Enable DD4hep by default
We agreed at the latest Core Software Meeting to switch, as of LCG 102, the default platforms to enable DD4hep and replace the special platforms +dd4hep
with +detdesc
equivalent ones for testing.
This MR changes the default of USE_DD4HEP
to true, while the new platforms are introduce in lcg-toolchains, see lhcb-core/lcg-toolchains!114 (merged).
I also switched specialized dd4hep
reference files with detdesc
ones.
In principle this should be merged when we switch the default LCG baseline to 102b or 103 (foreseen in January).
Edited by Marco Clemencic