Hi I'm trying to build lxml 0.6 using gcc 4.0: $ gcc --version gcc (GCC) 4.0.1 20050604 (prerelease) (Debian 4.0.0-8ubuntu3) Copyright (C) 2005 Free Software Foundation, Inc. The compilation fails with the following result: python2.4 setup.py build_ext -i running build_ext building 'lxml.etree' extension creating build creating build/temp.linux-i686-2.4 creating build/temp.linux-i686-2.4/src creating build/temp.linux-i686-2.4/src/lxml gcc -pthread -fno-strict-aliasing -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -fPIC -I/usr/include/libxml2 -I/usr/include/python2.4 -c src/lxml/etree.c -o build/temp.linux-i686-2.4/src/lxml/etree.o -w src/lxml/etree.c: In function '__pyx_f_5etree__elementFactory': src/lxml/etree.c:3008: error: invalid lvalue in assignment src/lxml/etree.c: In function '__pyx_f_5etree__commentFactory': src/lxml/etree.c:3385: error: invalid lvalue in assignment src/lxml/etree.c: In function '__pyx_f_5etree__attribFactory': src/lxml/etree.c:4228: error: invalid lvalue in assignment src/lxml/etree.c: In function '__pyx_f_5etree__attribIteratorFactory': src/lxml/etree.c:4365: error: invalid lvalue in assignment src/lxml/etree.c: In function '__pyx_f_5etree__elementIteratorFactory': src/lxml/etree.c:4501: error: invalid lvalue in assignment src/lxml/etree.c: In function '__pyx_f_5etree_14XPathEvaluator___init__': src/lxml/etree.c:5494: error: invalid lvalue in assignment src/lxml/etree.c: In function '__pyx_f_5etree_changeDocumentBelow': src/lxml/etree.c:9110: error: invalid lvalue in assignment error: command 'gcc' failed with exit status 1 make: *** [inplace] Error 1 Any suggestions? :) It might be a question to pyrex developers though. Kind Regards -- Misha SysInfo: python2.4 2.4.1-1ubuntu2 python2.4-pyrex 0.9.3-1ubuntu5