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| author | Matthias Krüger <matthias.krueger@famsik.de> | 2022-12-09 22:31:57 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-12-09 22:31:57 +0100 |
| commit | 320d018268113dc688e40680ede5430d75999f0a (patch) | |
| tree | d6abc7b232e50d62282f4051e39592b45c622b77 /compiler | |
| parent | 5156fbdc74cbf9902a96bafd27775f4764d5bfde (diff) | |
| parent | 98ae83daae67e9e7663b8345eced1de8c667271f (diff) | |
| download | rust-320d018268113dc688e40680ede5430d75999f0a.tar.gz rust-320d018268113dc688e40680ede5430d75999f0a.zip | |
Rollup merge of #105468 - sunfishcode:sunfishcode/main-void-wasi, r=estebank
Mangle "main" as "__main_void" on wasm32-wasi On wasm, the age-old C trick of having a main function which can either have no arguments or argc+argv doesn't work, because wasm requires caller and callee signatures to match. WASI's current strategy is to have compilers mangle main's name to indicate which signature they're using. Rust uses the no-argument form, which should be mangled as `__main_void`. This is needed on wasm32-wasi as of #105395.
Diffstat (limited to 'compiler')
| -rw-r--r-- | compiler/rustc_target/src/spec/wasm32_wasi.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/compiler/rustc_target/src/spec/wasm32_wasi.rs b/compiler/rustc_target/src/spec/wasm32_wasi.rs index 6f0bbf0672d..a0476d542e6 100644 --- a/compiler/rustc_target/src/spec/wasm32_wasi.rs +++ b/compiler/rustc_target/src/spec/wasm32_wasi.rs @@ -104,6 +104,10 @@ pub fn target() -> Target { // `args::args()` makes the WASI API calls itself. options.main_needs_argc_argv = false; + // And, WASI mangles the name of "main" to distinguish between different + // signatures. + options.entry_name = "__main_void".into(); + Target { llvm_target: "wasm32-wasi".into(), pointer_width: 32, |