try fetching metal-cpp

Author: briaguya-ai

cmake/dependencies/ios.cmake

@@ -69,13 +69,22 @@ if (NOT ${libzip_FOUND})
     list(APPEND ADDITIONAL_LIB_INCLUDES ${libzip_SOURCE_DIR}/lib ${libzip_BINARY_DIR})
 endif()
 
+#=================== Metal-cpp ===================
+FetchContent_Declare(
+    metalcpp
+    GIT_REPOSITORY https://github.com/briaguya-ai/single-header-metal-cpp.git
+    GIT_TAG origin/metal-cpp_macOS12_iOS15
+)
+FetchContent_MakeAvailable(metalcpp)
+list(APPEND ADDITIONAL_LIB_INCLUDES ${metalcpp_SOURCE_DIR})
+
 #=================== ImGui ===================
 target_sources(ImGui
     PRIVATE
     ${imgui_SOURCE_DIR}/backends/imgui_impl_metal.mm
 )
 
-target_include_directories(ImGui PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/extern/metal-cpp)
+target_include_directories(ImGui PRIVATE ${metalcpp_SOURCE_DIR})
 target_compile_definitions(ImGui PUBLIC IMGUI_IMPL_METAL_CPP)
 
 target_link_libraries(ImGui PUBLIC SDL2::SDL2-static SDL2::SDL2main)

cmake/dependencies/mac.cmake

@@ -14,13 +14,22 @@ if (NOT ${spdlog_FOUND})
     FetchContent_MakeAvailable(spdlog)
 endif()
 
+#=================== Metal-cpp ===================
+FetchContent_Declare(
+    metalcpp
+    GIT_REPOSITORY https://github.com/briaguya-ai/single-header-metal-cpp.git
+    GIT_TAG origin/metal-cpp_macOS12_iOS15
+)
+FetchContent_MakeAvailable(metalcpp)
+list(APPEND ADDITIONAL_LIB_INCLUDES ${metalcpp_SOURCE_DIR})
+
 #=================== ImGui ===================
 target_sources(ImGui
     PRIVATE
     ${imgui_SOURCE_DIR}/backends/imgui_impl_metal.mm
 )
 
-target_include_directories(ImGui PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/extern/metal-cpp)
+target_include_directories(ImGui PRIVATE ${metalcpp_SOURCE_DIR})
 target_compile_definitions(ImGui PUBLIC IMGUI_IMPL_METAL_CPP)
 
 find_package(SDL2 REQUIRED)

src/CMakeLists.txt

@@ -153,12 +153,6 @@ endif()
 source_group("graphic" FILES ${Source_Files__Graphic})
 target_sources(libultraship PRIVATE ${Source_Files__Graphic})
 
-#=================== metal-cpp ===================
-
-if (CMAKE_SYSTEM_NAME STREQUAL "Darwin" OR CMAKE_SYSTEM_NAME STREQUAL "iOS")
-    target_include_directories(libultraship PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../extern/metal-cpp)
-endif()
-
 #=================== Packages & Includes ===================
 
 target_include_directories(libultraship