Dave Korn <dave.korn.cyg...@googlemail.com> writes:

>   I think you'll probably have to use plain old iswalpha.  Looking at opts.c,
> I'm guessing you're trying to extend the help string format to allow unicode?

Note that it may be OK to use iswalpha strictly on command line
options, but using it anywhere else gets you into a set of issues
around -finput-charset and -fexec-charset.

Ian

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