1use super::TargetInfo;
2
3impl TargetInfo<'_> {
4 /// The versioned LLVM/Clang target triple.
5 pub(crate) fn versioned_llvm_target(&self, version: &str) -> String {
6 // Only support versioned Apple targets for now.
7 assert_eq!(self.vendor, "apple");
8
9 let mut components: Split<'_, &'static str> = self.llvm_target.split("-");
10 let arch: &str = components.next().expect(msg:"llvm_target should have arch");
11 let vendor: &str = components.next().expect(msg:"llvm_target should have vendor");
12 let os: &str = components.next().expect(msg:"LLVM target should have os");
13 let environment: Option<&str> = components.next();
14 assert_eq!(components.next(), None, "too many LLVM target components");
15
16 if let Some(env: &str) = environment {
17 format!("{arch}-{vendor}-{os}{version}-{env}")
18 } else {
19 format!("{arch}-{vendor}-{os}{version}")
20 }
21 }
22}
23
24/// Rust and Clang don't really agree on naming, so do a best-effort
25/// conversion to support out-of-tree / custom target-spec targets.
26pub(crate) fn guess_llvm_target_triple(
27 full_arch: &str,
28 vendor: &str,
29 os: &str,
30 env: &str,
31 abi: &str,
32) -> String {
33 let arch = match full_arch {
34 riscv32 if riscv32.starts_with("riscv32") => "riscv32",
35 riscv64 if riscv64.starts_with("riscv64") => "riscv64",
36 arch => arch,
37 };
38 let os = match os {
39 "darwin" => "macosx",
40 "visionos" => "xros",
41 "uefi" => "windows",
42 os => os,
43 };
44 let env = match env {
45 "newlib" | "nto70" | "nto71" | "nto71_iosock" | "ohos" | "p1" | "p2" | "relibc" | "sgx"
46 | "uclibc" => "",
47 env => env,
48 };
49 let abi = match abi {
50 "sim" => "simulator",
51 "llvm" | "softfloat" | "uwp" | "vec-extabi" => "",
52 "ilp32" => "_ilp32",
53 abi => abi,
54 };
55 match (env, abi) {
56 ("", "") => format!("{arch}-{vendor}-{os}"),
57 (env, abi) => format!("{arch}-{vendor}-{os}-{env}{abi}"),
58 }
59}
60
61#[cfg(test)]
62mod tests {
63 use super::*;
64
65 #[test]
66 fn test_basic_llvm_triple_guessing() {
67 assert_eq!(
68 guess_llvm_target_triple("aarch64", "unknown", "linux", "", ""),
69 "aarch64-unknown-linux"
70 );
71 assert_eq!(
72 guess_llvm_target_triple("x86_64", "unknown", "linux", "gnu", ""),
73 "x86_64-unknown-linux-gnu"
74 );
75 assert_eq!(
76 guess_llvm_target_triple("x86_64", "unknown", "linux", "gnu", "eabi"),
77 "x86_64-unknown-linux-gnueabi"
78 );
79 assert_eq!(
80 guess_llvm_target_triple("x86_64", "apple", "darwin", "", ""),
81 "x86_64-apple-macosx"
82 );
83 }
84}
85