The getNameAsString interface causes a lot of temporary allocations.
The analysis if a decl is a cling-style wrapper can work only on a
simple declarations on the global scope.

This patch filters out complex declarations (eg in namespaces) and
checks only the identifier content.

The patch reduces the memory footprint difference shown in root-project/root#3012.

This allows TMVA to create a pool of threads on demand and fixes ROOT-10034

This reverts commit 3efc1356.

Duplicating Cling_Runtime and Cling_Runtime_Extra in both module.modulemap
and module.modulemap.build causes redefinition errors if -Dbuiltin_clang=Off.
We should not duplicate the cling runtime modules in both modulemaps.

This is a cherry pick of the loader.py in cppyy-backend
version clingwrapper-1.7.2, which has the new treatment of
CLING_STANDARD_PCH and its setting to 'none' to prevent
the PCH check by Cppyy.

A complete update will come for the three packages of Cppyy
once the functionality of this PR:
https://github.com/root-project/root/pull/3579
is merged into TCling.

Fix number of returned number of entries when adding TH2Poly's. Now SetBinContent change number of entries so the value must be computed before merging

This fixes ROOT-7608.
Move to protected also the functions of TH1 that do not make sense for TH2Poly.
Add a test for getting/setting the bin error

The issue is triggered when using the Python callable converter
of Cppyy.

The fix has been merged already in the CPyCppyy repo:
https://bitbucket.org/wlav/cpycppyy/pull-requests/18

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.

Instead of specifying the location of the PCH, we can just use
the magic word 'none' to tell cppyy not to check the PCH.
In both cases, the objective is to avoid a warning from cppyy
when importing it.

Tested with 6.16/00

When using RooAddPdfs in a convolution, it has to be ensured that the convolution observable remains the reference for interpreting the coefficients of the RooAddPdf. This is because a new binned range has to be constructed to perform discrete FFTs. Interpreting coefficients with respect to this internal range yields coefficients that depend on the properties of this range. This patch disentangles these.

ROOT-9653
ROOT-7183
ROOT-9419

to prevent silent corruption.

not to expose the user to the old name even in case of error.