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

The OSX linker stores the symbols in a shared library by adding an
extra "_" as prefix to the mangled name. However, the llvm JIT gives
us a unix mangled name.

This patch adds a the missing extra prefix if we are on OSX.

The old location excluded them only from the modulemap however
rootcling still tried to build a module for them.

the simulated annealing minimizer algorithm from GSL.
This fixes ROOT-4880

Checking with output plot the result obtained now it is correct, while it wasn't really before. Onother crossing points for the limit was found but at a lower valuie.

Fix also root finding in roostats in hypotestinverter that edges are returned when interval does not contain a root. 

This commit provides improvement to the BrentRootFinder and to TF1::GetX which uses it.
Now the bracketing is improved and the algorithms find in case of multiple roots the one with lower x value. 
In case the interval does not contain a ROOT an error message is produced and a NaN is returned instead of returning a random value as before.
This commit fixes the problem reported in 
ROOT-4998

The current test. testRootFinder is improved using gtest and adding the case of multiple roots and of log grid searchj that BrentRootFinder supports. 

(cherry picked from commit 5083cf55)

1. Strings enclosed in double quotes are supported as much as strings enclosed in single quotes.
2. It is not an error if during the parsing of a number after ".e" comes a non-digit: it could be a method or a column name.

Omit explicit import of TIter since this triggers cppyy to fetch the class upon importing ROOT. Acessing TIter through cppyy.gbl.TIter does the same job lazily.

...and test

...and test

If the comment is left in the code, the html documentation renderer shows it
as part of the next member function which is misleading.

...and add test coverage

Default GDML import units restored to Geant4 ones. Can be changed before import using TGeoManager::SetDefaultRootUnits().

This is to avoid direct linking to TBB in e.g. libTree,
since TBB should be encapsulated by libImt.

This is to avoid direct linking to compression libraries
in libraries that link to libCore.

Without using '^' and '$', the regular expression also
matches things that contain the keywords, like FILESYSTEM.

The following example shows the improvement.

{
   auto h = new TH1F("h","h",5,0.5,5.5);
   h->SetBinContent(1,100000);
   h->SetBinContent(2,10000);
   h->SetBinContent(3,1000);
   h->SetBinContent(4,100);
   h->SetBinContent(5,10);
   h->SetMinimum(50.);
   h->SetMaximum(40000);
   h->Draw("L*");
   gPad->SetLogy();
}

It is equivalent to gStyle->SetHistMinimumZero(1), 
but can be specified individually for histogram

For the moment it is just  gStyle->GetHistMinimumZero() value

Fix the exclusion of underflow bin (and include the last bin) when computing the shortest interval in the BayesianCalculator  (#3402)

* fix a bug in excluding underflow bin when computing shortest interval in BayesianCalculator::ComputeShortestInterval. This fixes problem reported in ROOT-4619

* update refeerence file for changes in Bayesian shortest interval after bug fix

* Revert "update refeerence file for changes in Bayesian shortest interval after bug fix"

This reverts commit d51c85a5ac1a32161d6e66d10b9426d242591d0c.

* Add another fix in computation of the shortest interval in the BayesianCalculator. 

- The computed interval was shifted by one bin. 
- The reference file did not need to be updates since the reference results are hard coded and taken from a paper.   
- Add now a new method returning the histogram approximating the posterior.
- Increase the number of bins when computing the posterior histogram in stressRooStats