--- /dev/null
+#include <ccan/compiler/compiler.h>
+#include <ccan/tap/tap.h>
+
+int main(int argc, char *argv[])
+{
+ plan_tests(2);
+
+ ok1(!IS_COMPILE_CONSTANT(argc));
+#ifdef HAVE_BUILTIN_CONSTANT_P
+ ok1(IS_COMPILE_CONSTANT(7));
+#else
+ pass("If !HAVE_BUILTIN_CONSTANT_P, IS_COMPILE_CONSTANT always false");
+#endif
+ return exit_status();
+}