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+.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.43)
+.\"
+.\" Standard preamble:
+.\" ========================================================================
+.de Sp \" Vertical space (when we can't use .PP)
+.if t .sp .5v
+.if n .sp
+..
+.de Vb \" Begin verbatim text
+.ft CW
+.nf
+.ne \\$1
+..
+.de Ve \" End verbatim text
+.ft R
+.fi
+..
+.\" Set up some character translations and predefined strings. \*(-- will
+.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
+.\" double quote, and \*(R" will give a right double quote. \*(C+ will
+.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
+.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
+.\" nothing in troff, for use with C<>.
+.tr \(*W-
+.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
+.ie n \{\
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+. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
+. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
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+. ds C' ""
+'br\}
+.el\{\
+. ds -- \|\(em\|
+. ds PI \(*p
+. ds L" ``
+. ds R" ''
+. ds C`
+. ds C'
+'br\}
+.\"
+.\" Escape single quotes in literal strings from groff's Unicode transform.
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\"
+.\" If the F register is >0, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
+.\" entries marked with X<> in POD. Of course, you'll have to process the
+.\" output yourself in some meaningful fashion.
+.\"
+.\" Avoid warning from groff about undefined register 'F'.
+.de IX
+..
+.nr rF 0
+.if \n(.g .if rF .nr rF 1
+.if (\n(rF:(\n(.g==0)) \{\
+. if \nF \{\
+. de IX
+. tm Index:\\$1\t\\n%\t"\\$2"
+..
+. if !\nF==2 \{\
+. nr % 0
+. nr F 2
+. \}
+. \}
+.\}
+.rr rF
+.\" ========================================================================
+.\"
+.IX Title "PERLFREEBSD 1"
+.TH PERLFREEBSD 1 "2023-11-25" "perl v5.36.0" "Perl Programmers Reference Guide"
+.\" For nroff, turn off justification. Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH "NAME"
+perlfreebsd \- Perl version 5 on FreeBSD systems
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+This document describes various features of FreeBSD that will affect how Perl
+version 5 (hereafter just Perl) is compiled and/or runs.
+.SS "FreeBSD core dumps from readdir_r with ithreads"
+.IX Subsection "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
+\&\f(CW\*(C`readdir_r\*(C'\fR function in versions 4.5 and earlier that can cause a \s-1SEGV\s0 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.
+.ie n .SS "$^X doesn't always contain a full path in FreeBSD"
+.el .SS "\f(CW$^X\fP doesn't always contain a full path in FreeBSD"
+.IX Subsection "$^X doesn't always contain a full path in FreeBSD"
+perl sets \f(CW$^X\fR where possible to a full path by asking the operating
+system. On FreeBSD the full path of the perl interpreter is found by using
+\&\f(CW\*(C`sysctl\*(C'\fR with \f(CW\*(C`KERN_PROC_PATHNAME\*(C'\fR if that is supported, else by reading
+the symlink \fI/proc/curproc/file\fR. 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
+\&\f(CW\*(C`argv[0]\*(C'\fR value for \f(CW$^X\fR.
+.SH "AUTHOR"
+.IX Header "AUTHOR"
+Nicholas Clark <nick@ccl4.org>, collating wisdom supplied by Slaven Rezic
+and Tim Bunce.
+.PP
+Please report any errors, updates, or suggestions to
+<https://github.com/Perl/perl5/issues>.