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infer linker flavor by linker name if it's sufficiently specific #136473

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infer linker flavor by linker name if it's sufficiently specific #136473

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43 changes: 27 additions & 16 deletions compiler/rustc_target/src/spec/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -311,16 +311,32 @@ impl LinkerFlavor {
}
}

fn infer_linker_hints(linker_stem: &str) -> (Option<Cc>, Option<Lld>) {
fn infer_linker_hints(linker_stem: &str) -> Result<Self, (Option<Cc>, Option<Lld>)> {
// Remove any version postfix.
let stem = linker_stem
.rsplit_once('-')
.and_then(|(lhs, rhs)| rhs.chars().all(char::is_numeric).then_some(lhs))
.unwrap_or(linker_stem);

// GCC/Clang can have an optional target prefix.
if stem == "emcc"
|| stem == "gcc"
if stem == "ld.lld" {
Ok(Self::Gnu(Cc::No, Lld::Yes))
} else if stem == "ld64.lld" {
Ok(Self::Darwin(Cc::No, Lld::Yes))
} else if stem == "lld-link" {
Ok(Self::Msvc(Lld::Yes))
} else if stem == "wasm-ld" || stem == "wasm-component-ld" {
Ok(Self::WasmLld(Cc::No))
} else if stem == "lld" || stem == "rust-lld" {
Err((Some(Cc::No), Some(Lld::Yes)))
} else if stem == "emcc" {
Ok(Self::EmCc)
} else if stem == "bpf-linker" {
Ok(Self::Bpf)
} else if stem == "llvm-bitcode-linker" {
Ok(Self::Llbc)
} else if stem == "rust-ptx-linker" {
Ok(Self::Ptx)
} else if stem == "gcc" // GCC/Clang can have an optional target prefix.
|| stem.ends_with("-gcc")
|| stem == "g++"
|| stem.ends_with("-g++")
Expand All @@ -329,19 +345,11 @@ impl LinkerFlavor {
|| stem == "clang++"
|| stem.ends_with("-clang++")
{
(Some(Cc::Yes), Some(Lld::No))
} else if stem == "wasm-ld"
|| stem.ends_with("-wasm-ld")
|| stem == "ld.lld"
|| stem == "lld"
|| stem == "rust-lld"
|| stem == "lld-link"
{
(Some(Cc::No), Some(Lld::Yes))
Err((Some(Cc::Yes), Some(Lld::No)))
} else if stem == "ld" || stem.ends_with("-ld") || stem == "link" {
(Some(Cc::No), Some(Lld::No))
Err((Some(Cc::No), Some(Lld::No)))
} else {
(None, None)
Err((None, None))
}
}

Expand All @@ -365,7 +373,10 @@ impl LinkerFlavor {
}

pub fn with_linker_hints(self, linker_stem: &str) -> LinkerFlavor {
self.with_hints(LinkerFlavor::infer_linker_hints(linker_stem))
match LinkerFlavor::infer_linker_hints(linker_stem) {
Ok(linker_flavor) => linker_flavor,
Err(hints) => self.with_hints(hints),
}
}

pub fn check_compatibility(self, cli: LinkerFlavorCli) -> Option<String> {
Expand Down
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