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Rollup merge of #87922 - Manishearth:c-enum-target-spec, r=nagisa,eddyb

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Add c_enum_min_bits target spec field, use for arm-none and thumb-none targets

Fixes https://github.com/rust-lang/rust/issues/87917

<s>Haven't tested this yet, still playing around.</s>

This seems to fix the issue.
This commit is contained in:
Manish Goregaokar 2021-08-12 10:04:14 -07:00 • committed by GitHub
commit 692833a28f
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13 changed files with 529 additions and 16 deletions
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12
compiler/rustc_target/src/spec/mod.rs
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@ -1336,6 +1336,9 @@ pub struct TargetOptions {
/// If present it's a default value to use for adjusting the C ABI.
pub default_adjusted_cabi: Option<Abi>,
/// Minimum number of bits in #[repr(C)] enum. Defaults to 32.
pub c_enum_min_bits: u64,
}
impl Default for TargetOptions {
@ -1440,6 +1443,7 @@ impl Default for TargetOptions {
split_debuginfo: SplitDebuginfo::Off,
supported_sanitizers: SanitizerSet::empty(),
default_adjusted_cabi: None,
c_enum_min_bits: 32,
}
}
}
@ -1604,6 +1608,12 @@ impl Target {
base.$key_name = s;
}
} );
($key_name:ident, u64) => ( {
let name = (stringify!($key_name)).replace("_", "-");
if let Some(s) = obj.remove_key(&name).and_then(|j| Json::as_u64(&j)) {
base.$key_name = s;
}
} );
($key_name:ident, Option<u32>) => ( {
let name = (stringify!($key_name)).replace("_", "-");
if let Some(s) = obj.remove_key(&name).and_then(|j| Json::as_u64(&j)) {
@ -2017,6 +2027,7 @@ impl Target {
key!(split_debuginfo, SplitDebuginfo)?;
key!(supported_sanitizers, SanitizerSet)?;
key!(default_adjusted_cabi, Option<Abi>)?;
key!(c_enum_min_bits, u64);
if base.is_builtin {
// This can cause unfortunate ICEs later down the line.
@ -2255,6 +2266,7 @@ impl ToJson for Target {
target_option_val!(has_thumb_interworking);
target_option_val!(split_debuginfo);
target_option_val!(supported_sanitizers);
target_option_val!(c_enum_min_bits);
if let Some(abi) = self.default_adjusted_cabi {
d.insert("default-adjusted-cabi".to_string(), Abi::name(abi).to_json());