How to obtain default Qt options that were used in an official distribution?

I've read this thread (How-to Rebuild Qt with "Default" Options?) and still have a question.

One can find options marked with pluses in the output of

Code:

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configure -help

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And the preamble states that

Quote:

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A plus (+) denotes a default value that needs to be evaluated. If the evaluation succeeds, the feature is included.

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How do I "evaluate" these options? E.g., it takes several hours to build the library to just find out that the plus beside -openssl option did not work and therefore QSslCertificate was not defined (in the opposite to the official distribution that provides QSslCertificate with no problem). Maybe, there is a way to obtain the complete set of options?