Building on OSX Mojave

[csantosbh]

I just needed to change my mkglcall_osx.m to the following:

## FreeGLUT and GLEW from Homebrew
mkoctfile -v --mex -Wall -Wextra  -framework OpenGL -I/usr/local/include -L/usr/local/lib -lGLEW -lglut  glcall.c

[helixhorned]

Hello! Glad that there is someone who potentially finds this project useful :).
I wrote it in my student times and since then have not maintained it though.
So, great that it worked almost out of the box even after all the time for you.
Looking at the change, yes, seems totally reasonable to me to pass -framework OpenGL instead of the bunch of libraries by hand.
Thanks for giving notice! I may integrate it at some future time when I have the chance and motivation to use gleemex myself again.