Requires nlohmann_json::nlohmann_json when built outside of eic_shell #117
Description
When is built outside of EICShell the build fails with:
CMake Error at /home/romanov/soft/edm4hep/edm4hep-install/lib/cmake/EDM4HEP/EDM4HEPTargets.cmake:61 (set_target_properties):
The link interface of target "EDM4HEP::edm4hep" contains:
nlohmann_json::nlohmann_json
but the target was not found. Possible reasons include:
* There is a typo in the target name.
* A find_package call is missing for an IMPORTED target.
* An ALIAS target is missing.
Call Stack (most recent call first):
/home/romanov/soft/edm4hep/edm4hep-install/lib/cmake/EDM4HEP/EDM4HEPConfig.cmake:43 (include)
CMakeLists.txt:37 (find_package)
Adding nlohmann_json fixes the build
find_package(nlohmann_json) # not REQUIRED