I can't find a good definition anywhere...

[Doug Gwyn]

In article <13022 at haddock.ima.isc.com> karl at haddock.ima.isc.com (Karl Heuer) writes:
>>What does a #pragma _do_, anyway?
>So the guy says, "Anything it wants!"

There is some sentiment that whatever #pragma does, the rest of the
specifications in the Standard still have to be conformed to, so it's
not quite "anything".  Valid examples are output listing control,
levels of optimization, etc.