Solved- Getopt::Long- Trying to specify "prefix" configuration option produces error

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

I was trying to set prefix option for Getopt::Long but that produces the error message as if that option is unknown or I am doing something wrong (what exactly?) ...

use v5.32;
use warnings;

use Getopt::Long;

printf qq[Version: perl %s, Getopt::Long %s\n],
   $^V,
   $Getopt::Long::VERSION;

#use Getopt::Long qw[:config debug prefix - ];
#
# Only difference is time, compile or run, of error ...
#
#   Getopt::Long: unknown or erroneous config parameter "prefix"
#
Getopt::Long::Configure( q[debug], q[prefix], q[-] );

__END__

Version: perl v5.36.3, Getopt::Long 2.52
Getopt::Long: unknown or erroneous config parameter "prefix"
[download]

... So how do I set the prefix string?

Got the same error with long_prefix_pattern configuration option. A search brings up issues with user options; did not see anything relevant to module configuration.

Linked to here on Mastodon.

Comment on Solved- Getopt::Long- Trying to specify "prefix" configuration option produces error Select or Download Code

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Solved- Re: Getopt::Long- Trying to specify "prefix" configuration option produces error by parv (Parson) on Feb 25, 2024 at 02:30 UTC
Just hilarious😂! Well got impatient & could not wait for a clue, so looked in `/usr/local/lib/perl5/5.36/Getopt/Long.pm`, there saw "`prefix=`"(💡) ... `1335 # Getopt::Long Configuration. 1336 sub Configure (@) { ... 1423 elsif ( $try =~ /^prefix=(.+)$/ && $action ) { 1424 $genprefix = $1; 1425 # Turn into regexp. Needs to be parenthesized! 1426 $genprefix = "(" . quotemeta($genprefix) . ")"; ...` [download] ... So I had failed to use `=` as a option-value joiner that the doc says nothing about (all it has about configuration: This subroutine takes a list of quoted strings, each specifying a configuration option to be enabled). Obviously🙄	[reply] [d/l] [select]
Re: Solved- Re: Getopt::Long- Trying to specify "prefix" configuration option produces error by talexb (Chancellor) on Feb 25, 2024 at 12:52 UTC
Well got impatient & .. .. had a look and solved your own problem, proving once again the value of open source software. Got a problem? Documentation unclear? Have a look in the source code. Great job! Alex / talexb / Toronto Thanks PJ. We owe you so much. Groklaw -- RIP -- 2003 to 2013.	[reply]