cling

Cling - The Interactive C++ Interpreter

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README.md

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##DESCRIPTION Cling is an interactive C++ interpreter, built on top of Clang and LLVM compiler infrastructure. Cling realizes the read-print-evaluate-loop concept, in order to leverage rapid application development. Implemented as a small extension to LLVM and Clang, the interpreter reuses their strengths such as the praised concise and expressive compiler diagnostics.

Further information & demos

Please note that some of the resources are rather old and most of the stated limitations are outdated.

##INSTALLATION ###Binaries We offer binary snapshots for download at https://ecsft.cern.ch/dist/cling

###Source CLING source depends on the LLVM[1] and CLANG[2] headers and libraries. You will also need CMake[3] >= 2.6.1 or GNU Make to build all of those packages and subversion[4] and git[5] to get the source code.

[1] http://llvm.org [2] http://clang.llvm.org [3] http://cmake.org [4] http://subversion.tigris.org [5] http://git-scm.com

####Building Building LLVM and CLANG you must:

Check out the sources:

    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

Configure, build and install them, either using CMake:

    cd ..
    mkdir build
    cd build
    cmake -DCMAKE_INSTALL_PREFIX=/some/install/dir \
          -DLLVM_TARGETS_TO_BUILD=CBackend\;CppBackend\;X86 \
          -DCMAKE_BUILD_TYPE=Debug \
          ../src
    make
    make install

or GNU Make (see ../src/configure --help for all options):

    cd ..
    mkdir build
    cd build
    ../src/configure --prefix=/some/install/dir
    make
    make install

##USAGE To get started run: /some/install/dir/bin/cling --help or type /some/install/dir/bin/cling [cling]$ .help

##DEVELOPERS' CORNER: We have doxygen documentation of cling's code at: http://cling.web.cern.ch/cling/doxygen/ ###CONTRIBUTIONS Every contribution is very welcome. It is considered as a donation and its copyright and any other related rights become exclusive ownership of the person merged the code or in any other case the main developers. In order for a contribution to be accepted it has to obey the previously established rules for contribution acceptance in cling's work flow and rules.