91 lines
2.9 KiB
CMake
91 lines
2.9 KiB
CMake
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# cmake/MetalShaderCompile.cmake — Compile Metal shaders to metallib
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#
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# Usage:
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# include(cmake/MetalShaderCompile.cmake)
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# turboquant_add_metal_shader(TARGET shader_target SOURCE ggml-metal-turbo.metal)
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#
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# On non-macOS platforms, this is a no-op (shader is installed as source).
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# If Metal toolchain is not installed, shader compilation is skipped gracefully.
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function(turboquant_add_metal_shader)
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cmake_parse_arguments(ARGS "" "TARGET;SOURCE;OUTPUT" "" ${ARGN})
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if(NOT APPLE)
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# On non-Apple platforms, just ensure the .metal file is included
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# in install targets. Runtime compilation is not available.
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message(STATUS "Metal shader compilation skipped (not on Apple platform)")
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return()
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endif()
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find_program(XCRUN_EXECUTABLE xcrun)
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if(NOT XCRUN_EXECUTABLE)
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message(WARNING "xcrun not found — Metal shader compilation disabled")
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return()
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endif()
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# Check if Metal toolchain is actually installed
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execute_process(
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COMMAND "${XCRUN_EXECUTABLE}" -sdk macosx metal --version
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OUTPUT_VARIABLE METAL_VERSION
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ERROR_VARIABLE METAL_VERSION_ERR
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RESULT_VARIABLE METAL_VERSION_RESULT
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TIMEOUT 10
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)
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if(NOT METAL_VERSION_RESULT EQUAL 0)
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message(WARNING "Metal toolchain not installed (xcrun metal failed) — shader compilation disabled")
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message(STATUS " Install with: xcodebuild -downloadComponent MetalToolchain")
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return()
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endif()
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set(METAL_SOURCE "${CMAKE_CURRENT_SOURCE_DIR}/${ARGS_SOURCE}")
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set(METAL_AIR "${CMAKE_CURRENT_BINARY_DIR}/ggml-metal-turbo.air")
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set(METAL_LIB "${CMAKE_CURRENT_BINARY_DIR}/ggml-metal-turbo.metallib")
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if(ARGS_OUTPUT)
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set(METAL_LIB "${ARGS_OUTPUT}")
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endif()
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# Step 1: Compile .metal → .air (Metal intermediate)
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add_custom_command(
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OUTPUT "${METAL_AIR}"
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COMMAND "${XCRUN_EXECUTABLE}" -sdk macosx metal
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-c "${METAL_SOURCE}"
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-o "${METAL_AIR}"
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-std=metal2.4
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-O2
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DEPENDS "${METAL_SOURCE}"
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COMMENT "Compiling Metal shader: ${ARGS_SOURCE}"
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VERBATIM
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)
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# Step 2: Link .air → .metallib (Metal library)
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add_custom_command(
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OUTPUT "${METAL_LIB}"
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COMMAND "${XCRUN_EXECUTABLE}" -sdk macosx metallib
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"${METAL_AIR}"
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-o "${METAL_LIB}"
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DEPENDS "${METAL_AIR}"
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COMMENT "Linking Metal library: ggml-metal-turbo.metallib"
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VERBATIM
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)
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# Create target
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add_custom_target(${ARGS_TARGET} ALL
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DEPENDS "${METAL_LIB}"
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)
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# Install metallib alongside the binary
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install(FILES "${METAL_LIB}"
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DESTINATION bin
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COMPONENT runtime
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)
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# Also install raw .metal for runtime compilation fallback
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install(FILES "${METAL_SOURCE}"
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DESTINATION bin
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COMPONENT runtime
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)
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message(STATUS "Metal shader compilation configured: ${ARGS_SOURCE} -> ${METAL_LIB}")
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endfunction()
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