root/maint/unrefglobals.pl

/*   */

#!/usr/bin/perl
 
# Copyright (c) 2003, Pavel Roskin
# The Midnight Commander is free software: you can redistribute it
# and/or modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation, either version 3 of the License,
# or (at your option) any later version.
#
# The Midnight Commander is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
# Run this script on the map with cross-reference generated by GNU ld,
# and it will generate a list of symbols that don't need to be global.
# To create the map, run something like this:
# make LDFLAGS=-Wl,-Map,output.map,--cref
 
use strict;
 
my %symbols;
my %syms;
my %objs;
 
if ($#ARGV != 0) {
        print "Usage: unrefglobals.pl mapfile\n";
        exit 1;
}
 
if (!open (MAP, "$ARGV[0]")) {
        print "Cannot open file \"$ARGV[0]\"\n";
        exit 1;
}
 
my $line;
my $next_line = <MAP>;
while (1) {
        last unless $next_line;
        $line = $next_line;
        $next_line = <MAP>;
        next unless ($line =~ m{^[A-Za-z_][A-Za-z0-9_]*  +[^ /][^ ]+\.o$} or
                     $line =~ m{^[A-Za-z_][A-Za-z0-9_]*  +[^ /][^ ]+\.a\([^ ]+\.o\)$});
        if (!$next_line or ($next_line !~ /^ /)) {
                my @arr = split (' ', $line);
                $symbols{$arr[0]} = $arr[1];
                $syms{$arr[0]} = 1;
                $objs{$arr[1]} = 1;
        }
}
 
close(MAP);
 
foreach my $obj (sort keys %objs) {
        print "$obj\n";
        foreach my $sym (sort keys %syms) {
                print "\t$sym\n" if ($symbols{$sym} eq $obj);
        }
}

/*   */