1 # Copyright © 2006 Rémi Denis-Courmont
2 # <rdenis (at) simphalempin (dot) com>.
3 # This file (flags.m4) is free software; unlimited permission to
4 # copy and/or distribute it , with or without modifications, as long
5 # as this notice is preserved.
7 # This program is distributed in the hope that it will be useful,
8 # but WITHOUT ANY WARRANTY, to the extent permitted by law; without
9 # even the implied warranty of MERCHANTABILITY or FITNESS FOR A
12 AC_DEFUN([RDC_PROG_CC_FLAGS_IFELSE],
14 CFLAGS_save="${CFLAGS}"
15 as_ac_var=`echo "ac_cv_prog_cc_flags_$1" | $as_tr_sh`
16 AC_CACHE_CHECK([if $CC accepts $1], [$as_ac_var], [
18 AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [
25 ac_res=`eval echo '${'$as_ac_var'}'`
26 CFLAGS="${CFLAGS_save}"
27 AS_IF([test "${ac_res}" != "no"], [$2], [$3])
30 AC_DEFUN([RDC_PROG_CC_FLAGS],
32 RDC_PROG_CC_FLAGS_IFELSE([$1], [CFLAGS="${CFLAGS} $1"])
35 AC_DEFUN([RDC_PROG_CC_WERRORFLAGS],
37 RDC_PROG_CC_FLAGS_IFELSE([-Werror=$a], [CFLAGS_WERROR="${CFLAGS_WERROR} -Werror=${a}"])
41 AC_DEFUN([RDC_PROG_CC_WFLAGS],
43 RDC_PROG_CC_FLAGS([-W$a])
47 AC_DEFUN([RDC_PROG_LINK_FLAGS_IFELSE],
49 LDFLAGS_save="${LDFLAGS}"
50 as_ac_var=`echo "ac_cv_prog_link_flags_$1" | $as_tr_sh`
51 AC_CACHE_CHECK([if $LINK accepts $1], [$as_ac_var], [
52 LDFLAGS="${LDFLAGS} $1"
53 AC_LINK_IFELSE([AC_LANG_PROGRAM()], [
60 ac_res=`eval echo '${'$as_ac_var'}'`
61 AS_IF([test "${ac_res}" != "no"], [
62 LDFLAGS="${LDFLAGS} $1"
65 LDFLAGS="${LDFLAGS_save}"