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Cling Build Instructions

Building from source

Build script

You can download and run this build script.

Manual build

Alternatively, you can build manually. Start by checking out llvm, clang and cling:

git clone http://root.cern.ch/git/llvm.git src
cd src
git checkout cling-patches
cd tools
git clone http://root.cern.ch/git/cling.git
git clone http://root.cern.ch/git/clang.git
cd clang
git checkout cling-patches
cd ../..
Then use CMake to configure & build cling:
mkdir build
cd build
cmake -DCMAKE_INSTALL_PREFIX=[Install Path] -DCMAKE_BUILD_TYPE=[Build configuration, e.g. Release or Debug] ..\src
cmake --build .
cmake --build . --target install

cling-patches?

Cling needs a couple of patches on top of clang (but can work with an original build of llvm). These are the commits that above build instructions correspond to - which is mostly interesting to package maintainers:

Revisions / tags of llvm and clang to build a cling release.
cling releaseupstream llvm and clangcling-patches on clang
0.55.0 release series287240..27d2d5 (aka cling-patches-rrelease_50)