on Linux turn-off the -Wl,--no-undefined linker flag when libPythia6 
is not provided at configure time.


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makeclingpch.sh is a replacement for rootcint_tmp (the replacement happens in meta's ModuleVars.mk)). It generates dict.pcm modules, similar to precompiled headers, for the headers passed as arguments.
TCintWithCling now imports all available modules from lib/.

Due to a bug in clang's module loading (http://llvm.org/bugs/show_bug.cgi?id=11236) which causes modules with STL to not load, disable the generation of the dict.pcm files for now.

One can nevertheless generate test "dictionaries" by running e.g.

clang++ -Xclang -emit-module -c -o $ROOTSYS/lib/header_dict.pcm -x c++ header.h

which will then automatically be loaded by TCintWithCling:

$ root -l -b
Info in <UnknownClass::LoadDictionaries>: Loading PCH DictTest_dict.pcm
root [0] DictTest o;
DictTest object has been created!

Still to be done: only import the module when its library is loaded (i.e. hook to TCint::Load())


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Add option 'par' in TFile::MakeProject to pack in a PAR file the generated
code. The first argument defines the directory and the name of the package.
For example, the following generates a PAR package equivalent to 
tutorials/proof/event.par :
  root [] TFile *f = TFile::Open("http://root.cern.ch/files/data/event_1.root")
  root [] f->MakeProject("packages/myevent.par", "*", "par");
Note that, because a PAR file is a tarball, for the time being, on Windows
only the package directory and the files are generated and a warning message
is printed.


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Initialize langopts more closely to what Tools.cpp (Clang::ConstructJob) is doing, to end up with a compatible LangOpt set in cling and PCHs.


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allowing to open ROOT files with UNC path on Windows when double-clicking
on them in the explorer.


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remove unused line.


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Running on Linux has shown a number missing fine tunings.


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add --vers-subdir.


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So I made all markers kDotLarge in a picker's buffer.


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Change return type of GetScale method to TString. Change of attributes and tags according to gdml schema (e.g. twistTrap -> twistedtrap, twist->Phitwis, ...). Change order of formula and name in creating TGeoElement.


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- Fixed the problem that the Fortran could be optional.  
- Fixed Cling option in core/meta package
- Fixed libraries to be linked when 'explicitlink' is enabled in cint/ROOT
- Generating ROOTConfig.cmake for use by CMake projects using ROOT.
  It is placed under ${CMAKE_INSTALL_PREFIX}/cmake directory 
  after installation or at top level of the build directory if using
  the build area.
  Project clients just need to add these lines in their CMakeLists.txt file: 
      find_package(ROOT REQUIRED)
      include(${ROOT_USE_FILE})
- Added new macro ROOT_ADD_TEST(...) to add tests into the project and
  a new script RootTestDrover.cmake 
- Added a new option 'testing' to enable CTest tests.
- Moved CPack setting to its own file in cmake/modules/RootCPack.make
- Moved CTest settings to its own file in cmake/modules/RootCTest.cmake
- Simplified the StandaloneBuild.cmake to make use of the new ROOTConfig.cmake
- Added the tests available in /test directory


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  Main principle of the error recovery is to revert the AST from the correct input combined with incorrect ones. Eg: [cling] int i; int j; error_here;
  This is the simplest case in which int i and int j has been eaten by the compiler but the overall input contains an error. In that case cling has to revert the entire transaction. That means that declarations of i and j must be removed from the compiler's AST and lookup tables.
  This is not trivial for situations like the following redeclaration:

    [cling] extern int i;
    [cling] int i = 0; error_here;

  In that situation we need to remove the definition of int i (line 2) but wire the lookup back to its extern declaration (line 1).
  Of course this could be more complex:

    [cling].rawInput 1
    [cling]! template<typename T> T TemplatedF(T t); // line 2
    [cling]! float OverloadedF(float f){ return f + 100.111f;} // line 3
    [cling].rawInput 0
    [cling] #include "LotOfOverloadsAndSpecializations.h" //line 5

    In that case we need to revert first all the instantiations and specializations (explicit and implicit!) caused by the line 5 and to rewire the lookup to template so that the user could further specialize or instantiate the template definition. In the case of overloads - similarly the same thing.

   So we have to have error recovery for each declaration kind that could cause "headache".

* Improve error recovery:
  - Add handling of overloaded functions, templated functions and templated function specializations
  - Add handling of variable declarations and redefinitions
  - Prepare the infrastructure for the more complex cases

* Add test cases for the work that has been done


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* AnonymousDecls test case wasn't correctly done, because definition of class/struct could be done in a function. In the particular case we defined the class in the function and that's why it didn't show up in the lookup.

Moreover the extraction of that class defined in a function fails. Thus move it to the pending to resolve issues.


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additional fixes for external xrootd.


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