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Rename x86_64-unknown-none-elf to x86_64-unknown-none

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Most Rust freestanding/bare-metal targets use just `-unknown-none` here,
including aarch64-unknown-none, mipsel-unknown-none, and the BPF
targets. The *only* target using `-unknown-none-elf` is RISC-V.

The underlying toolchain doesn't care; LLVM accepts both `x86_64-unknown-none`
and `x86_64-unknown-none-elf`.

In addition, there's a long history of embedded x86 targets with varying
definitions for the `elf` suffix; on some of those embedded targets,
`elf` implied the inclusion of a C library based on newlib or similar.
Using `x86_64-unknown-none` avoids any potential ambiguity there.

(Work on this target sponsored by Profian.)
This commit is contained in:
Josh Triplett 2021-09-19 12:05:58 -07:00 • committed by Mike Leany
parent 5ba3a651f9
commit a23ee64c2c
3 changed files with 2 additions and 2 deletions
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2
compiler/rustc_target/src/spec/mod.rs
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@ -955,7 +955,7 @@ supported_targets! {
("armv7-unknown-linux-uclibceabihf", armv7_unknown_linux_uclibceabihf),
("x86_64-unknown-none-elf", x86_64_unknown_none_elf),
("x86_64-unknown-none", x86_64_unknown_none),
}
/// Warnings encountered when parsing the target `json`.