CentOS - Mar 2019 - CPAN not working, or is it?

(I've just tried this on a second C7 box, literally clean install, only did
it
on Friday, with the same results)

I'm replacing a dead F19 box with a new C7 one and I'm trying to get my
Perl
install completed.  Ultimately, I need to get Selenium::Remote::Driver 
working, but I'm struggling before that.

I started off as always by using RPM's for everything I possibly can. I then
started to use CPAN for everything else.  It looked like CPAN was working and 
things were installing "OK".

However,  as I went for bigger modules, anything that had dependences were 
then failing as the dependencie were installed OK but then did not appear to 
be available.

The last thing I've just tried is to update CPAN as the RPM is 1.9800 and
the
latest is 2.6.  As you can see below, the install worked, but when it 
reloaded, or when I came out and went back in, it still showed 1.9800

Anyone got any ideas what  I need to do?

cpan[2]> install CPAN
Running install for module 'CPAN'
Running make for A/AN/ANDK/CPAN-2.25.tar.gz
Fetching with LWP:
http://mirror.bytemark.co.uk/CPAN/authors/id/A/AN/ANDK/CPAN-2.25.tar.gz
Fetching with LWP:
http://mirror.bytemark.co.uk/CPAN/authors/id/A/AN/ANDK/CHECKSUMS
Checksum for /root/.cpan/sources/authors/id/A/AN/ANDK/CPAN-2.25.tar.gz ok

  CPAN.pm: Building A/AN/ANDK/CPAN-2.25.tar.gz

Importing PAUSE public key into your GnuPG keychain... done!
(You may wish to trust it locally with 'gpg --lsign-key 450F89EC')
Checking if your kit is complete...
Looks good
Writing Makefile for CPAN
Writing MYMETA.yml and MYMETA.json
cp lib/CPAN.pm blib/lib/CPAN.pm
cp lib/CPAN/CacheMgr.pm blib/lib/CPAN/CacheMgr.pm
cp lib/CPAN/FTP/netrc.pm blib/lib/CPAN/FTP/netrc.pm
cp lib/CPAN/LWP/UserAgent.pm blib/lib/CPAN/LWP/UserAgent.pm
cp lib/CPAN/FTP.pm blib/lib/CPAN/FTP.pm
cp lib/CPAN/Queue.pm blib/lib/CPAN/Queue.pm
cp lib/CPAN/Distroprefs.pm blib/lib/CPAN/Distroprefs.pm
cp lib/CPAN/Kwalify/distroprefs.yml blib/lib/CPAN/Kwalify/distroprefs.yml
cp lib/App/Cpan.pm blib/lib/App/Cpan.pm
cp lib/CPAN/Kwalify.pm blib/lib/CPAN/Kwalify.pm
cp lib/CPAN/Module.pm blib/lib/CPAN/Module.pm
cp lib/CPAN/Author.pm blib/lib/CPAN/Author.pm
cp lib/CPAN/Debug.pm blib/lib/CPAN/Debug.pm
cp lib/CPAN/HTTP/Credentials.pm blib/lib/CPAN/HTTP/Credentials.pm
cp lib/CPAN/API/HOWTO.pod blib/lib/CPAN/API/HOWTO.pod
cp lib/CPAN/Complete.pm blib/lib/CPAN/Complete.pm
cp lib/CPAN/HTTP/Client.pm blib/lib/CPAN/HTTP/Client.pm
cp lib/CPAN/FirstTime.pm blib/lib/CPAN/FirstTime.pm
cp lib/CPAN/Exception/blocked_urllist.pm 
blib/lib/CPAN/Exception/blocked_urllist.pm
cp lib/CPAN/Distrostatus.pm blib/lib/CPAN/Distrostatus.pm
cp lib/CPAN/Admin.pm blib/lib/CPAN/Admin.pm
cp lib/CPAN/Tarzip.pm blib/lib/CPAN/Tarzip.pm
cp lib/CPAN/Prompt.pm blib/lib/CPAN/Prompt.pm
cp lib/CPAN/URL.pm blib/lib/CPAN/URL.pm
cp lib/CPAN/Version.pm blib/lib/CPAN/Version.pm
cp lib/CPAN/DeferredCode.pm blib/lib/CPAN/DeferredCode.pm
cp lib/CPAN/Distribution.pm blib/lib/CPAN/Distribution.pm
cp lib/CPAN/Nox.pm blib/lib/CPAN/Nox.pm
cp lib/CPAN/Exception/RecursiveDependency.pm 
blib/lib/CPAN/Exception/RecursiveDependency.pm
cp lib/CPAN/Bundle.pm blib/lib/CPAN/Bundle.pm
cp lib/CPAN/Plugin/Specfile.pm blib/lib/CPAN/Plugin/Specfile.pm
cp lib/CPAN/Shell.pm blib/lib/CPAN/Shell.pm
cp lib/CPAN/InfoObj.pm blib/lib/CPAN/InfoObj.pm
cp lib/CPAN/HandleConfig.pm blib/lib/CPAN/HandleConfig.pm
cp lib/CPAN/Exception/yaml_process_error.pm 
blib/lib/CPAN/Exception/yaml_process_error.pm
cp lib/CPAN/Plugin.pm blib/lib/CPAN/Plugin.pm
cp lib/CPAN/Exception/yaml_not_installed.pm 
blib/lib/CPAN/Exception/yaml_not_installed.pm
cp lib/CPAN/Index.pm blib/lib/CPAN/Index.pm
cp lib/CPAN/Kwalify/distroprefs.dd blib/lib/CPAN/Kwalify/distroprefs.dd
cp lib/CPAN/Mirrors.pm blib/lib/CPAN/Mirrors.pm
cp scripts/cpan-mirrors blib/script/cpan-mirrors
/usr/bin/perl -MExtUtils::MY -e 'MY->fixin(shift)' --
blib/script/cpan-mirrors
cp scripts/cpan blib/script/cpan
/usr/bin/perl -MExtUtils::MY -e 'MY->fixin(shift)' --
blib/script/cpan
Manifying blib/man1/cpan-mirrors.1
Manifying blib/man1/cpan.1
Manifying blib/man3/CPAN.3pm
Manifying blib/man3/CPAN::Admin.3pm
Manifying blib/man3/CPAN::Tarzip.3pm
Manifying blib/man3/CPAN::Queue.3pm
Manifying blib/man3/CPAN::Distroprefs.3pm
Manifying blib/man3/CPAN::Version.3pm
Manifying blib/man3/App::Cpan.3pm
Manifying blib/man3/CPAN::Kwalify.3pm
Manifying blib/man3/CPAN::Nox.3pm
Manifying blib/man3/CPAN::Plugin::Specfile.3pm
Manifying blib/man3/CPAN::Debug.3pm
Manifying blib/man3/CPAN::HandleConfig.3pm
Manifying blib/man3/CPAN::Plugin.3pm
Manifying blib/man3/CPAN::API::HOWTO.3pm
Manifying blib/man3/CPAN::Mirrors.3pm
Manifying blib/man3/CPAN::FirstTime.3pm
  ANDK/CPAN-2.25.tar.gz
  /usr/bin/make -- OK
Running make test
PERL_DL_NONLAZY=1 /usr/bin/perl "-MExtUtils::Command::MM"
"-e" "test_harness(0, 'blib/lib',
'blib/arch')"
t/*.t
t/00signature.t ............... skipped: No Module::Signature found [INC 
= /root/.cpan/build/CPAN-2.25-YZAzWH/blib/lib
/root/.cpan/build/CPAN-2.25-YZAzWH/blib/arch /usr/local/lib64/perl5
/usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl
/usr/lib64/perl5 /usr/share/perl5 .]
t/01loadme.t .................. ok   
t/02nox.t ..................... ok   
t/03pkgs.t .................... ok     
t/04clean_load.t .............. ok     
t/10version.t ................. ok     
t/11mirroredby.t .............. ok   
t/12cpan.t .................... ok     
t/13tarzip.t .................. ok   
t/14forkbomb.t ................ skipped: test only run when called with --doit
t/30shell.t ................... skipped: no Expect, maybe try env 
CPAN_RUN_SHELL_TEST_WITHOUT_EXPECT=1
t/31sessions.t ................ skipped: Module::Build not installed
t/41distribution.t ............ 1/20 No or no sufficiently recent 
CPAN::Perl::Releases installed at t/41distribution.t line 60.
t/41distribution.t ............ ok     
t/42distroprefs.t ............. ok   
t/43distroprefspref.t ......... ok     
t/44cpanmeta.t ................ ok     
t/50pod.t ..................... skipped: Test::Pod 1.00 required for testing 
POD
t/51pod.t ..................... ok     
t/52podcover.t ................ skipped: Test::Pod::Coverage 0.18 required for 
testing pod coverage
t/60credentials.t ............. ok   
t/70_critic.t ................. skipped: Test::Perl::Critic only run when 
AUTHOR_TEST set
t/71_minimumversion.t ......... skipped: running MinimumVersion test only run 
when AUTHOR_TEST set
t/97-compile.t ................ ok   
t/97-cpanpm_output_hook.t ..... ok     
t/97-expand_filenames.t ....... ok    
t/97-install_hack.t ........... ok   
t/97-mock.t ................... ok   
t/97-process_options.t ........ ok   
t/97-process_setup_options.t .. ok   
t/97-return_values.t .......... ok     
t/97-run.t .................... # will run '/usr/bin/perl -Mblib 
blib/script/cpan -y 2>&1'
t/97-run.t .................... 1/32 # will run '/usr/bin/perl -Mblib 
blib/script/cpan -h 2>&1'
t/97-run.t .................... ok     
All tests successful.
Files=31, Tests=494,  9 wallclock secs ( 0.10 usr  0.03 sys +  7.47 cusr  1.02 
csys =  8.62 CPU)
Result: PASS
  ANDK/CPAN-2.25.tar.gz
  /usr/bin/make test -- OK
Running make install
Manifying blib/man1/cpan-mirrors.1
Manifying blib/man1/cpan.1
Installing /root/perl5/lib/perl5/CPAN.pm
Installing /root/perl5/lib/perl5/CPAN/CacheMgr.pm
Installing /root/perl5/lib/perl5/CPAN/FTP.pm
Installing /root/perl5/lib/perl5/CPAN/Queue.pm
Installing /root/perl5/lib/perl5/CPAN/Distroprefs.pm
Installing /root/perl5/lib/perl5/CPAN/Kwalify.pm
Installing /root/perl5/lib/perl5/CPAN/Module.pm
Installing /root/perl5/lib/perl5/CPAN/Author.pm
Installing /root/perl5/lib/perl5/CPAN/Debug.pm
Installing /root/perl5/lib/perl5/CPAN/Complete.pm
Installing /root/perl5/lib/perl5/CPAN/FirstTime.pm
Installing /root/perl5/lib/perl5/CPAN/Distrostatus.pm
Installing /root/perl5/lib/perl5/CPAN/Admin.pm
Installing /root/perl5/lib/perl5/CPAN/Tarzip.pm
Installing /root/perl5/lib/perl5/CPAN/Prompt.pm
Installing /root/perl5/lib/perl5/CPAN/URL.pm
Installing /root/perl5/lib/perl5/CPAN/Version.pm
Installing /root/perl5/lib/perl5/CPAN/DeferredCode.pm
Installing /root/perl5/lib/perl5/CPAN/Distribution.pm
Installing /root/perl5/lib/perl5/CPAN/Nox.pm
Installing /root/perl5/lib/perl5/CPAN/Bundle.pm
Installing /root/perl5/lib/perl5/CPAN/Shell.pm
Installing /root/perl5/lib/perl5/CPAN/InfoObj.pm
Installing /root/perl5/lib/perl5/CPAN/HandleConfig.pm
Installing /root/perl5/lib/perl5/CPAN/Plugin.pm
Installing /root/perl5/lib/perl5/CPAN/Index.pm
Installing /root/perl5/lib/perl5/CPAN/Mirrors.pm
Installing /root/perl5/lib/perl5/CPAN/FTP/netrc.pm
Installing /root/perl5/lib/perl5/CPAN/LWP/UserAgent.pm
Installing /root/perl5/lib/perl5/CPAN/Kwalify/distroprefs.yml
Installing /root/perl5/lib/perl5/CPAN/Kwalify/distroprefs.dd
Installing /root/perl5/lib/perl5/CPAN/HTTP/Credentials.pm
Installing /root/perl5/lib/perl5/CPAN/HTTP/Client.pm
Installing /root/perl5/lib/perl5/CPAN/API/HOWTO.pod
Installing /root/perl5/lib/perl5/CPAN/Exception/blocked_urllist.pm
Installing /root/perl5/lib/perl5/CPAN/Exception/RecursiveDependency.pm
Installing /root/perl5/lib/perl5/CPAN/Exception/yaml_process_error.pm
Installing /root/perl5/lib/perl5/CPAN/Exception/yaml_not_installed.pm
Installing /root/perl5/lib/perl5/CPAN/Plugin/Specfile.pm
Installing /root/perl5/lib/perl5/App/Cpan.pm
Installing /root/perl5/man/man1/cpan-mirrors.1
Installing /root/perl5/man/man1/cpan.1
Installing /root/perl5/man/man3/CPAN.3pm
Installing /root/perl5/man/man3/CPAN::Admin.3pm
Installing /root/perl5/man/man3/CPAN::Tarzip.3pm
Installing /root/perl5/man/man3/CPAN::Queue.3pm
Installing /root/perl5/man/man3/CPAN::Distroprefs.3pm
Installing /root/perl5/man/man3/CPAN::Version.3pm
Installing /root/perl5/man/man3/App::Cpan.3pm
Installing /root/perl5/man/man3/CPAN::Kwalify.3pm
Installing /root/perl5/man/man3/CPAN::Nox.3pm
Installing /root/perl5/man/man3/CPAN::Plugin::Specfile.3pm
Installing /root/perl5/man/man3/CPAN::Debug.3pm
Installing /root/perl5/man/man3/CPAN::HandleConfig.3pm
Installing /root/perl5/man/man3/CPAN::Plugin.3pm
Installing /root/perl5/man/man3/CPAN::API::HOWTO.3pm
Installing /root/perl5/man/man3/CPAN::Mirrors.3pm
Installing /root/perl5/man/man3/CPAN::FirstTime.3pm
Installing /root/perl5/bin/cpan-mirrors
Installing /root/perl5/bin/cpan
Appending installation info 
to /root/perl5/lib/perl5/x86_64-linux-thread-multi/perllocal.pod
  ANDK/CPAN-2.25.tar.gz
  /usr/bin/make install  -- OK

cpan[3]> reload cpan
(CPAN__unchanged__v1.9800)(CPAN::Author__unchanged__v5.5001)
(CPAN::CacheMgr__unchanged__v5.5001)(CPAN::Complete__unchanged__v5.5)
(CPAN::Debug__unchanged__v5.5001)(CPAN::DeferredCode__unchanged__v5.50)
(CPAN::Distribution__unchanged__v1.9602)(CPAN::Distroprefs__unchanged__v6)
(CPAN::Distrostatus__unchanged__v5.5)
(CPAN::Exception::RecursiveDependency..v5.5)
(CPAN::Exception::yaml_not_installed..v5.5)(CPAN::FTP__unchanged__v5.5005)
(CPAN::FTP::netrc__unchanged__v1.01)(CPAN::HandleConfig__unchanged__v5.5003)
(CPAN::Index__unchanged__v1.9600)(CPAN::InfoObj__unchanged__v5.5)
(CPAN::LWP::UserAgent....v1.9600)(CPAN::Module__unchanged__v5.5001)
(CPAN::Prompt__unchanged__v5.5)(CPAN::Queue__unchanged__v5.5001)
(CPAN::Shell__unchanged__v5.5002)(CPAN::Tarzip__unchanged__v5.5011)
(CPAN::Version__unchanged__v5.5001)
8 subroutines redefined

cpan[4]> Lockfile removed.
[root at lou ~]# cpan

cpan shell -- CPAN exploration and modules installation (v1.9800)
Enter 'h' for help.

cpan[1]>

> However,  as I went for bigger modules, anything that had dependences were 
> then failing as the dependencie were installed OK but then did not appear
to
> be available.
CPAN on CentOS 7 doesn't install things in the system locations by
default (and by design).  This is to stop CPAN from over-writing files
that actually belong to rpm packages.

A number of things you can do.  The sort of recommended way is to
package the perl modules into an RPM and install them that way (so that
the package managers know about them and can resolve conflicts).  There
are progs to do it for - look for cpanspec.

CPAN will install the modules in ~/perl5/... by default - the "real"
way of doing things is to @INC that location at the top of the perl
script or set environment variables appropriately.

Finally, if you must, fiddle with the CPAN configuration to install
them in a system location.  But be aware that things might get confused
or break.

P.

On Monday 11 March 2019 14:28:38 Pete Biggs wrote:
> > However,  as I went for bigger modules, anything that had dependences
> > were then failing as the dependencie were installed OK but then did
not
> > appear to be available.
> A number of things you can do.  The sort of recommended way is to
> package the perl modules into an RPM and install them that way (so that
> the package managers know about them and can resolve conflicts).  There
> are progs to do it for - look for cpanspec.
I have found the following page to install using cpanspec, and all went well 
until I actually want to build the RPM's. Doesn't matter what I try to
build
I get the same problems with the man pages being missing, and nothing gets 
built.

[root at lou cpanspec]# rpmbuild -ba perl-strictures.spec
Executing(%prep): /bin/sh -e /var/tmp/rpm-tmp.H8RqZz
+ umask 022
+ cd /root/rpmbuild/BUILD
+ cd /root/rpmbuild/BUILD
+ rm -rf strictures-2.000006
+ /usr/bin/gzip -dc /root/rpmbuild/SOURCES/strictures-2.000006.tar.gz
+ /usr/bin/tar -xf -
+ STATUS=0
+ '[' 0 -ne 0 ']'
+ cd strictures-2.000006
+ /usr/bin/chmod -Rf a+rX,u+w,g-w,o-w .
+ exit 0
Executing(%build): /bin/sh -e /var/tmp/rpm-tmp.WPzjcW
+ umask 022
+ cd /root/rpmbuild/BUILD
+ cd strictures-2.000006
+ /usr/bin/perl Makefile.PL INSTALLDIRS=vendor
Checking if your kit is complete...
Looks good
Warning: prerequisite bareword::filehandles 0 not found.
Warning: prerequisite indirect 0 not found.
Warning: prerequisite multidimensional 0 not found.
Writing Makefile for strictures
Writing MYMETA.yml and MYMETA.json
+ make -j2
cp lib/strictures/extra.pm blib/lib/strictures/extra.pm
cp lib/strictures.pm blib/lib/strictures.pm
Manifying blib/man3/strictures::extra.3pm
Manifying blib/man3/strictures.3pm
+ exit 0
Executing(%install): /bin/sh -e /var/tmp/rpm-tmp.pxcIGj
+ umask 022
+ cd /root/rpmbuild/BUILD
+ '[' /root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64
'!=' / ']'
+ rm -rf /root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64
++ dirname /root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64
+ mkdir -p /root/rpmbuild/BUILDROOT
+ mkdir /root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64
+ cd strictures-2.000006
+ rm -rf /root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64
+ make pure_install 
PERL_INSTALL_ROOT=/root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64
Manifying blib/man3/strictures::extra.3pm
Manifying blib/man3/strictures.3pm
Installing
/root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64/root/perl5/lib/perl5/strictures.pm
Installing
/root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64/root/perl5/lib/perl5/strictures/extra.pm
Installing
/root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64/root/perl5/man/man3/strictures::extra.3pm
Installing
/root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64/root/perl5/man/man3/strictures.3pm
+ find /root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64 -type 
f -name .packlist -exec rm -f '{}' ';'
+ 
find /root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64 -depth -type
d -exec rmdir '{}' ';'
+ /usr/bin/chmod -Rf 
a+rX,u+w,g-w,o-w
/root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64/root
+ /usr/lib/rpm/find-debuginfo.sh --strict-build-id -m --run-dwz
--dwz-low-mem-die-limit
10000000 --dwz-max-die-limit 
110000000 /root/rpmbuild/BUILD/strictures-2.000006
/usr/lib/rpm/sepdebugcrcfix: Updated 0 CRC32s, 0 CRC32s did match.
+ /usr/lib/rpm/check-buildroot
+ /usr/lib/rpm/redhat/brp-compress
+ /usr/lib/rpm/redhat/brp-strip-static-archive /usr/bin/strip
+ /usr/lib/rpm/brp-python-bytecompile /usr/bin/python 1
+ /usr/lib/rpm/redhat/brp-python-hardlink
+ /usr/lib/rpm/redhat/brp-java-repack-jars
Executing(%check): /bin/sh -e /var/tmp/rpm-tmp.RIav4H
+ umask 022
+ cd /root/rpmbuild/BUILD
+ cd strictures-2.000006
+ make test
PERL_DL_NONLAZY=1 /usr/bin/perl "-MExtUtils::Command::MM"
"-e" "test_harness(0, 'blib/lib',
'blib/arch')"
t/*.t
t/crash.t ....... ok   
t/extras.t ...... ok    
t/strictures.t .. ok   
All tests successful.
Files=3, Tests=42,  0 wallclock secs ( 0.02 usr  0.01 sys +  0.06 cusr  0.01 
csys =  0.10 CPU)
Result: PASS
+ exit 0
Processing files: perl-strictures-2.000006-1.el7.noarch
error: File not found by 
glob:
/root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64/usr/share/perl5/vendor_perl/*
error: File not found by 
glob:
/root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64/usr/share/man/man3/*
Executing(%doc): /bin/sh -e /var/tmp/rpm-tmp.QDACU6
+ umask 022
+ cd /root/rpmbuild/BUILD
+ cd strictures-2.000006
+ 
DOCDIR=/root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64/usr/share/doc/perl-strictures-2.000006
+ export DOCDIR
+ /usr/bin/mkdir -p
/root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64/usr/share/doc/perl-strictures-2.000006
+ cp -pr 
Changes
/root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64/usr/share/doc/perl-strictures-2.000006
+ cp -pr 
LICENSE
/root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64/usr/share/doc/perl-strictures-2.000006
+ cp -pr 
META.json
/root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64/usr/share/doc/perl-strictures-2.000006
+ cp -pr 
README
/root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64/usr/share/doc/perl-strictures-2.000006
+ exit 0


RPM build errors:
    File not found by 
glob:
/root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64/usr/share/perl5/vendor_perl/*
    File not found by 
glob:
/root/rpmbuild/BUILDROOT/perl-strictures-2.000006-1.el7.x86_64/usr/share/man/man3/*
[root at lou cpanspec]#

On Mar 11, 2019, at 8:01 AM, Gary Stainburn <gary.stainburn at
ringways.co.uk> wrote:
> 
> Anyone got any ideas what  I need to do?
First, use cpanm instead of the old cpan shell:

    $ sudo yum install perl-App-cpanminus

It has a number of advantages:

1. It?s much smarter about chasing dependencies, which is your core problem
here.

2. It autoconfigures, not requiring all that outdated stuff about ?where is your
FTP program,? ?what mirror should I use,? and such.

3. It?s easy to feed it a cpanfile with a curated set of dependencies for a
one-command ?install everything I need here? upgrade:

    https://metacpan.org/pod/distribution/Module-CPANfile/lib/cpanfile.pod

4. When it fails, it keeps its output in a log file that?s easy to send to
mailing lists when asking for help.  Hint. :)
> I started off as always by using RPM's for everything I possibly can.
I try to do that, too.  The claim in another reply that RPM CPAN modules and
cpan- or cpanm-installed modules cannot work together is incorrect.

What is correct is that the CentOS-provided RPMs are often sufficiently outdated
that they no longer work with the latest releases that cpanm wants to download
by default.  The older the CentOS installation, the greater the chance of this
happening, and the greater the chance that it will happen to a module that?s so
deeply tied into your dependency tree that it seems to break everything.

There are three main solutions:

1. Tell cpanm to download an older version that works with the other
RPM-installed CPAN modules:

    $ sudo cpanm Foo::Bar at 1.2.3

1b: Same thing, but in cpanfile syntax:

    requires 'Foo::Bar', ?== 1.2.3';

cpanfile is very flexible and can be given much more granular rules; see the
link above.

2. Selectively remove CPAN modules installed via RPM that conflict and let cpanm
upgrade you to the latest.  This works as long as the newer modules are upwards
compatible with the remaining RPM-installed CPAN modules.

3. Use a system like App::Fatpacker or Carton to bundle your app and its
dependencies into a self-contained bundle that doesn?t depend on system CPAN
modules:

    https://metacpan.org/release/Carton
    https://metacpan.org/pod/App::FatPacker

I prefer using Carton with cpanfile, but others prefer the way App::Fatpacker
works.

On 3/11/19 1:57 PM, Warren Young wrote:
*snip*
> 
> What is correct is that the CentOS-provided RPMs are often sufficiently
outdated that they no longer work with the latest releases that cpanm wants to
download by default.
Often I end up downloading a src.rpm from Fedora for perl modules and 
building that.

It means security patches are now my responsibility for it, and 
sometimes it has other perm module dependencies that I have to do the 
same thing with first, but it usually it works without too much fuss.

> > I started off as always by using RPM's for everything I possibly
can.
> 
> I try to do that, too.  The claim in another reply that RPM CPAN
> modules and cpan- or cpanm-installed modules cannot work together is
> incorrect.
Since I'm the only other person to reply, I presume you mean something
I said, but I don't think I ever said they "cannot work together"
- in
fact I said that personally, I use both RPM and CPAN and install into
system locations.

All I was trying to do was to explain to Gary *why* his CPAN installs
weren't working as expected, and that it is because of the possibility
of CPAN over-writing RPM installed modules (and the confusion that may
result), and that this was deemed to be a bad thing so the default
install location was changed. 

P.