diff options
Diffstat (limited to 'm4/c_attribute.m4')
| -rw-r--r-- | m4/c_attribute.m4 | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/m4/c_attribute.m4 b/m4/c_attribute.m4 new file mode 100644 index 00000000..48aa6223 --- /dev/null +++ b/m4/c_attribute.m4 @@ -0,0 +1,18 @@ +# +# Check for supported __attribute__ features +# +# AC_C_ATTRIBUTE(FEATURE, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) +# +AC_DEFUN([AC_C_ATTRIBUTE], +[AS_VAR_PUSHDEF([CACHEVAR], [ax_cv_c_attribute_$1])dnl +AC_CACHE_CHECK([for __attribute__ (($1))], + CACHEVAR,[ + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], + [[ void foo(void) __attribute__ (($1)); ]])], + [AS_VAR_SET(CACHEVAR, [yes])], + [AS_VAR_SET(CACHEVAR, [no])])]) +AS_VAR_IF(CACHEVAR,yes, + [m4_default([$2], :)], + [m4_default([$3], :)]) +AS_VAR_POPDEF([CACHEVAR])dnl +])dnl |