* os_dep.c: Use the POSIX signal API in preference to the BSD API.

[pf3gnuchains/gcc-fork.git] / boehm-gc / os_dep.c

diff --git a/boehm-gc/os_dep.c b/boehm-gc/os_dep.c
index 3f0f20e..6f1e81a 100644 (file)
--- a/boehm-gc/os_dep.c
+++ b/boehm-gc/os_dep.c
@@ -501,7 +501,13 @@ void GC_enable_signals(void)
       && !defined(MACOS) && !defined(DJGPP) && !defined(DOS4GW) \
       && !defined(NOSYS) && !defined(ECOS)
 
-#   if defined(sigmask) && !defined(UTS4) && !defined(HURD)
+#   if defined(SIG_BLOCK)
+       /* Use POSIX/SYSV interface */
+#      define SIGSET_T sigset_t
+#      define SIG_DEL(set, signal) sigdelset(&(set), (signal))
+#      define SIG_FILL(set) sigfillset(&set)
+#      define SIGSETMASK(old, new) sigprocmask(SIG_SETMASK, &(new), &(old))
+#   elif defined(sigmask) && !defined(UTS4) && !defined(HURD)
        /* Use the traditional BSD interface */
 #      define SIGSET_T int
 #      define SIG_DEL(set, signal) (set) &= ~(sigmask(signal))
@@ -511,11 +517,7 @@ void GC_enable_signals(void)
          /* a signal 32.                                               */
 #      define SIGSETMASK(old, new) (old) = sigsetmask(new)
 #   else
-       /* Use POSIX/SYSV interface     */
-#      define SIGSET_T sigset_t
-#      define SIG_DEL(set, signal) sigdelset(&(set), (signal))
-#      define SIG_FILL(set) sigfillset(&set)
-#      define SIGSETMASK(old, new) sigprocmask(SIG_SETMASK, &(new), &(old))
+#       error undetectable signal API
 #   endif
 
 static GC_bool mask_initialized = FALSE;