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