git clone https://github.com/llvm/llvm-project.git
cd llvm-project
git fetch origin "release/18.x"
git checkout -b release refs/tags/llvmorg-18.1.6
mkdir build
cd build
cmake -D CMAKE_BUILD_TYPE=Release -D LLVM_ENABLE_PROJECTS="clang;clang-tools-extra;compiler-rt" -G "Unix Makefiles" ../llvm
time make -j$(nproc)
time make check-clang -j8
time make check-ubsan -j8
time make check-asan  -j8
cmake --install . --prefix ~/bin/llvmclang-18.1.6
ln -s ~/bin/llvmclang-18.1.6/bin/clang-check  ~/bin/clang-check-18
ln -s ~/bin/llvmclang-18.1.6/bin/clang-tidy   ~/bin/clang-tidy-18
ln -s ~/bin/llvmclang-18.1.6/bin/clang-format ~/bin/clang-format-18
ln -s ~/bin/llvmclang-18.1.6/bin/clang        ~/bin/clang-18
ln -s ~/bin/llvmclang-18.1.6/bin/clang++      ~/bin/clang++-18