Installing Clang¶
Installing Clang on Linux¶
Install the latest clang available in your package manager:
apt (Ubuntu/Debian):
sudo apt install clang
or install any version from llvm apt:
wget -O - https://apt.llvm.org/llvm.sh | sudo bash -s - 17
CMake¶
The following defines are required to instruct CMake on which compiler to use:
cmake -DCMAKE_CXX_COMPILER=clang++ ...
cmake -DCMAKE_CXX_COMPILER=clang++-17 ...
make¶
Set CXX=clang++ or CXX=clang++-17 environment variables before running make.
Installing Clang on macOS¶
On macOS clang is the default compiler and already included in the official Xcode toolchain. No additional setup required.
Installing Clang on Windows¶
CMake + Ninja¶
Download and install the latest win64 build from the official LLVM GitHub page:
https://github.com/llvm/llvm-project/releases
Visual Studio¶
In MSVC 2019 and 2022, there is built-in support for the Clang toolchain:
https://learn.microsoft.com/en-us/cpp/build/clang-support-msbuild?view=msvc-170 https://learn.microsoft.com/en-us/cpp/build/clang-support-cmake?view=msvc-170
LLVM/Clang has very good compatibility with the MSVC ABI and is widely used for building large projects on Windows (including Chrome). Therefore, switching to LLVM/Clang should not cause any compatibility problems.
Transparent Clang use (experimental)¶
Setting KFR_WITH_CLANG to ON instructs KFR to download Clang from the official GitHub, extract it to the build directory, and set all required CMake variables to enable its usage.
Works on Windows and Linux.
cmake -B build -GNinja -DKFR_WITH_CLANG=ON -DCMAKE_BUILD_TYPE=Release