This patch copied/pasted from this link:
http://git.gnome.org/browse/libxml2/commit/?id=38af74f7b18af17097c1888bc4c96ab6a30e3bdf
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From 38af74f7b18af17097c1888bc4c96ab6a30e3bdf Mon Sep 17 00:00:00 2001
From: Paul Smith <[email protected]>
Date: Mon, 15 Mar 2010 09:22:25 +0000
Subject: fix build error in libxml2/python

There are missing $(srcdir) values in libxml2/python/Makefile.am which
cause it to fail if built remote from out of tree.
---
diff --git a/python/Makefile.am b/python/Makefile.am
index 8f148b1..3cf87e7 100644
--- a/python/Makefile.am
+++ b/python/Makefile.am
@@ -29,11 +29,11 @@ mylibs = \
 
 python_LTLIBRARIES = libxml2mod.la
 
-libxml2mod_la_SOURCES = libxml.c types.c
+libxml2mod_la_SOURCES = $(srcdir)/libxml.c $(srcdir)/types.c
 nodist_libxml2mod_la_SOURCES = libxml2-py.c
 libxml2mod_la_LIBADD = $(mylibs) @CYGWIN_EXTRA_PYTHON_LIBADD@ @PYTHON_LIBS@
 
-libxml.c: libxml2-py.h # to generate before to compile
+$(srcdir)/libxml.c: libxml2-py.h # to generate before to compile
 
 
 libxml2.py: $(srcdir)/libxml.py libxml2class.py
--
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