--- makefile.orig	2008-06-06 15:00:46.000000000 +0200
+++ makefile	2009-01-12 21:12:48.000000000 +0100
@@ -9,13 +9,13 @@
     ifneq (,$(findstring darwin,$(OSTYPE)))
       OS_CCDEFS = -D_GNU_SOURCE
     else
-      OS_CCDEFS = -lrt -lm -D_GNU_SOURCE
+      OS_CCDEFS = -lm -D_GNU_SOURCE
     endif
   endif
-  CC = gcc -std=c99 -U__STRICT_ANSI__ -g $(OS_CCDEFS) -I .
+  CC += ${CFLAGS} $(OS_CCDEFS) -I .
   ifeq ($(USE_NETWORK),)
   else
-    NETWORK_OPT = -DUSE_NETWORK -isystem /usr/local/include /usr/local/lib/libpcap.a
+    NETWORK_OPT = -DUSE_NETWORK -lpcap
   endif
 else
   #Win32 Environments