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austinvhuangaustinvhuang
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cherrypick cmake/*.cmake scripts from #16 
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‎cmake/example.cmake

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set(CMAKE_EXPORT_COMPILE_COMMANDS ON) # export compile_commands.json to use with LSP
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set(CMAKE_CXX_STANDARD 17)
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set(CMAKE_CXX_STANDARD_REQUIRED ON)
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get_filename_component(PROJECT_ROOT ${CMAKE_CURRENT_SOURCE_DIR} DIRECTORY)
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get_filename_component(PROJECT_ROOT ${PROJECT_ROOT} DIRECTORY)
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# Construct potential paths
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set(FILEPATH_CURRENT_DIR "${CMAKE_CURRENT_SOURCE_DIR}/${FILENAME}")
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set(FILEPATH_PROJECT_ROOT "${PROJECT_ROOT}/${FILENAME}")
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# Check if the file exists in the current directory
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if(EXISTS ${FILEPATH_CURRENT_DIR})
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set(TARGET_FILE_PATH ${CMAKE_CURRENT_SOURCE_DIR})
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elseif(EXISTS ${FILEPATH_PROJECT_ROOT})
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set(TARGET_FILE_PATH ${PROJECT_ROOT})
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else()
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message(FATAL_ERROR "File ${FILENAME} not found in either ${CMAKE_CURRENT_SOURCE_DIR} or ${CMAKE_CURRENT_SOURCE_DIR}/../../")
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endif()
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# Ensure the build type is set
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if(NOT CMAKE_BUILD_TYPE)
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set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build: Debug or Release" FORCE)
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endif()
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# Define architecture and build type directories or file names
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if(CMAKE_SIZEOF_VOID_P EQUAL 8)
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set(ARCH "x64")
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else()
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set(ARCH "x86")
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endif()
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if(CMAKE_BUILD_TYPE STREQUAL "Debug")
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set(BUILD_TYPE "Debug")
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else()
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set(BUILD_TYPE "Release")
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endif()
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if(NOT TARGET gpu)
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message(STATUS "GPU_LIB not found")
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include("${TARGET_FILE_PATH}/cmake/webgpu.cmake")
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include("${TARGET_FILE_PATH}/cmake/gpu.cmake")
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endif()
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add_executable(${PROJECT_NAME} run.cpp)
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target_link_libraries(${PROJECT_NAME} PRIVATE gpu)
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target_link_libraries(${PROJECT_NAME} PRIVATE wgpu)
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target_link_libraries(${PROJECT_NAME} PRIVATE webgpu)
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if(WIN32)
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# Ensure DLL is copied if on Windows
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add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
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COMMAND ${CMAKE_COMMAND} -E copy_if_different
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${DLL_PATH}
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$<TARGET_FILE_DIR:${PROJECT_NAME}>)
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endif()

‎cmake/gpu.cmake

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# Specify the filename to search for
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set(FILENAME "gpu.h")
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get_filename_component(PROJECT_ROOT ${CMAKE_CURRENT_SOURCE_DIR} DIRECTORY)
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get_filename_component(PROJECT_ROOT ${PROJECT_ROOT} DIRECTORY)
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# Construct potential paths
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set(FILEPATH_CURRENT_DIR "${CMAKE_CURRENT_SOURCE_DIR}/${FILENAME}")
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set(FILEPATH_PROJECT_ROOT "${PROJECT_ROOT}/${FILENAME}")
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# Check if the file exists in the current directory
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if(EXISTS ${FILEPATH_CURRENT_DIR})
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set(TARGET_FILE_PATH ${CMAKE_CURRENT_SOURCE_DIR})
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elseif(EXISTS ${FILEPATH_PROJECT_ROOT})
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set(TARGET_FILE_PATH ${PROJECT_ROOT})
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else()
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message(FATAL_ERROR "File ${FILENAME} not found in either ${CMAKE_CURRENT_SOURCE_DIR} or ${CMAKE_CURRENT_SOURCE_DIR}/../../")
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endif()
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# Define architecture and build type directories or file names
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if(CMAKE_SIZEOF_VOID_P EQUAL 8)
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set(ARCH "x64")
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else()
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set(ARCH "x86")
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endif()
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if(CMAKE_BUILD_TYPE STREQUAL "Debug")
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set(BUILD_TYPE "Debug")
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else()
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set(BUILD_TYPE "Release")
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endif()
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add_library(webgpulib SHARED IMPORTED)
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add_library(gpu INTERFACE)
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add_library(wgpu INTERFACE)
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add_dependencies(gpu webgpulib)
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# Define the header-only library
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target_include_directories(gpu INTERFACE ${TARGET_FILE_PATH})
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# Add headers webgpu.h
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target_include_directories(wgpu INTERFACE ${TARGET_FILE_PATH}/third_party/headers)
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if(WIN32)
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set(DLL_PATH "${TARGET_FILE_PATH}/third_party/lib/libdawn_${ARCH}_${BUILD_TYPE}.dll")
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if(EXISTS ${DLL_PATH})
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file(COPY ${DLL_PATH} DESTINATION ${CMAKE_CURRENT_BINARY_DIR})
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target_link_libraries(webgpulib INTERFACE ${DLL_PATH})
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else()
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message(FATAL_ERROR "libdawn dll not found at: ${DLL_PATH}")
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endif()
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else()
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find_library(LIBDAWN dawn REQUIRED PATHS "${TARGET_FILE_PATH}/third_party/lib")
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if(LIBDAWN)
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message(STATUS "Found libdawn: ${LIBDAWN}")
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# Link against libdawn
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target_link_libraries(webgpulib INTERFACE ${LIBDAWN})
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else()
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message(FATAL_ERROR "libdawn not found")
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endif()
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endif()

‎cmake/webgpu.cmake

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# Specify the filename to search for
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set(FILENAME "gpu.h")
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get_filename_component(PROJECT_ROOT ${CMAKE_CURRENT_SOURCE_DIR} DIRECTORY)
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get_filename_component(PROJECT_ROOT ${PROJECT_ROOT} DIRECTORY)
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# Construct potential paths
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set(FILEPATH_CURRENT_DIR "${CMAKE_CURRENT_SOURCE_DIR}/${FILENAME}")
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set(FILEPATH_PROJECT_ROOT "${PROJECT_ROOT}/${FILENAME}")
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# Check if the file exists in the current directory
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if(EXISTS ${FILEPATH_CURRENT_DIR})
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set(TARGET_FILE_PATH ${CMAKE_CURRENT_SOURCE_DIR})
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elseif(EXISTS ${FILEPATH_PROJECT_ROOT})
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set(TARGET_FILE_PATH ${PROJECT_ROOT})
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else()
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message(FATAL_ERROR "File ${FILENAME} not found in either ${CMAKE_CURRENT_SOURCE_DIR} or ${CMAKE_CURRENT_SOURCE_DIR}/../../")
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endif()
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include(FetchContent)
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set(FETCHCONTENT_BASE_DIR "${TARGET_FILE_PATH}/third_party/fetchcontent")
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set(WEBGPU_DIST_LOCAL_PATH "${TARGET_FILE_PATH}/third_party/local/WebGPU-distribution")
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if(USE_LOCAL_LIBS)
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set(WEBGPU_DIST_GIT_REPO ${WEBGPU_DIST_LOCAL_PATH})
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message(STATUS "Using local WebGPU distribution: ${WEBGPU_DIST_LOCAL_PATH}")
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else()
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set(WEBGPU_DIST_GIT_REPO "https://github.com/eliemichel/WebGPU-distribution")
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endif()
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option(WEBGPU_TAG "WebGPU distribution tag to use")
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if (NOT WEBGPU_TAG)
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set(WEBGPU_TAG "dawn")
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endif()
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message(STATUS "Using WebGPU distribution tag: ${WEBGPU_TAG}")
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if (WEBGPU_TAG STREQUAL "dawn")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DWEBGPU_BACKEND_DAWN")
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# use specific commit
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# set(WEBGPU_TAG "1025b977e1927b6d0327e67352f90feb4bcf8274")
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# set(WEBGPU_TAG "acf972b7b909f52e183bdae3971b93bb13d4a29e")
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# add_compile_options(-UABSL_INTERNAL_AT_LEAST_CXX20)
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# set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -UABSL_INTERNAL_AT_LEAST_CXX20")
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message(STATUS "Using Dawn backend")
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endif()
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FetchContent_Declare(
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webgpu
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GIT_REPOSITORY ${WEBGPU_DIST_GIT_REPO}
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GIT_TAG ${WEBGPU_TAG}
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GIT_SHALLOW TRUE
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)
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FetchContent_MakeAvailable(webgpu)

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