fix static assertion problem for gcc (bug 4022)

diff --git a/src/mesa/shader/slang/slang_utility.h b/src/mesa/shader/slang/slang_utility.h
index 0240385e8d58fe9ab7aaaad830c8a12ab77feb41..2b040a444666e8690a238a1212bb8b1aeb31db10 100644 (file)
--- a/src/mesa/shader/slang/slang_utility.h
+++ b/src/mesa/shader/slang/slang_utility.h
@@ -29,7 +29,10 @@
 extern "C" {\r
 #endif\r
 \r
-#define static_assert(expr) do { int _array[(expr) ? 1 : 0]; _array[0]; } while (0)\r
+/* Compile-time assertions.  If the expression is zero, try to declare an\r
+ * array of size [-1] to cause compilation error.\r
+ */\r
+#define static_assert(expr) do { int _array[(expr) ? 1 : -1]; _array[0]; } while (0)\r
 \r
 void slang_alloc_free (void *);\r
 void *slang_alloc_malloc (unsigned int);\r