1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
#!/usr/local/bin/perl -w
use strict;
my %ref;
my %def;
my %file;
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;
}
else
{
$ref{$name} = [] unless (exists $ref{$name});
push(@{$ref{$name}},$obj);
push(@refs,$name);
}
}
}
close(NM);
return @refs;
}
warn "Scanning object files\n";
foreach my $obj (<*.o>,<../*.o>)
{
# next if $obj =~ /_f\.o$/;
read_object($obj);
}
warn "Analysing...\n";
if (@ARGV)
{
FILE:
foreach my $file (@ARGV)
{
if (exists $file{$file})
{
foreach my $sym (keys %{$def{$file}})
{
if (exists $ref{$sym})
{
my @files = grep(!/_f\.o$/,@{$ref{$sym}});
if (@files)
{
print "$file defines $sym for ",join(',',@files),"\n";
next FILE;
}
}
}
warn "No good reason for $file!\n";
}
else
{
my %exc;
my @sym = read_object($file);
foreach my $sym (sort @sym)
{
next unless $sym =~ /^[TL]/;
if (exists $ref{$sym})
{
my @files = grep($_ ne $file,grep(!/_f\.o$/,@{$ref{$sym}}));
if (@files)
{
print "$sym needed by ",join(',',@files),"\n";
}
else
{
@files = grep(/_f\.o$/,@{$ref{$sym}});
if (@files)
{
warn "$sym only used in ",join(',',@files),"\n";
if (@files == 1)
{
my $exc = $files[0];
die "Strange $exc" unless $exc =~ s/_f\.o$/.nexc/;
$exc{$exc} = [] unless exists $exc{$exc};
push(@{$exc{$exc}},$sym);
}
}
}
}
}
foreach my $exc (keys %exc)
{
open(EXC,">$exc") || die "Cannot open $exc:$!";
print EXC join("\n",@{$exc{$exc}},'');
close(EXC);
}
}
}
}
|
