[PATCH] Fix missing timespec definition for sys/stat.h (BZ #21371)

[Adhemerval Zanella]

As indicated by the bug report, the 'struct timespec' definition
is not defined for '_XOPEN_SOURCE=700' and '_POSIX_C_SOURCE=200112L'.

It is because current code only includes its definition if __USE_ATFILE
is defined and the define is only set with:

  1. _GNU_SOURCE and/or _ATFILE_SOURCE definition.
  2. _POSIX_C_SOURCE >= 200809L

However, the 'st_*' fields in 'struct stat' are defined if __USE_XOPEN2K8.
This patch uses the same login for 'struct timespec' inclusion.

Tested on x86_64-linux-gnu.

	* io/sys/stat.h: Use __USE_XOPEN2K8 insteaf of __USE_ATFILE for
	struct timespec definition.
---
 io/sys/stat.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/io/sys/stat.h b/io/sys/stat.h
index 2ada4a5..ac7ef1f 100644
--- a/io/sys/stat.h
+++ b/io/sys/stat.h
@@ -26,7 +26,7 @@
 
 #include <bits/types.h>		/* For __mode_t and __dev_t.  */
 
-#ifdef __USE_ATFILE
+#ifdef __USE_XOPEN2K8
 # include <bits/types/struct_timespec.h>
 #endif
 
-- 
2.7.4