Use config.h rather than passing all defs in CFLAGS
diff --git a/src/libFLAC/format.c b/src/libFLAC/format.c
index 5a61f4c..ae719ba 100644
--- a/src/libFLAC/format.c
+++ b/src/libFLAC/format.c
@@ -23,6 +23,10 @@
 #include "FLAC/format.h"
 #include "private/format.h"
 
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
 #ifdef min
 #undef min
 #endif