[sr #110657] Autoconf configure script considers absence of usable grep a fatal error, although it only uses egrep thereafter

[Alain Knaff]

Follow-up Comment #10, sr #110657 (project autoconf):

[comment #9 comment #9:]
> [comment #8 comment #8:]
[...]
> > egrep '(-z)' </etc/profile
> 
> That won't work if the pattern contains back-references, since it'll mess up
the numbering.

Indeed, forgot about that.

> However, we can prepend '.?' to the pattern; this should work. How about the
attached patch instead?
> 
> (file #53284)

This patch works great, thanks :-)



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