Tag to be used with the master branch of atlas/athena.
Update(s) since 2.0.33:
  - Further dependency fixes for the PyModules package, adding mccabe and backports as explicit dependencies for it.

Tag to be used with the master branch of atlas/athena.
Update(s) since 2.0.32:
  - Added a find-module for the functools32 python module/package;
  - Extended PyModules to explicitly declare all the python modules that it depends on from LCG.

Tag to be used with the master branch of atlas/athena.
Update(s) since 2.0.31:
  - Added PyModules and flake8_atlas to the AthSimulationExternals project.

Tag to be used with the master branch of atlas/athena.
Update(s) since 2.0.30:
  - Updated the PyModules package to use pip for installing flake8;
  - Introduced the flake8_atlas package;
  - Added a find-module for the futures python package;
  - Made a number of updates in AnalysisBaseExternals to make it build with GCC 8 in C++17 mode.

Tag to be used with the 21.X branches of atlas/athena.
Updates in this tag:
  - Updated KLFitter to version 1.3.2;
  - Added the correct LHAPATH from CVMFS to the environment;
  - Added extra find-modules for setting up python packages from LCG_95;
  - Updated lwtnn to version 2.9.

Tag to be used with the master branch of atlas/athena.
Update(s) since 2.0.29:
  - Fixed the dependency setup of the CINT dictionary generation to watch for changes in the used header files.

Tag to be used with the master branch of atlas/athena.
Update(s) since 2.0.28:
  - Added the PyModules package to build python modules needed by the Athena project;
  - Updated KLFitter to version 1.3.2;
  - Various updates to CheckerGccPlugins;
  - Updated Acts to version 0.9.2;
  - Added find-modules for pandas and sqlalchemy in AtlasLCG.

Tag to be used with the 21.X branches of atlas/athena.
Updates in this tag:
  - Backported the CMake 3.13 updates from the master branch;
  - Backported AtlasLCG changes necessary for LCG_95;
  - Updated lwtnn to version 2.8.1;
  - Taught AtlasCMake to remove stale .pyc files in incremental builds;
  - Updated AnalysisBaseExternals and AthAnalysisExternals to use LCG_95.

Tag to be used with the master branch of atlas/athena.
Update(s) since 2.0.27:
  - A *lot* of updates in AtlasCMake. Tried to clean up the code in a lot of different ways;
  - Updated all LCG based projects to use LCG_95 by default;
  - Updated all "standalone externals" to be in sync with their LCG_95 versions.

Tag to be used with the master branch of atlas/athena.
Update(s) since 2.0.26:
  - Made CheckerGccPlugins only work with GCC 8, and implemented a new fix for one of its checks;
  - Updated to lwtnn 2.8.1;
  - Updated to Acts 0.8.2;
  - Added prmon to AthSimulationExternals and AthDerivationExternals;
  - Taught the CMake configuration step clean out any stale .pyc files from the build directory, whose .py files have been removed from the source.

Tag to be used with the 21.X branches of atlas/athena.
Updates in this tag:
  - Added FindHJets.cmake for finding the HJets generator;
  - Fixed the generation of .d files for Ninja, to make dictionary generation behave correctly with this build tool;
  - Added some extra find-modules to AtlasLCG;
  - Stopped setting up the Cairo and Pango packages when using graphviz.

Tag to be used with the master branch of atlas/athena.
Update(s) since 2.0.25:
  - Added FindHJets.cmake for finding the HJets generator;
  - Added prmon as a new external to AthenaExternals;
  - Fixed the generation of .d files for Ninja, to make dictionary generation behave correctly with this build tool;
  - Updated FindQt5.cmake to both fix a bug in it, and to make it create "simple" variables for the include directories and linked libraries to use.

Tag to be used with the master branch of atlas/athena.
Update(s) since 2.0.24:
  - Added Findcx_Oracle.cmake, Finddecorator.cmake and Findpyxml.cmake, as these LCG python packages are used without explicit declarations in some Athena packages.

Tag to be used with the master branch of atlas/athena.
Update(s) since 2.0.23:
  - Updated CheckerGccPlugins to ignore the usage of gSystem;
  - Fixed the setup of QT5_LIBRARY_DIRS in FindQt5.cmake;
  - Stopped setting up the Cairo and Pango packages when using graphviz.

Tag to be used with the master branch of atlas/athena.
Update(s) since 2.0.22:
  - Updated CheckerGccPlugins;
  - Update to CLHEP to CLHEP_2_4_0_1_atl02 to fix the bug reported in CLHEP-154;
  - Updated AtlasCMake/AtlasLCG to use C++17 by default, with all compilers;
  - Added nlohmann_parser as a new external;
  - Added VP1LightExternals, with some new external packages;
  - Updated AtlasLCG to provide find-modules for all the new python modules/externals introduced with LCG_95.

Tag to be used with the master branch of atlas/athena.
Update(s) since 2.0.21:
  - Various updates to CheckerGccPlugins;
  - Fixes to the standalone ROOT build;
  - Fixes to Reflex dictionary builds, including how Ninja builds are done;
  - Updates to the locations where some LCG externals are picked up from.

Tag to be used with the 21.X branches of atlas/athena.
Updates in this tag:
  - Updated the location from which some "older" LCG packages get picked up, so they would now be picked up from EOS.

Tag to be used with the 21.X branches of atlas/athena.
Updates in this tag:
  - Updated the Davix and ROOT build configurations to make ROOT find our version of Davix successfully once more;
  - Fixed an issue with the Reflex dictionary builds that made compilation impossible on macOS.

Tag to be used with the master branch of atlas/athena.
Update(s) since 2.0.20:
  - Introduced fixes for AnalysisBaseExternals on Ubuntu and macOS;
  - Added FindCURL.cmake to AtlasLCG to be able to use CURL from the LCG releases if necessary;
  - Updated the code handling Doxygen to work successfully with LCG_94;
  - Added a lot of CMake changes to make the code work smoothly with CMake >=3.13.

Tag to be used with the 21.X branches of atlas/athena.
Updates in this tag:
  - Introduced the LCG_IGNORED_SYSTEM_PATHS and LCG_SYSTEM_IGNORE_PATH variables for blacklisting selected directories when searching for externals;
  - Various fixes meant for macOS;
  - Fixed Davix-0.7.1's build in the absence of a python interpreter;
  - Added some fixes to how Doxygen is used by atlas_project(...).