.ac fragment dnl dnl Copyright (C) 2012-2017 Free Software Foundation, Inc. dnl dnl This file 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; see the file COPYING3. If not see dnl <http://www.gnu.org/licenses/>. dnl # AC_EGREP_CPP_FOR_BUILD(PATTERN, PROGRAM, # [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) # ------------------------------------------------------ AC_DEFUN([AC_EGREP_CPP_FOR_BUILD], [AC_LANG_PREPROC_REQUIRE()dnl AC_REQUIRE([AC_PROG_EGREP])dnl AC_LANG_CONFTEST([AC_LANG_SOURCE([[$2]])]) AS_IF([dnl eval is necessary to expand ac_cpp. dnl Ultrix and Pyramid sh refuse to redirect output of eval, so use subshell. (eval "$ac_cpp_for_build conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD | dnl Quote $1 to prevent m4 from eating character classes $EGREP "[$1]" >/dev/null 2>&1], [$3], [$4]) rm -f conftest* ])# AC_EGREP_CPP_FOR_BUILD AC_DEFUN([AM_BINUTILS_WARNINGS],[ # Set the 'development' global. . $srcdir/../bfd/development.sh # Set acp_cpp_for_build variable ac_cpp_for_build="$CC_FOR_BUILD -E $CPPFLAGS_FOR_BUILD" # Default set of GCC warnings to enable. GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes" GCC_WARN_CFLAGS_FOR_BUILD="-W -Wall -Wstrict-prototypes -Wmissing-prototypes" # Add -Wshadow if the compiler is a sufficiently recent version of GCC. AC_EGREP_CPP([^[0-3]$],[__GNUC__],,GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wshadow") # Add -Wstack-usage if the compiler is a sufficiently recent version of GCC. AC_EGREP_CPP([^[0-4]$],[__GNUC__],,GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wstack-usage=262144") # Set WARN_WRITE_STRINGS if the compiler supports -Wwrite-strings. WARN_WRITE_STRINGS="" AC_EGREP_CPP([^[0-3]$],[__GNUC__],,WARN_WRITE_STRINGS="-Wwrite-strings") # Verify CC_FOR_BUILD to be compatible with warning flags # Add -Wshadow if the compiler is a sufficiently recent version of GCC. AC_EGREP_CPP_FOR_BUILD([^[0-3]$],[__GNUC__],,GCC_WARN_CFLAGS_FOR_BUILD="$GCC_WARN_CFLAGS_FOR_BUILD -Wshadow") # Add -Wstack-usage if the compiler is a sufficiently recent version of GCC. AC_EGREP_CPP_FOR_BUILD([^[0-4]$],[__GNUC__],,GCC_WARN_CFLAGS_FOR_BUILD="$GCC_WARN_CFLAGS_FOR_BUILD -Wstack-usage=262144") AC_ARG_ENABLE(werror, [ --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 ${enableval} for --enable-werror) ;; esac]) # Disable -Wformat by default when using gcc on mingw case "${host}" in *-*-mingw32*) if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wno-format" GCC_WARN_CFLAGS_FOR_BUILD="$GCC_WARN_CFLAGS_FOR_BUILD -Wno-format" fi ;; *) ;; esac # Enable -Werror by default when using gcc. Turn it off for releases. if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" -a "$development" = true ; then ERROR_ON_WARNING=yes fi NO_WERROR= if test "${ERROR_ON_WARNING}" = yes ; then GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Werror" GCC_WARN_CFLAGS_FOR_BUILD="$GCC_WARN_CFLAGS_FOR_BUILD -Werror" NO_WERROR="-Wno-error" fi if test "${GCC}" = yes ; then WARN_CFLAGS="${GCC_WARN_CFLAGS}" WARN_CFLAGS_FOR_BUILD="${GCC_WARN_CFLAGS_FOR_BUILD}" fi AC_ARG_ENABLE(build-warnings, [ --enable-build-warnings enable build-time compiler warnings], [case "${enableval}" in yes) WARN_CFLAGS="${GCC_WARN_CFLAGS}" WARN_CFLAGS_FOR_BUILD="${GCC_WARN_CFLAGS_FOR_BUILD}";; no) if test "${GCC}" = yes ; then WARN_CFLAGS="-w" WARN_CFLAGS_FOR_BUILD="-w" fi;; ,*) t=`echo "${enableval}" | sed -e "s/,/ /g"` WARN_CFLAGS="${GCC_WARN_CFLAGS} ${t}" WARN_CFLAGS_FOR_BUILD="${GCC_WARN_CFLAGS_FOR_BUILD} ${t}";; *,) t=`echo "${enableval}" | sed -e "s/,/ /g"` WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}" WARN_CFLAGS_FOR_BUILD="${t} ${GCC_WARN_CFLAGS_FOR_BUILD}";; *) WARN_CFLAGS=`echo "${enableval}" | sed -e "s/,/ /g"` WARN_CFLAGS_FOR_BUILD=`echo "${enableval}" | sed -e "s/,/ /g"`;; esac]) if test x"$silent" != x"yes" && test x"$WARN_CFLAGS" != x""; then echo "Setting warning flags = $WARN_CFLAGS" 6>&1 fi AC_SUBST(WARN_CFLAGS) AC_SUBST(WARN_CFLAGS_FOR_BUILD) AC_SUBST(NO_WERROR) AC_SUBST(WARN_WRITE_STRINGS) ])