It's fine with C packages these days, it's increasingly rare to find libraries that it won't work with. That said, it has happened often enough I'm cautious ab

It's fine with C packages these days, it's increasingly rare to find libraries that it won't work with. That said, it has happened often enough I'm cautious about where I use it. It would suck to be dependent on pypy's excellent performance, and then find I can't do something due to library incompatibility.