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 # If the job selects a specific Xcode version, use that instead of
16 # downloading our own version.
17 if [[ ${USE_XCODE_CLANG-0} -eq 1 ]]; then
18 bindir="$(xcode-select --print-path)/Toolchains/XcodeDefault.xctoolchain/usr/bin"
20 file="${MIRRORS_BASE}/clang%2Bllvm-${LLVM_VERSION}-x86_64-apple-darwin.tar.xz"
21 curl -f "${file}" | tar xJf -
22 bindir="$(pwd)/clang+llvm-${LLVM_VERSION}-x86_64-apple-darwin/bin"
25 ciCommandSetEnv CC "${bindir}/clang"
26 ciCommandSetEnv CXX "${bindir}/clang++"
28 # macOS 10.15 onwards doesn't have libraries in /usr/include anymore: those
29 # are now located deep into the filesystem, under Xcode's own files. The
30 # native clang is configured to use the correct path, but our custom one
31 # doesn't. This sets the SDKROOT environment variable to the SDK so that
32 # our own clang can figure out the correct include path on its own.
33 ciCommandSetEnv SDKROOT "$(xcrun --sdk macosx --show-sdk-path)"
35 # Configure `AR` specifically so rustbuild doesn't try to infer it as
36 # `clang-ar` by accident.
37 ciCommandSetEnv AR "ar"
38 elif isWindows && [[ ${CUSTOM_MINGW-0} -ne 1 ]]; then
39 # If we're compiling for MSVC then we, like most other distribution builders,
40 # switch to clang as the compiler. This'll allow us eventually to enable LTO
41 # amongst LLVM and rustc. Note that we only do this on MSVC as I don't think
42 # clang has an output mode compatible with MinGW that we need. If it does we
43 # should switch to clang for MinGW as well!
45 # Note that the LLVM installer is an NSIS installer
47 # Original downloaded here came from:
49 # https://github.com/llvm/llvm-project/releases/download/llvmorg-10.0.0/LLVM-10.0.0-win64.exe
51 # That installer was run through `wine ./installer.exe /S /NCRC` on Linux
52 # and then the resulting installation directory (found in
53 # `$HOME/.wine/drive_c/Program Files/LLVM`) was packaged up into a tarball.
54 # We've had issues otherwise that the installer will randomly hang, provide
55 # not a lot of useful information, pollute global state, etc. In general the
56 # tarball is just more confined and easier to deal with when working with
57 # various CI environments.
61 curl -f "${MIRRORS_BASE}/LLVM-${LLVM_VERSION}-win64.tar.gz" | tar xzf -
62 ciCommandSetEnv RUST_CONFIGURE_ARGS \
63 "${RUST_CONFIGURE_ARGS} --set llvm.clang-cl=$(pwd)/clang-rust/bin/clang-cl.exe"