174 lines
6.7 KiB
Plaintext
174 lines
6.7 KiB
Plaintext
##### http://autoconf-archive.cryp.to/ax_cflags_strict_prototypes.html
|
|
#
|
|
# SYNOPSIS
|
|
#
|
|
# AX_CFLAGS_STRICT_PROTOTYPES [(shellvar [,default, [A/NA]]
|
|
#
|
|
# DESCRIPTION
|
|
#
|
|
# Try to find a compiler option that requires strict prototypes.
|
|
#
|
|
# The sanity check is done by looking at sys/signal.h which has a set
|
|
# of macro-definitions SIG_DFL and SIG_IGN that are cast to the local
|
|
# signal-handler type. If that signal-handler type is not fully
|
|
# qualified then the system headers are not seen as strictly
|
|
# prototype clean.
|
|
#
|
|
# For the GNU CC compiler it will be -fstrict-prototypes
|
|
# -Wstrict-prototypes The result is added to the shellvar being
|
|
# CFLAGS by default.
|
|
#
|
|
# DEFAULTS:
|
|
#
|
|
# - $1 shell-variable-to-add-to : CFLAGS
|
|
# - $2 add-value-if-not-found : nothing
|
|
# - $3 action-if-found : add value to shellvariable
|
|
# - $4 action-if-not-found : nothing
|
|
#
|
|
# LAST MODIFICATION
|
|
#
|
|
# 2006-12-12
|
|
#
|
|
# COPYLEFT
|
|
#
|
|
# Copyright (c) 2006 Guido U. Draheim <guidod@gmx.de>
|
|
#
|
|
# This program is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU General Public License as
|
|
# published by the Free Software Foundation; either version 2 of the
|
|
# License, or (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful, but
|
|
# WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
# General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program; if not, write to the Free Software
|
|
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
|
|
# 02111-1307, USA.
|
|
#
|
|
# As a special exception, the respective Autoconf Macro's copyright
|
|
# owner gives unlimited permission to copy, distribute and modify the
|
|
# configure scripts that are the output of Autoconf when processing
|
|
# the Macro. You need not follow the terms of the GNU General Public
|
|
# License when using or distributing such scripts, even though
|
|
# portions of the text of the Macro appear in them. The GNU General
|
|
# Public License (GPL) does govern all other use of the material that
|
|
# constitutes the Autoconf Macro.
|
|
#
|
|
# This special exception to the GPL applies to versions of the
|
|
# Autoconf Macro released by the Autoconf Macro Archive. When you
|
|
# make and distribute a modified version of the Autoconf Macro, you
|
|
# may extend this special exception to the GPL to apply to your
|
|
# modified version as well.
|
|
|
|
AC_DEFUN([AX_CFLAGS_STRICT_PROTOTYPES],[dnl
|
|
AS_VAR_PUSHDEF([FLAGS],[CFLAGS])dnl
|
|
AS_VAR_PUSHDEF([VAR],[ac_cv_cflags_strict_prototypes])dnl
|
|
AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for strict prototypes],
|
|
VAR,[VAR="no, unknown"
|
|
AC_LANG_SAVE
|
|
AC_LANG_C
|
|
ac_save_[]FLAGS="$[]FLAGS"
|
|
for ac_arg dnl
|
|
in "-pedantic % -fstrict-prototypes -Wstrict-prototypes" dnl GCC
|
|
"-pedantic % -Wstrict-prototypes" dnl try to warn atleast
|
|
"-pedantic % -Wmissing-prototypes" dnl or another warning
|
|
"-pedantic % -Werror-implicit-function-declaration" dnl
|
|
"-pedantic % -Wimplicit-function-declaration" dnl
|
|
#
|
|
do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
|
|
AC_TRY_COMPILE([],[return 0;],
|
|
[VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
|
|
done
|
|
case ".$VAR" in
|
|
.|.no|.no,*) ;;
|
|
*) # sanity check with signal() from sys/signal.h
|
|
cp config.log config.tmp
|
|
AC_TRY_COMPILE([#include <signal.h>],[
|
|
if (signal (SIGINT, SIG_IGN) == SIG_DFL) return 1;
|
|
if (signal (SIGINT, SIG_IGN) != SIG_DFL) return 2;],
|
|
dnl the original did use test -n `$CC testprogram.c`
|
|
[if test `diff config.log config.tmp | grep -i warning | wc -l` != 0
|
|
then if test `diff config.log config.tmp | grep -i warning | wc -l` != 1
|
|
then VAR="no, suppressed, signal.h," ; fi ; fi],
|
|
[VAR="no, suppressed, signal.h"])
|
|
rm config.tmp
|
|
;;
|
|
esac
|
|
FLAGS="$ac_save_[]FLAGS"
|
|
AC_LANG_RESTORE
|
|
])
|
|
case ".$VAR" in
|
|
.ok|.ok,*) m4_ifvaln($3,$3) ;;
|
|
.|.no|.no,*) m4_ifvaln($4,$4,[m4_ifval($2,[
|
|
AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])
|
|
m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])]) ;;
|
|
*) m4_ifvaln($3,$3,[
|
|
if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
|
|
then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR])
|
|
else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"])
|
|
m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"
|
|
fi ]) ;;
|
|
esac
|
|
AS_VAR_POPDEF([VAR])dnl
|
|
AS_VAR_POPDEF([FLAGS])dnl
|
|
])
|
|
|
|
dnl the only difference - the LANG selection... and the default FLAGS
|
|
|
|
AC_DEFUN([AX_CXXFLAGS_STRICT_PROTOTYPES],[dnl
|
|
AS_VAR_PUSHDEF([FLAGS],[CXXFLAGS])dnl
|
|
AS_VAR_PUSHDEF([VAR],[ac_cv_cxxflags_strict_prototypes])dnl
|
|
AC_CACHE_CHECK([m4_ifval($1,$1,FLAGS) for strict prototypes],
|
|
VAR,[VAR="no, unknown"
|
|
AC_LANG_SAVE
|
|
AC_LANG_CPLUSPLUS
|
|
ac_save_[]FLAGS="$[]FLAGS"
|
|
for ac_arg dnl
|
|
in "-pedantic -Werror % -fstrict-prototypes -Wstrict-prototypes" dnl GCC
|
|
"-pedantic -Werror % -Wstrict-prototypes" dnl try to warn atleast
|
|
"-pedantic -Werror % -Wmissing-prototypes" dnl try to warn atleast
|
|
"-pedantic -Werror % -Werror-implicit-function-declaration" dnl
|
|
"-pedantic -Werror % -Wimplicit-function-declaration" dnl
|
|
"-pedantic % -Wstrict-prototypes %% no, unsupported in C++" dnl oops
|
|
#
|
|
do FLAGS="$ac_save_[]FLAGS "`echo $ac_arg | sed -e 's,%%.*,,' -e 's,%,,'`
|
|
AC_TRY_COMPILE([],[return 0;],
|
|
[VAR=`echo $ac_arg | sed -e 's,.*% *,,'` ; break])
|
|
done
|
|
case ".$VAR" in
|
|
.|.no|.no,*) ;;
|
|
*) # sanity check with signal() from sys/signal.h
|
|
cp config.log config.tmp
|
|
AC_TRY_COMPILE([#include <signal.h>],[
|
|
if (signal (SIGINT, SIG_IGN) == SIG_DFL) return 1;
|
|
if (signal (SIGINT, SIG_IGN) != SIG_DFL) return 2;],
|
|
dnl the original did use test -n `$CC testprogram.c`
|
|
[if test `diff config.log config.tmp | grep -i warning | wc -l` != 0
|
|
then if test `diff config.log config.tmp | grep -i warning | wc -l` != 1
|
|
then VAR="no, suppressed, signal.h," ; fi ; fi],
|
|
[VAR="no, suppressed, signal.h"])
|
|
rm config.tmp
|
|
;;
|
|
esac
|
|
FLAGS="$ac_save_[]FLAGS"
|
|
AC_LANG_RESTORE
|
|
])
|
|
case ".$VAR" in
|
|
.ok|.ok,*) m4_ifvaln($3,$3) ;;
|
|
.|.no|.no,*) m4_ifvaln($4,$4,[m4_ifval($2,[
|
|
AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])
|
|
m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $2"])]) ;;
|
|
*) m4_ifvaln($3,$3,[
|
|
if echo " $[]m4_ifval($1,$1,FLAGS) " | grep " $VAR " 2>&1 >/dev/null
|
|
then AC_RUN_LOG([: m4_ifval($1,$1,FLAGS) does contain $VAR])
|
|
else AC_RUN_LOG([: m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"])
|
|
m4_ifval($1,$1,FLAGS)="$m4_ifval($1,$1,FLAGS) $VAR"
|
|
fi ]) ;;
|
|
esac
|
|
AS_VAR_POPDEF([VAR])dnl
|
|
AS_VAR_POPDEF([FLAGS])dnl
|
|
])
|