Wrapping C-libraries' acquire/release functions with unique_ptr and shared_ptr

This article covers cross-compiling (from scracth) all the necessary libraries for an SDL2 based OpenGL application. In particular: SDL2, SDL2_image (w/png, jpeg), SDL_mixer (w/ogg), SDL_ttf, GLEW

This article talks about how to cross-compile a 64bit windows application from linux, using mingw. This first part covers the necessary tools, and shows a minimal SCons based build system for cross-compiling Hello_World.exe.

A bit specific to my SCons setup and unit-test system, but hopefully still general enough to be useful for someone else. I'll walk through the whole process of setting it up and cleaning it up.