cmake -B build-runtime -S ./runtimes -G Ninja \
-DCMAKE_BUILD_TYPE=Release \
-DLLVM_ENABLE_PROJECTS="clang" \
-DLLVM_ENABLE_RUNTIMES="compiler-rt;libc;libcxx;libcxxabi;libunwind" \
-DLIBCXX_ENABLE_SHARED=ON \
-DCMAKE_CXX_FLAGS="${CMAKE_CXX_FLAGS} -w" \
-DCMAKE_C_COMPILER=clang \
-DCMAKE_CXX_COMPILER=clang++ \
-DLLVM_USE_LINKER=lld
cmake --build build-runtime
cmake --build build-runtime --target install