AnalysisBase Threads Fix, master branch (2020.05.25.)

In order to compile client code (or partially compile packages of this repository) against an AnalysisBase release/nightly, all imported targets used by the targets exported by AnalysisBase must be available.

This addition takes care of that, providing the Threads::Threads imported target to the CMake configuration of AnalysisBase.

Note that in the 21.2 branch this is instead done in the post-configuration file. (https://gitlab.cern.ch/atlas/athena/-/blob/21.2/Projects/AnalysisBase/PostConfig.cmake.in) But experience with imported targets and partial builds in master taught me that it's more robust to do it during "pre-configuration" instead.

Thanks to @nkoehler and @mkbugge for reporting the issue.

added bugfix label

This merge request affects 1 package:

• Projects/AnalysisBase

Adding @krumnack ,@akraszna ,@rbianchi as watchers

added Build master review-pending-level-1 labels

CI Result SUCCESS (hash c39297dd)

	Athena	AthSimulation	AnalysisBase	AthGeneration
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 14537]

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 061f34f2

added sweep:ignore label