In practice we are using 14.0.0 in most cases, as the LLVM Project have
not published Ubuntu binaries for any point release after 14.0.0 (which
we are using here).
The 13.0.1-1 MSYS2 binaries cause linker errors due to missing `new` and
`delete` symbols. This commit partially reverts the LLVM 13.0.1 upgrade:
Windows cross-compilation still uses `clang 13.0.1`, but is compiled
against `libc++ 13.0.0`.
This is the second release in a row where LLVM has cut a X.0.1 for
everything except Darwin, so I've adjusted its URLs and paths on the
assumption this will continue.
For mingw32:
- We use the binaries provided by MSYS2, which do not go back as far as
libc++ 8. We use libc++ 9 here, matching the LLVM version we will be
switching to in a subsequent commit (to match the LLVM version used by
Rust 1.44). We manually specify the path to the libc++ headers,
because they don't match the headers used by Clang itself.
- We now require at least mingw-w64 6.0.0, which fixes two Clang
compilation bugs:
- 1bd66b53be
- 82b169c573
Darwin is ignored, as the Xcode SDK includes libc++.
For all other targets, we use the static libraries included in Clang
releases. We reuse the files we downloaded in native_clang for native
compilation, instead of fetching the archive twice.
Jack Grigg
Alex Wied
Dimitris Apostolou