File: check_syms

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#!/usr/local/bin/perl -w
use File::Find;
use Config;
my @libs;
my $dlext = $Config{'dlext'};

my %ref;
my %def;
my %file;

sub read_object
{
 my $obj = shift;
 open(NM,"nm -p $obj|") || die "Cannot open nm $obj:$!";
 while (<NM>)
  {
   if (/\b([A-Z])\b\s*_?(.*)$/)
    {
     my ($kind,$name) = ($1,$2);
     if ($kind ne 'U')
      {
       $def{$name} = [] unless (exists $def{$name});
       push(@{$def{$name}},$obj);
      }
     else
      {
       $ref{$name} = [] unless (exists $ref{$name});
       push(@{$ref{$name}},$obj);
      }
    }
   if (/\b(f)\b\s*_?(.*)$/)
    {
     my ($kind,$name) = ($1,$2);
     $file{$name} = [] unless (exists $file{$name});
     push(@{$file{$name}},$obj);
    }
  }
 close(NM);
}


find(\&scan,'blib');
sub scan
{
 push(@libs,$File::Find::name) if /\.$dlext$/o;
}

foreach my $lib (@libs)
 {
  read_object($lib);
 }

foreach my $def (sort keys %def)
 {
  my $w = $def{$def};
  if (@$w > 1 && @$w != @libs)
   {
    print $def,' ',join(' ',@$w),"\n";
   }
 }

foreach my $file (sort keys %file)
 {
  my $w = $file{$file};
  if (@$w > 1 && @$w != @libs)
   {
    print $file,' ',join(' ',@$w),"\n";
   }
 }