Warning: Configuration logfiles contain indications of -Wimplicit-function-declaration

Ryan Schmidt ryandesign at macports.org
Thu Jun 10 13:48:30 UTC 2021

On Jun 8, 2021, at 04:27, Michael Newman wrote:

> Today I finally installed Big Sur and followed the MacPorts migration guide. I don't see any errors; no failures to build. However, I did get seven of these warnings:
> Warning: Configuration logfiles contain indications of -Wimplicit-function-declaration; check that features were not accidentally disabled:
> It was found in the following logs:
> lynx2.8.9rel.1/config.log
> clamav-0.103.2/config.log
> anholt-libepoxy-d51a358/config.log
> ghostpdl-9.54.0/config.log
> graphviz-2.40.1/config.log
> gst-libav-1.16.2/config.log
> gst-plugins-bad-1.16.2/config.log
> I have no idea what a "Wimplicit-function-declaration" is. I tried to search around, but was unable to enlighten myself. I gather it has something to do with C; about which I know nothing. If this warning is explained somewhere, please provide me with a link.
> Do I need to do something about these, or are they ignorable?

Each occurrence must be investigated and handled individually. File bug reports.

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