Use the Key4hepConfig flag to set the standard, compiler flags and

rpath magic.

CMakeLists.txt

@@ -29,6 +29,8 @@ find_package(Gaudi REQUIRED)
   endif()
 find_package(EDM4HEP REQUIRED)
 
+include(cmake/Key4hepConfig.cmake)
+
 include(GNUInstallDirs)
 include(CTest)
 
@@ -37,44 +39,6 @@ if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
     "Install path prefix, prepended onto install directories." FORCE )
 endif()
 
-# Set up C++ Standard
-# ``-DCMAKE_CXX_STANDARD=<standard>`` when invoking CMake
-set(CMAKE_CXX_STANDARD 20 CACHE STRING "")
-
-if(NOT CMAKE_CXX_STANDARD MATCHES "20")
-  message(FATAL_ERROR "Unsupported C++ standard: ${CMAKE_CXX_STANDARD}")
-endif()
-
-#---RPATH options-------------------------------------------------------------------------------
-option(K4FWCORE_SET_RPATH         "Link libraries with built-in RPATH (run-time search path)" ON)
-
-#  When building, don't use the install RPATH already (but later on when installing)
-set(CMAKE_SKIP_BUILD_RPATH FALSE)           # don't skip the full RPATH for the build tree
-set(CMAKE_BUILD_WITH_INSTALL_RPATH FALSE)   # use always the build RPATH for the build tree
-set(CMAKE_MACOSX_RPATH TRUE)                # use RPATH for MacOSX
-set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE) # point to directories outside the build tree to the install RPATH
-
-# Check whether to add RPATH to the installation (the build tree always has the RPATH enabled)
-if(APPLE)
-  set(CMAKE_INSTALL_NAME_DIR "@rpath")
-  set(CMAKE_INSTALL_RPATH "@loader_path/../lib")    # self relative LIBDIR
-  # the RPATH to be used when installing, but only if it's not a system directory
-  list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/lib" isSystemDir)
-  if("${isSystemDir}" STREQUAL "-1")
-    set(CMAKE_INSTALL_RPATH "@loader_path/../lib")
-  endif("${isSystemDir}" STREQUAL "-1")
-elseif(K4FWCORE_SET_RPATH)
-  set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib") # install LIBDIR
-  # the RPATH to be used when installing, but only if it's not a system directory
-  list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/lib" isSystemDir)
-  if("${isSystemDir}" STREQUAL "-1")
-    set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
-  endif("${isSystemDir}" STREQUAL "-1")
-else()
-  set(CMAKE_SKIP_INSTALL_RPATH TRUE)           # skip the full RPATH for the install tree
-endif()
-
-
 add_subdirectory(k4FWCore)
 add_subdirectory(k4Interface)
 add_subdirectory(python)
@@ -89,8 +53,6 @@ if(ENABLE_CPACK)
 endif()
 
 
-
-
 install(EXPORT ${PROJECT_NAME}Targets
   NAMESPACE ${PROJECT_NAME}::
   FILE "${PROJECT_NAME}Targets.cmake"