--- config/config.h
+++ config/config.h
@@ -0,0 +1,11 @@
+#include <endian.h>
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define config_endian 1
+#elif __BYTE_ORDER == __BIG_ENDIAN
+#define config_endian 0
+#else
+#error unsupported byte order!
+#endif
+#define config_strdup 1
+#define config_socklen_t 1
+#define config_gethostname 1