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-rw-r--r--features.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/features.h b/features.h
index 7801bb8..1249bb5 100644
--- a/features.h
+++ b/features.h
@@ -45,6 +45,7 @@ Cambridge, MA 02139, USA. */
__USE_SVID Define SVID things.
__USE_MISC Define things common to BSD and System V Unix.
__USE_GNU Define GNU extensions.
+ __USE_REENTRANT Define reentrant/thread-safe *_r functions.
__FAVOR_BSD Favor 4.3BSD things in cases of conflict.
The macro `__GNU_LIBRARY__' is defined by this file unconditionally.
@@ -64,6 +65,7 @@ Cambridge, MA 02139, USA. */
#undef __USE_SVID
#undef __USE_MISC
#undef __USE_GNU
+#undef __USE_REENTRANT
#undef __FAVOR_BSD
@@ -125,6 +127,10 @@ Cambridge, MA 02139, USA. */
#define __USE_GNU 1
#endif
+#if defined (__USE_GNU) || defined (__USE_MISC)
+#define __USE_REENTRANT 1
+#endif
+
/* This macro indicates that the installed library is the GNU C Library.
Its value must be incremented whenever any existing library interface