Unify dylib loading between proc macros and codegen backends #121392
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As bonus this makes the errors when failing to load a proc macro more informative to match the backend loading errors. In addition it makes it slightly easier to patch rustc to work on platforms that don't support dynamic linking like wasm.
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…iaskrgr Rollup of 8 pull requests Successful merges: - rust-lang#121206 (Top level error handling) - rust-lang#121261 (coverage: Remove `pending_dups` from the span refiner) - rust-lang#121336 (triagebot: add queue notifications) - rust-lang#121373 (Consistently refer to a test's `revision` instead of `cfg`) - rust-lang#121391 (never patterns: Fix liveness analysis in the presence of never patterns) - rust-lang#121392 (Unify dylib loading between proc macros and codegen backends) - rust-lang#121399 (Solaris linker does not support --strip-debug) - rust-lang#121406 (Add a couple tests) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#121392 - bjorn3:unify_dylib_loading, r=petrochenkov Unify dylib loading between proc macros and codegen backends As bonus this makes the errors when failing to load a proc macro more informative to match the backend loading errors. In addition it makes it slightly easier to patch rustc to work on platforms that don't support dynamic linking like wasm.
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Mar 4, 2024
…th, r=bjorn3
Fix duplicated path in the "not found dylib" error
While working on the gcc backend, I couldn't figure out why I had this error:
```
error: couldn't load codegen backend /checkout/compiler/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so/checkout/compiler/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so: cannot open shared object file: No such file or directory
```
As you can see, the path is duplicated for some reason. After investigating a bit more, I realized that `libloading::Error::LoadLibraryExW` starts with the path of the not found dylib, making it appear twice in our error afterward (because we do render it like this: `{path}{err}`, and since the `err` starts with the path...).
Thanks to `@bjorn3` for linking me to rust-lang#121392. :)
jhpratt
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Mar 5, 2024
…th, r=bjorn3
Fix duplicated path in the "not found dylib" error
While working on the gcc backend, I couldn't figure out why I had this error:
```
error: couldn't load codegen backend /checkout/compiler/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so/checkout/compiler/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so: cannot open shared object file: No such file or directory
```
As you can see, the path is duplicated for some reason. After investigating a bit more, I realized that `libloading::Error::LoadLibraryExW` starts with the path of the not found dylib, making it appear twice in our error afterward (because we do render it like this: `{path}{err}`, and since the `err` starts with the path...).
Thanks to ``@bjorn3`` for linking me to rust-lang#121392. :)
matthiaskrgr
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Mar 5, 2024
…th, r=bjorn3
Fix duplicated path in the "not found dylib" error
While working on the gcc backend, I couldn't figure out why I had this error:
```
error: couldn't load codegen backend /checkout/compiler/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so/checkout/compiler/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so: cannot open shared object file: No such file or directory
```
As you can see, the path is duplicated for some reason. After investigating a bit more, I realized that `libloading::Error::LoadLibraryExW` starts with the path of the not found dylib, making it appear twice in our error afterward (because we do render it like this: `{path}{err}`, and since the `err` starts with the path...).
Thanks to ```@bjorn3``` for linking me to rust-lang#121392. :)
matthiaskrgr
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Mar 5, 2024
…th, r=bjorn3
Fix duplicated path in the "not found dylib" error
While working on the gcc backend, I couldn't figure out why I had this error:
```
error: couldn't load codegen backend /checkout/compiler/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so/checkout/compiler/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so: cannot open shared object file: No such file or directory
```
As you can see, the path is duplicated for some reason. After investigating a bit more, I realized that `libloading::Error::LoadLibraryExW` starts with the path of the not found dylib, making it appear twice in our error afterward (because we do render it like this: `{path}{err}`, and since the `err` starts with the path...).
Thanks to ````@bjorn3```` for linking me to rust-lang#121392. :)
matthiaskrgr
added a commit
to matthiaskrgr/rust
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Mar 5, 2024
…th, r=bjorn3
Fix duplicated path in the "not found dylib" error
While working on the gcc backend, I couldn't figure out why I had this error:
```
error: couldn't load codegen backend /checkout/compiler/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so/checkout/compiler/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so: cannot open shared object file: No such file or directory
```
As you can see, the path is duplicated for some reason. After investigating a bit more, I realized that `libloading::Error::LoadLibraryExW` starts with the path of the not found dylib, making it appear twice in our error afterward (because we do render it like this: `{path}{err}`, and since the `err` starts with the path...).
Thanks to `````@bjorn3````` for linking me to rust-lang#121392. :)
rust-timer
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Mar 6, 2024
Rollup merge of rust-lang#121978 - GuillaumeGomez:dylib-duplicated-path, r=bjorn3 Fix duplicated path in the "not found dylib" error While working on the gcc backend, I couldn't figure out why I had this error: ``` error: couldn't load codegen backend /checkout/compiler/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so/checkout/compiler/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so: cannot open shared object file: No such file or directory ``` As you can see, the path is duplicated for some reason. After investigating a bit more, I realized that `libloading::Error::LoadLibraryExW` starts with the path of the not found dylib, making it appear twice in our error afterward (because we do render it like this: `{path}{err}`, and since the `err` starts with the path...). Thanks to `````@bjorn3````` for linking me to rust-lang#121392. :)
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As bonus this makes the errors when failing to load a proc macro more informative to match the backend loading errors. In addition it makes it slightly easier to patch rustc to work on platforms that don't support dynamic linking like wasm.