Does libtool need to escape plus signs in egrep expressions?

LRN <[email protected]> Thu, 28 Jun 2018 07:59:38 +0300

Newsgroups	gmane.comp.gnu.libtool.general
Message-ID	<[email protected]>

While looking though ltmain source code i've stumbled upon this egrep invocation:
$EGREP ' (_head_[A-Za-z0-9_]+_[ad]l*|[A-Za-z0-9_]+_[ad]l*_iname)$'
I've tried to see how it behaves on some import libraries that i have, and it
turned out that i could never get it to detect the iname lines, unless i escape
the plus sign.

Are you sure this actually works? Note that the function that does this is only
used in rather exotic corner-cases (old dlltool and/or ms dumpbin being in
use), so it's plausible that it could have been broken since 2010, when it was
added.

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