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Use -unknown when converting WASI/Emscripten target triples into LLVM triples

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The "musl" part of the Zig target triples `wasm32-wasi-musl` and
`wasm32-emscripten-musl` refers to the libc, not really the ABI.

For WASM, most LLVM-based tooling uses `wasm32-wasi`, which is
normalized into `wasm32-unknown-wasi`, with an implicit `-unknown` and
without `-musl`.

Similarly, Emscripten uses `wasm32-unknown-emscripten` without `-musl`.

By using `-unknown` instead of `-musl` we get better compatibility with
external tooling.
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Carl Åstholm 2025-03-23 14:14:42 +01:00 committed by Alex Rønne Petersen
parent eedfce92b0
commit e62a3ea74e
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src/codegen/llvm.zig
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@ -265,7 +265,12 @@ pub fn targetTriple(allocator: Allocator, target: std.Target) ![]const u8 {
.eabihf => "eabihf",
.android => "android",
.androideabi => "androideabi",
.musl => "musl",
.musl => switch (target.os.tag) {
// For WASI/Emscripten, "musl" refers to the libc, not really the ABI.
// "unknown" provides better compatibility with LLVM-based tooling for these targets.
.wasi, .emscripten => "unknown",
else => "musl",
},
.muslabin32 => "musl", // Should be muslabin32 in LLVM 20.
.muslabi64 => "musl", // Should be muslabi64 in LLVM 20.
.musleabi => "musleabi",