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|
#!/usr/bin/perl -w
#
# checkcfguse.pl
#
# (1) finds all the Configure/config symbols
#
# (2) greps for their use in the core files and shows which ones.
#
use strict;
use warnings;
my %SYM;
my @PAT =
(
[
# The format is:
# (1) aref of filename glob patterns
# (2) aref of qr patterns, the submatch $1 is the symbol name
[
"config_h.SH",
],
[
qr/^#\$(\w+)\s+(\w+)/,
],
],
[
[
"NetWare/config_H.??",
"Porting/config.sh",
"plan9/config_h.sample",
"win32/config_H.??",
],
qr{^(?:\Q/*\E)?#(?:define|undef)\s+(\w+)},
],
[
[
"configure.com",
],
qr{^(\w+)="(?:define|undef)"},
],
);
{
print STDERR "$0: Looking for symbols...\n";
for my $pat (@PAT) {
for my $fn (map { glob($_) } @{ $pat->[0] }) {
if (open(my $fh, $fn)) {
while (<$fh>) {
for my $p (@$pat) {
for my $sym (/$p/g) {
$SYM{$sym}{$fn}++;
}
}
}
}
}
}
}
printf(STDERR "$0: Found %d symbols\n", scalar keys %SYM);
print STDERR "$0: Looking for their uses...\n";
# Much too noisy grepping.
delete $SYM{'_'};
delete $SYM{'const'};
my $SYM = join("|", sort { length($b) <=> length($a) || $a cmp $b } keys %SYM);
open(my $mani, "MANIFEST") or die "$0: Failed to open MANIFEST\n";
my %found;
while (<$mani>) {
if (/^(\S+)\s+/) {
my $fn = $1;
# Skip matches from the config files themselves,
# from metaconfig generated files that refer to
# the config symbols, and from pods.
next if $fn =~ m{^(?:config_h.SH|Configure|configure\.com|Porting/(?:config|Glossary)|(?:NetWare|plan9|win32)/(?:config|(?:GNU)?[Mm]akefile)|uconfig)|\.pod$};
open my $fh, $fn or die qq[$0: Failed to open $fn: $!];
while (<$fh>) {
while (/\b($SYM)\b/go) {
$found{$1}{$fn}++;
}
}
}
}
for my $sym (sort keys %SYM) {
if (exists $found{$sym}) {
my @found = keys %{$found{$sym}};
print "$sym\t", join(" ", sort @found), "\n";
} else {
print "$sym\n";
}
}
|
