Including my extern-squishing script, which just found an

extraneous extern in exclude.c.

exclude.c

@@ -26,7 +26,6 @@ extern int verbose;
 extern int am_server;
 extern int am_sender;
 extern int eol_nulls;
-extern int recurse;
 extern int io_error;
 extern int local_server;
 extern int prune_empty_dirs;

support/extern-squish

+#!/usr/bin/perl
+# This script finds extraneous "extern" variables in the *.c files.
+# Run it from inside the main rsync directory.
+
+use strict;
+
+my @files = glob('*.c');
+
+foreach my $fn (@files) {
+    open(IN, '<', $fn) or die;
+    undef $/; $_ = <IN>; $/ = "\n";
+    close IN;
+    my @externs = /^extern .*?([^[\s(*;&.]+)(?:\[.*?\])?;/mg;
+    foreach my $find (@externs) {
+	my @matches = /(?<!\sstruct )\b(\Q$find\E)\b/g;
+	print $fn, ': ', $find, "\n" if @matches == 1;
+    }
+}