/* Check that config.h is #included before system headers
(this works only for glibc, but that should be enough). */
-#if defined(__GLIBC__)
+#if defined(__GLIBC__) && !defined(__FreeBSD_kernel__) && !defined(__CONFIG_H__)
# error config.h must be #included before system headers
#endif
+#define __CONFIG_H__ 1
/* Define to one of `_getb67', `GETB67', `getb67' for Cray-2 and Cray-YMP
systems. This function is required for `alloca.c' support on those systems.