AC_LINK_IFELSE(
      AC_LANG_PROGRAM(
         [#include "c-client.h"],
         [
         int main()
         {
         long check = masdfasdfail_expunge_full(NULL, "", 0);
         }
         ]
      ),
      [ac_cv_imap_tk2006="yes"],
      [ac_cv_imap_tk2006="no"]
   )