bfd/warning.m4

   1 dnl Common configure.in 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 GCC_WARN_CFLAGS="-W -Wall -Wstrict-prototypes -Wmissing-prototypes"
  22 AC_EGREP_CPP([^[0-3]$],[__GNUC__],,GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wshadow")
  23
  24 AC_ARG_ENABLE(werror,
  25   [  --enable-werror         treat compile warnings as errors],
  26   [case "${enableval}" in
  27      yes | y) ERROR_ON_WARNING="yes" ;;
  28      no | n)  ERROR_ON_WARNING="no" ;;
  29      *) AC_MSG_ERROR(bad value ${enableval} for --enable-werror) ;;
  30    esac])
  31
  32 # Disable -Wformat by default when using gcc on mingw
  33 case "${host}" in
  34   *-*-mingw32*)
  35     if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
  36       GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Wno-format"
  37     fi
  38     ;;
  39   *) ;;
  40 esac
  41
  42 # Enable -Werror by default when using gcc
  43 if test "${GCC}" = yes -a -z "${ERROR_ON_WARNING}" ; then
  44     ERROR_ON_WARNING=yes
  45 fi
  46
  47 NO_WERROR=
  48 if test "${ERROR_ON_WARNING}" = yes ; then
  49     GCC_WARN_CFLAGS="$GCC_WARN_CFLAGS -Werror"
  50     NO_WERROR="-Wno-error"
  51 fi
  52
  53 if test "${GCC}" = yes ; then
  54   WARN_CFLAGS="${GCC_WARN_CFLAGS}"
  55 fi
  56
  57 AC_ARG_ENABLE(build-warnings,
  58 [  --enable-build-warnings enable build-time compiler warnings],
  59 [case "${enableval}" in
  60   yes)  WARN_CFLAGS="${GCC_WARN_CFLAGS}";;
  61   no)   if test "${GCC}" = yes ; then
  62           WARN_CFLAGS="-w"
  63         fi;;
  64   ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
  65         WARN_CFLAGS="${GCC_WARN_CFLAGS} ${t}";;
  66   *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
  67         WARN_CFLAGS="${t} ${GCC_WARN_CFLAGS}";;
  68   *)    WARN_CFLAGS=`echo "${enableval}" | sed -e "s/,/ /g"`;;
  69 esac])
  70
  71 if test x"$silent" != x"yes" && test x"$WARN_CFLAGS" != x""; then
  72   echo "Setting warning flags = $WARN_CFLAGS" 6>&1
  73 fi
  74
  75 AC_SUBST(WARN_CFLAGS)
  76 AC_SUBST(NO_WERROR)
  77 ])