1 dnl Common configure.ac fragment 2 dnl 3 dnl Copyright (C) 2012-2014 Free Software Foundation, Inc. 4 dnl 5 dnl This file is free software; you can redistribute it and/or modify 6 dnl it under the terms of the GNU General Public License as published by 7 dnl the Free Software Foundation; either version 3 of the License, or 8 dnl (at your option) any later version. 9 dnl 10 dnl This program is distributed in the hope that it will be useful, 11 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of 12 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 dnl GNU General Public License for more details. 14 dnl 15 dnl You should have received a copy of the GNU General Public License 16 dnl along with this program; see the file COPYING3. If not see 17 dnl <http://www.gnu.org/licenses/>. 18 dnl 19 20 AC_DEFUN([AM_BINUTILS_WARNINGS],[ 21 # Set the 'development' global. 22 . $srcdir/../bfd/development.sh 23 24 GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes" 25 AC_EGREP_CPP([^[0-3]$],[__GNUC__],,GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wshadow") 26 27 AC_ARG_ENABLE(werror, 28 [ --enable-werror treat compile warnings as errors], 29 [case "${enableval}" in 30 yes | y) ERROR_ON_WARNING="yes" ;; 31 no | n) ERROR_ON_WARNING="no" ;; 32 *) AC_MSG_ERROR(bad value ${enableval} for --enable-werror) ;; 33 esac]) 34 35 # Disable -Wformat by default when using gcc on mingw 36 case "${host}" in 37 *-*-mingw32*) 38 if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then 39 GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wno-format" 40 fi 41 ;; 42 *) ;; 43 esac 44 45 # Enable -Werror by default when using gcc. Turn it off for releases. 46 if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" -a "$development" = true ; then 47 ERROR_ON_WARNING=yes 48 fi 49 50 NO_WERROR= 51 if test "${ERROR_ON_WARNING}" = yes ; then 52 GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Werror" 53 NO_WERROR="-Wno-error" 54 fi 55 56 if test "${GCC}" = yes ; then 57 WARN_CFLAGS="${GCC_WARN_CFLAGS}" 58 fi 59 60 AC_ARG_ENABLE(build-warnings, 61 [ --enable-build-warnings enable build-time compiler warnings], 62 [case "${enableval}" in 63 yes) WARN_CFLAGS="${GCC_WARN_CFLAGS}";; 64 no) if test "${GCC}" = yes ; then 65 WARN_CFLAGS="-w" 66 fi;; 67 ,*) t=`echo "${enableval}" | sed -e "s/,/ /g"` 68 WARN_CFLAGS="${GCC_WARN_CFLAGS} ${t}";; 69 *,) t=`echo "${enableval}" | sed -e "s/,/ /g"` 70 WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}";; 71 *) WARN_CFLAGS=`echo "${enableval}" | sed -e "s/,/ /g"`;; 72 esac]) 73 74 if test x"$silent" != x"yes" && test x"$WARN_CFLAGS" != x""; then 75 echo "Setting warning flags = $WARN_CFLAGS" 6>&1 76 fi 77 78 AC_SUBST(WARN_CFLAGS) 79 AC_SUBST(NO_WERROR) 80 ]) 81
