--- /dev/null
+--- Makefile
++++ Makefile
+@@ -18,10 +18,9 @@
+ CC=gcc
+ AR=ar
+ RANLIB=ranlib
+-LDFLAGS=
+
+ BIGFILES=-D_FILE_OFFSET_BITS=64
+-CFLAGS=-Wall -Winline -O2 -g $(BIGFILES)
++CFLAGS+=-Wall -Winline $(BIGFILES) $(CPPFLAGS)
+
+ # Where you want it installed when you do 'make install'
+ PREFIX=/usr/local
+--- Makefile-libbz2_so
++++ Makefile-libbz2_so
+@@ -24,7 +24,7 @@
+ SHELL=/bin/sh
+ CC=gcc
+ BIGFILES=-D_FILE_OFFSET_BITS=64
+-CFLAGS=-fpic -fPIC -Wall -Winline -O2 -g $(BIGFILES)
++CFLAGS+=-fpic -fPIC -Wall -Winline $(BIGFILES) $(CPPFLAGS)
+
+ OBJS= blocksort.o \
+ huffman.o \