There were several problems related to resolving related non-member (RNM) functions for classes. This commit does the following changes: - Overload numbers for RNMs are now calculated at the time the \relates command is processed, instead of a separate step. - If a \relates refers to an entity outside the module boundary, write the argument passed to it as-is into the index file. - Delay the destruction of QDocIndexFiles singleton, to resolve the RNMs read from the index files prior to generating docs. - Remove the redundant call to normalizeOverloads() for single- exec mode as unnecessary. These changes ensure that all RNMs are listed in the documentation for the node that they belong to. A remaining issue is that if a function relates to a class outside the module boundary, that function documentation will be empty because the doc content is not stored into the index file (for obvious reasons). Single-exec mode does not have this problem. Change-Id: I33f038120728932cd9fd70da28d9090023068bd6 Task-number: QTBUG-47589 Reviewed-by: Topi Reiniö <topi.reinio@digia.com>