set(foo_SOURCES  Output_HepMC2_Genevent.C Output_HepMC2_Short.C Output_HepMC3_Genevent.C Output_HepMC3_Short.C)
 set(foo_HEADERS  Output_HepMC2_Genevent.H Output_HepMC2_Short.H Output_HepMC3_Genevent.H Output_HepMC3_Short.H)
 sherpa_create_git_info(foo)

if (HEPMC2_REQUIRED)
  set(SherpaHepMCOutput_SOURCES  Output_HepMC2_Genevent.C Output_HepMC2_Short.C)
  list(TRANSFORM SherpaHepMCOutput_SOURCES PREPEND "${CMAKE_CURRENT_SOURCE_DIR}/../HepMC/")
  list(APPEND SherpaHepMCOutput_SOURCES ${CMAKE_CURRENT_BINARY_DIR}/Git_Info.C)
  add_library(SherpaHepMCOutput SHARED ${SherpaHepMCOutput_SOURCES})
  target_link_libraries(SherpaHepMCOutput PRIVATE ${HEPMC2_LIBRARIES})
  target_include_directories(SherpaHepMCOutput PRIVATE ${HEPMC2_INCLUDE_DIRS})
  sherpa_handle_shared_library(SherpaHepMCOutput SherpaHepMCOutput)
endif()

if (HEPMC3_REQUIRED)
  set(SherpaHepMC3Output_SOURCES  Output_HepMC3_Genevent.C Output_HepMC3_Short.C)
  list(TRANSFORM SherpaHepMC3Output_SOURCES PREPEND "${CMAKE_CURRENT_SOURCE_DIR}/../HepMC/")
  list(APPEND SherpaHepMC3Output_SOURCES ${CMAKE_CURRENT_BINARY_DIR}/Git_Info.C)
  add_library(SherpaHepMC3Output SHARED ${SherpaHepMC3Output_SOURCES})
  target_link_libraries(SherpaHepMC3Output PRIVATE ${HEPMC3_LIB} ${HEPMC3_SEARCH_LIB})
  if (SHERPA_ENABLE_HEPMC3_ROOT)
    target_link_libraries(SherpaHepMC3Output PRIVATE ${HEPMC3_ROOTIO_LIB})
  endif()
  target_include_directories(SherpaHepMC3Output PRIVATE ${HEPMC3_INCLUDE_DIR})
  sherpa_handle_shared_library(SherpaHepMC3Output SherpaHepMC3Output)
endif()