feat: macOS ARM64 support — LLVM default toolchain + CI#45
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- probe.cppm: platform-aware runtime dir discovery (macOS paths + xcrun sysroot fallback) - flags.cppm: skip -static on macOS (libSystem must be dynamic) - config.cppm: skip patchelf bootstrap on macOS (Mach-O, not ELF) - install.sh: add darwin-arm64/x86_64 platform detection + macOS sha256 compat - ci-macos.yml: lightweight macOS ARM64 smoke test workflow - Design doc: .agents/docs/2026-05-16-macos-support-design.md
xlings releases use "macosx-arm64" naming, not "macos-arm64" or "darwin-arm64".
macOS /tmp symlinks to /private/tmp which breaks find. Use explicit mktemp -d and construct the expected directory name directly.
xlings macOS binary has dyld compatibility issues with GitHub runners. Restructure CI to: 1. Use Homebrew LLVM to validate the compilation model (import std, modules) 2. Validate probe/sysroot behavior on macOS 3. Test install.sh platform detection 4. Separately check xlings binary compat (continue-on-error)
- cli.cppm: platform-aware first-run default (llvm@20.1.7 on macOS, gcc@15.1.0-musl on Linux) - cli.cppm: platform-aware error messages for MCPP_NO_AUTO_INSTALL - ci-macos.yml: full xlings → LLVM install → import std/std.compat/ multi-module E2E validation on macos-15
The macOS CI is now stable and should gate all future changes.
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Summary
import std、import std.compat、多模块项目Changes
核心适配
src/cli.cppm: macOS first-run 默认安装llvm@20.1.7（Linux 不变，仍为gcc@15.1.0-musl）src/toolchain/probe.cppm: 平台感知的运行时路径发现 +xcrun --show-sdk-pathsysroot fallbacksrc/build/flags.cppm: macOS 跳过-static（libSystem 必须动态链接）src/config.cppm: macOS 跳过 patchelf 引导（Mach-O 不需要 ELF patching）install.sh: 增加darwin-arm64/darwin-x86_64平台检测 + macOS sha256 兼容CI
.github/workflows/ci-macos.yml: macOS ARM64 完整 E2E 验证import std→import std.compat→ 多模块项目 → probe 逻辑验证CI 验证结果
在
macos-15(ARM64, macOS 15.7.4) 上全部通过：arm64-apple-darwin24.6.0）import std编译+运行import std.compat编译+运行Test plan
#if defined(__APPLE__)保护下）