Add thirdparty rendering deps as submodules

.gitignore

@@ -5,5 +5,6 @@ bits/
 cmake-build-*/
 bin/
 build/
+graph/
 
 CMakeUserPresets.json

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "engine/native/thirdparty/bgfx.cmake"]
+	path = engine/native/thirdparty/bgfx.cmake
+	url = https://github.com/bkaradzic/bgfx.cmake

CMakeLists.txt

@@ -8,8 +8,25 @@ elseif (CMAKE_VERSION VERSION_GREATER_EQUAL "4.0.0")
     set(CMAKE_EXPERIMENTAL_CXX_IMPORT_STD "a9e1cf81-9932-4810-974b-6eccaf14e457")
 endif()
 
-project(DraconicEngine LANGUAGES C CXX)
+find_package(Git QUIET)
+
+if(GIT_FOUND AND EXISTS "${CMAKE_SOURCE_DIR}/.git")
+    message(STATUS "Updating submodules...")
+    execute_process(
+        COMMAND ${GIT_EXECUTABLE} submodule update --init --recursive
+        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+        RESULT_VARIABLE GIT_SUBMOD_RESULT
+    )
+
+    if(NOT GIT_SUBMOD_RESULT EQUAL "0")
+        message(FATAL_ERROR "Failed to update submodules. Please run manually.")
+    endif()
+endif()
 
+project(DraconicEngine LANGUAGES C CXX)
+set(CMAKE_CXX_SCAN_FOR_MODULES ON)
+set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+set(CMAKE_CXX_MODULE_STD ON)
 list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake")
 
 include(CTest)

cmake/Compiler.cmake

@@ -15,6 +15,12 @@ else()
     add_compile_definitions(DEBUG)
 endif()
 
+# Force Clang to use libc++
+if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+    add_compile_options(-stdlib=libc++)
+    add_link_options(-stdlib=libc++)
+endif()
+
 if (CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
     if (CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|AMD64")
         # TODO: Make SIMD level configurable or detect at runtime

cmake/Modules.cmake

@@ -7,6 +7,10 @@ set(NATIVE_THIRD_PARTY_DIR "${NATIVE_SOURCE_DIR}/thirdparty")
 if (BUILD_TESTING)
     message(STATUS "Bootstrapping unit tests module boost.ut")
     add_library(boost_ut_main "${NATIVE_THIRD_PARTY_DIR}/boost/ut_main.cpp")
+    set_target_properties(boost_ut_main PROPERTIES 
+        CXX_SCAN_FOR_MODULES ON
+        CXX_EXTENSIONS OFF
+    )
     target_sources(boost_ut_main
         PUBLIC
         FILE_SET CXX_MODULES
@@ -52,6 +56,12 @@ function(add_modules_library)
         message(STATUS "Adding static modules library ${LIB_TARGET}")
         add_library(${LIB_TARGET} STATIC)
     endif()
+
+    set_target_properties(${LIB_TARGET} PROPERTIES 
+        CXX_SCAN_FOR_MODULES ON
+        CXX_EXTENSIONS OFF
+    )
+
     target_compile_features(${LIB_TARGET} PUBLIC cxx_std_23)
     target_include_directories(${LIB_TARGET} PUBLIC ${NATIVE_SOURCE_DIR})
 
@@ -73,6 +83,7 @@ function(add_modules_library)
                 string(PREPEND UNIT_TEST_TARGET "${LIB_TARGET}_")
             endif()
             add_executable(${UNIT_TEST_TARGET} ${UNIT_TEST_FILE})
+            set_target_properties(${UNIT_TEST_TARGET} PROPERTIES CXX_SCAN_FOR_MODULES ON)
             target_compile_features(${UNIT_TEST_TARGET} PUBLIC cxx_std_23)
             target_link_libraries(${UNIT_TEST_TARGET} PRIVATE boost_ut_main ${LIB_TARGET})
             message(STATUS "Unit test ${UNIT_TEST_TARGET}")

engine/native/CMakeLists.txt

@@ -1,4 +1,7 @@
 include(Compiler)
+
+add_subdirectory(thirdparty)
+
 include(Modules)
 
 add_modules_library(core SHARED)

engine/native/thirdparty/CMakeLists.txt

@@ -0,0 +1,17 @@
+set(BGFX_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
+set(BGFX_BUILD_TOOLS OFF CACHE BOOL "" FORCE)
+set(BGFX_INSTALL OFF CACHE BOOL "" FORCE)
+set(CMAKE_CXX_SCAN_FOR_MODULES OFF)
+
+add_subdirectory(bgfx.cmake)
+
+# Prevent module scanning for bgfx & it's deps
+set_target_properties(bgfx PROPERTIES CXX_SCAN_FOR_MODULES OFF)
+
+if(TARGET bx)
+    set_target_properties(bx PROPERTIES CXX_SCAN_FOR_MODULES OFF)
+endif()
+
+if(TARGET bimg)
+    set_target_properties(bimg PROPERTIES CXX_SCAN_FOR_MODULES OFF)
+endif()