- moved the entire OpenGL backend into a separate namespace.

src/gl/shaders/gl_shaderprogram.cpp

@@ -34,6 +34,9 @@
 #include "hwrenderer/utility/hw_shaderpatcher.h"
 #include "w_wad.h"
 
+namespace OpenGLRenderer
+{
+
 FShaderProgram::FShaderProgram()
 {
 	for (int i = 0; i < NumShaderTypes; i++)
@@ -249,3 +252,5 @@ FString FShaderProgram::PatchShader(ShaderType type, const FString &code, const
 
 	return patchedCode;
 }
+
+}