go-gl/glfw3 — pull request #81 by jsilvela (2014-08-14 16:00:43+00:00)
Title: Added compiler flags for darwin to locate GLFW

The GLFW/ include path wasn't being found.
I had installed (avoiding brew) the library on /usr/local
OS X 10.9.4
gcc 4.2.1
Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)