Merge pull request commontk#808 from commontk/update-external-depende…

…ncy-module ENH: Update ExternalProjectDependency system based on commontk/Artichoke@0cc99d3
phcerdan · Jun 2, 2018 · cfaf8b7 · cfaf8b7
2 parents cf71b0a + f8b8103
commit cfaf8b7
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/CMake/ctkMacroCheckExternalProjectDependency.cmake b/CMake/ctkMacroCheckExternalProjectDependency.cmake
@@ -458,7 +458,8 @@ function(_sb_get_external_project_arguments proj varname)
     get_property(${proj}_EP_PROPERTY_${property} GLOBAL PROPERTY ${proj}_EP_PROPERTY_${property})
     get_property(${_ALL_PROJECT_IDENTIFIER}_EP_PROPERTY_${property} GLOBAL PROPERTY ${_ALL_PROJECT_IDENTIFIER}_EP_PROPERTY_${property})
     set(_all ${${proj}_EP_PROPERTY_${property}} ${${_ALL_PROJECT_IDENTIFIER}_EP_PROPERTY_${property}})
-    if(_all)
+    list(LENGTH _all _num_properties)
+    if(_num_properties GREATER 0)
       list(APPEND _ep_arguments ${property} ${_all})
     endif()
   endforeach()