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swift-mirror/test/stdlib/WASILibcAPI.swift
Max Desiatov ab7cd238fd [6.2] test/CMakeLists.txt: run Embedded Swift for Wasm tests (#83287)
Cherry-pick of #83128, #82399, and #82878, merged as ea6ca2b5db, 0c4e56174b, and e34eb3331f respectively.

**Explanation**: Currently `test/CMakeLists.txt` can only set `SWIFT_LIT_ARGS` for all tests uniformly. This means that we can't have tests for Embedded Swift with a different set of `lit.py` arguments.

Also, create new `check-swift-embedded-wasi` target from `test/CMakeLists.txt`, tweak `lit.cfg` to support WASI Clang resource dir, exclude unsupported tests based on `CPU=wasm32` instead of `OS=wasi`.

**Scope**: Limited to Embedded Swift test suite.
**Risk**: Low, due to limited scope.
**Testing**: #82878 was incubated on `main` for 2 weeks, #82399 for 3 weeks with no disruption, #83128 merged this week, but enables all these tests on CI, which are consistently passing.
**Issue**: rdar://156585717
**Reviewer**: @bnbarham
2025-07-26 09:48:47 +01:00

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Swift

// RUN: %target-swift-frontend -typecheck -swift-version 6 %s -verify
// REQUIRES: executable_test
// REQUIRES: OS=wasip1
import WASILibc
// errno is a global thread-local variable, so it should be accessible
// from any context.
enum TestErrno {
static func testSyncContext() {
_ = errno
errno = 0
}
static func testAsyncContext() async {
_ = errno
errno = 0
}
}