Request for better syntax checking in lang.opt

[Thomas Koenig]

Hi Martin,

> I was able to write a sanity check for these kind of issues, but it does
> not resolve all similar issues for other keywords. It's not easy to do it.

Having looked at the origina awk code, I agree.  Maybe, in the long
term, a lex/yacc grammar with a monolithic C program to write out
the headers wold be more suitable.

Having said that, I think what you did is already quite valuable
and will save some gcc developers from a few prmature grey hairs :-)

So, I would recommend to commit as is.  Sanity checks do not have
to be perfect.

Thanks for taking this on!

Regards

	Thomas