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This follows http://blog.llvm.org/2019/11/deterministic-builds-with-clang-and-lld.html to make the GN build locally deterministic. With this, I've built lld at two different build paths on my Windows box and got identical binaries. (I'd expect the same to happen on Linux, and with other binaries.) This doesn't have the bits to get universal determinism yet. Differential Revision: https://reviews.llvm.org/D74519
19 lines
744 B
Markdown
19 lines
744 B
Markdown
Deterministic builds with LLVM's GN build
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=========================================
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Summary: Use the following args.gn.
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use_relative_paths_in_debug_info = true
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It is possible to produce [locally deterministic][1] builds of LLVM
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with the GN build. It requires some configuration though.
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1. Make debug info use relative paths by setting
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`use_relative_paths_in_debug_info = true` in your `args.gn` file. With this
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set, current debuggers need minor configuration to keep working. See
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"Getting to local determinism" and "Getting debuggers to work well with
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locally deterministic builds" in the [deterministic builds][1] documentation
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for details.
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1: http://blog.llvm.org/2019/11/deterministic-builds-with-clang-and-lld.html
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