-#ifndef CCAN_COMPILER
-#define CCAN_COMPILER "cc"
-#endif
-#ifndef CCAN_CFLAGS
-#define CCAN_CFLAGS "-g -Wall -Wundef -Wmissing-prototypes -Wmissing-declarations -Wstrict-prototypes -Wold-style-definition -Werror"
-#endif
+/* These are the defaults. */
+#define DEFAULT_CCAN_COMPILER "cc"
+#define DEFAULT_CCAN_CFLAGS "-g"