On Fri, Dave Abrahams wrote:

Of course, we still have the GPL problem if we link to that :(

No more so than any other part of GNU libstdc++. The function is mandated the "multi vendor ABI standard." This facility's documentation states that it is licensed under the same terms as the rest of GNU libstdc++. It seems to me that you should have no issues with using these functions in Boost.Python. HTH, -Jonathan

From cxxabi.h (leading //es removed for plain text email):

As a special exception, you may use this file as part of a free software library without restriction. Specifically, if other files instantiate templates or use macros or inline functions from this file, or you compile this file and link it with other files to produce an executable, this file does not by itself cause the resulting executable to be covered by the GNU General Public License. This exception does not however invalidate any other reasons why the executable file might be covered by the GNU General Public License. From http://gcc.gnu.org/onlinedocs/libstdc++/libstdc++-html-USERS-3.3/namespaceab...: (Brief description of abi::__cxa_demangle()) New ABI-mandated entry point in the C++ runtime library for demangling. ( A note at the bottom) The same demangling functionality is available via libiberty (<libiberty/demangle.h> and libiberty.a) in GCC 3.1 and later, but that requires explicit installation (--enable-install-libiberty) and uses a different API, although the ABI is unchanged.

From the draft IA64 ABI docs: http://www.codesourcery.com/cxx-abi/abi.html#demangler