--- a/make/suncc.mk	Tue Jan 01 14:02:25 2013 +0100
+++ b/make/suncc.mk	Tue Jan 01 19:22:56 2013 +0100
@@ -1,7 +1,7 @@
 #
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 #
-# Copyright 2012 Olaf Wintermann. All rights reserved.
+# Copyright 2013 Olaf Wintermann. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are met:
@@ -26,7 +26,7 @@
 # POSSIBILITY OF SUCH DAMAGE.
 #
 
-CFLAGS = -xc99
+CFLAGS = -xc99 -D_REENTRANT
 
 CC  = cc
 CXX = CC