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The compiler runs on Windows (and has seeds for macOS)

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Windows: the compiler made from bootstrap/windows-x86_64.ll runs under Wine, compiles itself to the same IR, builds an
exe of itself, and every test program passes through it. It needed: Windows-sized unsigned long for libclang's unsaved
file, no 'cross' when Windows builds for Windows, --target passed to libclang (libclang.dll assumes MSVC), the MinGW
triple always in the IR, FINCH_LDFLAGS, .exe names and FINCH_LLVM_INCLUDE in bootstrap/build.sh, winseed.sh/winbuild.sh.
macOS: seeds for arm64 and x86-64 made with the 11.3 SDK; IR is accepted by clang, nothing has run on a Mac yet.
CI gets a windows and a macos job. UNTESTED on real Windows/macOS runners.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015f73FesGZGYPkmDvUcj6QX
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Nexoniarz 2026-10-26 00:36:15 +01:00
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bootstrap/README.md
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@ -7,6 +7,8 @@ the compiler's own LLVM IR, one file per system:
|---|---|---|
| `linux-x86_64.ll` | Linux x86-64 | built and tested here and in CI |
| `linux-aarch64.ll` | Linux ARM64 | made with the ARM64 cross compiler; CI builds and tests it on an ARM64 runner |
| `windows-x86_64.ll` | Windows x86-64 (MinGW: llvm-mingw's clang + libclang.dll) | built and run under Wine: it compiles itself, and every test program runs |
| `macos-arm64.ll`, `macos-x86_64.ll` | macOS | made on Linux with the macOS 11.3 SDK; checked as IR only (nobody has run them yet) |
`bootstrap/build.sh` compiles the seed with `clang` (and the runtime, and libclang) into `build/finch0`; `finch0` builds
`src/` into `finch1`; `finch1` builds `src/` again into `build/finch`; the two must make the same IR, or the script stops.
@ -32,8 +34,12 @@ For another system, from a machine that has that system's headers and a cross co
FINCH_CC=aarch64-linux-gnu-gcc build/finch ir src/main.fch --target arm64 > bootstrap/linux-aarch64.ll
```
## macOS and Windows
## Windows and macOS
There is no seed for them yet: it needs Apple's or Microsoft's headers, which can't be had on Linux. Until there is one,
programs for macOS and Windows are built from Linux with `--target macos|windows`, and the compiler's older C++ version
(branch `before-bootstrap`) is the way to get a compiler that runs there.
Windows: `windows-x86_64.ll` is made by `bootstrap/winseed.sh` on Linux (llvm-mingw's MinGW headers and the headers of an
official LLVM for Windows); `bootstrap/winbuild.sh` turns it into `finch.exe` for trying under Wine. On a Windows machine
`bootstrap/build.sh` does the same from Git Bash: put llvm-mingw's `bin` in PATH and set `FINCH_LIBCLANG` (the path of
`libclang.dll`), `FINCH_LLVM_INCLUDE` (its `include` folder) and `FINCH_LDFLAGS=-L<folder of libclang.dll>`.
macOS: the seeds were made with the macOS 11.3 SDK; `brew install llvm@21` gives clang and libclang; the CI job sets
`FINCH_CLANG`, `FINCH_LIBCLANG` and `FINCH_LLVM_INCLUDE`. If the macOS build fails, that job is where it shows first.