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#!/bin/bash
# ignore-tidy-linelength
# This script installs clang on the local machine. Note that we don't install
# clang on Linux since its compiler story is just so different. Each container
# has its own toolchain configured appropriately already.
set -euo pipefail
IFS=$'\n\t'
source "$(cd "$(dirname "$0")" && pwd)/../shared.sh"
# Update both macOS's and Windows's tarballs when bumping the version here.
LLVM_VERSION="14.0.5"
if isMacOS; then
# If the job selects a specific Xcode version, use that instead of
# downloading our own version.
if [[ ${USE_XCODE_CLANG-0} -eq 1 ]]; then
bindir="$(xcode-select --print-path)/Toolchains/XcodeDefault.xctoolchain/usr/bin"
else
file="${MIRRORS_BASE}/clang%2Bllvm-${LLVM_VERSION}-x86_64-apple-darwin.tar.xz"
retry curl -f "${file}" -o "clang+llvm-${LLVM_VERSION}-x86_64-apple-darwin.tar.xz"
tar xJf "clang+llvm-${LLVM_VERSION}-x86_64-apple-darwin.tar.xz"
bindir="$(pwd)/clang+llvm-${LLVM_VERSION}-x86_64-apple-darwin/bin"
fi
ciCommandSetEnv CC "${bindir}/clang"
ciCommandSetEnv CXX "${bindir}/clang++"
# macOS 10.15 onwards doesn't have libraries in /usr/include anymore: those
# are now located deep into the filesystem, under Xcode's own files. The
# native clang is configured to use the correct path, but our custom one
# doesn't. This sets the SDKROOT environment variable to the SDK so that
# our own clang can figure out the correct include path on its own.
ciCommandSetEnv SDKROOT "$(xcrun --sdk macosx --show-sdk-path)"
# Configure `AR` specifically so rustbuild doesn't try to infer it as
# `clang-ar` by accident.
ciCommandSetEnv AR "ar"
elif isWindows && [[ ${CUSTOM_MINGW-0} -ne 1 ]]; then
if [[ ${WINDOWS_SDK_20348_HACK-0} -eq 1 ]]; then
rm -rf '/c/Program Files (x86)/Windows Kits/10/include/10.0.20348.0'
mv '/c/Program Files (x86)/Windows Kits/10/include/'10.0.{19041,20348}.0
fi
# If we're compiling for MSVC then we, like most other distribution builders,
# switch to clang as the compiler. This'll allow us eventually to enable LTO
# amongst LLVM and rustc. Note that we only do this on MSVC as I don't think
# clang has an output mode compatible with MinGW that we need. If it does we
# should switch to clang for MinGW as well!
#
# The LLVM installer is an NSIS installer, which we can extract with 7z. We
# don't want to run the installer directly; extracting it is more reliable
# in CI environments.
mkdir -p citools/clang-rust
cd citools
retry curl -f "${MIRRORS_BASE}/LLVM-${LLVM_VERSION}-win64.exe" \
-o "LLVM-${LLVM_VERSION}-win64.exe"
7z x -oclang-rust/ "LLVM-${LLVM_VERSION}-win64.exe"
ciCommandSetEnv RUST_CONFIGURE_ARGS \
"${RUST_CONFIGURE_ARGS} --set llvm.clang-cl=$(pwd)/clang-rust/bin/clang-cl.exe"
# Disable downloading CI LLVM on this builder;
# setting up clang-cl just above conflicts with the default if-available option.
ciCommandSetEnv NO_DOWNLOAD_CI_LLVM 1
fi
if isWindows; then
# GitHub image 20210928.2 added LLVM, but it is broken (and we don't want
# to use it anyways).
rm -rf /c/Program\ Files/LLVM
fi
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