IMHO, using posix_spawn is OK if you know what libc your application is going to be using. If you don't, you may have inconsistent results, and you'll end up h

IMHO, using posix_spawn is OK if you know what libc your application is going to be using. If you don't, you may have inconsistent results, and you'll end up having to sample the various libcs, and probably take the best posix_spawn so your application has consistent behavior. Or you'll have to build in detailed specifications of which libcs and which versions of those libcs you'll work with.