Always set TBB_LIBRARIES when TBB_FOUND (!1209) · Merge requests · Gaudi / Gaudi · GitLab

@clemenci This fixes the problem appearing in lhcb-gaussino slot built with LCG 99 and dd4hep.

https://lhcb-nightlies.web.cern.ch/nightly/lhcb-gaussino/932/LHCb/x86_64-centos7-gcc10-opt/build#Kernel/SOAContainer/submodules/SOAContainer/examples/nbody_5

Here, https://gitlab.cern.ch/gaudi/Gaudi/-/blob/master/cmake/modules/FindTBB.cmake#L123, TBB_LIBRARIES won't be set provided that TBB was found at some point before. This results in https://gitlab.cern.ch/LHCbOpt/SOAContainer/-/blob/master/examples/nbody/CMakeLists.txt#L15 not linking with tbb.