use 5.005 with perl v5.16.3

sijaanh has asked for the wisdom of the Perl Monks concerning the following question:

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Re: use 5.005 with perl v5.16.3 by hippo (Bishop) on Aug 04, 2021 at 08:30 UTC
Welcome to the monastery, sijaanh. As you have provided no code the advice will have to be somewhat general in nature. Try to compile each of `/perl/perl_for_sij/JSON/backportPP.pm`, `/tools/siji_general.pm` and `/tmp/mv.pl` in isolation in that order. The first one that fails is where the problem really lies. Then apply the Basic debugging checklist to the file which failed. If you cannot resolve it that way, you could present an SSCCE - noting that the first S stands for "short". Nobody is going to want to wade through 1000 lines of siji_general.pm as it stands. Good luck. 🦛	[reply] [d/l] [select]
Re^2: use 5.005 with perl v5.16.3 by sijaanh (Initiate) on Aug 08, 2021 at 08:37 UTC
Okay I found when it happens" In /siji_general.pm this give the compilation error above: `use lib "//perl/perl_for_siji"; use JSON;` [download] But this does not: `use JSON; use lib "//perl/perl_for_siji";` [download] What might be the issue and how can I solve it without changing the code at all. Thanks	[reply] [d/l] [select]
Re^3: use 5.005 with perl v5.16.3 by haukex (Archbishop) on Aug 08, 2021 at 08:49 UTC
That means you've got two (probably different) versions of JSON in `/perl/perl_for_siji` and in the standard library locations (@INC), and the one in `/perl/perl_for_siji` appears to be broken somehow. There are different ways to try and debug and fix this, however, it's unclear to me why you even need libraries from `/perl/perl_for_siji`, so you'd need to explain your installation more for us to be able to give good advice.	[reply] [d/l] [select]
Re^4: use 5.005 with perl v5.16.3 by sijaanh (Initiate) on Aug 08, 2021 at 09:25 UTC
Re^5: use 5.005 with perl v5.16.3 by hippo (Bishop) on Aug 08, 2021 at 09:28 UTC
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Re: use 5.005 with perl v5.16.3 by kcott (Archbishop) on Aug 04, 2021 at 21:19 UTC
G'day sijaanh, Welcome to the Monastry. [Please note: Writing sloppy, "couldn't care less" posts, like you have above, will simply be ignored by many, and possibly downvoted. You would've been presented with a "Preview" screen and yet you chose to post what we see above. See "How do I post a question effectively?" for a better way to handle this.] I get the impression from your post that you don't fully understand either "use VERSION" or "require VERSION". I don't have the vintage versions of Perl that you've mention; however, the following should provide useful examples (note that `perle` provides lots of feedback if problems are encountered). $ alias perle alias perle='perl -Mstrict -Mwarnings -Mautodie=:all -MCarp::Always -E +' $ perlbrew list * perl-5.34.0 perl-5.33.5 perl-5.32.0 perl-5.30.0 $ perle 'use 5.034; no warnings "experimental::try"; use feature "try" +; try { 1 == 2 } catch($e) { }' $ perlbrew switch perl-5.32.0 $ perle 'use 5.034; no warnings "experimental::try"; use feature "try" +; try { 1 == 2 } catch($e) { }' Perl v5.34.0 required--this is only v5.32.0, stopped at -e line 1. main::BEGIN() called at -e line 1 eval {...} called at -e line 1 BEGIN failed--compilation aborted at -e line 1. [download] Ask further (and better) questions if you need more help with any of this. — Ken	[reply] [d/l] [select]
Re: use 5.005 with perl v5.16.3 by Anonymous Monk on Aug 05, 2021 at 09:41 UTC
What happens if you run this program `use JSON;` [download]	[reply] [d/l]
Re^2: use 5.005 with perl v5.16.3 by AnomalousMonk (Archbishop) on Aug 05, 2021 at 18:39 UTC
`use JSON;` is a statement, not a program. What happens if you provide a program to run? `Win8 Strawberry 5.8.9.5 (32) Thu 08/05/2021 14:31:49 C:\@Work\Perl\monks >perl -MJSON -e print(1) 1 Win8 Strawberry 5.8.9.5 (32) Thu 08/05/2021 14:33:13 C:\@Work\Perl\monks >perl -e "use JSON; print(1)" 1 Win8 Strawberry 5.8.9.5 (32) Thu 08/05/2021 14:33:41 C:\@Work\Perl\monks >perl -e "use strict; use warnings; use JSON; print(1)" 1` [download] Give a man a fish: `<%-{-{-{-<`	[reply] [d/l] [select]
Re^3: use 5.005 with perl v5.16.3 by Anonymous Monk on Aug 05, 2021 at 19:28 UTC
I suppose it's a matter of semantics ("what constitutes a program?") but I disagree with you. A program consisting of just `use JSON;` executes a whole bunch of code, any of which could fail for various reasons. That's why the other AM asked.	[reply] [d/l]
Re^4: use 5.005 with perl v5.16.3 by AnomalousMonk (Archbishop) on Aug 05, 2021 at 19:58 UTC
Re^5: use 5.005 with perl v5.16.3 by Anonymous Monk on Aug 06, 2021 at 02:13 UTC
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