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/// Rust and Clang don't really agree on naming, so do a best-effort
/// conversion to support out-of-tree / custom target-spec targets.
pub(crate) fn guess_llvm_target_triple(
full_arch: &str,
vendor: &str,
os: &str,
env: &str,
abi: &str,
) -> String {
let arch = match full_arch {
riscv32 if riscv32.starts_with("riscv32") => "riscv32",
riscv64 if riscv64.starts_with("riscv64") => "riscv64",
arch => arch,
};
let os = match os {
"darwin" => "macosx",
"visionos" => "xros",
"uefi" => "windows",
os => os,
};
let env = match env {
"newlib" | "nto70" | "nto71" | "ohos" | "p1" | "p2" | "relibc" | "sgx" | "uclibc" => "",
env => env,
};
let abi = match abi {
"sim" => "simulator",
"llvm" | "softfloat" | "uwp" | "vec-extabi" => "",
"ilp32" => "_ilp32",
abi => abi,
};
match (env, abi) {
("", "") => format!("{arch}-{vendor}-{os}"),
(env, abi) => format!("{arch}-{vendor}-{os}-{env}{abi}"),
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_basic_llvm_triple_guessing() {
assert_eq!(
guess_llvm_target_triple("aarch64", "unknown", "linux", "", ""),
"aarch64-unknown-linux"
);
assert_eq!(
guess_llvm_target_triple("x86_64", "unknown", "linux", "gnu", ""),
"x86_64-unknown-linux-gnu"
);
assert_eq!(
guess_llvm_target_triple("x86_64", "unknown", "linux", "gnu", "eabi"),
"x86_64-unknown-linux-gnueabi"
);
assert_eq!(
guess_llvm_target_triple("x86_64", "apple", "darwin", "", ""),
"x86_64-apple-macosx"
);
}
}