Dollars in identifiers are illegal in C.

12:44 < kyllikki> lennert: if you need to argue with someone 
                  http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1124.pdf 
                  page 63 is fairly clear


--- authd-1.4.3/authd.c.arm	2007-05-05 12:14:43.000000000 +0200
+++ authd-1.4.3/authd.c	2007-05-05 12:17:09.000000000 +0200
@@ -203,7 +203,7 @@
 }
 
 static void create_opt(int argc, char *argv[]) {
-    enum { $_LONGOPT = UCHAR_MAX,       // no short opt value overlap
+    enum { PRE_FIRST_LONGOPT = UCHAR_MAX,       // no short opt value overlap
         CODESET_LONGOPT, IDENT_LONGOPT, FN_LONGOPT, LANG_LONGOPT,
         MAPPED_LONGOPT, OS_LONGOPT, PASSWD_LONGOPT, USERNAME_LONGOPT
     };