--- bzip2-1.0.6.orig/Makefile-libbz2_so	2010-09-11 01:07:52.000000000 +0200
+++ bzip2-1.0.6/Makefile-libbz2_so	2014-01-13 14:31:10.000000000 +0100
@@ -21,10 +21,17 @@
 # ------------------------------------------------------------------
 
 
-SHELL=/bin/sh
-CC=gcc
+SHELL?=/bin/sh
+CC?=gcc
 BIGFILES=-D_FILE_OFFSET_BITS=64
-CFLAGS=-fpic -fPIC -Wall -Winline -O2 -g $(BIGFILES)
+CFLAGS?=
+CFLAGS+=-fpic -fPIC -Wall -Winline $(BIGFILES)
+OS=$(shell uname)
+ifeq ($(OS),Darwin)
+LDOPT=-install_name
+else 
+LDOPT=-soname
+endif
 
 OBJS= blocksort.o  \
       huffman.o    \
@@ -35,7 +42,7 @@ OBJS= blocksort.o  \
       bzlib.o
 
 all: $(OBJS)
-	$(CC) -shared -Wl,-soname -Wl,libbz2.so.1.0 -o libbz2.so.1.0.6 $(OBJS)
+	$(CC) -shared -Wl,$(LDOPT) -Wl,libbz2.so.1.0 -o libbz2.so.1.0.6 $(OBJS)
 	$(CC) $(CFLAGS) -o bzip2-shared bzip2.c libbz2.so.1.0.6
 	rm -f libbz2.so.1.0
 	ln -s libbz2.so.1.0.6 libbz2.so.1.0