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Use alias for zig cc => zigcc #291

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Use alias for zig cc => zigcc
guest271314 Sep 8, 2026
67d4867
Update README.md
guest271314 Sep 8, 2026
70fdd68
Update README.md
guest271314 Sep 8, 2026
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16 changes: 15 additions & 1 deletion README.md
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Expand Up @@ -112,7 +112,21 @@ $ scriptc coverage hello.ts

## Build WebAssembly

WASI and other cross-target builds require Zig. Its bundled WASI libc produces a portable WASI Preview 1 module through the production LLVM backend:
WASI and other cross-target builds require Zig.

Note:

`SCRIPTC_CC=zigcc` is not a command that `scriptc` runs; it's a keyword the compiler recognizes. In `packages/compiler/src/backend/native-toolchain.ts`, `resolveCc()` compares the value literally and maps it to the argv prefix `["zig", "cc"]`:

```javascript
if (cc !== "zigcc") {
throw new Error(`unknown SCRIPTC_CC '${cc}' (supported: clang, zigcc)`);
}
if (target === "") return { argv: ["zig", "cc"], ... };
```
Only the exact strings `clang` or `zigcc` are accepted; `scriptc` then spawns `zig cc` itself. The only prerequisite is having `zig` on `PATH`.

Its bundled WASI libc produces a portable WASI Preview 1 module through the production LLVM backend:

```console
$ SCRIPTC_CC=zigcc SCRIPTC_TARGET=wasm32-wasi scriptc build hello.ts --no-keep-c -o hello.wasm >/dev/null
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