set CMAKE_SHARED_LINKER_FLAGS

cmake/Modules/ClhepVariables.cmake

@@ -40,6 +40,8 @@ macro( clhep_check_variable_names )
   message( STATUS "clhep_check_variable_names: CMAKE_CXX_FLAGS_RELWITHDEBINFO is ${CMAKE_CXX_FLAGS_RELWITHDEBINFO}" )
   message( STATUS "clhep_check_variable_names: CMAKE_CXX_STANDARD_LIBRARIES is ${CMAKE_CXX_STANDARD_LIBRARIES}" )
   message( STATUS "clhep_check_variable_names: CMAKE_CXX_LINK_FLAGS is ${CMAKE_CXX_LINK_FLAGS}" )
+  message( STATUS "clhep_check_variable_names: CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS is ${CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS}" )
+  message( STATUS "clhep_check_variable_names: CMAKE_SHARED_LINKER_FLAGS is ${CMAKE_SHARED_LINKER_FLAGS}" )
 endmacro( clhep_check_variable_names )
 
 macro( clhep_autoconf_variables )
@@ -237,6 +239,12 @@ macro( clhep_set_compiler_flags )
       set(CMAKE_CXX_FLAGS "/EHsc /nologo /GR /MD /D USING_VISUAL")
     endif()
   endif()
+  # linker flags
+    if (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+      set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-undefined,error")
+    else()
+      set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--no-undefined")
+    endif()
   clhep_autoconf_variables()
   message( STATUS "compiling with ${clhep_cxx_compiler} ${CMAKE_CXX_FLAGS} ${CXXFLAGS}")
 endmacro( clhep_set_compiler_flags )