message: Do not install some TPC files from GitHub version
  See Required ones will still be installed and cause an error if
  they are not present.
diff: @@ -32,20 +32,15 @@ install(DIRECTORY mapping DESTINATION TPC)
  install(DIRECTORY macros DESTINATION TPC)
  # Install root & dat files
  -set(ROOTFILES
  - AliTPCprf2dGEM.root
  - AliTPCprf2d.root
  - CovMatrixDB_PbPb6000_B0.4T.root
  - CovMatrixDB_pp_B0.4T.root
  - )
  -set(DATFILES
  - conn_iroc.dat
  - conn_oroc.dat
  - )
  +# The following two data files are required (ALIROOT-7111)
  +install(FILES AliTPCprf2dGEM.root AliTPCprf2d.root DESTINATION TPC)
  -if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/AliTPCprf2dGEM.root)
  - install(FILES ${ROOTFILES} ${DATFILES} DESTINATION TPC)
  +# The following data files are optional
  +foreach(DATA_FILE CovMatrixDB_PbPb6000_B0.4T.root CovMatrixDB_pp_B0.4T.root conn_iroc.dat conn_oroc.dat)
  + if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${DATA_FILE})
  + install(FILES ${DATA_FILE} DESTINATION TPC)
  elseif(FATAL_IF_MISSING)
  - message(FATAL_ERROR "AliTPCprf2dGEM.root is missing")
  + message(FATAL_ERROR "${DATA_FILE} is missing")
  endif()
  +endforeach()
  