macro(initialize_build_paths)
	if(NOT BUILD_OS_TYPE OR BUILD_OS_TYPE STREQUAL "")
		message(FATAL_ERROR "Missing os build type (BUILD_OS_TYPE). Please define it!")
	endif()
	if(NOT BUILD_OS_ARCH OR BUILD_OS_ARCH STREQUAL "")
		message(FATAL_ERROR "Missing os build arch (BUILD_OS_ARCH). Please define it!")
	endif()

	# Test for valid values
	if(BUILD_OS_TYPE STREQUAL "win32")
		if(BUILD_OS_ARCH STREQUAL "x86")
			message(FATAL_ERROR "We currently not support windows x86")
		elseif(BUILD_OS_ARCH STREQUAL "amd64")

		else()
			message(FATAL_ERROR "Invalid os build arch (${BUILD_OS_ARCH}). Supported OS archs are: amd64, x86")
		endif()
	elseif(BUILD_OS_TYPE STREQUAL "linux")
		if(BUILD_OS_ARCH STREQUAL "x86")

		elseif(BUILD_OS_ARCH STREQUAL "amd64")

		else()
			message(FATAL_ERROR "Invalid os build arch (${BUILD_OS_ARCH}). Supported OS archs are: amd64, x86")
		endif()
	else()
		message(FATAL_ERROR "Invalid os build type (${BUILD_OS_TYPE}). Supported OS types are: linux, win32")
	endif()

	if(NOT BUILD_OUTPUT OR BUILD_OUTPUT STREQUAL "")
		set(BUILD_OUTPUT "/out/${BUILD_OS_TYPE}_${BUILD_OS_ARCH}")
	endif()
endmacro()
initialize_build_paths()