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perlfreebsd(1)         Perl Programmers Reference Guide         perlfreebsd(1)



NAME

       perlfreebsd - 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
       <https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=30631>) which has
       been integrated into FreeBSD 4.6.

   $^X doesn't always contain a full path in FreeBSD
       perl 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
       using "sysctl" with "KERN_PROC_PATHNAME" if that is supported, else by
       reading the symlink /proc/curproc/file. FreeBSD 7 and earlier has a bug
       where either approach sometimes returns an incorrect value (see
       <https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=35703>).  In these
       cases perl will fall back to the old behaviour of using C's "argv[0]"
       value for $^X.


AUTHOR

       Nicholas Clark <nick@ccl4.org>, collating wisdom supplied by Slaven
       Rezic and Tim Bunce.

       Please report any errors, updates, or suggestions to
       <https://github.com/Perl/perl5/issues>.

perl v5.38.2                      2023-11-28                    perlfreebsd(1)

perl 5.38.2 - Generated Fri Nov 29 16:08:37 CST 2024
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