Building Clang from source - ClangBuiltLinux/linux GitHub Wiki
If you would like to build Clang (and lld) from source for testing purposes, it is really easy! You should have cmake
and ninja
installed from your distribution.
$ git clone git://github.com/llvm/llvm-project
$ cd llvm-project
$ mkdir build
$ cd build
$ cmake -G Ninja \
-DCMAKE_BUILD_TYPE=Release \
-DLLVM_ENABLE_PROJECTS="clang;lld;compiler-rt" \
-DLLVM_ENABLE_WARNINGS=OFF \
../llvm
$ ninja
You are interested in more optimized binaries and faster compile times? You are invited to use tc-build!
$ git clone https://github.com/ClangBuiltLinux/tc-build
$ cd tc-build
$ ./build-llvm.py
If you do not have as powerful of a machine or are time restricted in some other way, you can build just Clang and LLD in a "stage 1" configuration (rather than the default of building a smaller clang
and lld
to build a fuller LLVM toolchain afterwards).
$ ./build-llvm.py --projects clang lld --build-stage1-only
Please see that repo's README for more information on properly using it.