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Top Forums UNIX for Beginners Questions & Answers Cannot subset ranges from another range set Post 303042707 by RudiC on Friday 3rd of January 2020 04:59:01 PM
Old 01-03-2020
You are right, that "feature" should not be taken for granted, but both my linux and FreeBSD versions have it. Still your caveat can / should be kept in mind.
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PERLFREEBSD(1)						 Perl Programmers Reference Guide					    PERLFREEBSD(1)

NAME
README.freebsd - Perl version 5 on FreeBSD systems DESCRIPTION
This document describes various features of FreeBSD that will affect how Perl version 5 (hereafter just Perl) is compiled and/or runs. FreeBSD core dumps from readdir_r with ithreads When perl is configured to use ithreads, it will use re-entrant library calls in preference to non-re-entrant versions. There is a bug in FreeBSD's "readdir_r" function in versions 4.5 and earlier that can cause a SEGV when reading large directories. A patch for FreeBSD libc is available (see http://www.freebsd.org/cgi/query-pr.cgi?pr=misc/30631 ) which has been integrated into FreeBSD 4.6. $^X doesn't always contain a full path in FreeBSD perl 5.8.0 sets $^X where possible to a full path by asking the operating system. On FreeBSD the full path of the perl interpreter is found by reading the symlink /proc/curproc/file. There is a bug on FreeBSD, where the result of reading this symlink is can be wrong in certain circumstances (see http://www.freebsd.org/cgi/query-pr.cgi?pr=35703 ). In these cases perl will fall back to the old behaviour of using C's argv[0] value for $^X. Perl will no longer be part of "base FreeBSD" Not as bad as it sounds--what this means is that Perl will no longer be part of the kernel build system of FreeBSD. Perl will still very probably be part of the "default install", and in any case the latest version will be in the ports system. The first FreeBSD version this change will affect is 5.0, all 4.n versions will keep the status quo. AUTHOR
Nicholas Clark <nick@ccl4.org>, collating wisdom supplied by Slaven Rezic and Tim Bunce. Please report any errors, updates, or suggestions to perlbug@perl.org. perl v5.8.9 2007-11-17 PERLFREEBSD(1)
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