David Abrahams wrote:
on Sun Aug 05 2007, Stefan Seefeld <seefeld-AT-sympatico.ca> wrote:
FWIW, I submitted a patch to SCons providing a python extension module around ucpp (http://pornin.nerim.net/ucpp/) to provide a 'more accurate' C/C++ dependency scanner, long before wave was around.
Does anyone know if ucpp is actually conforming? Until very recently, most preprocessors were badly broken (and maybe most still are). If it conforms, it would be interesting to benchmark it against Wave.
Wave probably will be slower than ucpp. Several reasons: - ucpp is 'cheating' and doesn't do correct preprocessing, which saves it some cycles - Wave never has been written with maximum performance in mind, even if a lot of effort has been invested recently to make it performant (if compared to gcc's preprocessor Wave is on average still 3 times slower) - Wave does more than pure preprocessing: it does C++ lexing, which adds some overhead OTOH, a real usecase in the Boost build system is a fine motivation and benchmark allowing to optimize Wave further. Regards Hartmut