Use AC_LINK_IFELSE instead of AC_COMPILE_IFELSE to test for flags that
might succeed during compilation but not during linking. An example is gcc
compiled with libssp support but gnu-ld without it. In this case
-fstack-protector works fine during compilation but fails during linking
as several internal helpers are missing.
---
m4/attributes.m4 | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/m4/attributes.m4 b/m4/attributes.m4
index 7e080da..aa53ef2 100644
--- a/m4/attributes.m4
+++ b/m4/attributes.m4
@@ -42,9 +42,9 @@ AC_DEFUN([CC_CHECK_FLAG_APPEND], [
AS_TR_SH([cc_cv_$2_$3]),
[eval AS_TR_SH([cc_save_$2])='${$2}'
eval AS_TR_SH([$2])='-Werror $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'])
+ 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],
--
1.8.4
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