[WebGPU] Support crosscompiling on windows platform #22777
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Compile onnxruntime with --use_webgpu triggers dawn's compilation. Dawn build dxc from sources in third_party folders. However, dxc has poor support for crosscompilation (e.g. build arm64 on x64 platform). See details: microsoft/DirectXShaderCompiler#7000 This PR support crosscompilation through: - Build llvm-tblgen and clang-tblgen in configuration step with host cpu arch. - Use the built tool do build dxc and dawn - Copy dxil.dll from correct target arch folder (e.g. target is arm64 and copy from arm64/ folder instead of x64 folder always) Using local patch to host these changes for Dawn.
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| +# Disable CMAKE_CROSSCOMPING because we don't have full support | ||
| +if(CMAKE_CROSSCOMPILING) | ||
| + set(CMAKE_CROSSCOMPILING OFF) |
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But we are doing cross-compiling? Usually the var is set to ON when the CMAKE_SYSTEM_NAME variable has been set manually. And usually we only read from this var, we do not set it. I worry a lot of other cmake functions/modules may rely on this var.
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I think we can remove this. Let me have a try locally.
| + file(MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/native-tools) | ||
| + endif() | ||
| + | ||
| + if (NOT CLANG_TBLGEN OR NOT LLVM_TBLGEN) |
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This part is complicated. I think we may ask the user to provide a prebuilt binary instead. Like what we do now for protoc.exe .
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When we build onnxruntime on Windows, we also pass in a lot of other cmake parameters like "-A Win32 --toolset 14.40". These flags cannot be handled here.
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This part is complicated. I think we may ask the user to provide a prebuilt binary instead. Like what we do now for protoc.exe
It would be ideal that user could provided the pre-baked tool for this.
When we build onnxruntime on Windows, we also pass in a lot of other cmake parameters like "-A Win32 --toolset 14.40". These flags cannot be handled here.
My understanding is that in crosscompilation situation, the llvm-talgen and clang-tblgen are built in default behaviour? (Because we don't have extra params to define the behaviour)
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fix is working for me |
Compile onnxruntime with --use_webgpu triggers dawn's compilation. Dawn build dxc from sources in third_party folders. However, dxc has poor support for crosscompilation (e.g. build arm64 on x64 platform).
See details: microsoft/DirectXShaderCompiler#7000
This PR support crosscompilation through:
Using local patch to host these changes for Dawn.
Description
Motivation and Context