cling/README.md

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##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:  
```bash
    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:  
   
```bash
    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):  

```bash
    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/