Hijack SDL2 and GLEW include and library when compiling to javascript emscripten already provides the SDL2 suite and will simply ignore missing libraries.

+
−[patterns]
+
−**.h = native
+
−**.c = native
+
−**.cpp = native
+
−**.lua = native
+
−**.txt = native
+
−**.pas = native
+
−**.inc = native
+
−**.hs = native