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Auto merge of #126907 - glaubitz:sparc-fixes, r=nagisa

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Fixes for 32-bit SPARC on Linux

This PR fixes a number of issues which previously prevented `rustc` from being built
successfully for 32-bit SPARC using the `sparc-unknown-linux-gnu` triplet.

In particular, it adds linking against `libatomic` where necessary, uses portable `AtomicU64`
for `rustc_data_structures` and rewrites the spec for `sparc_unknown_linux_gnu` to use
`TargetOptions` and replaces the previously used `-mv8plus` with the more portable
`-mcpu=v9 -m32`.

To make `rustc` build successfully, support for 32-bit SPARC needs to be added to the `object`
crate as well as the `nix` crate which I will be sending out later as well.

r? nagisa
This commit is contained in:
bors 2024-06-27 05:44:47 +00:00
commit 536235f07e
6 changed files with 25 additions and 18 deletions
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6
compiler/rustc_data_structures/src/marker.rs
View file

@ -147,14 +147,14 @@ cfg_match! {
[crate::owned_slice::OwnedSlice]
);
// PowerPC and MIPS platforms with 32-bit pointers do not
// MIPS, PowerPC and SPARC platforms with 32-bit pointers do not
// have AtomicU64 type.
#[cfg(not(any(target_arch = "powerpc", target_arch = "mips")))]
#[cfg(not(any(target_arch = "powerpc", target_arch = "powerpc", target_arch = "sparc")))]
already_sync!(
[std::sync::atomic::AtomicU64]
);
#[cfg(any(target_arch = "powerpc", target_arch = "mips"))]
#[cfg(any(target_arch = "mips", target_arch = "powerpc", target_arch = "sparc"))]
already_sync!(
[portable_atomic::AtomicU64]
);

6
compiler/rustc_data_structures/src/sync.rs
View file

@ -270,12 +270,12 @@ cfg_match! {
pub use std::sync::atomic::{AtomicBool, AtomicUsize, AtomicU32};
// PowerPC and MIPS platforms with 32-bit pointers do not
// MIPS, PowerPC and SPARC platforms with 32-bit pointers do not
// have AtomicU64 type.
#[cfg(not(any(target_arch = "powerpc", target_arch = "mips")))]
#[cfg(not(any(target_arch = "mips", target_arch = "powerpc", target_arch = "sparc")))]
pub use std::sync::atomic::AtomicU64;
#[cfg(any(target_arch = "powerpc", target_arch = "mips"))]
#[cfg(any(target_arch = "mips", target_arch = "powerpc", target_arch = "sparc"))]
pub use portable_atomic::AtomicU64;
pub use std::sync::Arc as Lrc;