The current RC_1_31_0 branch, after locally removing the is_abstract include from boost/type_traits.hpp, does not work with the most current gcc-3_4_branch. The combination of RC_1_31_0 and gcc 3.4 was working when I checked the last time three weeks ago. I will submit a gcc bug report later today. However, it is not a given that the gcc people will fix the ICE before their release. Therefore I'd like to find out if a simple rearrangement of the boost code is sufficient to work around the gcc ICE. This approach has worked many times in the past. I'll try to work on this later today. Ralf g++ -fPIC -ftemplate-depth-120 -w -DNDEBUG -O3 -DBOOST_PYTHON_MAX_BASES=2 -DBOOST_PYTHON_SOURCE -I/net/worm/scratch1/rwgk/rc1310/boost -I/usr/include/python2.2 -c -o boost/libs/python/src/dict.os /net/worm/scratch1/rwgk/rc1310/boost/libs/python/src/dict.cpp In file included from /net/worm/scratch1/rwgk/rc1310/boost/boost/mpl/advance.hpp:20, from /net/worm/scratch1/rwgk/rc1310/boost/boost/mpl/aux_/at_impl.hpp:21, from /net/worm/scratch1/rwgk/rc1310/boost/boost/mpl/at.hpp:22, from /net/worm/scratch1/rwgk/rc1310/boost/boost/python/detail/signature.hpp:20, from /net/worm/scratch1/rwgk/rc1310/boost/boost/python/detail/caller.hpp:16, from /net/worm/scratch1/rwgk/rc1310/boost/boost/python/object/function_handle.hpp:9, from /net/worm/scratch1/rwgk/rc1310/boost/boost/python/converter/arg_to_python.hpp:20, from /net/worm/scratch1/rwgk/rc1310/boost/boost/python/call.hpp:16, from /net/worm/scratch1/rwgk/rc1310/boost/boost/python/object_core.hpp:13, from /net/worm/scratch1/rwgk/rc1310/boost/boost/python/object.hpp:10, from /net/worm/scratch1/rwgk/rc1310/boost/boost/python/dict.hpp:11, from /net/worm/scratch1/rwgk/rc1310/boost/libs/python/src/dict.cpp:1: /net/worm/scratch1/rwgk/rc1310/boost/boost/mpl/negate.hpp:38: internal compiler error: in uses_template_parms, at cp/pt.c:4748 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it! http://webhosting.yahoo.com/ps/sb/