Define _XOPEN_LEGACY. Explain _XOPEN_REALTIME and

_XOPEN_REALTIME_THREADS.  Include bits/environments.h.

diff --git a/posix/unistd.h b/posix/unistd.h
index f14e02d..2fbdae5 100644 (file)
--- a/posix/unistd.h
+++ b/posix/unistd.h
@@ -77,6 +77,9 @@ __BEGIN_DECLS
    are present.  */
 #define        _XOPEN_ENH_I18N 1
 
    are present.  */
 #define        _XOPEN_ENH_I18N 1
 

+/* The legacy interfaces are also available.  */
+#define _XOPEN_LEGACY  1
+

 
 /* Get values of POSIX options:
 
 
 /* Get values of POSIX options:
 


@@ -122,6 +125,8 @@ __BEGIN_DECLS
    _POSIX_POLL                 Implementation supports `poll' function.
    _POSIX_SELECT               Implementation supports `select' and `pselect'.
 
    _POSIX_POLL                 Implementation supports `poll' function.
    _POSIX_SELECT               Implementation supports `select' and `pselect'.
 

+   _XOPEN_REALTIME             X/Open realtime support is available.
+   _XOPEN_REALTIME_THREADS     X/Open realtime thread support is available.

    _XOPEN_SHM                  Shared memory interface according to XPG4.2.
 
    _XBS5_ILP32_OFF32           Implementation provides environment with 32-bit
    _XOPEN_SHM                  Shared memory interface according to XPG4.2.
 
    _XBS5_ILP32_OFF32           Implementation provides environment with 32-bit


@@ -162,6 +167,10 @@ __BEGIN_DECLS
 
 #include <bits/posix_opt.h>
 
 
 #include <bits/posix_opt.h>
 

+/* Get the environment definitions from Unix98.  */
+#ifdef __USE_UNIX98
+# include <bits/environments.h>
+#endif

 
 /* Standard file descriptors.  */
 #define        STDIN_FILENO    0       /* Standard input.  */
 
 /* Standard file descriptors.  */
 #define        STDIN_FILENO    0       /* Standard input.  */