Fix x.py doc --stage 1 src/tools/error_index_generator
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…true` Previously, the LD_LIBRARY_PATH for the linkchecker looked like `build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/lib`, because the linkchecker depends on the master copy of the standard library. This is true, but doesn't include the library path for the compiler libraries: ``` /home/joshua/src/rust/rust/build/x86_64-unknown-linux-gnu/stage1-tools-bin/error_index_generator: error while loading shared libraries: libLLVM-12-rust-1.53.0-nightly.so: cannot open shared object file: No such file or directory ``` That file is in `build/x86_64-unknown-linux-gnu/stage1/lib/libLLVM-12-rust-1.53.0-nightly.so`, which wasn't included in the dynamic path. This adds `build/x86_64-unknown-linux-gnu/stage1/lib` to the dynamic path for the linkchecker.
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The error index is a complicated tool (because it depends on rustdoc) and this fix is only one of many possible approaches. Here is the sequence of fixes that culminated in this commit: 1. The error index gives an error that libLLVM-nightly.so isn't found. 2. libLLVM-nightly.so is present in stage1/lib, but not in stage0/lib. 3. `builder.sysroot()` returns `stage0-sysroot`, but `builder.rustc_libdir()` returns `stage0/lib`. 4. Therefore, special case the sysroot to be `stage0` for the error index. Another, possibly better fix is to stop depending on rustdoc at all, and call it as a binary or separate out a shared crate. But that's a larger refactor.
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☔ The latest upstream changes (presumably #84471) made this pull request unmergeable. Please resolve the merge conflicts. |
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stage0/lib contains libLLVM-12-rust-1.52.0-beta.so -- if we are running a stage 0 error index, it links against the bootstrap compiler, right? So it should link to that LLVM. IIRC the stage 0 rustdoc/error-index builds are specifically intended to link to the nightly compiler rather than building a local one to help developers reduce build times if they don't actually need a compiler, but maybe that's not the case anymore? Regardless, I am a bit worried about modifying and passing in the stage0/lib directory to the search path if the above is not true; it definitely contains "bootstrap" compiler libraries, and I can see us easily running into "compiled with the wrong version" errors with this patch, right? |
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triage: merge conflict |
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Ping from triage: |
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I won't have time to work on this in the near future. |
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(also, it seems like this is the wrong approach) |
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The error index is a complicated tool (because it depends on rustdoc)
and this fix is only one of many possible approaches.
Here is the sequence of fixes that culminated in this commit:
builder.sysroot()returnsstage0-sysroot, butbuilder.rustc_libdir()returnsstage0/lib.stage0for the error index and copy libLLVM-nightly.so into it.Another, possibly better fix is to stop depending on rustdoc at all, and
call it as a binary or separate out a shared crate. But that's a larger
refactor.
Builds on #84471. This is the same diff as #84471 (comment). Helps with #78778. Fixes #80096.
r? @Mark-Simulacrum