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> In particular if you update a library and they deprecate some functions, -Wdeprecated will start emitting some warnings, which are now errors. Do you think you can fix that in a day? It could take months to fix something that's literally not a problem yet.

It doesn't take months to add -Wno-deprecated to a Makefile.

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> It doesn't take months to add -Wno-deprecated to a Makefile.

After which you no longer have any visibility on what deprecated fxns you're calling, which means one day updating that library again is going to completely block you until you rework your interface.

-Wno-error=deprecated would probably be better.

Even better in my experience: A work item to be triaged, generated when you add either.

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