The name of the pretty printer script must match the name of the
binary, not a symlink. When soversion is used the unversioned .so file
is a symlink to the versioned library file.

This option is ported from ROOT 5.x but disabling it makes
compilation break since a long time. Fixes: ROOT-9449.

Previous version injected a literal "-e" through "echo -e".
Improve comment, use three spaces instead of tabs.

This adds gdb pretty printers for a few objects such as TString and TNamed, as well
as a couple of RooFit objects. gdb can automatically load them if gdb's `add-auto-load-safe-path`
is set to ROOT's lib directory. `print /r <obj>` allows to still print raw.

This was appending "roottest" to the filter string, instead of *also* filtering "roottest".
roottest dictionaries will always have full path names, so veto "/roottest/".
Fixes 19 incremental failures that ceb925ae claimed to fix:

    projectroot.roottest.root.meta.roottest_root_meta_drawing
    projectroot.roottest.root.tree.split.roottest_root_tree_split_make
    projectroot.roottest.root.treeformula.parse.roottest_root_treeformula_parse_make
    projectroot.roottest.root.treeformula.sync.roottest_root_treeformula_sync_make
    projectroot.roottest.root.tree.selector.roottest_root_tree_selector_make
    projectroot.roottest.root.io.fakeClass.roottest_root_io_fakeClass_make
    projectroot.roottest.root.tree.addresses.roottest_root_tree_addresses_make
    projectroot.roottest.root.treeformula.retobj.roottest_root_treeformula_retobj_make
    projectroot.roottest.root.treeproxy.roottest_root_treeproxy_make
    projectroot.roottest.root.treeformula.schemaEvolution.roottest_root_treeformula_schemaEvolution_make
    projectroot.roottest.root.tree.evolution.roottest_root_tree_evolution_make
    projectroot.roottest.root.treeformula.array.roottest_root_treeformula_array_make
    projectroot.roottest.root.meta.tclass.roottest_root_meta_tclass_execState
    projectroot.roottest.root.meta.roottest_root_meta_runautoload_auto
    projectroot.roottest.root.collection.roottest_root_collection_execMissing
    projectroot.test.test_stresstmva_interpreted
    projectroot.roottest.root.io.evolution.roottest_root_io_evolution_make
    projectroot.roottest.root.io.datamodelevolution.roottest_root_io_datamodelevolution_make
    projectroot.roottest.root.tree.friend.roottest_root_tree_friend_make.

This fixed 19 sporadic errors seen in the incrementals:
    projectroot.roottest.root.collection.roottest_root_collection_execMissing
    projectroot.roottest.root.meta.roottest_root_meta_drawing
    projectroot.roottest.root.meta.roottest_root_meta_runautoload_auto
    projectroot.roottest.root.io.fakeClass.roottest_root_io_fakeClass_make
    projectroot.roottest.root.tree.split.roottest_root_tree_split_make
    projectroot.roottest.root.tree.selector.roottest_root_tree_selector_make
    projectroot.roottest.root.treeformula.sync.roottest_root_treeformula_sync_make
    projectroot.roottest.root.treeformula.parse.roottest_root_treeformula_parse_make
    projectroot.roottest.root.treeformula.retobj.roottest_root_treeformula_retobj_make
    projectroot.roottest.root.treeformula.schemaEvolution.roottest_root_treeformula_schemaEvolution_make
    projectroot.roottest.root.tree.addresses.roottest_root_tree_addresses_make
    projectroot.roottest.root.treeproxy.roottest_root_treeproxy_make
    projectroot.roottest.root.tree.evolution.roottest_root_tree_evolution_make
    projectroot.roottest.root.treeformula.array.roottest_root_treeformula_array_make
    projectroot.roottest.root.meta.tclass.roottest_root_meta_tclass_execState
    projectroot.roottest.root.io.evolution.roottest_root_io_evolution_make
    projectroot.roottest.root.io.datamodelevolution.roottest_root_io_datamodelevolution_make
    projectroot.test.test_stresstmva_interpreted
    projectroot.roottest.root.tree.friend.roottest_root_tree_friend_make
Caused by having roottest/root/tree/cache/Event.h in the PCH.
It ended up there since 6aa6e3e85bda2b3474eb46f38cb857e718c838cd in roottest, which renamed the
dictionary from roottest/root/tree/cache/ to match the search pattern of makepchinput.py.

Before, makepchinput.py was not removing some files because they were misnamed (allLinkDef.h vs allLinkDefs.h, cppflags.txt vs allCppflags.txt).
Now, let the caller send consistent file names for "remove old files".
Remove duplicate allDict.cxx.h (sic!) removal.
Also remove allDict.cxx.pch which seems to exist, sometimes?

Also, make sure CPyCppyy headers are in the PCH.

This commit contributes to fix the roottest-python-cling tests,
which use TPython, now part of CPyCppyy.

Can cause unnecessary extra linking to system libraries. We should
add linking libraries directly to each target that needs it.

Not expose ROOT/RConfig.h to rootcling, but to add the header to
ROOT_Config pcm.

This patch includes:
- Remove existing modulemap.overlay files
  Cling now can generate virtual overlay files on-demand.
- Implement `-modulemap_overlay` flag to Cling
  This flag is used to tell Cling the location of modulemaps to be
  overlayed. (eg. stl.modulemap, libc.modulemap)
- Generate and load virtual modulemap in Cling
  It is in Interpreter constructor, happens as part of cxxmodules
  initialization step.
- Implement an interface to Clang CompilerInvocation which can take FileSystem pointer
  Previously, Clang only took a "string of filenames" which clearly doesn't
  work for our usecase. We already discussed this new interface at
  modules meeting, so this change will land upstream.
- Add a file existence check in Clang
  When compiling a pcm and when Clang saw the #include with which pcm was available
  (or being generated implicitly), Clang was putting a notation of the full path to this pcm.
  This caused an error when build directory was deleted, because the path didn't exist anymore.

This patch enables modules to be binary distributed, and to make it
work in CMSSW enviroment.

On UNIX, build/unix/compiledata.sh is used, while on
Windows, cmake/scripts/compiledata.win32.in is used.

The aim of this patch is to make runtime modules "installable".

Previously, modulemap.overlay.yaml file was being generated by cmake
__only__ for build directory. So the path/to/your/build/directory was
hardcoded to modulemap.overlay.yaml and Cling was reading modulemap for
stl and libc from the build directory even if it was installed to different
location.

This was a problem for CMSSW, so in this patch I'm generating two
overlay files, one for build directory and other one for installed
directory. CMake will generate modulemap.overlay.yaml for __build__
directory from modulemap.overlay.yaml.in.build at compilation time, and
it will generate and install modulemap.overlay.yaml for __install__
directory from modulemap.overlay.yaml.install.

The script git_coreteam.py uses outdated gitstats information
from the web, while the new script uses the git shortlog from the
repository itself (with a little help of recently added .mailmap).

Instead of removing the *.pyc file in argparse2help.py,  we avoid to generate such files
by invoking argparse2help.py with option -B.

- remove trailing white spaces.

Implement an "argparse" unique description of man pages and usage for root commands.