Package Coordinators: Marco Clemencic, Charles Leggett

Release Notes

Improvements, modernization and fixes (see all changes).

Changed

Reorganization of Gaudi::Parsers code (mr !759)
Update LCG to 94 and Gaudi version to v30r4 (mr !776)
Update minimum required CMake version to 3.6 (mr !789)
Remove m_event_context from Algorithm (mr !784)
Reimplementation of DataHandle (mr !462)
Improve extension API in EventContext (mr !770)
Change return type of interger counters operations, like mean, to float (mr !786, issue #50)
Clean up IDataProviderSvc and IDataManagerSvc interfaces (mr !674)
Avoid printing empty counters (mr !777)
Use unique_ptr for EventContexts (mr !732, issue #37)
ConcurrencyFlags: move setting from AvalancheScheduler to HiveWhiteBoard (mr !726)
Introduce a generic IDataStoreAgent implementation (mr !661)
MetaDataSvc: save data for all clients of the JobOptionsSvc (mr !720)
Adding actual type of object in data store to error messages (mr !715)

Add Gaudi::Property constructors which accept an update handler (mr !769)
Optionally capture and print exception backtrace (mr !653)
Add build and runtime support for gcc/clang sanitizers (mr !744)
Add debug builds to Gitlab-CI and other improvements to CI configuration (mr !756)
Introduce IDataBroker interface, and HiveDataBroker implementation (mr !685, mr !739)
Added an accumulate helper function to new counters (mr !717)

HiveWhiteBoard::freeStore: check whether slot was already free (mr !779, issue #49)
Fix segfault when scheduling EventViews (mr !781)
Fixed bug in BinomialCounter when using buffer (mr !764)
Clarify scalar operator() signature in MultiScalarTransform (mr !755)
Fix potential race condition in TimelineSvc (mr !750)
Implicitly convert DataObjectHandleBase to str properties (mr !773)
Filter out install and build files from make apply-formatting (mr !747, )
Fixed issues reported by gcc/clang sanitizers (mr !749, mr !757, mr !758, mr !752, mr !751, mr !746, mr !772, mr !753)
Make sure a test fails if its reference file is not found (mr !734)
Fix Floating Point Exception in counters.h (mr !760)
Make the CMake tests more resilient to symlinks (mr !742)
Add support for versioned ROOT libraries (mr !737)
Make event views bookkeeping thread-safe (mr !729, issue #36)
Avoid using a (possibly invalid) EventContext pointer (mr !727)
Mark dependencies as required when the build requires them (mr !731)
Use std::filesystem only with C++17 (mr !738)
Fixed indentation of new counters to be backward compatible (mr !717)
Fixed error handling of qmt parsing errors (mr !714)
Stop profiling on finalize if needed (mr !713)
THistSvc: fix memory corruption in deReg(string) (mr !728)
Avoid possible memory corruption in PluginService (mr !733)
Added correct vector_of_const_::operator[] and ::at (mr !710)