pkg/55581: pkgtools/pkg_chk throws warning with new(er) gawk

[joern.clausen%uni-bielefeld.de@localhost]

>Number:         55581
>Category:       pkg
>Synopsis:       pkgtools/pkg_chk throws warning with new(er) gawk
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Aug 17 15:10:00 +0000 2020
>Originator:     Joern Clausen
>Release:        
>Organization:
Bielefeld University
>Environment:
>Description:
On Solaris 11.4, pkg_chk throws a warning:

$ pkg_chk -aun
gawk: cmd. line:43: warning: regexp escape sequence `\=' is not a known regexp operator

Otherwise, it seems to work fine, but it is unclear when and how the failing regex might have consequences.

gawk on Solaris 11.4 is fairly recent, the same version is available via pkgsrc:

$ /usr/bin/gawk --version
GNU Awk 5.0.1, API: 2.0 (GNU MPFR 3.1.5, GNU MP 6.1.2)
Copyright (C) 1989, 1991-2019 Free Software Foundation.

>How-To-Repeat:

>Fix: