Also correct _POSIX2_* constants in case older standards are selected.

diff --git a/ChangeLog b/ChangeLog
index 280afff..a42e20b 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,7 +1,7 @@
 2009-08-23  Ulrich Drepper  <drepper@redhat.com>
 
-       * posix/unistd.h: Define _POSIX_VERSION correctly if older POSIX
-       versions are selected.
+       * posix/unistd.h: Define _POSIX_VERSION and _POSIX2_* correctly if
+       older POSIX versions are selected.
 
        * stdio-common/printf_fp.c: ISO C expects to print the sign of NaN
        as well.

diff --git a/posix/unistd.h b/posix/unistd.h
index 2de9a68..d9ecb5e 100644 (file)
--- a/posix/unistd.h
+++ b/posix/unistd.h
@@ -50,24 +50,38 @@ __BEGIN_DECLS
 /* These are not #ifdef __USE_POSIX2 because they are
    in the theoretically application-owned namespace.  */
 
+#ifdef __USE_XOPEN2K8
+# define __POSIX2_THIS_VERSION 200809L
+/* The utilities on GNU systems also correspond to this version.  */
+#elif defined __USE_XOPEN2K
+/* The utilities on GNU systems also correspond to this version.  */
+# define __POSIX2_THIS_VERSION 200112L
+#elif defined __USE_POSIX199506
+/* The utilities on GNU systems also correspond to this version.  */
+# define __POSIX2_THIS_VERSION 199506L
+#else
+/* The utilities on GNU systems also correspond to this version.  */
+# define __POSIX2_THIS_VERSION 199209L
+#endif
+
 /* The utilities on GNU systems also correspond to this version.  */
-#define _POSIX2_VERSION        200809L
+#define _POSIX2_VERSION        __POSIX2_THIS_VERSION
 
 /* If defined, the implementation supports the
    C Language Bindings Option.  */
-#define        _POSIX2_C_BIND  200809L
+#define        _POSIX2_C_BIND  __POSIX2_THIS_VERSION
 
 /* If defined, the implementation supports the
    C Language Development Utilities Option.  */
-#define        _POSIX2_C_DEV   200809L
+#define        _POSIX2_C_DEV   __POSIX2_THIS_VERSION
 
 /* If defined, the implementation supports the
    Software Development Utilities Option.  */
-#define        _POSIX2_SW_DEV  200809L
+#define        _POSIX2_SW_DEV  __POSIX2_THIS_VERSION
 
 /* If defined, the implementation supports the
    creation of locales with the localedef utility.  */
-#define _POSIX2_LOCALEDEF       200809L
+#define _POSIX2_LOCALEDEF       __POSIX2_THIS_VERSION
 
 /* X/Open version number to which the library conforms.  It is selectable.  */
 #ifdef __USE_XOPEN2K8