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gcc-rs is one of two projects for bringing Rust to gcc. gcc-rs is the more ambitious of the two, with an entirely new frontend. There is also rustc_codegen_gcc (https://github.com/rust-lang/rustc_codegen_gcc) that keeps the rustc frontend, and only swaps out LLVM for GCC at the codegen stage.
> The underspecified part should not be a deal breaker, even though it's certainly a difficulty. But it will also be an opportunity to spot suboptimal implementation choices in rustc. Exposing these will improve the language as a whole.
but... we don't want same sourcecode compile with a compiler implementation, but not another, right?
When I say "under-specified", I meant something like this:
https://github.com/rust-lang/rust/pull/105300/
> I claim it's more correct as well because it fixes #104639.
There is no spec. Just a bunch of implementation-defined behavior. Without a spec, this would be a forever catching up game. It is not easy to come up with a spec -- the implement is filled with heuristics because the intrinsic NP-completeness.
- But this misses so much extra context information
3. Macro invocations there are really subtle rules on how you treat macro invocations such as this which is not documented at all https://github.com/Rust-GCC/gccrs/blob/master/gcc/rust/expan...
Some day I personally want to write a blog post about how complicated and under spec'd Rust is, then write one about the stuff i do like it such as iterators being part of libcore so i don't need reactive extensions.
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