安装clang

clang 安装方式 官网提供一下两种安装方式，及默认安装和自动脚本安装。两种安装方式本质上并没有什么不同。

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apt-get install clang-format clang-tidy clang-tools clang clang libc++-dev libc++1 libc++abi-dev libc++abi1 libclang-dev libclang1 liblldb-dev libllvm-ocaml-dev libomp-dev libomp5 lld lldb llvm-dev llvm-runtime llvm python3-clang

安装的版本版本为仓库默认版本，需要 添加以下源 来选择不同版本

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deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic main
deb-src http://apt.llvm.org/bionic/ llvm-toolchain-bionic main
# Needs 'sudo add-apt-repository ppa:ubuntu-toolchain-r/test' for libstdc++ with C++20 support
# 16
deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-16 main
deb-src http://apt.llvm.org/bionic/ llvm-toolchain-bionic-16 main
# 17
deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-17 main
deb-src http://apt.llvm.org/bionic/ llvm-toolchain-bionic-17 main
deb http://apt.llvm.org/focal/ llvm-toolchain-focal main
deb-src http://apt.llvm.org/focal/ llvm-toolchain-focal main
# 16
deb http://apt.llvm.org/focal/ llvm-toolchain-focal-16 main
deb-src http://apt.llvm.org/focal/ llvm-toolchain-focal-16 main
# 17
deb http://apt.llvm.org/focal/ llvm-toolchain-focal-17 main
deb-src http://apt.llvm.org/focal/ llvm-toolchain-focal-17 main
deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy main
deb-src http://apt.llvm.org/jammy/ llvm-toolchain-jammy main
# 16
deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-16 main
deb-src http://apt.llvm.org/jammy/ llvm-toolchain-jammy-16 main
# 17
deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-17 main
deb-src http://apt.llvm.org/jammy/ llvm-toolchain-jammy-17 main
deb http://apt.llvm.org/lunar/ llvm-toolchain-lunar main
deb-src http://apt.llvm.org/lunar/ llvm-toolchain-lunar main
# 16
deb http://apt.llvm.org/lunar/ llvm-toolchain-lunar-16 main
deb-src http://apt.llvm.org/lunar/ llvm-toolchain-lunar-16 main
# 17
deb http://apt.llvm.org/lunar/ llvm-toolchain-lunar-17 main
deb-src http://apt.llvm.org/lunar/ llvm-toolchain-lunar-17 main
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bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)"

安装的版本版本为最新的稳定版， 若想指定安装版本可以使用以下方式安装

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bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)" 16 all

设置clang 为默认的编译器

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sudo update-alternatives --install /usr/bin/cc cc /usr/bin/clang 100
sudo update-alternatives --install /usr/bin/c++ c++ /usr/bin/clang++ 100