diff -up libarchive-2.7.0/Makefile.am.orig libarchive-2.7.0/Makefile.am
--- libarchive-2.7.0/Makefile.am.orig	2009-04-08 09:37:15.000000000 +0200
+++ libarchive-2.7.0/Makefile.am	2009-05-12 14:12:39.000000000 +0200
@@ -23,7 +23,7 @@ DISTCHECK_CONFIGURE_FLAGS = --enable-bsd
 # Especially for early development, we want to be a little
 # aggressive about diagnosing build problems; this can get
 # relaxed somewhat in final shipping versions.
-AM_CFLAGS=-Wall -Werror
+AM_CFLAGS=-Wall
 
 #
 # What to include in the distribution