X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Fcast%2Ftest%2Fcompile_fail-cast_const3.c;h=f782f9d9ec5d10fc317021179934b17057ae60e0;hp=6232c863db040e9ad6e23b2e3a6ac8acad54af97;hb=4a084a9e956e6e5fec9f9ecb02ca56a79de4a422;hpb=ef54ea44cc261a59bf2d4b5f9898c89da409859d

diff --git a/ccan/cast/test/compile_fail-cast_const3.c b/ccan/cast/test/compile_fail-cast_const3.c
index 6232c863..f782f9d9 100644
--- a/ccan/cast/test/compile_fail-cast_const3.c
+++ b/ccan/cast/test/compile_fail-cast_const3.c
@@ -1,12 +1,17 @@
 #include <ccan/cast/cast.h>
 #include <stdlib.h>
 
+/* Note: this *isn't* sizeof(char) on all platforms. */
+struct char_struct {
+	char c;
+};
+
 int main(int argc, char *argv[])
 {
 	char ***uc;
-	const 
+	const
 #ifdef FAIL
-		int
+		struct char_struct
 #else
 		char
 #endif
@@ -15,3 +20,9 @@ int main(int argc, char *argv[])
 	uc = cast_const3(char ***, p);
 	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