I guess I don't follow the purpose of involving glibc now. Because whatever changes they might or might not agree to make, they obviously won't reach user systems for years. So for anyone to make use of the new options, it all has to be implemented in gnulib regex anyway. If the goal is to minimize the changes (certainly desirable, of course), could make proposals to glibc afterwards?
I have the impression that we all agree that the best change, in theory, would be to support equivalence classes along with rational range interpretation (RRI :). However, I suspect that isn't implementable in a reasonable time frame for gawk4. That's ok; Arnold can always use the code he's got now. Beyond that, is it reasonably implementable at all in gnulib? Sorry if I'm being dumb here ... k
