listcomponents ignores custom libIRT2.so path

[veprbl]

Steps to reproduce: (give a step by step account of how to trigger the bug)

git clone git@github.com:eic/irt.git
git clone git@github.com:eic/epic.git

export CMAKE_INSTALL_PREFIX=$PWD/prefix
export LD_LIBRARY_PATH=$PWD/install/lib:$LD_LIBRARY_PATH
export JANA_PLUGIN_PATH=$PWD/install/lib/EICrecon/plugins

cmake -B irt/build -S irt -DDELPHES=OFF
cmake --build irt/build
cmake --install irt/build

cmake -B epic/build -S epic -DCMAKE_PREFIX_PATH=$PWD/install
cmake --build epic/build

Expected Result: (what do you expect when you execute the steps above)

Everything compiles

Actual Result: (what do you get when you execute the steps above)

[100%] Generating libepic.components
ERROR: failed to load libepic.so: /home/veprbl/for_alex/epic/build/lib/libepic.so: undefined symbol: _ZTVN4IRT23IRTE

[veprbl]

The workaround:

cmake --build epic/build || true
# https://github.com/AIDASoft/DD4hep/blob/1dc80f875613cf62f2f0da8b138a7fc60f27d1a6/cmake/DD4hep.cmake#L94-L98
# $<TARGET_FILE_DIR:DD4hep::DD4hepGaudiPluginMgr> puts /opt/local/lib in front of LD_LIBRARY_PATH
# so we workaround it by putting libIRT2.so to $<TARGET_FILE_DIR:${library}>
ln -s $PWD/install/lib/libIRT2.so epic/build/lib/libIRT2.so
cmake --build epic/build
cmake --install epic/build

[veprbl]

Maybe, a more correct way is to make sure that _IMPORT_PREFIX for DD4hep points to actual spack package path instead of the view.

[wdconinc]

I have something like this locally, to override what DD4hep does out of the box: (I didn't revisit this to test it, but I seem to recall this was added for a similar reason)

function(dd4hep_generate_rootmap library)

  if(APPLE)
    set(ENV_VAR DYLD_LIBRARY_PATH)
  else()
    set(ENV_VAR LD_LIBRARY_PATH)
  endif()
  set(${ENV_VAR}_VALUE $<TARGET_FILE_DIR:${library}>:$<TARGET_FILE_DIR:DD4hep::DD4hepGaudiPluginMgr>:$ENV{${ENV_VAR}})

  set(rootmapfile ${CMAKE_SHARED_MODULE_PREFIX}${library}.components)
  string(JOIN ":" LD_PRELOAD ${PRELOAD_SANITIZER_LIB})

  add_custom_command(OUTPUT ${rootmapfile}
                     DEPENDS ${library}
                     COMMAND ${ENV_VAR}=${${ENV_VAR}_VALUE} LD_PRELOAD=${LD_PRELOAD} $<TARGET_FILE:DD4hep::listcomponents> -o ${rootmapfile} $<TARGET_FILE_NAME:${library}>
                     WORKING_DIRECTORY ${LIBRARY_OUTPUT_PATH}
                     COMMAND_EXPAND_LISTS
                     )

  add_custom_target(Components_${library} ALL DEPENDS ${rootmapfile})
  SET( install_destination "lib" )
  if( CMAKE_INSTALL_LIBDIR )
    SET( install_destination ${CMAKE_INSTALL_LIBDIR} )
  endif()
  install(FILES $<TARGET_FILE_DIR:${library}>/${rootmapfile}
    DESTINATION ${install_destination}
  )
endfunction()