Allow sdl2-sys to build for windows-gnu target #763
Merged
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Had to make a few small changes to the sdl2-sys build.rs to get linux-windows cross compilation working on my machine.
I'm not sure if outright disabling the GLES subsystem is acceptable but I know that by default, mingw doesn't come with GLES or EGL headers. So if you try building SDL from source without disabling it, it fails.
I noticed that SDL can provide it's own GLES headers but as far as I could tell they're only used if _MSC_VER is defined, and I figured defining that for a non-msvc target might be a bad idea.