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gc5
Asked: 2014-01-17 14:17:21 +0800 CST

How to install cling?

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I am trying to install cling in Ubuntu 12.04. I thought that the proper way was to download the binaries, as they are available here, but the extracted folder looks like this:

~/Desktop/cling » ls      
bin  docs  include  lib  share

This requires, I think, to merge the directories content with some directories of my filesystem. I am not familiar with this method but it seems to me a bit dirty; how can I install it, upgrade it, delete it?

I was thinking about packaging it with a deb, but I never did one so I do not know if it is the correct way..

Is there a better way to install cling?

software-installation

3 Answers

  1. Cling now provides binary snapshots for Ubuntu (as well as Fedora and OSX) which you can find here https://root.cern.ch/download/cling

    For example if you are on ubuntu 16 (or newer?):

    sudo apt install -y wget unar
wget https://root.cern/download/cling/cling_2020-11-05_ROOT-ubuntu2004.tar.bz2
unar cling_2020-11-05_ROOT-ubuntu2004.tar.bz2
./cling_2020-11-05_ROOT-ubuntu2004/bin/cling
    • 10

  2. Ok, this is not a weekend project and apparently it needs too many stuff to be installed before operative. So, I haven't tested this myself, but is what the instructions says (+ some bits of Ubuntu):

    Get the tools first, you need some other may be installed on your system, so to prevent this just:

    sudo apt-get install build-essential zlib-bin zlib1g-dev subversion texinfo git

    Now, create a directory empty to do your experiment:

    mkdir ~/cling-clang
cd ~/cling-clang

    This step will take a while if you have slow connection (please use one line at time):

    svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm
cd llvm/tools
svn co http://llvm.org/svn/llvm-project/cfe/trunk clang
git clone http://root.cern.ch/git/cling.git
cd ..
cat tools/cling/patches/*.diff | patch -p0
cd ../llvm/projects
svn co http://llvm.org/svn/llvm-project/compiler-rt/trunk compiler-rt
cd ../..
mkdir build
cd build

    Now start the fun. If nothing of the above failed you can continue:

    ../llvm/configure --enable-targets=host
make

    This will build LLVM, Clang and Cling. There should be a package maintainer that do this stuff for Debian/Ubuntu, I tip my hat off. This will have the Cling built, but not installed. You may want to use checkinstall instead of sudo make install.

    • 9

  3. cling is now packaged for GNU Guix and Guix can be installed on top of any GNU/Linux distribution such as Ubuntu.

    After you've gone through the binary installation of Guix as documented here: https://guix.gnu.org/manual/en/html_node/Binary-Installation.html, you can install cling via:

    $ guix install cling

    And verify that it works with:

    $ cling '#include <stdio.h>' 'printf("Hello World!\n");'
Hello World!

    Hopefully that should save you some time compared to building Cling/LLVM from source.

    • 1