we're using Boost 1.30.0 with MSVC7.1 on a Win32 platform. Currently where working on a port to a Win64 platform using the MSVC7.1 for IA64 compiler. (13.10.2240.8 for IA64) I just compiled the code as is and unfortunately I encountered errors in boost headers. This probably is because of missing/bad defines for this 'unknown' platform in the config headers... I was wondering if somebody already tried to compile boost on a 64 bit platform, and if he/she succeeded? Or if there are known implementation details which would cause boost 'never' to work on 64 bit platforms?

No it should be fine.

If there are no known 'showstoppers' then I suppose I'll have to go through the Boost Configuration Reference or should I look somewhere else?

First check the output from the config_info program - that will tell you what is being detected at present - plus which config headers are in use. Then try building config_test, and add defines to the config system intil it builds (and let us know the result). Finally try running the Boost regression tests - Boost + VC7.1 currently passes all the tests, so there is no reason why the same should not be true on IA64. There may be some compiler/platform specific fixes in some places that need updating though. John.