Add -fdebug-prefix-map and follow clang's behavior for debuginfo file/dir names#5039
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Add -fdebug-prefix-map and follow clang's behavior for debuginfo file/dir names#5039
-fdebug-prefix-map and follow clang's behavior for debuginfo file/dir names#5039Conversation
JohanEngelen
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I guess the test timeouts mean that indeed this now takes a lot of compile time to generate file info. Will implement a caching mechanism |
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circleci failure is unrelated (fails in other PRs too) |
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@kinke Can you review and give your OK for this change? Appreciated! |
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…/dir names. This is required to have reproducible builds without remapping the source code directory to a fixed location (for example in Bazel, where the source code for every build action will end up in a sandbox directory with some hash in the path name). Try to keep the implementation as close as possible to what clang does.
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| #undef startswith | ||
| #endif | ||
| llvm::SmallString<256> P = path; | ||
| for (auto &[from, to] : llvm::reverse(opts::debugPrefixMap)) |
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(clang's reverse makes sense because their debugPrefixMap is a vector of string-pairs, not a std::map)
Edit: I guess that's done so that later -fdebug-prefix-map cmdline args can override earlier ones.
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I've pushed a commit to mimic clang there too.
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https://clang.llvm.org/docs/ClangCommandLineReference.html#cmdoption-clang-fdebug-prefix-map
This is required to have reproducible builds without remapping the source code directory to a fixed location (for example in Bazel, where the source code for every build action will end up in a sandbox directory with some hash in the path name).
Try to keep the implementation as close as possible to what clang does.
Originally implemented by Ilya, modified and expanded by Johan.