diff -upk.orig bzip2-1.0.4.orig/Makefile.am bzip2-1.0.4/Makefile.am
--- bzip2-1.0.4.orig/Makefile.am	2005-04-09 22:29:21 +0000
+++ bzip2-1.0.4/Makefile.am	2007-01-10 16:35:20 +0000
@@ -21,7 +21,11 @@ libbz2_la_SOURCES = \
 	compress.c \
 	decompress.c \
 	bzlib.c
-libbz2_la_LDFLAGS = -version-info 1:3:0
+libbz2_la_LDFLAGS = -version-info 1:3:0 -Wl,--version-script=libbz2.map
+libbz2_la_DEPENDENCIES = libbz2.map
+
+libbz2.map: libbz2.map.sh
+	sh $^ >$@
 
 check-local: samples.sh bzip2
 	./samples.sh
diff -upk.orig bzip2-1.0.4.orig/libbz2.map.sh bzip2-1.0.4/libbz2.map.sh
--- bzip2-1.0.4.orig/libbz2.map.sh	1970-01-01 00:00:00 +0000
+++ bzip2-1.0.4/libbz2.map.sh	2005-04-09 22:29:21 +0000
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+cat <<__EOF__
+
+BZLIB_1.0 {
+  global:
+$(sed -ne 's/^BZ_EXTERN .*BZ_API(\([^)]\+\)).*/    \1;/pg' bzlib.h)
+  local:
+    *;
+};
+__EOF__