Fix Wundef warning for __STDC_VERSION__
Commit Message
Hi,
c4c4124473c187b5c4642611390897666c3d3970 added the _Noreturn macro for
pre-C11 compilers, but it now throws a new Wundef warning during `make
check` for __STDC_VERSION__ which gcc does not define by default. The
following patch fixes this in line with other uses of __STDC_VERSION__
in the file.
Siddhesh
* misc/sys/cdefs.h: Check if __STDC_VERSION__ is defined
before checking its value.
Comments
> -#if !defined _Noreturn && __STDC_VERSION__ < 201112 && !__GNUC_PREREQ (4,7)
> +#if (!defined _Noreturn && defined __STDC_VERSION__ \
> + && __STDC_VERSION__ < 201112 && !__GNUC_PREREQ (4,7))
I think this wants to be:
#if (!defined _Noreturn \
&& (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) < 201112 \
&& !__GNUC_PREREQ (4,7))
@@ -382,7 +382,8 @@
# define __glibc_likely(cond) (cond)
#endif
-#if !defined _Noreturn && __STDC_VERSION__ < 201112 && !__GNUC_PREREQ (4,7)
+#if (!defined _Noreturn && defined __STDC_VERSION__ \
+ && __STDC_VERSION__ < 201112 && !__GNUC_PREREQ (4,7))
# if __GNUC_PREREQ (2,8)
# define _Noreturn __attribute__ ((__noreturn__))
# else