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The #[used] attribute explicitly only requires symbols to be retained in object files, but allows the linker to drop them if dead. This corresponds to llvm.compiler.used semantics. The motivation to change this *now* is that https://reviews.llvm.org/D97448 starts emitting #[used] symbols into unique sections with SHF_GNU_RETAIN flag. This triggers a bug in some version of gold, resulting in the ARGV_INIT_ARRAY symbol part of the .init_array section to be incorrectly placed. |
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| .. | ||
| src | ||
| Cargo.toml | ||
| README.md | ||
The codegen crate contains the code to convert from MIR into LLVM IR,
and then from LLVM IR into machine code. In general it contains code
that runs towards the end of the compilation process.
For more information about how codegen works, see the rustc dev guide.