AC_DEFUN([CC_CHECK_FLAG_APPEND], [
AC_CACHE_CHECK([if $CC supports flag $3 in envvar $2],
AS_TR_SH([cc_cv_$2_$3]),
- [eval "AS_TR_SH([cc_save_$2])='${$2}'"
- eval "AS_TR_SH([$2])='$3'"
- AC_COMPILE_IFELSE([AC_LANG_SOURCE([int a = 0; int main(void) { return a; } ])],
- [eval "AS_TR_SH([cc_cv_$2_$3])='yes'"],
- [eval "AS_TR_SH([cc_cv_$2_$3])='no'"])
- eval "AS_TR_SH([$2])='$cc_save_$2'"])
+ [eval "AS_TR_SH([cc_save_$2])='${$2}'"
+ eval "AS_TR_SH([$2])='-Werror $3'"
+ AC_LINK_IFELSE([AC_LANG_SOURCE([int a = 0; int main(void) { return a; } ])],
+ [eval "AS_TR_SH([cc_cv_$2_$3])='yes'"],
+ [eval "AS_TR_SH([cc_cv_$2_$3])='no'"])
+ eval "AS_TR_SH([$2])='$cc_save_$2'"])
AS_IF([eval test x$]AS_TR_SH([cc_cv_$2_$3])[ = xyes],
[eval "$1='${$1} $3'"])
dnl for a much more readable commandline, so that people can understand what
dnl it does without going to look for what the heck -z defs does.
for possible_flags in "-Wl,--no-undefined" "-Wl,-z,defs"; do
- CC_CHECK_LDFLAGS([$possible_flags], [LDFLAGS_NOUNDEFINED="$possible_flags"])
- break
+ CC_CHECK_LDFLAGS([$possible_flags], [LDFLAGS_NOUNDEFINED="$possible_flags"])
+ break
done
- ;;
+ ;;
esac
AC_SUBST([LDFLAGS_NOUNDEFINED])
[cc_flag_visibility_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $cc_cv_werror"
CC_CHECK_CFLAGS_SILENT([-fvisibility=hidden],
- cc_cv_flag_visibility='yes',
- cc_cv_flag_visibility='no')
+ cc_cv_flag_visibility='yes',
+ cc_cv_flag_visibility='no')
CFLAGS="$cc_flag_visibility_save_CFLAGS"])
AS_IF([test "x$cc_cv_flag_visibility" = "xyes"],
[int some_function() {
int a = 3;
return (int)__builtin_expect(a, 3);
- }])],
+ }])],
[cc_cv_func_expect=yes],
[cc_cv_func_expect=no])
CFLAGS="$ac_save_CFLAGS"