https://trac.macports.org/ticket/52358
It is an error to use "defined" with Perl 5.22 and later.
Upstream-Status: Inappropriate [no upstream]
===================================================================
@@ -7,7 +7,7 @@ $usage = "Usage: $0 [-x<file dot-suffix>
-if (!defined(@ARGV)) { die ("$usage"); }
+if (!@ARGV) { die ("$usage"); }
# read in the command line and get some definitions
while ($_=$ARGV[0], /^-/) {
@@ -26,7 +26,7 @@ while ($_=$ARGV[0], /^-/) {
} # while parsing arguments
die ("$0: nothing to do - no substitutions listed!\n");