A bunch of defined(__GLIBC__) added. static-linking warning expanded
diff --git a/networking/libiproute/ll_proto.c b/networking/libiproute/ll_proto.c
index a3fe9d3..20f26ca 100644
--- a/networking/libiproute/ll_proto.c
+++ b/networking/libiproute/ll_proto.c
@@ -11,12 +11,11 @@
  */
 
 #include "libbb.h"
-#include <string.h>
 
 #include "rt_names.h"
 #include "utils.h"
 
-#if __GLIBC__ >=2 && __GLIBC_MINOR__ >= 1
+#if defined(__GLIBC__) && __GLIBC__ >=2 && __GLIBC_MINOR__ >= 1
 #include <net/ethernet.h>
 #else
 #include <linux/if_ether.h>