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authorJulian Frimmel <julian@fri-me.de>2024-10-15 23:07:00 +0200
committerJulian Frimmel <julian@fri-me.de>2024-10-17 09:00:08 +0200
commita35ed2f9eb52176b14e27f0f39229015cf035a30 (patch)
tree6c83868444796c5c2eb9b8ab76fa9d084f0eb267 /compiler/rustc_codegen_llvm/src
parentbb8db13892ced757faf1c0206c70f313cd4b23c0 (diff)
downloadrust-a35ed2f9eb52176b14e27f0f39229015cf035a30.tar.gz
rust-a35ed2f9eb52176b14e27f0f39229015cf035a30.zip
Use `rust-lld` instead of `avr-gcc` as the linker
This fixes the [build error] caused by the `avr-gcc` (used as linker)
not being available in the Rust CI. This is a viable solution, which
shows the wrong/right behavior and, since no functions from `libgcc` are
called, does not produce errors. This was discussed [here]. Another
small problem is, that `lld` doesn't link the correct startup-code by
default. This is not a problem for this test (since it does not actually
use anything the startup code is needed for (no variables, no stack, no
interrupts)), but this causes the `main`-function to be removed by the
default flag `--gc-sections`. Therefore the `rmake`-driver also adds the
linker flag `--entry=main` to mark the `main`-function as the entry
point and thus preventing it from getting removed. The code would work
on a real AVR device.

[build error]: https://github.com/rust-lang/rust/pull/131755#issuecomment-2415127952
[here]: https://github.com/rust-lang/rust/pull/131755#issuecomment-2416469675
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