2 # This script installs clang on the local machine. Note that we don't install
3 # clang on Linux since its compiler story is just so different. Each container
4 # has its own toolchain configured appropriately already.
9 source "$(cd "$(dirname "$0")" && pwd)/../shared.sh"
11 # Update both macOS's and Windows's tarballs when bumping the version here.
15 curl -f "${MIRRORS_BASE}/clang%2Bllvm-${LLVM_VERSION}-x86_64-apple-darwin.tar.xz" | tar xJf -
17 ciCommandSetEnv CC "$(pwd)/clang+llvm-${LLVM_VERSION}-x86_64-apple-darwin/bin/clang"
18 ciCommandSetEnv CXX "$(pwd)/clang+llvm-${LLVM_VERSION}-x86_64-apple-darwin/bin/clang++"
20 # macOS 10.15 onwards doesn't have libraries in /usr/include anymore: those
21 # are now located deep into the filesystem, under Xcode's own files. The
22 # native clang is configured to use the correct path, but our custom one
23 # doesn't. This sets the SDKROOT environment variable to the SDK so that
24 # our own clang can figure out the correct include path on its own.
25 ciCommandSetEnv SDKROOT "$(xcrun --sdk macosx --show-sdk-path)"
27 # Configure `AR` specifically so rustbuild doesn't try to infer it as
28 # `clang-ar` by accident.
29 ciCommandSetEnv AR "ar"
30 elif isWindows && [[ ${CUSTOM_MINGW-0} -ne 1 ]]; then
31 # If we're compiling for MSVC then we, like most other distribution builders,
32 # switch to clang as the compiler. This'll allow us eventually to enable LTO
33 # amongst LLVM and rustc. Note that we only do this on MSVC as I don't think
34 # clang has an output mode compatible with MinGW that we need. If it does we
35 # should switch to clang for MinGW as well!
37 # Note that the LLVM installer is an NSIS installer
39 # Original downloaded here came from:
41 # https://github.com/llvm/llvm-project/releases/download/llvmorg-10.0.0/LLVM-10.0.0-win64.exe
43 # That installer was run through `wine ./installer.exe /S /NCRC` on Linux
44 # and then the resulting installation directory (found in
45 # `$HOME/.wine/drive_c/Program Files/LLVM`) was packaged up into a tarball.
46 # We've had issues otherwise that the installer will randomly hang, provide
47 # not a lot of useful information, pollute global state, etc. In general the
48 # tarball is just more confined and easier to deal with when working with
49 # various CI environments.
53 curl -f "${MIRRORS_BASE}/LLVM-${LLVM_VERSION}-win64.tar.gz" | tar xzf -
54 ciCommandSetEnv RUST_CONFIGURE_ARGS \
55 "${RUST_CONFIGURE_ARGS} --set llvm.clang-cl=$(pwd)/clang-rust/bin/clang-cl.exe"