diff options
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/attributes.m4 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/m4/attributes.m4 b/m4/attributes.m4 index 49f71bddc..3fee49ab5 100644 --- a/m4/attributes.m4 +++ b/m4/attributes.m4 @@ -56,6 +56,21 @@ AC_DEFUN([CC_CHECK_CFLAGS], [ [$2], [$3]) ]) +AC_DEFUN([CC_CHECK_LDFLAGS], [ + AC_CACHE_CHECK([if $CC supports $1 flag], + AS_TR_SH([cc_cv_ldflags_$1]), + [ac_save_LDFLAGS="$LDFLAGS" + LDFLAGS="$LDFLAGS $1" + AC_LINK_IFELSE([int main() { return 1; }], + [eval "AS_TR_SH([cc_cv_ldflags_$1])='yes'"], + [eval "AS_TR_SH([cc_cv_ldflags_$1])="]) + LDFLAGS="$ac_save_LDFLAGS" + ]) + + AS_IF([test x$]AS_TR_SH([cc_cv_ldflags_$1])[ = xyes], + [$2], [$3]) +]) + dnl Check for a -Werror flag or equivalent. -Werror is the GCC dnl and ICC flag that tells the compiler to treat all the warnings dnl as fatal. We usually need this option to make sure that some |