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-rw-r--r--ChangeLog5
-rw-r--r--posix/unistd.h16
2 files changed, 20 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index 24291eb398..6b574a5af9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2009-08-23  Ulrich Drepper  <drepper@redhat.com>
+
+	* posix/unistd.h: Define _POSIX_VERSION correctly if older POSIX
+	versions are selected.
+
 2009-08-10  SUGIOKA Toshinobu  <sugioka@itonet.co.jp>
 
 	* stdlib/longlong.h [__sh__] (udiv_qrnnd, sub_ddmmss): Add "t" to
diff --git a/posix/unistd.h b/posix/unistd.h
index 24ec74e05e..6f92c250ba 100644
--- a/posix/unistd.h
+++ b/posix/unistd.h
@@ -30,8 +30,22 @@ __BEGIN_DECLS
 /* These may be used to determine what facilities are present at compile time.
    Their values can be obtained at run time from `sysconf'.  */
 
+#ifdef __USE_XOPEN2K8
 /* POSIX Standard approved as ISO/IEC 9945-1 as of September 2008.  */
-#define	_POSIX_VERSION	200809L
+# define _POSIX_VERSION	200809L
+#elif defined __USE_XOPEN2K
+/* POSIX Standard approved as ISO/IEC 9945-1 as of December 2001.  */
+# define _POSIX_VERSION	200112L
+#elif defined __USE_POSIX199506
+/* POSIX Standard approved as ISO/IEC 9945-1 as of June 1995.  */
+# define _POSIX_VERSION	199506L
+#elif defined __USE_POSIX199309
+/* POSIX Standard approved as ISO/IEC 9945-1 as of September 1993.  */
+# define _POSIX_VERSION	199309L
+#else
+/* POSIX Standard approved as ISO/IEC 9945-1 as of September 1990.  */
+# define _POSIX_VERSION	199009L
+#endif
 
 /* These are not #ifdef __USE_POSIX2 because they are
    in the theoretically application-owned namespace.  */