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Diffstat (limited to '')
| -rw-r--r-- | m4/cflags.m4 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/m4/cflags.m4 b/m4/cflags.m4 new file mode 100644 index 000000000..cc6d5fab3 --- /dev/null +++ b/m4/cflags.m4 @@ -0,0 +1,15 @@ +AC_DEFUN([CHECK_CFLAG], [ + var=`echo "$1" | tr "=-" "__"` + AC_CACHE_CHECK([whether the C compiler accepts $1],[check_cflag_$var],[ + save_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS $1" + AC_COMPILE_IFELSE([int main(void) { return 0; }], + [eval "check_cflag_$var=yes"], + [eval "check_cflag_$var=no"]) + CFLAGS="$save_CFLAGS" + ]) + if eval "test x`echo '$check_cflag_'$var` = xyes"; then + AM_CFLAGS="$AM_CFLAGS $1" + fi + ]) +]) |