[inseperable changes from patch from perl-5.003_95 to perl-5.003_86]

[editor's note: this commit was prepared manually so may differ in
minor ways to other inseperable changes commits]

 CORE LANGUAGE CHANGES

  Title:  "Support $ENV{PERL5OPT}"
   From:  Chip Salzenberg
  Files:  perl.c pod/perldiag.pod pod/perldelta.pod pod/perlrun.pod

  Title:  "Implement void context, in which C<wantarray> is undef"
   From:  Chip Salzenberg
  Files:  cop.h doop.c dump.c global.sym gv.c op.c op.h perl.c
          pod/perlcall.pod pod/perldelta.pod pod/perlfunc.pod
          pod/perlguts.pod pod/perlsub.pod pp.c pp_ctl.c pp_hot.c
          pp_sys.c proto.h

  Title:  "Don't look up &AUTOLOAD in @ISA when calling plain function"
   From:  Chip Salzenberg
  Files:  global.sym gv.c lib/Text/ParseWords.pm pod/perldelta.pod
          pp_hot.c proto.h t/op/method.t

  Title:  "Allow closures to be constant subroutines"
   From:  Chip Salzenberg
  Files:  op.c

  Title:  "Make C<scalar(reverse)> mean C<scalar(reverse $_)>"
   From:  Chip Salzenberg
  Files:  pp.c

  Title:  "Fix lexical suicide from C<my $x = $x> in sub"
   From:  Chip Salzenberg
  Files:  op.c

  Title:  "Make "Unrecog. char." fatal, and update its doc"
   From:  Chip Salzenberg
  Files:  pod/perldiag.pod toke.c

 CORE PORTABILITY

  Title:  "safefree() mismatch"
   From:  Roderick Schertler
 Msg-ID:  <21338.859653381@eeyore.ibcinc.com>
   Date:  Sat, 29 Mar 1997 11:36:21 -0500
  Files:  util.c

    (applied based on p5p patch as commit id 9b9b466fb02dc96c81439bafbb3b2da55238cfd2)

  Title:  "Win32 update (seven patches)"
   From:  Gurusamy Sarathy and Nick Ing-Simmons
  Files:  EXTERN.h MANIFEST win32/Makefile win32/perl.mak
          win32/perl.rc win32/perldll.mak win32/makedef.pl
          win32/modules.mak win32/win32io.c win32/bin/pl2bat.bat

 OTHER CORE CHANGES

  Title:  "Report PERL* environment variables in -V and perlbug"
   From:  Chip Salzenberg
  Files:  perl.c utils/perlbug.PL

  Title:  "Typo in perl.c: Printing NO_EMBED for perl -V"
   From:  Gisle Aas
 Msg-ID:  <199703301922.VAA13509@furubotn.sn.no>
   Date:  Sun, 30 Mar 1997 21:22:11 +0200
  Files:  perl.c

    (applied based on p5p patch as commit id b6c639e4b1912ad03b9b10ba9518d96bd0a6cfaf)

  Title:  "Don't let C<$var = $var> untaint $var"
   From:  Chip Salzenberg
  Files:  pp_hot.c pp_sys.c sv.h t/op/taint.t

  Title:  "Fix autoviv bug in C<my $x; ++$x->{KEY}>"
   From:  Chip Salzenberg
  Files:  pp_hot.c

  Title:  "Re: 5.004's new srand() default seed"
   From:  Hallvard B Furuseth
 Msg-ID:  <199703302219.AAA20998@bombur2.uio.no>
   Date:  Mon, 31 Mar 1997 00:19:13 +0200 (MET DST)
  Files:  pp.c

    (applied based on p5p patch as commit id d7d933a26349f945f93b2f0dbf85b773d8ca3219)

  Title:  "Re: embedded perl and top_env problem "
   From:  Gurusamy Sarathy
 Msg-ID:  <199703280031.TAA05711@aatma.engin.umich.edu>
   Date:  Thu, 27 Mar 1997 19:31:42 -0500
  Files:  gv.c interp.sym perl.c perl.h pp_ctl.c pp_sys.c scope.h util.c

    (applied based on p5p patch as commit id f289f7d2518e7a8a82114282e774adf50fa6ce85)

  Title:  "Define and use new macro: boolSV()"
   From:  Tim Bunce
  Files:  gv.c lib/ExtUtils/typemap os2/os2.c pp.c pp_hot.c pp_sys.c
          sv.c sv.h universal.c vms/vms.c

  Title:  "Re: strict @F"
   From:  Hallvard B Furuseth
 Msg-ID:  <199703252110.WAA16038@bombur2.uio.no>
   Date:  Tue, 25 Mar 1997 22:10:33 +0100 (MET)
  Files:  toke.c

    (applied based on p5p patch as commit id dfd44a5c8c8dd4c001c595debfe73d011a96d844)

  Title:  "Try harder to identify errors at EOF"
   From:  Chip Salzenberg
  Files:  toke.c

  Title:  "Minor string change in toke.c: 'bareword'"
   From:  lvirden@cas.org
 Msg-ID:  <1997Mar27.130247.1911552@hmivax.humgen.upenn.edu>
   Date:  Thu, 27 Mar 1997 13:02:46 -0500 (EST)
  Files:  toke.c

    (applied based on p5p patch as commit id 9b56c8f8085a9e773ad87c6b3c1d0b5e39dbc348)

  Title:  "Improve diagnostic on \r in program text"
   From:  Chip Salzenberg
  Files:  pod/perldiag.pod toke.c

  Title:  "Make Sock_size_t typedef work right"
   From:  Chip Salzenberg
  Files:  perl.h pp_sys.c

 LIBRARY AND EXTENSIONS

  Title:  "New module constant.pm"
   From:  Tom Phoenix
  Files:  MANIFEST lib/constant.pm op.c pp.c t/pragma/constant.t

  Title:  "Remove chat2"
   From:  Chip Salzenberg
  Files:  MANIFEST lib/chat2.inter lib/chat2.pl

  Title:  "Include CGI.pm 2.32"
   From:  Chip Salzenberg
  Files:  MANIFEST eg/cgi/* lib/CGI.pm lib/CGI/Apache.pm
          lib/CGI/Carp.pm lib/CGI/Fast.pm lib/CGI/Push.pm
          lib/CGI/Switch.pm

 UTILITIES

  Title:  "Tom C's Pod::Html and html tools, as of 30 March 97"
   From:  Chip Salzenberg
  Files:  MANIFEST installhtml lib/Pod/Html.pm pod/pod2html.PL

  Title:  "Fix path bugs in installhtml"
   From:  Robin Barker <rmb1@cise.npl.co.uk>
 Msg-ID:  <3180.9703270906@tempest.cise.npl.co.uk>
   Date:  Thu, 27 Mar 97 09:06:14 GMT
  Files:  installhtml

  Title:  "Make perlbug say that it's only for core Perl bugs"
   From:  Chip Salzenberg
  Files:  utils/perlbug.PL

 DOCUMENTATION

  Title:  "Document autouse and constant; update diagnostics"
   From:  Chip Salzenberg
  Files:  pod/perldelta.pod

  Title:  "Suggest to upgraders that they try '-w' again"
   From:  Hallvard B Furuseth
 Msg-ID:  <199703251901.UAA15982@bombur2.uio.no>
   Date:  Tue, 25 Mar 1997 20:01:26 +0100 (MET)
  Files:  pod/perldelta.pod

    (applied based on p5p patch as commit id 4176c059b9ba6b022e99c44270434a5c3e415b73)

  Title:  "Improve and update documentation of constant subs"
   From:  Tom Phoenix <rootbeer@teleport.com>
 Msg-ID:  <Pine.GSO.3.96.970331122546.14185C-100000@kelly.teleport.com>
   Date:  Mon, 31 Mar 1997 13:05:54 -0800 (PST)
  Files:  pod/perlsub.pod

  Title:  "Improve documentation of C<return>"
   From:  Chip Salzenberg
  Files:  pod/perlfunc.pod pod/perlsub.pod

  Title:  "perlfunc.pod patch"
   From:  Gisle Aas
 Msg-ID:  <199703262159.WAA17531@furubotn.sn.no>
   Date:  Wed, 26 Mar 1997 22:59:23 +0100
  Files:  pod/perlfunc.pod

    (applied based on p5p patch as commit id 35a731fcbcd7860eb497d6598f3f77b8746319c4)

  Title:  "Use 'while (defined($x = <>)) {}', per <gnat@frii.com>"
   From:  Chip Salzenberg
  Files:  configpm lib/Term/Cap.pm perlsh pod/perlipc.pod pod/perlop.pod
          pod/perlsub.pod pod/perlsyn.pod pod/perltrap.pod
          pod/perlvar.pod win32/bin/search.bat

  Title:  "Document and test C<%> behavior with negative operands"
   From:  Chip Salzenberg
  Files:  pod/perlop.pod t/op/arith.t

  Title:  "Update docs on $]"
   From:  Chip Salzenberg
  Files:  pod/perlvar.pod

  Title:  "perlvar.pod patch"
   From:  Gisle Aas
 Msg-ID:  <199703261254.NAA10237@bergen.sn.no>
   Date:  Wed, 26 Mar 1997 13:54:00 +0100
  Files:  pod/perlvar.pod

    (applied based on p5p patch as commit id 0aa182cb0caa3829032904b9754807b1b7418509)

  Title:  "Fix example of C<or> vs. C<||>"
   From:  Chip Salzenberg
  Files:  pod/perlsyn.pod

  Title:  "Pod usage and spelling patch"
   From:  Larry W. Virden
  Files:  pod/*.pod

  Title:  "Pod updates"
   From:  "Cary D. Renzema" <caryr@mxim.com>
 Msg-ID:  <199703262353.PAA01819@macs.mxim.com>
   Date:  Wed, 26 Mar 1997 15:53:22 -0800 (PST)
  Files:  pod/*.pod

    (applied based on p5p patch as commit id 5695b28edc67a3f45e8a0f25755d07afef3660ac)

1 files changed, 560 insertions, 0 deletions

diff --git a/installhtml b/installhtml
new file mode 100644
index 0000000000..a33dec3895
--- /dev/null
+++ b/installhtml
@@ -0,0 +1,560 @@
+#!/usr/bin/perl -w
+
+use Config;		# for config options in the makefile
+use Getopt::Long;	# for command-line parsing
+use Cwd;
+use Pod::Html;
+
+umask 022;
+
+=head1 NAME
+
+installhtml - converts a collection of POD pages to HTML format.
+
+=head1 SYNOPSIS
+
+    installhtml  [--help] [--podpath=<name>:...:<name>] [--podroot=<name>]
+         [--htmldir=<name>] [--htmlroot=<name>]  [--norecurse] [--recurse]
+         [--splithead=<name>,...,<name>]   [--splititem=<name>,...,<name>]
+	 [--libpods=<name>,...,<name>]  [--verbose]
+
+=head1 DESCRIPTION
+
+I<installhtml> converts a collection of POD pages to a corresponding
+collection of HTML pages.  This is primarily used to convert the pod
+pages found in the perl distribution.
+
+=head1 OPTIONS
+
+=over 4
+
+=item B<--help> help
+
+Displays the usage.
+
+=item B<--podpath> POD search path
+
+The list of diretories to search for .pod and .pm files to be converted.
+Default is `podroot/.'.
+
+=item B<--podroot> POD search path base directory
+
+The base directory to search for all .pod and .pm files to be converted.
+Default is current directory.
+
+=item B<--htmldir> HTML destination directory
+
+The base directory which all HTML files will be written to.  This should
+be a path relative to the filesystem, not the resulting URL.
+
+=item B<--htmlroot> URL base directory
+
+The base directory which all resulting HTML files will be visible at in
+a URL.  The default is `/'.
+
+=item B<--recurse> recurse on subdirectories
+
+Whether or not to convert all .pm and .pod files found in subdirectories
+too.  Default is to not recurse.
+
+=item B<--splithead> POD files to split on =head directive
+
+Colon-seperated list of pod files to split by the =head directive.  These
+files should have names specified relative to podroot.
+
+=item B<--splititem> POD files to split on =item directive
+
+Colon-seperated list of all pod files to split by the =item directive.
+I<installhtml> does not do the actual split, rather it invokes I<splitpod>
+to do the dirty work.  As with --splithead, these files should have names
+specified relative to podroot.
+
+=item B<--libpods> library PODs for LE<lt>E<gt> links
+
+Colon-seperated list of "library" pod files.  This is the same list that
+will be passed to pod2html when any pod is converted.
+
+=item B<--verbose> verbose output
+
+Self-explanatory.
+
+=back
+
+=head1 EXAMPLE
+
+The following command-line is an example of the one we use to convert
+perl documentation:
+
+    ./installhtml --podpath=lib:ext:pod:vms   \
+		  --podroot=/usr/src/perl     \
+                  --htmldir=/perl/nmanual     \
+		  --htmlroot=/perl/nmanual    \
+		  --splithead=pod/perlipc.pod \
+		  --splititem=pod/perlfunc    \
+		  --libpods=perlfunc:perlguts:perlvar:perlrun:perlop \
+                  --recurse \
+		  --verbose
+
+=head1 AUTHOR
+
+Chris Hall E<lt>hallc@cs.colorado.eduE<gt>
+
+=head1 TODO
+
+=cut
+
+$usage =<<END_OF_USAGE;
+Usage: $0 --help --podpath=<name>:...:<name> --podroot=<name>
+         --htmldir=<name> --htmlroot=<name> --norecurse --recurse
+         --splithead=<name>,...,<name> --splititem=<name>,...,<name>
+	 --libpods=<name>,...,<name> --verbose
+
+    --help      - this message
+    --podpath   - colon-separated list of directories containing .pod and
+                  .pm files to be converted (. by default).
+    --podroot   - filesystem base directory from which all relative paths in
+                  podpath stem (default is .).
+    --htmldir   - directory to store resulting html files in relative
+                  to the filesystem (\$podroot/html by default). 
+    --htmlroot  - http-server base directory from which all relative paths
+                  in podpath stem (default is /).
+    --libpods   - comma-separated list of files to search for =item pod
+                  directives in as targets of C<> and implicit links (empty
+                  by default).
+    --norecurse - don't recurse on those subdirectories listed in podpath.
+                  (default behavior).
+    --recurse   - recurse on those subdirectories listed in podpath
+    --splithead - comma-separated list of .pod or .pm files to split.  will
+                  split each file into several smaller files at every occurance
+                  of a pod =head[1-6] directive.
+    --splititem - comma-separated list of .pod or .pm files to split using
+                  splitpod.
+    --splitpod  - where the program splitpod can be found (\$podroot/pod by
+                  default).
+    --verbose   - self-explanatory.
+
+END_OF_USAGE
+
+@libpods = ();
+@podpath = ( "." );	# colon-separated list of directories containing .pod
+			# and .pm files to be converted.
+$podroot = ".";		# assume the pods we want are here
+$htmldir = "";		# nothing for now...
+$htmlroot = "/";	# default value
+$recurse = 0;		# default behavior
+@splithead = ();	# don't split any files by default
+@splititem = ();	# don't split any files by default
+$splitpod = "";		# nothing for now.
+
+$verbose = 0; 	    	# whether or not to print debugging info
+
+$pod2html = "pod/pod2html";
+
+
+# parse the command-line
+$result = GetOptions( qw(
+	help
+	podpath=s
+	podroot=s
+	htmldir=s
+	htmlroot=s
+	libpods=s
+	recurse!
+	splithead=s
+	splititem=s
+	splitpod=s
+	verbose
+));
+usage("invalid parameters") unless $result;
+parse_command_line();
+
+
+# set these variables to appropriate values if the user didn't specify
+#  values for them.
+$htmldir = "$htmlroot/html" unless $htmldir;
+$splitpod = "$podroot/pod" unless $splitpod;
+
+
+# make sure that the destination directory exists
+(mkdir($htmldir, 0755) ||
+	die "$0: cannot make directory $htmldir: $!\n") if ! -d $htmldir;
+
+
+# the following array will eventually contain files that are to be
+# ignored in the conversion process.  these are files that have been
+# process by splititem or splithead and should not be converted as a
+# result.
+@ignore = ();
+
+
+# split pods.  its important to do this before convert ANY pods because
+#  it may effect some of the links
+@splitdirs = ();    # files in these directories won't get an index
+split_on_head($podroot, $htmldir, \@splitdirs, \@ignore, @splithead);
+split_on_item($podroot, \@splitdirs, \@ignore, @splititem);
+
+
+# convert the pod pages found in @poddirs
+#warn "converting files\n" if $verbose;
+#warn "\@ignore\t= @ignore\n" if $verbose;
+foreach $dir (@podpath) {
+    installdir($dir, $recurse, $podroot, \@splitdirs, \@ignore);
+}
+
+
+# now go through and create master indices for each pod we split
+foreach $dir (@splititem) {
+    print "creating index $htmldir/$dir.html\n" if $verbose;
+    create_index("$htmldir/$dir.html", "$htmldir/$dir");
+}
+
+foreach $dir (@splithead) {
+    $dir .= ".pod" unless $dir =~ /(\.pod|\.pm)$/;
+    # let pod2html create the file
+    runpod2html($dir, 1);
+
+    # now go through and truncate after the index
+    $dir =~ /^(.*?)(\.pod|\.pm)?$/sm;
+    $file = "$htmldir/$1";
+    print "creating index $file.html\n" if $verbose;
+
+    # read in everything until what would have been the first =head
+    # directive, patching the index as we go.
+    open(H, "<$file.html") ||
+	die "$0: error opening $file.html for input: $!\n";
+    $/ = "";
+    @data = ();
+    while (<H>) {
+	last if /NAME=/;
+	s,HREF="#(.*)">,HREF="$file/$1.html">,g;
+	push @data, $_;
+    } 
+    close(H);
+
+    # now rewrite the file 
+    open(H, ">$file.html") ||
+	die "$0: error opening $file.html for output: $!\n";
+    print H "@data\n";
+    close(H);
+}
+
+##############################################################################
+
+
+sub usage {
+    warn "$0: @_\n" if @_;
+    die $usage;
+}
+
+
+sub parse_command_line {
+    usage() if defined $opt_help;
+    $opt_help = ""; 	    	    # make -w shut up
+
+    # list of directories
+    @podpath   = split(":", $opt_podpath) if defined $opt_podpath;
+
+    # lists of files
+    @splithead = split(",", $opt_splithead) if defined $opt_splithead;
+    @splititem = split(",", $opt_splititem) if defined $opt_splititem;
+    @libpods   = split(",", $opt_libpods) if defined $opt_libpods;
+
+    $htmldir  = $opt_htmldir	    if defined $opt_htmldir;
+    $htmlroot = $opt_htmlroot	    if defined $opt_htmlroot;
+    $podroot  = $opt_podroot	    if defined $opt_podroot;
+    $splitpod = $opt_splitpod	    if defined $opt_splitpod;
+
+    $recurse  = $opt_recurse	    if defined $opt_recurse;
+    $verbose  = $opt_verbose	    if defined $opt_verbose;
+}
+
+
+sub create_index {
+    my($html, $dir) = @_;
+    my(@files, @filedata, @index, $file);
+
+    # get the list of .html files in this directory
+    opendir(DIR, $dir) ||
+	die "$0: error opening directory $dir for reading: $!\n";
+    @files = sort(grep(/\.html$/, readdir(DIR)));
+    closedir(DIR);
+
+    open(HTML, ">$html") ||
+	die "$0: error opening $html for output: $!\n";
+
+    # for each .html file in the directory, extract the index
+    #	embedded in the file and throw it into the big index.
+    print HTML "<DL COMPACT>\n";
+    foreach $file (@files) {
+	$/ = "";
+
+	open(IN, "<$dir/$file") ||
+	    die "$0: error opening $dir/$file for input: $!\n";
+	@filedata = <IN>;
+	close(IN);
+
+	# pull out the NAME section
+	($name) = grep(/NAME=/, @filedata);
+	$name =~ m,/H1>\s(\S+)\s[\s-]*(.*?)\s*$,sm;
+	print HTML qq(<A HREF="$dir/$file">);
+	print HTML "<DT>$1</A><DD>$2\n" if defined $1;
+#	print HTML qq(<A HREF="$dir/$file">$1</A><BR>\n") if defined $1;
+
+	next;
+
+	@index = grep(/<!-- INDEX BEGIN -->.*<!-- INDEX END -->/s,
+		    @filedata);
+	for (@index) {
+	    s/<!-- INDEX BEGIN -->(\s*<!--)(.*)(-->\s*)<!-- INDEX END -->/$2/s;
+	    s,#,$dir/$file#,g;
+	    # print HTML "$_\n";
+	    print HTML "$_\n<P><HR><P>\n";
+	}
+    }
+    print HTML "</DL>\n";
+
+    close(HTML);
+}
+
+
+sub split_on_head {
+    my($podroot, $htmldir, $splitdirs, $ignore, @splithead) = @_;
+    my($pod, $dirname, $filename);
+
+    # split the files specified in @splithead on =head[1-6] pod directives
+    print "splitting files by head.\n" if $verbose && $#splithead >= 0;
+    foreach $pod (@splithead) {
+	# figure out the directory name and filename
+	$pod      =~ s,^([^/]*)$,/$1,;
+	$pod      =~ m,(.*?)/(.*?)(\.pod)?$,;
+	$dirname  = $1;
+	$filename = "$2.pod";
+
+	# since we are splitting this file it shouldn't be converted.
+	push(@$ignore, "$podroot/$dirname/$filename");
+
+	# split the pod
+	splitpod("$podroot/$dirname/$filename", "$podroot/$dirname", $htmldir,
+	    $splitdirs);
+    }
+}
+
+
+sub split_on_item {
+    my($podroot, $splitdirs, $ignore, @splititem) = @_;
+    my($pwd, $dirname, $filename);
+
+    print "splitting files by item.\n" if $verbose && $#splititem >= 0;
+    $pwd = getcwd();
+    foreach $pod (@splititem) {
+	# figure out the directory to split into
+	$pod      =~ s,^([^/]*)$,/$1,;
+	$pod      =~ m,(.*?)/(.*?)(\.pod)?$,;
+	$dirname  = "$1/$2";
+	$filename = "$2.pod";
+
+	# since we are splitting this file it shouldn't be converted.
+	push(@$ignore, "$podroot/$dirname.pod");
+
+	# split the pod
+	push(@$splitdirs, "$podroot/$dirname");
+	if (! -d "$podroot/$dirname") {
+	    mkdir("$podroot/$dirname", 0755) ||
+		    die "$0: error creating directory $podroot/$dirname: $!\n";
+	}
+	chdir("$podroot/$dirname") ||
+	    die "$0: error changing to directory $podroot/$dirname: $!\n";
+	system("./splitpod", "../$filename");
+    }
+    chdir($pwd);
+}
+
+
+#
+# splitpod - splits a .pod file into several smaller .pod files
+#  where a new file is started each time a =head[1-6] pod directive
+#  is encountered in the input file.
+#
+sub splitpod {
+    my($pod, $poddir, $htmldir, $splitdirs) = @_;
+    my(@poddata, @filedata, @heads);
+    my($file, $i, $j, $prevsec, $section, $nextsec);
+
+    print "splitting $pod\n" if $verbose;
+
+    # read the file in paragraphs
+    $/ = "";
+    open(SPLITIN, "<$pod") ||
+	die "$0: error opening $pod for input: $!\n";
+    @filedata = <SPLITIN>;
+    close(SPLITIN) ||
+	die "$0: error closing $pod: $!\n";
+
+    # restore the file internally by =head[1-6] sections
+    @poddata = ();
+    for ($i = 0, $j = -1; $i <= $#filedata; $i++) {
+	$j++ if ($filedata[$i] =~ /^\s*=head[1-6]/);
+	if ($j >= 0) { 
+	    $poddata[$j]  = "" unless defined $poddata[$j];
+	    $poddata[$j] .= "\n$filedata[$i]" if $j >= 0;
+	}
+    }
+
+    # create list of =head[1-6] sections so that we can rewrite
+    #  L<> links as necessary.
+    %heads = ();
+    foreach $i (0..$#poddata) {
+	$heads{htmlize($1)} = 1 if $poddata[$i] =~ /=head[1-6]\s+(.*)/;
+    }
+
+    # create a directory of a similar name and store all the
+    #  files in there
+    $pod =~ s,.*/(.*),$1,;	# get the last part of the name
+    $dir = $pod;
+    $dir =~ s/\.pod//g;
+    push(@$splitdirs, "$poddir/$dir");
+    mkdir("$poddir/$dir", 0755) ||
+	die "$0: could not create directory $poddir/$dir: $!\n"
+	unless -d "$poddir/$dir";
+
+    $poddata[0] =~ /^\s*=head[1-6]\s+(.*)/;
+    $section    = "";
+    $nextsec    = $1;
+
+    # for each section of the file create a separate pod file
+    for ($i = 0; $i <= $#poddata; $i++) {
+	# determine the "prev" and "next" links
+	$prevsec = $section;
+	$section = $nextsec;
+	if ($i < $#poddata) {
+	    $poddata[$i+1] =~ /^\s*=head[1-6]\s+(.*)/;
+	    $nextsec       = $1;
+	} else {
+	    $nextsec = "";
+	}
+
+	# determine an appropriate filename (this must correspond with
+	#  what pod2html will try and guess)
+	# $poddata[$i] =~ /^\s*=head[1-6]\s+(.*)/;
+	$file = "$dir/" . htmlize($section) . ".pod";
+
+	# create the new .pod file
+	print "\tcreating $poddir/$file\n" if $verbose;
+	open(SPLITOUT, ">$poddir/$file") ||
+	    die "$0: error opening $poddir/$file for output: $!\n";
+	$poddata[$i] =~ s,L<([^<>]*)>,
+			    defined $heads{htmlize($1)} ? "L<$dir/$1>" : "L<$1>"
+			 ,ge;
+	print SPLITOUT $poddata[$i]."\n\n";
+	print SPLITOUT "=over 4\n\n";
+	print SPLITOUT "=item *\n\nBack to L<$dir/\"$prevsec\">\n\n" if $prevsec;
+	print SPLITOUT "=item *\n\nForward to L<$dir/\"$nextsec\">\n\n" if $nextsec;
+	print SPLITOUT "=item *\n\nUp to L<$dir>\n\n";
+	print SPLITOUT "=back\n\n";
+	close(SPLITOUT) ||
+	    die "$0: error closing $poddir/$file: $!\n";
+    }
+}
+
+
+#
+# installdir - takes care of converting the .pod and .pm files in the
+#  current directory to .html files and then installing those.
+#
+sub installdir {
+    my($dir, $recurse, $podroot, $splitdirs, $ignore) = @_;
+    my(@dirlist, @podlist, @pmlist, $doindex);
+
+    @dirlist = ();	# directories to recurse on
+    @podlist = ();	# .pod files to install
+    @pmlist  = ();	# .pm files to install
+
+    # should files in this directory get an index?
+    $doindex = (grep($_ eq "$podroot/$dir", @$splitdirs) ? 0 : 1);
+
+    opendir(DIR, "$podroot/$dir")
+	|| die "$0: error opening directory $podroot/$dir: $!\n";
+
+    # find the directories to recurse on
+    @dirlist = map { "$dir/$_" }
+	grep(-d "$podroot/$dir/$_" && !/^\.{1,2}/, readdir(DIR)) if $recurse;
+    rewinddir(DIR);
+
+    # find all the .pod files within the directory
+    @podlist = map { /^(.*)\.pod$/; "$dir/$1" }
+	grep(! -d "$podroot/$dir/$_" && /\.pod$/, readdir(DIR));
+    rewinddir(DIR);
+
+    # find all the .pm files within the directory
+    @pmlist = map { /^(.*)\.pm$/; "$dir/$1" }
+	grep(! -d "$podroot/$dir/$_" && /\.pm$/, readdir(DIR));
+
+    closedir(DIR);
+
+    # recurse on all subdirectories we kept track of
+    foreach $dir (@dirlist) {
+	installdir($dir, $recurse, $podroot, $splitdirs, $ignore);
+    }
+
+    # install all the pods we found
+    foreach $pod (@podlist) {
+	# check if we should ignore it.
+	next if grep($_ eq "$podroot/$pod.pod", @$ignore);
+
+	# check if a .pm files exists too
+	if (grep($_ eq "$pod.pm", @pmlist)) {
+	    print  "$0: Warning both `$podroot/$pod.pod' and "
+		. "`$podroot/$pod.pm' exist, using pod\n";
+	    push(@ignore, "$pod.pm");
+	}
+	runpod2html("$pod.pod", $doindex);
+    }
+
+    # install all the .pm files we found
+    foreach $pm (@pmlist) {
+	# check if we should ignore it.
+	next if grep($_ eq "$pm.pm", @ignore);
+
+	runpod2html("$pm.pm", $doindex);
+    }
+}
+
+
+#
+# runpod2html - invokes pod2html to convert a .pod or .pm file to a .html
+#  file.
+#
+sub runpod2html {
+    my($pod, $doindex) = @_;
+    my($html, $i, $dir, @dirs);
+
+    $html = $pod;
+    $html =~ s/\.(pod|pm)$/.html/g;
+
+    # make sure the destination directories exist
+    @dirs = split("/", $html);
+    $dir  = "$htmldir/";
+    for ($i = 0; $i < $#dirs; $i++) {
+	if (! -d "$dir$dirs[$i]") {
+	    mkdir("$dir$dirs[$i]", 0755) ||
+		die "$0: error creating directory $dir$dirs[$i]: $!\n";
+	}
+	$dir .= "$dirs[$i]/";
+    }
+
+    # invoke pod2html
+    print "$podroot/$pod => $htmldir/$html\n" if $verbose;
+#system("./pod2html",
+        Pod::Html'pod2html(
+        #Pod::Html'pod2html($pod2html,
+	"--htmlroot=$htmlroot",
+	"--podpath=".join(":", @podpath),
+	"--podroot=$podroot", "--netscape",
+	($doindex ? "--index" : "--noindex"),
+	"--" . ($recurse ? "" : "no") . "recurse",
+	($#libpods >= 0) ? "--libpods=" . join(":", @libpods) : "",
+	"--infile=$podroot/$pod", "--outfile=$htmldir/$html");
+    die "$0: error running $pod2html: $!\n" if $?;
+}
+
+sub htmlize { htmlify(0, @_) }