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[AVR] Replace broken 'avr-unknown-unknown' target with 'avr-unknown-gnu-atmega328' target The `avr-unknown-unknown` target has never worked correctly, always trying to invoke the host linker and failing. It aimed to be a mirror of AVR-GCC's default handling of the `avr-unknown-unknown' triple (assume bare minimum chip features, silently skip linking runtime libraries, etc). This behaviour is broken-by-default as it will cause a miscompiled executable when flashed. This patch improves the AVR builtin target specifications to instead expose only a 'avr-unknown-gnu-atmega328' target. This target system is `gnu`, as it uses the AVR-GCC frontend along with avr-binutils. The target triple ABI is 'atmega328'. In the future, it should be possible to replace the dependency on AVR-GCC and binutils by using the in-progress AVR LLD and compiler-rt support. Perhaps at that point it would make sense to add an 'avr-unknown-unknown-atmega328' target as a better default when implemented. There is no current intention to add in-tree AVR target specifications for other AVR microcontrollers - this one can serve as a reference implementation for other devices via `rustc --print target-spec-json avr-unknown-gnu-atmega328p`. There should be no users of the existing 'avr-unknown-unknown' Rust target as a custom target specification JSON has always been recommended, and the avr-unknown-unknown target could never pass the linking step anyway. |
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| alloc | ||
| backtrace@4083a90168 | ||
| core | ||
| panic_abort | ||
| panic_unwind | ||
| proc_macro | ||
| profiler_builtins | ||
| rtstartup | ||
| rustc-std-workspace-alloc | ||
| rustc-std-workspace-core | ||
| rustc-std-workspace-std | ||
| std | ||
| stdarch@78891cdf29 | ||
| term | ||
| test | ||
| unwind | ||