Code for detector upgrades shall be developed in Detectors/Upgrades
and
DataFormats/Detectors/Upgrades
. It is compiled only if the CMake option
ENABLE_UPGRADES
is activated, e.g.
cmake -DENABLE_UPGRADES=ON <src dir>
Upgrade-only CMake instructions should be protected as:
if(ENABLE_UPGRADES)
# ...
endif(ENABLE_UPGRADES)
Individual pieces of code to be compiled only when upgrades are built are to be guarded by precompiler macros:
#ifdef ENABLE_UPGRADES
// ...
#endif
The corresponding compiler definition is added automatically and globally.