Cling Build Instructions

Binary releases of cling

You can find our nightly binary snapshots here

Building from source

Follow the procedure at the clang web page to check out the trunk of LLVM and clang from their subversion repositories. Check out the cling-compatible revision of clang and llvm, which can be found here . Check out cling right next to clang, i.e. into the tools/ subdirectory. Get it from here:

cd tools/clang/.. # i.e. next to clang
git clone http://root.cern.ch/git/cling.git
cd ..
cat tools/cling/patches/*.diff | patch -p0

Now follow the clang web page again for ./configure; make-based build instructions. You must specify --enable-targets=host to configure! And don't forget to make install. You will get a binary called cling: that's your interactive C++ interpreter!

Building ROOT6: cling as part of ROOT

Cling, llvm and clang are part of the trunk of ROOT. Simply run

svn co https://root.cern.ch/svn/root/trunk src
mkdir obj
cd obj
../src/configure
make -j4

and you will get a preview of ROOT 6: ROOT using cling!