--- a/Makefile	2017-11-24 16:21:17.003925954 +0100
+++ b/Makefile	2017-11-24 16:23:28.944774814 +0100
@@ -18,9 +18,9 @@
 CC=gcc
 AR=ar
 RANLIB=ranlib
-LDFLAGS=
+override LDFLAGS += $(DEFAULT_LDFLAGS_APPL)
 
-override CFLAGS += -Wall
+override CFLAGS += -Wall $(DEFAULT_CFLAGS_SRC)
 
 # Where you want it installed when you do 'make install'
 PREFIX=/usr/local

--- ./Makefile-libbz2_so.orig	2017-12-01 12:45:39.385233416 +0100
+++ ./Makefile-libbz2_so	2017-12-01 12:48:05.949020606 +0100
@@ -23,7 +23,7 @@
 
 SHELL=/bin/sh
 CC=gcc
-override CFLAGS += -fpic -fPIC -Wall
+override CFLAGS += -fpic -fPIC -Wall $(DEFAULT_CFLAGS_LIB)
 
 OBJS= blocksort.sho  \
       huffman.sho    \
@@ -34,8 +34,8 @@
       bzlib.sho
 
 all: $(OBJS)
-	$(CC) -shared -Wl,-soname -Wl,libbz2.so.1.0 -o libbz2.so.1.0.7 $(OBJS)
-	$(CC) $(CFLAGS) -o bzip2-shared bzip2.c libbz2.so.1.0.7
+	$(CC) $(DEFAULT_LDFLAGS_LIB) -shared -Wl,-soname -Wl,libbz2.so.1.0 -o libbz2.so.1.0.7 $(OBJS)
+	$(CC) $(DEFAULT_CFLAGS_SRC) $(DEFAULT_LDFLAGS_APPL) -o bzip2-shared bzip2.c libbz2.so.1.0.7
 
 install:
 	install -m 0755 -D libbz2.so.1.0.7 $(PREFIX)/lib/libbz2.so.1.0.7