Maintenance: check for Perl modules

[yadij]

... used by logic in ./scripts/ directory which
may be run during build, testing or release

[yadij]

diff of ./configure output

--- master.out	2026-01-10 17:55:36.716000309 +1300
+++ pr.out	2026-01-10 17:51:02.563210374 +1300
@@ -65,6 +65,17 @@
 checking pkg-config is at least version 0.9.0... yes
 checking for perl... /usr/bin/perl
 checking for pod2man... /usr/bin/pod2man
+checking for perl module strict... ok
+checking for perl module warnings... ok
+checking for perl module Carp... ok
+checking for perl module Fcntl... ok
+checking for perl module File::Basename... ok
+checking for perl module Getopt::Long... ok
+checking for perl module Getopt::Std... ok
+checking for perl module IO::File... ok
+checking for perl module IPC::Open2... ok
+checking for perl module Pod::Usage... ok
+checking for perl module Squid::ParseLog... no
 checking for ar... /usr/bin/ar
 checking for linuxdoc... /usr/bin/linuxdoc
 configure: strict error checking enabled: yes

[rousskov]

The proposed checks seem to be unused by any Squid code. Please adjust this PR description to clarify why they should be added.

[yadij]

The proposed checks seem to be unused by any Squid code. Please adjust this PR description to clarify why they should be added.

That is already detailed in the PR description. The code in ./scripts/ uses these modules.

NB: Some of those scripts are test tools which should be in test-suite/ and updated for regular use by our CI. Others are for admin use - those should be in tools/ and installed after some logic/UI cleanup.
For consistency I have included the dependencies of everything under ./scripts. This list can be updated as/when the content in that directory changes.

[kinkie]

Can you use AC_CACHE_CHECK here?

[yadij]

Tricky to do inside a for loop.

Since this is third-party code import I will try to do as a followup if you want to insist on it.

Was not meaning to approve, there's a comment