From @cpansprout

hints/darwin.sh pretends that setruid and similar functions do not
exist, as they were buggy in earlier versions of Mac OS X. Leopard and
Snow Leopard (I don’t know about Tiger) are fine. The attached patch
re-enables those on recent versions.

Use of uninitialized value $category in concatenation (.) or string
at /usr/local/bin/perlbug5.11.5 line 645.
Use of uninitialized value $severity in concatenation (.) or string
at /usr/local/bin/perlbug5.11.5 line 645.

Flags​:
  category=install
  severity=low

Site configuration information for perl 5.11.5​:

Configured by sprout at Sat Feb 20 23​:31​:20 PST 2010.

Summary of my perl5 (revision 5 version 11 subversion 5 patch
v5.11.4-143-gb3289bd) configuration​:
  Snapshot of​: b3289bd
  Platform​:
  osname=darwin, osvers=10.0.0, archname=darwin-2level
  uname='darwin pint.local 10.0.0 darwin kernel version 10.0.0​: fri
jul 31 22​:47​:34 pdt 2009; root​:xnu-1456.1.25~1release_i386 i386 '
  config_args='-de -Dusedevel'
  hint=recommended, useposix=true, d_sigaction=define
  useithreads=undef, usemultiplicity=undef
  useperlio=define, d_sfio=undef, uselargefiles=define,
usesocks=undef
  use64bitint=undef, use64bitall=undef, uselongdouble=undef
  usemymalloc=n, bincompat5005=undef
  Compiler​:
  cc='cc', ccflags ='-fno-common -DPERL_DARWIN -no-cpp-precomp -fno-
strict-aliasing -pipe -fstack-protector -I/usr/local/include',
  optimize='-O3',
  cppflags='-no-cpp-precomp -fno-common -DPERL_DARWIN -no-cpp-
precomp -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/
include'
  ccversion='', gccversion='4.2.1 (Apple Inc. build 5646)',
gccosandvers=''
  intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
  d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
  ivtype='long', ivsize=4, nvtype='double', nvsize=8,
Off_t='off_t', lseeksize=8
  alignbytes=8, prototype=define
  Linker and Libraries​:
  ld='env MACOSX_DEPLOYMENT_TARGET=10.3 cc', ldflags =' -fstack-
protector -L/usr/local/lib'
  libpth=/usr/local/lib /usr/lib
  libs=-ldbm -ldl -lm -lutil -lc
  perllibs=-ldl -lm -lutil -lc
  libc=/usr/lib/libc.dylib, so=dylib, useshrplib=false,
libperl=libperl.a
  gnulibc_version=''
  Dynamic Linking​:
  dlsrc=dl_dlopen.xs, dlext=bundle, d_dlsymun=undef, ccdlflags=' '
  cccdlflags=' ', lddlflags=' -bundle -undefined dynamic_lookup -L/
usr/local/lib -fstack-protector'

Locally applied patches​:

@​INC for perl 5.11.5​:
  /usr/local/lib/perl5/site_perl/5.11.5/darwin-2level
  /usr/local/lib/perl5/site_perl/5.11.5
  /usr/local/lib/perl5/5.11.5/darwin-2level
  /usr/local/lib/perl5/5.11.5
  /usr/local/lib/perl5/site_perl
  .

Environment for perl 5.11.5​:
  DYLD_LIBRARY_PATH (unset)
  HOME=/Users/sprout
  LANG=en_US.UTF-8
  LANGUAGE (unset)
  LD_LIBRARY_PATH (unset)
  LOGDIR (unset)
  PATH=/usr/bin​:/bin​:/usr/sbin​:/sbin​:/usr/local/bin​:/usr/X11/bin​:/
usr/local/bin
  PERL_BADLANG (unset)
  SHELL=/bin/bash

From @cpansprout

--- blead/hints/darwin.sh	2009-11-19 08:51:38.000000000 -0800
+++ blead-darwin-hints/hints/darwin.sh	2010-02-15 21:00:55.000000000 -0800
@@ -13,11 +13,16 @@ perl_version=`awk '/define[ 	]+PERL_VERS
 perl_subversion=`awk '/define[ 	]+PERL_SUBVERSION/ {print $3}' $src/patchlevel.h`
 version="${perl_revision}.${perl_version}.${perl_subversion}"
 
-# Pretend that Darwin doesn't know about those system calls [perl #24122]
-d_setregid='undef'
-d_setreuid='undef'
-d_setrgid='undef'
-d_setruid='undef'
+# Pretend that Darwin doesn't know about those system calls in Tiger
+# (10.4/darwin 8) and earlier [perl #24122]
+case "$osvers" in
+[1-8].*)
+    d_setregid='undef'
+    d_setreuid='undef'
+    d_setrgid='undef'
+    d_setruid='undef'
+    ;;
+esac
 
 # This was previously used in all but causes three cases
 # (no -Ddprefix=, -Dprefix=/usr, -Dprefix=/some/thing/else)

@cpansprout - Status changed from 'new' to 'resolved'

From @cpansprout

On Sun Feb 21 13​:18​:10 2010, sprout wrote​:

hints/darwin.sh pretends that setruid and similar functions do not
exist, as they were buggy in earlier versions of Mac OS X. Leopard and
Snow Leopard (I don’t know about Tiger) are fine. The attached patch
re-enables those on recent versions.

Applied as 04ec184.

From [Unknown Contact. See original ticket]

On Sun Feb 21 13​:18​:10 2010, sprout wrote​:

hints/darwin.sh pretends that setruid and similar functions do not
exist, as they were buggy in earlier versions of Mac OS X. Leopard and
Snow Leopard (I don’t know about Tiger) are fine. The attached patch
re-enables those on recent versions.

Applied as 04ec184.