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

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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.
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Dylan DPC 2020-09-07 01:18:17 +02:00 • committed by GitHub
commit 23f8dd19ff
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compiler/rustc_target/src/spec/avr_gnu_base.rs
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@ -45,6 +45,8 @@ pub fn target(target_cpu: String) -> TargetResult {
late_link_args: vec![(LinkerFlavor::Gcc, vec!["-lgcc".to_owned()])] late_link_args: vec![(LinkerFlavor::Gcc, vec!["-lgcc".to_owned()])]
.into_iter() .into_iter()
.collect(), .collect(),
max_atomic_width: Some(0),
atomic_cas: false,
..TargetOptions::default() ..TargetOptions::default()
}, },
}) })