The attached patch documents the fact that using the -finit-* options will silence -Wuninitialized warnings. I don't think that's unreasonable (and Steve classified it as a "it hurts when I do this" problem), so I intend to close the PR after committing.
Tested with "make info man html pdf". OK to commit to trunk? FX
doc_finit_warnings.diff
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doc_finit_warnings.ChangeLog
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