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#!/usr/local/bin/perl -w
# Attempt to scan executable, libraries, and .export files after
# a zsh build to see if all necessary symbols appear in the .export file
# (and hence with `mod_export' in the source file). This keeps AIX happy.
# Probably severely system dependent, but known to run on Fedora Core 1,
# at least. Not needed on AIX itself... you can tell if doesn't link.
if (! -f "zsh") {
die "Can't file zsh, are we in the Src directory of the build?\n";
}
my (%defined, %undefined, %exported);
foreach my $file ("zsh", glob("*.so */*.so")) {
next unless -f $file;
my $exports = $file;
$exports =~ s/\.so//;
$exports .= ".export";
if (-f $exports) {
open EXPORT, $exports or die "Can't read $exports: $!\n";
my $href = $exported{$file} = { };
while (<EXPORT>) {
next if /^#/;
chomp;
$href->{$_} = 1;
}
close EXPORT;
} else {
warn "Hmmm... no .exports file for $file\n";
}
open PIPE, "nm $file |" or die "Can't popen nm";
while (<PIPE>) {
s/^[0-9a-f]*\s+//;
my ($type, $sym) = split;
# ignore local symbols (lower case)
if ($type =~ /^[TBAD]/) {
if (!defined $defined{$sym}) {
$defined{$sym} = $file;
}
} elsif ($type eq 'U') {
# could skip undefined from zsh and zsh.so, but what the heck
my $ref = \$undefined{$sym};
if (defined $$ref) {
push @$$ref, $file;
} else {
$$ref = [ $file ];
}
}
}
close PIPE or die "nm failed";
}
foreach $sym (keys %undefined) {
my $deffile = $defined{$sym};
if (defined $deffile) {
if (!$exported{$deffile}{$sym}) {
printf "%-20s: %-20s: %s\n", $sym, $defined{$sym},
join(" ", @{$undefined{$sym}});
}
}
}
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