padlab/CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
project(padlab C)
set(TARGET padlab)

set(GFX_BACKEND "OPENGL_LEGACY" CACHE STRING "Graphics API to render with: \"SDL\", \"OPENGL_LEGACY\" 1.1 compatibility profile, \"OPENGL\" 3.3 core profile (WIP), \"METAL\"")

set(GL_BACKENDS OPENGL_LEGACY OPENGL)
set(BACKENDS SDL ${GL_BACKENDS} METAL)
if (NOT GFX_BACKEND IN_LIST BACKENDS)
	message(FATAL_ERROR "\"${GFX_BACKEND}\" is not a valid graphics backend, GFX_BACKEND may be one of: ${BACKENDS}")
endif()

list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")
set(CMAKE_C_STANDARD 99)
set(GNU_COMPILERS GNU Clang AppleClang)
if (CMAKE_C_COMPILER_ID IN_LIST GNU_COMPILERS)
	set(GNU 1)
elseif (MSVC)
	string(REPLACE "/W3" "/W4" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
endif()

find_package(SDL2 REQUIRED)
if (GFX_BACKEND IN_LIST GL_BACKENDS)
	if (NOT DEFINED OpenGL_GL_PREFERENCE)
		set(OpenGL_GL_PREFERENCE "GLVND")
	endif()
	find_package(OpenGL REQUIRED)
endif()

add_subdirectory(src)