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There is more than one C specification, and with each new release of GCC several things that used to emit warnings are newly treated as errors.


but if the correct standard is specified as an option, shouldn't that prevent conformant applications from failing to compile in newer versions?


Sure, that's one approach. Testing those changes takes time when you're working on a whole operating system and a ports tree. More time than cutting a new gcc release, as it turns out.


> shouldn't that prevent

it should. It doesn't.




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