perlfreebsd - Perl version 5 on FreeBSD systems
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 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
<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" value for
Nicholas Clark <firstname.lastname@example.org>, collating wisdom supplied by Slaven Rezic
and Tim Bunce.
Please report any errors, updates, or suggestions to