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|
#!/usr/local/bin/perl -w
use strict;
my %ref;
my %def;
my %file;
my %where;
my %need;
sub read_object
{
my $obj = shift;
open(NM,"nm -p $obj|") || die "Cannot open nm $obj:$!";
$def{$obj} = {};
$file{$obj} = {};
my @refs = ();
while (<NM>)
{
if (/\b([A-Z])\b\s*_?(.*)$/)
{
my ($kind,$name) = ($1,$2);
$file{$obj}{$name} = $kind;
if ($kind ne 'U')
{
$def{$obj}{$name} = $kind;
$where{$name} = [] unless (exists $where{$name});
push(@{$where{$name}},$obj);
}
else
{
$ref{$name} = [] unless (exists $ref{$name});
push(@{$ref{$name}},$obj);
push(@refs,$name);
}
}
}
close(NM);
return $need{$obj} = \@refs;
}
warn "Scanning object files\n";
foreach my $obj (<*.o>,<../*.o>)
{
# next if $obj =~ /_f\.o$/;
read_object($obj);
}
my %inc;
warn "Analysing...\n";
sub process
{
my $file = shift;
$inc{$file} = 1;
if (exists $need{$file})
{
foreach my $sym (@{$need{$file}})
{
if (exists $where{$sym})
{
print "$file need $sym ",join(' ',@{$where{$sym}}),"\n";
if (@{$where{$sym}} > 1)
{
# warn "Multiply defined $sym\n";
}
else
{
my $inc = $where{$sym}->[0];
unless (exists $inc{$inc})
{
process($inc);
}
}
}
}
}
}
foreach my $file (@ARGV)
{
process($file);
}
|
