diff -Naur libnatpmp-20140401.orig/Makefile libnatpmp-20140401/Makefile
--- libnatpmp-20140401.orig/Makefile	2013-12-09 15:52:28.000000000 -0500
+++ libnatpmp-20140401/Makefile	2014-04-02 10:03:42.128609226 -0400
@@ -5,7 +5,7 @@
 # http://miniupnp.free.fr/libnatpmp.html
 
 OS = $(shell uname -s)
-CC = gcc
+CC ?= gcc
 INSTALL = install -p
 ARCH = $(shell uname -m | sed -e s/i.86/i686/)
 VERSION = $(shell cat VERSION)
@@ -153,19 +153,19 @@
 	$(CC) $(LDFLAGS) -o $@ $^ $(EXTRA_LD)
 
 natpmpc-static:	natpmpc.o $(STATICLIB)
-	$(CC) $(LDFLAGS) -o $@ $^ $(EXTRA_LD)
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(EXTRA_LD)
 
 natpmpc-shared:	natpmpc.o $(SHAREDLIB)
-	$(CC) $(LDFLAGS) -o $@ $^ $(EXTRA_LD)
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(EXTRA_LD)
 
 $(STATICLIB):	$(LIBOBJS)
 	$(AR) crs $@ $?
 
 $(SHAREDLIB):	$(LIBOBJS)
 ifeq ($(OS), Darwin)
-	$(CC) -dynamiclib -Wl,-install_name,$(SONAME) -o $@ $^
+	$(CC) $(CFLAGS) $(LDFLAGS) -dynamiclib -Wl,-install_name,$(SONAME) -o $@ $^
 else
-	$(CC) -shared -Wl,-soname,$(SONAME) -o $@ $^ $(EXTRA_LD)
+	$(CC) $(CFLAGS) $(LDFLAGS) -shared -Wl,-soname,$(SONAME) -o $@ $^ $(EXTRA_LD)
 endif