Make distcheck as a unit test

MANIFEST

@@ -69,6 +69,7 @@ t/asn.data
 t/asn.t
 t/dnsname.t
 t/logger.t
+t/manifest.t
 t/nameserver-axfr.data
 t/nameserver-axfr.t
 t/nameserver.data

t/manifest.t

@@ -0,0 +1,38 @@
+#!perl
+use v5.14.2;
+use strict;
+use warnings;
+use utf8;
+use Test::More tests => 1;
+
+use File::Basename qw( dirname );
+
+chdir dirname( dirname( __FILE__ ) ) or BAIL_OUT( "chdir: $!" );
+
+my $makebin = 'make';
+if ($^O eq "freebsd") {
+    # This unit test requires GNU Make
+    $makebin = 'gmake';
+};
+
+sub make {
+    my @make_args = @_;
+
+    my $command = join( ' ', $makebin, '--silent', '--no-print-directory', @make_args );
+    my $output = `$command 2>&1`;
+
+    if ( $? == -1 ) {
+        BAIL_OUT( "failed to execute: $!" );
+    }
+    elsif ( $? & 127 ) {
+        BAIL_OUT( "child died with signal %d, %s coredump\n", ( $? & 127 ), ( $? & 128 ) ? 'with' : 'without' );
+    }
+
+    return $output, $? >> 8;
+}
+
+subtest "no fuzzy marks" => sub {
+    my ( $output, $status ) = make "distcheck";
+    is $status, 0,  $makebin . ' distcheck exits with value 0';
+    is $output, "", $makebin . ' distcheck gives empty output';
+};