I'm pretty sure printf warnings were there in djgpp for DOS, which would put it to at least 1996. It must have taken actual effort to ignore this feature for so

I'm pretty sure printf warnings were there in djgpp for DOS, which would put it to at least 1996. It must have taken actual effort to ignore this feature for so long :) On the other hand, gcc's equivalent of pragma optimize is a comparatively recent addition! - and I know which one has caused me more heartache over the years (hint: not format strings).