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authorDavid Herrmann <dh.herrmann@gmail.com>2013-09-13 12:42:12 +0200
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2013-09-16 09:59:16 -0500
commitd8c8508bad097c5cc354b684866a5b7a83fce394 (patch)
tree7a696ae6d2e8e93f89261493d001358336ae9e93 /m4
parent4b549144d82ea0f368321d149215f577049fffa6 (diff)
build: check for build/link flags harder
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.
Diffstat (limited to 'm4')
-rw-r--r--m4/attributes.m46
1 files changed, 3 insertions, 3 deletions
diff --git a/m4/attributes.m4 b/m4/attributes.m4
index 7e080da65d..aa53ef2380 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],