Re: grep -E ? (Was: Compilation problem solved)

[Paul Eggert]

   Date: Thu, 31 Aug 2000 14:41:48 -0400 (EDT)
   From: Pavel Roskin <[EMAIL PROTECTED]>

   > If Paul said it's
   > ok to assume `+' is not a meta-character in `grep', I believe it.

   You shouldn't believe it. The answer is Plan 9.

OK, but Plan 9 grep is not the same as traditional grep at all.  It
uses a syntax that is almost an extension of POSIX egrep (i.e. it uses
EREs, not BREs).  Unfortunately it's not a pure extension: the bracket
expression syntax is incompatible.

If you want autoconf to work with Plan 9, you'll probably have more
work to do.  For example, Plan 9 does not have "egrep", so you'll have
to remove all uses of egrep (despite what the GNU coding standards
say).  And there are undoubtedly other problems as well.

Can you ask Plan 9 installers to use the Plan 9 ANSI-POSIX Environment
(APE) instead?  http://plan9.bell-labs.com/sys/doc/ape.html claims
that they have a POSIX grep.