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| author | David Herrmann <dh.herrmann@gmail.com> | 2013-09-13 12:42:12 +0200 |
|---|---|---|
| committer | Lucas De Marchi <lucas.demarchi@intel.com> | 2015-02-24 22:41:30 -0300 |
| commit | 779729cf535549bfd687227da2385b607cc31a61 (patch) | |
| tree | b6cc239e2e8bfeeb3edca5af0394fff6d39ec546 | |
| parent | c619d8920852c39ea4ec8564b8ba83f1c10898f2 (diff) | |
| download | kmod-779729cf535549bfd687227da2385b607cc31a61.tar.gz | |
from systemd: 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.
| -rw-r--r-- | m4/attributes.m4 | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/m4/attributes.m4 b/m4/attributes.m4 index 104f04c..fad1c8f 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], |