Use our own version of getopt_long() if the OS doesn't have one.

src/include/getopt_long.h

@@ -0,0 +1,33 @@
+/*
+ * Portions Copyright (c) 1987, 1993, 1994
+ * The Regents of the University of California.  All rights reserved.
+ *
+ * Portions Copyright (c) 2003
+ * PostgreSQL Global Development Group
+ *
+ * $Header: /cvsroot/pgsql/src/include/getopt_long.h,v 1.1 2003/01/06 18:53:25 petere Exp $
+ */
+
+/* These are picked up from the system's getopt() facility. */
+extern int opterr;
+extern int optind;
+extern int optopt;
+extern char *optarg;
+
+/* Some systems have this, otherwise you need to define it somewhere. */
+extern int optreset;
+
+struct option {
+	const char *name;
+	int has_arg;
+	int *flag;
+	int val;
+};
+
+#define no_argument 0
+#define required_argument 1
+
+int
+getopt_long(int argc, char * const argv[],
+			const char *optstring,
+			const struct option *longopts, int *longindex);