Even the problems reported by -pedantic are not necessarily real problems. For example, it's a huge pain to use long long with -pedantic, even though all uses in boost should be protected by #ifdefs.
The problem is that long long is still present and perfectly usable with -pedantic: you just get tons of warnings. However, we do have the machinery to fix these warnings: Boost.Math should compile and test cleanly with -pedantic (or /W4 with MSVC) in spite of extensive long long usage, and even the pesky integer_traits.hpp is clean now in Trunk, albeit with a gcc-specific hack. That gives the user the option to use long long or not in their code and still see these warnings if they want them, without getting swamped from page after page of template instantiations from Boost. John.