You can also use ccall with absolute library paths. Modifying PATH could work
but is usually asking for trouble. I wouldn't recommend checking in binaries in
the git repo, you'd need to carefully segregate each platform - 32 vs 64 bit,
arm vs x86, linux vs freebsd, etc. It also takes great care to build
precompiled binaries that will work across a wide variety of old and new linux
distributions, even neglecting unusual OS or architecture combinations. Windows
and mac can be somewhat easier but you still need to worry about 32 vs 64 bit
windows, and which compiler you're using, and what minimum osx version you
build against.
