llvm/utils/GenLibDeps.pl - third_party/llvm-project - Git at Google

 #!/usr/bin/env perl
 #
 # Program:  GenLibDeps.pl
 #
 # Synopsis: Generate HTML output that shows the dependencies between a set of
 #           libraries. The output of this script should periodically replace
 #           the similar content in the UsingLibraries.html document.
 #
 # Syntax:   GenLibDeps.pl [-flat] <directory_with_libraries_in_it> [path_to_nm_binary]
 #
 use strict;
 use warnings;
 # Parse arguments...
 my $FLAT = 0;
 my $WHY = 0;
 my $PEROBJ = 0;
 my $PEROBJINCL = 0;
 while (scalar(@ARGV) and ($_ = $ARGV[0], /^[-+]/)) {
   shift;
   last if /^--$/;  # Stop processing arguments on --

   # List command line options here...
   if (/^-flat$/)     { $FLAT = 1; next; }
   if (/^-why/)       { $WHY = 1; $FLAT = 1; next; }
   if (/^-perobj$/)    { $PEROBJ = 1; next; }
   if (/^-perobjincl/) { $PEROBJINCL = 1; next;}
   print "Unknown option: $_ : ignoring!\n";
 }

 # Give first option a name.
 my $Directory = $ARGV[0];
 if (!defined($Directory) || ! -d "$Directory") {
   die "First argument must specify the directory containing LLVM libs\n";
 }

 my $nmPath = $ARGV[1];

 # Find the "dot" program
 my $DotPath="";
 if (!$FLAT) {
   chomp($DotPath = `which dot`);
   die "Can't find 'dot'" if (! -x "$DotPath");
 }

 if (defined($ENV{NM})) {
   chomp($nmPath=$ENV{NM});
 }

 if (!defined($nmPath) || $nmPath eq "") {
   chomp($nmPath=`which nm`);
   die "Can't find 'nm'" if (! -x "$nmPath");
 }

 my $ranlibPath;
 if ($PEROBJ) {
   $ranlibPath = $ARGV[2];
   if (defined($ENV{RANLIB})) {
     chomp($ranlibPath=$ENV{RANLIB});
   }

   if (!defined($ranlibPath) || $ranlibPath eq "") {
     chomp($ranlibPath=`which ranlib`);
     die "Can't find 'ranlib'" if (! -x "$ranlibPath");
   }
 }

 # Open the directory and read its contents, sorting by name and differentiating
 # by whether its a library (.a) or an object file (.o)
 opendir DIR,$Directory;
 my @files = readdir DIR;
 closedir DIR;
 my @libs = grep(/libLLVM.*\.(dylib|so|a)$/,sort(@files));
 # Omit the all-of-llvm shared library.
 @libs = grep(!/libLLVM-\d\.\d(svn)?\.(dylib|so)/, @libs);
 my @objs = grep(/LLVM.*\.o$/,sort(@files));

 # Declare the hashes we will use to keep track of the library and object file
 # symbol definitions.
 my %libdefs;
 my %objdefs;

 my %libobjs;
 my %objdeps=();
 # Gather library definitions at object file granularity (optional)
 if ($PEROBJ) {
   foreach my $lib (@libs ) {
     `$ranlibPath $Directory/$lib`;
     my $libpath = $lib;
     $libpath =~ s/^libLLVM(.*)\.a/$1/;
     $libpath =~ s/(.+)CodeGen$/Target\/$1/;
     $libpath =~ s/(.+)AsmPrinter$/Target\/$1\/AsmPrinter/;
     $libpath =~ s/(.+)AsmParser$/Target\/$1\/AsmParser/;
     $libpath =~ s/(.+)Info$/Target\/$1\/TargetInfo/;
     $libpath =~ s/(.+)Disassembler$/Target\/$1\/Disassembler/;
     $libpath =~ s/SelectionDAG/CodeGen\/SelectionDAG/;
     $libpath =~ s/^AsmPrinter/CodeGen\/AsmPrinter/;
     $libpath =~ s/^BitReader/Bitcode\/Reader/;
     $libpath =~ s/^BitWriter/Bitcode\/Writer/;
     $libpath =~ s/^BitstreamReader/Bitstream\/Reader/;
     $libpath =~ s/^BitstreamWriter/Bitstream\/Writer/;
     $libpath =~ s/^MSIL/Target\/MSIL/;
     $libpath =~ s/^Core/IR/;
     $libpath =~ s/^Instrumentation/Transforms\/Instrumentation/;
     $libpath =~ s/^Interpreter/ExecutionEngine\/Interpreter/;
     $libpath =~ s/^JIT/ExecutionEngine\/JIT/;
     $libpath =~ s/^ScalarOpts/Transforms\/Scalar/;
     $libpath =~ s/^TransformUtils/Transforms\/Utils/;
     $libpath =~ s/^ipa/Analysis\/IPA/;
     $libpath =~ s/^ipo/Transforms\/IPO/;
     $libpath = "lib/".$libpath."/";
     open DEFS, "$nmPath -sg $Directory/$lib|";
     while (<DEFS>) {
       chomp;
       if (/^([^ ]*) in ([^ ]*)/) {
         my $objfile = $libpath.$2;
         $objdefs{$1} = $objfile;
         $objdeps{$objfile} = {};
         $libobjs{$lib}{$objfile}=1;
 #        my $p = "../llvm/".$objfile;
 #        $p =~ s/Support\/reg(.*).o/Support\/reg$1.c/;
 #        $p =~ s/.o$/.cpp/;
 #        unless (-e $p) {
 #          die "$p\n"
 #        }
       }
     }
     close DEFS or die "nm failed";
   }
   foreach my $lib (@libs ) {
     my $libpath = $lib;
     $libpath =~ s/^libLLVM(.*)\.a/$1/;
     $libpath =~ s/(.+)CodeGen$/Target\/$1/;
     $libpath =~ s/(.+)AsmPrinter$/Target\/$1\/AsmPrinter/;
     $libpath =~ s/(.+)AsmParser$/Target\/$1\/AsmParser/;
     $libpath =~ s/(.+)Info$/Target\/$1\/TargetInfo/;
     $libpath =~ s/(.+)Disassembler$/Target\/$1\/Disassembler/;
     $libpath =~ s/SelectionDAG/CodeGen\/SelectionDAG/;
     $libpath =~ s/^AsmPrinter/CodeGen\/AsmPrinter/;
     $libpath =~ s/^BitReader/Bitcode\/Reader/;
     $libpath =~ s/^BitWriter/Bitcode\/Writer/;
     $libpath =~ s/^BitstreamReader/Bitstream\/Reader/;
     $libpath =~ s/^BitstreamWriter/Bitstream\/Writer/;
     $libpath =~ s/^MSIL/Target\/MSIL/;
     $libpath =~ s/^Core/VMCore/;
     $libpath =~ s/^Instrumentation/Transforms\/Instrumentation/;
     $libpath =~ s/^Interpreter/ExecutionEngine\/Interpreter/;
     $libpath =~ s/^JIT/ExecutionEngine\/JIT/;
     $libpath =~ s/^ScalarOpts/Transforms\/Scalar/;
     $libpath =~ s/^TransformUtils/Transforms\/Utils/;
     $libpath =~ s/^ipa/Analysis\/IPA/;
     $libpath =~ s/^ipo/Transforms\/IPO/;
     $libpath = "lib/".$libpath."/";
     open UDEFS, "$nmPath -Aup $Directory/$lib|";
     while (<UDEFS>) {
       chomp;
       if (/:([^:]+):/) {
         my $obj = $libpath.$1;
         s/[^ ]+: *U //;
         if (defined($objdefs{$_})) {
           $objdeps{$obj}{$objdefs{$_}}=1;
         }
       }
     }
     close UDEFS or die "nm failed"
   }
 } else {
 # Gather definitions from the libraries
 foreach my $lib (@libs ) {
   open DEFS, "$nmPath -g $Directory/$lib|";
   while (<DEFS>) {
     next if (! / [ABCDGRST] /);
     s/^[^ ]* [ABCDGRST] //;
     s/\015?\012//; # not sure if <DEFS> is in binmode and uses LF or CRLF.
                    # this strips both LF and CRLF.
     $libdefs{$_} = $lib;
   }
   close DEFS or die "nm failed";
 }
 }

 # Gather definitions from the object files.
 foreach my $obj (@objs ) {
   open DEFS, "$nmPath -g $Directory/$obj |";
   while (<DEFS>) {
     next if (! / [ABCDGRST] /);
     s/^[^ ]* [ABCDGRST] //;
     s/\015?\012//; # not sure if <DEFS> is in binmode and uses LF or CRLF.
                    # this strips both LF and CRLF.
     $objdefs{$_} = $obj;
   }
   close DEFS or die "nm failed";
 }

 # Generate one entry in the <dl> list. This generates the <dt> and <dd> elements
 # for one library or object file. The <dt> provides the name of the library or
 # object. The <dd> provides a list of the libraries/objects it depends on.
 sub gen_one_entry {
   my $lib = $_[0];
   my $lib_ns = $lib;
   $lib_ns =~ s/(.*)\.[oa]/$1/;
   if ($FLAT) {
     print "$lib:";
     if ($WHY) { print "\n"; }
   } else {
     print "  <dt><b>$lib</b></dt><dd><ul>\n";
   }
   open UNDEFS,
     "$nmPath -u $Directory/$lib | sed -e 's/^[ 0]* U //' | sort | uniq |";
   my %DepLibs;
   while (<UNDEFS>) {
     chomp;
     my $lib_printed = 0;
     if (defined($libdefs{$_}) && $libdefs{$_} ne $lib) {
       $DepLibs{$libdefs{$_}} = [] unless exists $DepLibs{$libdefs{$_}};
       push(@{$DepLibs{$libdefs{$_}}}, $_);
     } elsif (defined($objdefs{$_}) && $objdefs{$_} ne $lib) {
       if ($PEROBJ && !$PEROBJINCL) {
         # -perobjincl makes .a files depend on .o files they contain themselves
         # default is don't depend on these.
         next if defined $libobjs{$lib}{$objdefs{$_}};
       }
       my $libroot = $lib;
       $libroot =~ s/lib(.*).a/$1/;
       if ($objdefs{$_} ne "$libroot.o") {
         $DepLibs{$objdefs{$_}} = [] unless exists $DepLibs{$objdefs{$_}};
         push(@{$DepLibs{$objdefs{$_}}}, $_);
       }
     }
   }
   close UNDEFS or die "nm failed";
   unless(keys %DepLibs) {
     # above failed
     open UNDEFS, "$nmPath -u $Directory/$lib |";
     while (<UNDEFS>) {
       # to bypass non-working sed
       if ('  ' eq substr($_,0,2) and index($_,'U ')) {
         $_ = substr($_,index($_,'U ')+2)
       };
       $_ = substr($_,index($_,'  *U ')+5) if -1!=index($_,'  *U ');

       chomp;
       my $lib_printed = 0;
       if (defined($libdefs{$_}) && $libdefs{$_} ne $lib) {
         $DepLibs{$libdefs{$_}} = [] unless exists $DepLibs{$libdefs{$_}};
         push(@{$DepLibs{$libdefs{$_}}}, $_);
       } elsif (defined($objdefs{$_}) && $objdefs{$_} ne $lib) {
         my $libroot = $lib;
         $libroot =~ s/lib(.*).a/$1/;
         if ($objdefs{$_} ne "$libroot.o") {
           $DepLibs{$objdefs{$_}} = [] unless exists $DepLibs{$objdefs{$_}};
           push(@{$DepLibs{$objdefs{$_}}}, $_);
         }
       }
     }
     close UNDEFS or die "nm failed";
   }
   if ($PEROBJINCL) {
      # include the .a's objects
      for my $obj (keys %{$libobjs{$lib}}) {
         $DepLibs{$obj} = ["<.a object>"] unless exists $DepLibs{$obj};
      }
      my $madechange = 1;
      while($madechange) {
       $madechange = 0;
       my %temp = %DepLibs;
       foreach my $obj (keys %DepLibs) {
         foreach my $objdeps (keys %{$objdeps{$obj}}) {
           next if defined $temp{$objdeps};
           push(@{$temp{$objdeps}}, $obj);
           $madechange = 1;
         }
       }
       %DepLibs = %temp;
      }
   }

   for my $key (sort keys %DepLibs) {
     if ($FLAT) {
       print " $key";
       if ($WHY) {
         print "\n";
         my @syms = @{$DepLibs{$key}};
         foreach my $sym (@syms) {
           print "  $sym\n";
         }
       }
     } else {
       print "    <li>$key</li>\n";
     }
     my $suffix = substr($key,length($key)-1,1);
     $key =~ s/(.*)\.[oa]/$1/;
     if ($suffix eq "a") {
       if (!$FLAT) { print DOT "$lib_ns -> $key [ weight=0 ];\n" };
     } else {
       if (!$FLAT) { print DOT "$lib_ns -> $key [ weight=10];\n" };
     }
   }
   if ($FLAT) {
     if (!$WHY) {
       print "\n";
     }
   } else {
     print "  </ul></dd>\n";
   }
 }

 # Make sure we flush on write. This is slower but correct based on the way we
 # write I/O in gen_one_entry.
 $| = 1;

 # Print the definition list tag
 if (!$FLAT) {
     print "<dl>\n";

   open DOT, "| $DotPath -Tgif > libdeps.gif";

   print DOT "digraph LibDeps {\n";
   print DOT "  size=\"40,15\"; \n";
   print DOT "  ratio=\"1.33333\"; \n";
   print DOT "  margin=\"0.25\"; \n";
   print DOT "  rankdir=\"LR\"; \n";
   print DOT "  mclimit=\"50.0\"; \n";
   print DOT "  ordering=\"out\"; \n";
   print DOT "  center=\"1\";\n";
   print DOT "node [shape=\"box\",\n";
   print DOT "      color=\"#000088\",\n";
   print DOT "      fillcolor=\"#FFFACD\",\n";
   print DOT "      fontcolor=\"#3355BB\",\n";
   print DOT "      style=\"filled\",\n";
   print DOT "      fontname=\"sans\",\n";
   print DOT "      fontsize=\"24\"\n";
   print DOT "];\n";
   print DOT "edge [dir=\"forward\",style=\"solid\",color=\"#000088\"];\n";
 }

 # Print libraries first
 foreach my $lib (@libs) {
   gen_one_entry($lib);
 }

 if ($PEROBJ) {
   foreach my $obj (keys %objdeps) {
      print "$obj:";
      if (!$PEROBJINCL) {
       foreach my $dep (keys %{$objdeps{$obj}}) {
           print " $dep";
       }
     }
      print "\n";
   }
 }

 if (!$FLAT) {
   print DOT "}\n";
   close DOT;
   open DOT, "| $DotPath -Tgif > objdeps.gif";
   print DOT "digraph ObjDeps {\n";
   print DOT "  size=\"8,10\";\n";
   print DOT "  margin=\"0.25\";\n";
   print DOT "  rankdir=\"LR\";\n";
   print DOT "  mclimit=\"50.0\";\n";
   print DOT "  ordering=\"out\";\n";
   print DOT "  center=\"1\";\n";
   print DOT "node [shape=\"box\",\n";
   print DOT "      color=\"#000088\",\n";
   print DOT "      fillcolor=\"#FFFACD\",\n";
   print DOT "      fontcolor=\"#3355BB\",\n";
   print DOT "      fontname=\"sans\",\n";
   print DOT "      style=\"filled\",\n";
   print DOT "      fontsize=\"24\"\n";
   print DOT "];\n";
   print DOT "edge [dir=\"forward\",style=\"solid\",color=\"#000088\"];\n";
 }

 # Print objects second
 foreach my $obj (@objs) {
   gen_one_entry($obj);
 }

 if (!$FLAT) {
   print DOT "}\n";
   close DOT;

 # Print end tag of definition list element
   print "</dl>\n";
 }
	#!/usr/bin/env perl
	#
	# Program: GenLibDeps.pl
	#
	# Synopsis: Generate HTML output that shows the dependencies between a set of
	# libraries. The output of this script should periodically replace
	# the similar content in the UsingLibraries.html document.
	#
	# Syntax: GenLibDeps.pl [-flat] <directory_with_libraries_in_it> [path_to_nm_binary]
	#
	use strict;
	use warnings;
	# Parse arguments...
	my $FLAT = 0;
	my $WHY = 0;
	my $PEROBJ = 0;
	my $PEROBJINCL = 0;
	while (scalar(@ARGV) and ($_ = $ARGV[0], /^[-+]/)) {
	shift;
	last if /^--$/; # Stop processing arguments on --

	# List command line options here...
	if (/^-flat$/) { $FLAT = 1; next; }
	if (/^-why/) { $WHY = 1; $FLAT = 1; next; }
	if (/^-perobj$/) { $PEROBJ = 1; next; }
	if (/^-perobjincl/) { $PEROBJINCL = 1; next;}
	print "Unknown option: $_ : ignoring!\n";
	}

	# Give first option a name.
	my $Directory = $ARGV[0];
	if (!defined($Directory) \|\| ! -d "$Directory") {
	die "First argument must specify the directory containing LLVM libs\n";
	}

	my $nmPath = $ARGV[1];

	# Find the "dot" program
	my $DotPath="";
	if (!$FLAT) {
	chomp($DotPath = `which dot`);
	die "Can't find 'dot'" if (! -x "$DotPath");
	}

	if (defined($ENV{NM})) {
	chomp($nmPath=$ENV{NM});
	}

	if (!defined($nmPath) \|\| $nmPath eq "") {
	chomp($nmPath=`which nm`);
	die "Can't find 'nm'" if (! -x "$nmPath");
	}

	my $ranlibPath;
	if ($PEROBJ) {
	$ranlibPath = $ARGV[2];
	if (defined($ENV{RANLIB})) {
	chomp($ranlibPath=$ENV{RANLIB});
	}

	if (!defined($ranlibPath) \|\| $ranlibPath eq "") {
	chomp($ranlibPath=`which ranlib`);
	die "Can't find 'ranlib'" if (! -x "$ranlibPath");
	}
	}

	# Open the directory and read its contents, sorting by name and differentiating
	# by whether its a library (.a) or an object file (.o)
	opendir DIR,$Directory;
	my @files = readdir DIR;
	closedir DIR;
	my @libs = grep(/libLLVM.*\.(dylib\|so\|a)$/,sort(@files));
	# Omit the all-of-llvm shared library.
	@libs = grep(!/libLLVM-\d\.\d(svn)?\.(dylib\|so)/, @libs);
	my @objs = grep(/LLVM.*\.o$/,sort(@files));

	# Declare the hashes we will use to keep track of the library and object file
	# symbol definitions.
	my %libdefs;
	my %objdefs;

	my %libobjs;
	my %objdeps=();
	# Gather library definitions at object file granularity (optional)
	if ($PEROBJ) {
	foreach my $lib (@libs ) {
	`$ranlibPath $Directory/$lib`;
	my $libpath = $lib;
	$libpath =~ s/^libLLVM(.*)\.a/$1/;
	$libpath =~ s/(.+)CodeGen$/Target\/$1/;
	$libpath =~ s/(.+)AsmPrinter$/Target\/$1\/AsmPrinter/;
	$libpath =~ s/(.+)AsmParser$/Target\/$1\/AsmParser/;
	$libpath =~ s/(.+)Info$/Target\/$1\/TargetInfo/;
	$libpath =~ s/(.+)Disassembler$/Target\/$1\/Disassembler/;
	$libpath =~ s/SelectionDAG/CodeGen\/SelectionDAG/;
	$libpath =~ s/^AsmPrinter/CodeGen\/AsmPrinter/;
	$libpath =~ s/^BitReader/Bitcode\/Reader/;
	$libpath =~ s/^BitWriter/Bitcode\/Writer/;
	$libpath =~ s/^BitstreamReader/Bitstream\/Reader/;
	$libpath =~ s/^BitstreamWriter/Bitstream\/Writer/;
	$libpath =~ s/^MSIL/Target\/MSIL/;
	$libpath =~ s/^Core/IR/;
	$libpath =~ s/^Instrumentation/Transforms\/Instrumentation/;
	$libpath =~ s/^Interpreter/ExecutionEngine\/Interpreter/;
	$libpath =~ s/^JIT/ExecutionEngine\/JIT/;
	$libpath =~ s/^ScalarOpts/Transforms\/Scalar/;
	$libpath =~ s/^TransformUtils/Transforms\/Utils/;
	$libpath =~ s/^ipa/Analysis\/IPA/;
	$libpath =~ s/^ipo/Transforms\/IPO/;
	$libpath = "lib/".$libpath."/";
	open DEFS, "$nmPath -sg $Directory/$lib\|";
	while (<DEFS>) {
	chomp;
	if (/^([^ ]) in ([^ ])/) {
	my $objfile = $libpath.$2;
	$objdefs{$1} = $objfile;
	$objdeps{$objfile} = {};
	$libobjs{$lib}{$objfile}=1;
	# my $p = "../llvm/".$objfile;
	# $p =~ s/Support\/reg(.*).o/Support\/reg$1.c/;
	# $p =~ s/.o$/.cpp/;
	# unless (-e $p) {
	# die "$p\n"
	# }
	}
	}
	close DEFS or die "nm failed";
	}
	foreach my $lib (@libs ) {
	my $libpath = $lib;
	$libpath =~ s/^libLLVM(.*)\.a/$1/;
	$libpath =~ s/(.+)CodeGen$/Target\/$1/;
	$libpath =~ s/(.+)AsmPrinter$/Target\/$1\/AsmPrinter/;
	$libpath =~ s/(.+)AsmParser$/Target\/$1\/AsmParser/;
	$libpath =~ s/(.+)Info$/Target\/$1\/TargetInfo/;
	$libpath =~ s/(.+)Disassembler$/Target\/$1\/Disassembler/;
	$libpath =~ s/SelectionDAG/CodeGen\/SelectionDAG/;
	$libpath =~ s/^AsmPrinter/CodeGen\/AsmPrinter/;
	$libpath =~ s/^BitReader/Bitcode\/Reader/;
	$libpath =~ s/^BitWriter/Bitcode\/Writer/;
	$libpath =~ s/^BitstreamReader/Bitstream\/Reader/;
	$libpath =~ s/^BitstreamWriter/Bitstream\/Writer/;
	$libpath =~ s/^MSIL/Target\/MSIL/;
	$libpath =~ s/^Core/VMCore/;
	$libpath =~ s/^Instrumentation/Transforms\/Instrumentation/;
	$libpath =~ s/^Interpreter/ExecutionEngine\/Interpreter/;
	$libpath =~ s/^JIT/ExecutionEngine\/JIT/;
	$libpath =~ s/^ScalarOpts/Transforms\/Scalar/;
	$libpath =~ s/^TransformUtils/Transforms\/Utils/;
	$libpath =~ s/^ipa/Analysis\/IPA/;
	$libpath =~ s/^ipo/Transforms\/IPO/;
	$libpath = "lib/".$libpath."/";
	open UDEFS, "$nmPath -Aup $Directory/$lib\|";
	while (<UDEFS>) {
	chomp;
	if (/:([^:]+):/) {
	my $obj = $libpath.$1;
	s/[^ ]+: *U //;
	if (defined($objdefs{$_})) {
	$objdeps{$obj}{$objdefs{$_}}=1;
	}
	}
	}
	close UDEFS or die "nm failed"
	}
	} else {
	# Gather definitions from the libraries
	foreach my $lib (@libs ) {
	open DEFS, "$nmPath -g $Directory/$lib\|";
	while (<DEFS>) {
	next if (! / [ABCDGRST] /);
	s/^[^ ]* [ABCDGRST] //;
	s/\015?\012//; # not sure if <DEFS> is in binmode and uses LF or CRLF.
	# this strips both LF and CRLF.
	$libdefs{$_} = $lib;
	}
	close DEFS or die "nm failed";
	}
	}

	# Gather definitions from the object files.
	foreach my $obj (@objs ) {
	open DEFS, "$nmPath -g $Directory/$obj \|";
	while (<DEFS>) {
	next if (! / [ABCDGRST] /);
	s/^[^ ]* [ABCDGRST] //;
	s/\015?\012//; # not sure if <DEFS> is in binmode and uses LF or CRLF.
	# this strips both LF and CRLF.
	$objdefs{$_} = $obj;
	}
	close DEFS or die "nm failed";
	}

	# Generate one entry in the <dl> list. This generates the <dt> and <dd> elements
	# for one library or object file. The <dt> provides the name of the library or
	# object. The <dd> provides a list of the libraries/objects it depends on.
	sub gen_one_entry {
	my $lib = $_[0];
	my $lib_ns = $lib;
	$lib_ns =~ s/(.*)\.[oa]/$1/;
	if ($FLAT) {
	print "$lib:";
	if ($WHY) { print "\n"; }
	} else {
	print " <dt><b>$lib</b></dt><dd><ul>\n";
	}
	open UNDEFS,
	"$nmPath -u $Directory/$lib \| sed -e 's/^[ 0]* U //' \| sort \| uniq \|";
	my %DepLibs;
	while (<UNDEFS>) {
	chomp;
	my $lib_printed = 0;
	if (defined($libdefs{$_}) && $libdefs{$_} ne $lib) {
	$DepLibs{$libdefs{$_}} = [] unless exists $DepLibs{$libdefs{$_}};
	push(@{$DepLibs{$libdefs{$_}}}, $_);
	} elsif (defined($objdefs{$_}) && $objdefs{$_} ne $lib) {
	if ($PEROBJ && !$PEROBJINCL) {
	# -perobjincl makes .a files depend on .o files they contain themselves
	# default is don't depend on these.
	next if defined $libobjs{$lib}{$objdefs{$_}};
	}
	my $libroot = $lib;
	$libroot =~ s/lib(.*).a/$1/;
	if ($objdefs{$_} ne "$libroot.o") {
	$DepLibs{$objdefs{$_}} = [] unless exists $DepLibs{$objdefs{$_}};
	push(@{$DepLibs{$objdefs{$_}}}, $_);
	}
	}
	}
	close UNDEFS or die "nm failed";
	unless(keys %DepLibs) {
	# above failed
	open UNDEFS, "$nmPath -u $Directory/$lib \|";
	while (<UNDEFS>) {
	# to bypass non-working sed
	if (' ' eq substr($_,0,2) and index($_,'U ')) {
	$_ = substr($_,index($_,'U ')+2)
	};
	$_ = substr($_,index($_,' U ')+5) if -1!=index($_,' U ');

	chomp;
	my $lib_printed = 0;
	if (defined($libdefs{$_}) && $libdefs{$_} ne $lib) {
	$DepLibs{$libdefs{$_}} = [] unless exists $DepLibs{$libdefs{$_}};
	push(@{$DepLibs{$libdefs{$_}}}, $_);
	} elsif (defined($objdefs{$_}) && $objdefs{$_} ne $lib) {
	my $libroot = $lib;
	$libroot =~ s/lib(.*).a/$1/;
	if ($objdefs{$_} ne "$libroot.o") {
	$DepLibs{$objdefs{$_}} = [] unless exists $DepLibs{$objdefs{$_}};
	push(@{$DepLibs{$objdefs{$_}}}, $_);
	}
	}
	}
	close UNDEFS or die "nm failed";
	}
	if ($PEROBJINCL) {
	# include the .a's objects
	for my $obj (keys %{$libobjs{$lib}}) {
	$DepLibs{$obj} = ["<.a object>"] unless exists $DepLibs{$obj};
	}
	my $madechange = 1;
	while($madechange) {
	$madechange = 0;
	my %temp = %DepLibs;
	foreach my $obj (keys %DepLibs) {
	foreach my $objdeps (keys %{$objdeps{$obj}}) {
	next if defined $temp{$objdeps};
	push(@{$temp{$objdeps}}, $obj);
	$madechange = 1;
	}
	}
	%DepLibs = %temp;
	}
	}

	for my $key (sort keys %DepLibs) {
	if ($FLAT) {
	print " $key";
	if ($WHY) {
	print "\n";
	my @syms = @{$DepLibs{$key}};
	foreach my $sym (@syms) {
	print " $sym\n";
	}
	}
	} else {
	print " <li>$key</li>\n";
	}
	my $suffix = substr($key,length($key)-1,1);
	$key =~ s/(.*)\.[oa]/$1/;
	if ($suffix eq "a") {
	if (!$FLAT) { print DOT "$lib_ns -> $key [ weight=0 ];\n" };
	} else {
	if (!$FLAT) { print DOT "$lib_ns -> $key [ weight=10];\n" };
	}
	}
	if ($FLAT) {
	if (!$WHY) {
	print "\n";
	}
	} else {
	print " </ul></dd>\n";
	}
	}

	# Make sure we flush on write. This is slower but correct based on the way we
	# write I/O in gen_one_entry.
	$\| = 1;

	# Print the definition list tag
	if (!$FLAT) {
	print "<dl>\n";

	open DOT, "\| $DotPath -Tgif > libdeps.gif";

	print DOT "digraph LibDeps {\n";
	print DOT " size=\"40,15\"; \n";
	print DOT " ratio=\"1.33333\"; \n";
	print DOT " margin=\"0.25\"; \n";
	print DOT " rankdir=\"LR\"; \n";
	print DOT " mclimit=\"50.0\"; \n";
	print DOT " ordering=\"out\"; \n";
	print DOT " center=\"1\";\n";
	print DOT "node [shape=\"box\",\n";
	print DOT " color=\"#000088\",\n";
	print DOT " fillcolor=\"#FFFACD\",\n";
	print DOT " fontcolor=\"#3355BB\",\n";
	print DOT " style=\"filled\",\n";
	print DOT " fontname=\"sans\",\n";
	print DOT " fontsize=\"24\"\n";
	print DOT "];\n";
	print DOT "edge [dir=\"forward\",style=\"solid\",color=\"#000088\"];\n";
	}

	# Print libraries first
	foreach my $lib (@libs) {
	gen_one_entry($lib);
	}

	if ($PEROBJ) {
	foreach my $obj (keys %objdeps) {
	print "$obj:";
	if (!$PEROBJINCL) {
	foreach my $dep (keys %{$objdeps{$obj}}) {
	print " $dep";
	}
	}
	print "\n";
	}
	}

	if (!$FLAT) {
	print DOT "}\n";
	close DOT;
	open DOT, "\| $DotPath -Tgif > objdeps.gif";
	print DOT "digraph ObjDeps {\n";
	print DOT " size=\"8,10\";\n";
	print DOT " margin=\"0.25\";\n";
	print DOT " rankdir=\"LR\";\n";
	print DOT " mclimit=\"50.0\";\n";
	print DOT " ordering=\"out\";\n";
	print DOT " center=\"1\";\n";
	print DOT "node [shape=\"box\",\n";
	print DOT " color=\"#000088\",\n";
	print DOT " fillcolor=\"#FFFACD\",\n";
	print DOT " fontcolor=\"#3355BB\",\n";
	print DOT " fontname=\"sans\",\n";
	print DOT " style=\"filled\",\n";
	print DOT " fontsize=\"24\"\n";
	print DOT "];\n";
	print DOT "edge [dir=\"forward\",style=\"solid\",color=\"#000088\"];\n";
	}

	# Print objects second
	foreach my $obj (@objs) {
	gen_one_entry($obj);
	}

	if (!$FLAT) {
	print DOT "}\n";
	close DOT;

	# Print end tag of definition list element
	print "</dl>\n";
	}