Rollup merge of #76364 - fusion-engineering-forks:avr-no-atomic, r=jo…

…nas-schievink Disable atomics on avr target. `max_atomic_width` was missing in the spec, which means it fell back to the pointer width of 16 bits. Fixes #76363.
rust-lang · Sep 6, 2020 · 23f8dd1 · 23f8dd1
2 parents 5d89259 + 61ac138
commit 23f8dd1
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/compiler/rustc_target/src/spec/avr_gnu_base.rs b/compiler/rustc_target/src/spec/avr_gnu_base.rs
@@ -45,6 +45,8 @@ pub fn target(target_cpu: String) -> TargetResult {
  late_link_args: vec![(LinkerFlavor::Gcc, vec!["-lgcc".to_owned()])]
  .into_iter()
  .collect(),
+ max_atomic_width: Some(0),
+ atomic_cas: false,
  ..TargetOptions::default()
  },
  })