add mgl library

Author: malytomas

.gitignore

@@ -1,14 +1,6 @@
 config.mk
 build/
 libmgl.dylib
-external/glfw/src/MGLContext.h
-external/glfw/src/MGLRenderer.h
-external/OpenGL-Registry/
-external/SPIRV-Cross/
-external/SPIRV-Headers/
-external/SPIRV-Tools/
-external/ezxml/
-external/glslang/
 *.DS_Store
 /SPIRV-Headers
 /SPIRV-Cross

.gitmodules

@@ -0,0 +1,6 @@
+[submodule "external/glslang"]
+	path = external/glslang
+	url = https://github.com/KhronosGroup/glslang.git
+[submodule "external/SPIRV-Cross"]
+	path = external/SPIRV-Cross
+	url = https://github.com/r58Playz/SPIRV-Cross.git

CMakeLists.txt

@@ -1,10 +1,17 @@
-cmake_minimum_required(VERSION 3.15)
+cmake_minimum_required(VERSION 3.31)
 project(MGL LANGUAGES C CXX OBJC)
 
-execute_process(COMMAND "bash" "build_external.sh" WORKING_DIRECTORY "${CMAKE_CURRENT_LIST_DIR}/external" COMMAND_ECHO STDOUT)
+execute_process(COMMAND "python3" "update_glslang_sources.py" WORKING_DIRECTORY "${CMAKE_CURRENT_LIST_DIR}/external/glslang" COMMAND_ECHO STDOUT)
 
+set(CMAKE_SKIP_INSTALL_RULES TRUE) # disable installs
+set(CMAKE_POLICY_VERSION_MINIMUM 3.31) # override cmake minimum version for dependencies
 set(CMAKE_C_STANDARD 17)
 set(CMAKE_CXX_STANDARD 20)
+set(ENABLE_OPT ON) # use spirv-tools inside glslang
+
+add_subdirectory(external/SPIRV-Cross)
+add_subdirectory(external/glslang)
+add_subdirectory(external/glfw)
 
 include_directories(
 	MGL/SPIRV/SPIRV-Cross
@@ -60,14 +67,7 @@ target_link_libraries(mgl PUBLIC
 )
 
 if(MGL_BUILD_TEST)
-	add_library(glfw-imp STATIC IMPORTED)
-	set_target_properties(glfw-imp PROPERTIES IMPORTED_LOCATION "${CMAKE_CURRENT_SOURCE_DIR}/external/glfw/build/src/libglfw3.a")
-
-	add_library(glfw INTERFACE)
-	target_link_libraries(glfw INTERFACE glfw-imp mgl)
-	target_include_directories(glfw INTERFACE "external/glfw/include")
-
-	add_dependencies(glfw mgl)
+	target_link_libraries(glfw INTERFACE mgl)
 
 	add_library(glm INTERFACE)
 	target_include_directories(glm INTERFACE "mgl/MGL/include")

external/SPIRV-Cross

@@ -0,0 +1 @@
+../../../MGL/include/MGLContext.h

external/build_external.sh

@@ -0,0 +1 @@
+../../../MGL/include/MGLRenderer.h