spawn.h: Fix !_GNU_SOURCE compilation

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

diff --git a/include/spawn.h b/include/spawn.h
index 95fff35..3de375b 100644 (file)
--- a/include/spawn.h
+++ b/include/spawn.h
@@ -66,15 +66,6 @@ typedef struct
 # define POSIX_SPAWN_USEVFORK          0x40
 #endif
 
-
-#define __POSIX_SPAWN_MASK (POSIX_SPAWN_RESETIDS               \
-                           | POSIX_SPAWN_SETPGROUP             \
-                           | POSIX_SPAWN_SETSIGDEF             \
-                           | POSIX_SPAWN_SETSIGMASK            \
-                           | POSIX_SPAWN_SETSCHEDPARAM         \
-                           | POSIX_SPAWN_SETSCHEDULER          \
-                           | POSIX_SPAWN_USEVFORK)
-
 __BEGIN_DECLS
 
 /* Spawn a new process executing PATH with the attributes describes in *ATTRP.
@@ -170,12 +161,27 @@ static inline
 int posix_spawnattr_setflags (posix_spawnattr_t *_attr,
                                     short int __flags)
 {
+#ifdef POSIX_SPAWN_USEVFORK
+# define __POSIX_SPAWN_USEVFORK POSIX_SPAWN_USEVFORK
+#else
+# define __POSIX_SPAWN_USEVFORK 0
+#endif
+#define __POSIX_SPAWN_MASK (POSIX_SPAWN_RESETIDS               \
+                           | POSIX_SPAWN_SETPGROUP             \
+                           | POSIX_SPAWN_SETSIGDEF             \
+                           | POSIX_SPAWN_SETSIGMASK            \
+                           | POSIX_SPAWN_SETSCHEDPARAM         \
+                           | POSIX_SPAWN_SETSCHEDULER          \
+                           | __POSIX_SPAWN_USEVFORK)
+
   /* Check no invalid bits are set.  */
   if (__flags & ~__POSIX_SPAWN_MASK)
     return EINVAL;
 
   _attr->__flags = __flags;
   return 0;
+#undef __POSIX_SPAWN_USEVFORK
+#undef __POSIX_SPAWN_MASK
 }
 
 /* Get process group ID from the attribute structure.  */