more mips bits-header fixes

[musl] / include / signal.h

diff --git a/include/signal.h b/include/signal.h
index d4856a8..72bffd6 100644 (file)
--- a/include/signal.h
+++ b/include/signal.h
@@ -28,9 +28,11 @@ extern "C" {
 
 #define SIG_HOLD ((void (*)(int)) 2)
 
+#ifndef SIG_BLOCK
 #define SIG_BLOCK     0
 #define SIG_UNBLOCK   1
 #define SIG_SETMASK   2
+#endif
 
 #define SI_ASYNCNL (-60)
 #define SI_TKILL (-6)