X-Git-Url: http://git.ozlabs.org/?a=blobdiff_plain;f=ccan%2Fcast%2Ftest%2Fcompile_fail-cast_const3.c;h=ac7462c58e2cd7f244225980733b40df3a03f375;hb=5877402640cff05f779b23a730e4cc62d729113f;hp=6232c863db040e9ad6e23b2e3a6ac8acad54af97;hpb=118ace351b789dfaca8866f84a8cd4b924941268;p=ccan

diff --git a/ccan/cast/test/compile_fail-cast_const3.c b/ccan/cast/test/compile_fail-cast_const3.c
index 6232c863..ac7462c5 100644
--- a/ccan/cast/test/compile_fail-cast_const3.c
+++ b/ccan/cast/test/compile_fail-cast_const3.c
@@ -1,17 +1,29 @@
 #include <ccan/cast/cast.h>
 #include <stdlib.h>
 
-int main(int argc, char *argv[])
+/* Note: this *isn't* sizeof(char) on all platforms. */
+struct char_struct {
+	char c;
+};
+
+int main(void)
 {
 	char ***uc;
-	const 
+	const
 #ifdef FAIL
-		int
+		struct char_struct
 #else
 		char
 #endif
 		***p = NULL;
 
 	uc = cast_const3(char ***, p);
+	(void) uc; /* Suppress unused-but-set-variable warning. */
 	return 0;
 }
+
+#ifdef FAIL
+#if !HAVE_TYPEOF||!HAVE_BUILTIN_CHOOSE_EXPR||!HAVE_BUILTIN_TYPES_COMPATIBLE_P
+#error "Unfortunately we don't fail if cast_const can only use size"
+#endif
+#endif