add some gcc hint defines
authorPhilipp Takacs <philipp@bureaucracy.de>
Thu, 21 Sep 2023 10:18:34 +0000 (12:18 +0200)
committerPhilipp Takacs <philipp@bureaucracy.de>
Thu, 21 Sep 2023 10:44:23 +0000 (12:44 +0200)
The defines can help the compiler to produce better warnings
and errors.

This is manual cherrypicked from nmh


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