diff options
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/acattribute.m4 | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/m4/acattribute.m4 b/m4/acattribute.m4 new file mode 100644 index 000000000..7b490d4b7 --- /dev/null +++ b/m4/acattribute.m4 @@ -0,0 +1,25 @@ +dnl modified AC_C_INLINE from autoconf/c.m4 + +AN_IDENTIFIER([attribute], [AC_C_ATTRIBUTE]) +AC_DEFUN([AC_C_ATTRIBUTE], +[AC_CACHE_CHECK([for __attribute__], ac_cv_c_attribute, +[ +AC_COMPILE_IFELSE([AC_LANG_SOURCE( +[void foo(void) __attribute__ ((__noreturn__));] +)], +[ac_cv_c_attribute=yes], +[ac_cv_c_attribute=no] +) +]) +AH_VERBATIM([attribute], +[/* Define to `__attribute__' to nothing if it's not supported. */ +#undef __attribute__]) +case $ac_cv_c_attribute in + yes) ;; + no) + cat >>confdefs.h <<_ACEOF +#define __attribute__(x) /* nothing */ +_ACEOF + ;; +esac +])# AC_C_ATTRIBUTE |