Attempt to find OPTIONS use in a smarter way.

Some ports cleverly define OPTION parameters.  This tries to discover if they
are, in fact, used.

PR:		249970

portlint.pl

@@ -1790,14 +1790,24 @@ sub checkmakefile {
 		}
 		if (!grep(/^$i$/, (@mopt, @popt))) {
 			if ($whole !~ /\n${i}_($m)(_\w+)?(.)?=[^\n]+/ and $whole !~ /\n[-\w]+-${i}-(on|off):\n/) {
-				if (!$slaveport) {
-					&perror("WARN", $file, -1, "$i is listed in ".
-						"OPTIONS_DEFINE, but no PORT_OPTIONS:M$i appears.");
-				} else {
-					&perror("WARN", $file, -1, "$i is listed in ".
-						"OPTIONS_DEFINE, but no PORT_OPTIONS:M$i appears ".
-						"in this slave Makefile.  Make sure it appears in ".
-						"the master's Makefile.");
+				my $found_opt_use = 0;
+				foreach my $oarg ('BUILD_DEPENDS', 'RUN_DEPENDS', 'LIB_DEPENDS') {
+					my $oarg_var = &get_makevar("${i}_${oarg}");
+					if ($oarg_var ne "") {
+						$found_opt_use = 1;
+						last;
+					}
+				}
+				if (!$found_opt_use) {
+					if (!$slaveport) {
+						&perror("WARN", $file, -1, "$i is listed in ".
+							"OPTIONS_DEFINE, but no PORT_OPTIONS:M$i appears.");
+					} else {
+						&perror("WARN", $file, -1, "$i is listed in ".
+							"OPTIONS_DEFINE, but no PORT_OPTIONS:M$i appears ".
+							"in this slave Makefile.  Make sure it appears in ".
+							"the master's Makefile.");
+					}
 				}
 			}
 		}