C multiline macro confuses parser

This is an excerpt from a larger gdb debugger source file.  A multiline 
C macro condition gets the parser confused.  cedet/semantic.el says it 
is version 2.2.  (My emacs lisp debugging skills are quite rusty.)

Given:

// BEGIN C source
// OK uncomment this singleline version and comment out multiline version
// #if !(defined(PT_TEXT_ADDR) || defined(PT_DATA_ADDR) || 
defined(PT_TEXT_END_ADDR))
// !OK multiline version
#if !(defined(PT_TEXT_ADDR)        \
       || defined(PT_DATA_ADDR)    \
       || defined(PT_TEXT_END_ADDR))
#if defined(__mcoldfire__)
#define PT_TEXT_ADDR 49*4
#elif defined(BFIN)
#define PT_TEXT_ADDR 220
#elif defined(__TMS320C6X__)
#define PT_TEXT_ADDR     (0x10000*4)
#endif
#endif
ptid_t
ptid_of_lwp (struct lwp_info *lwp)
{
   return ptid_of (get_lwp_thread (lwp));
}
void
lwp_set_arch_private_info (struct lwp_info *lwp,
                struct arch_lwp_info *info)
{
   lwp->arch_private = info;
}
// END C source

ESC-X bovinate for the multiline version yields:
(("ptid_of" function
   (:prototype-flag t :arguments
            (("" variable
              (:type
               ("get_lwp_thread" type
                (:type "class")
                nil nil))
              (reparse-symbol arg-sub-list)
              #<overlay from 495 to 515 in linux-low-semantic.c>))
            :type "int")
   nil #<overlay from 486 to 517 in linux-low-semantic.c>)
  ("arch_private" variable
   (:default-value "info" :type "int")
   nil #<overlay from 617 to 637 in linux-low-semantic.c>))

ESC-X bovinate for the singleline version yields:
(("ptid_of_lwp" function
   (:arguments
    (("lwp" variable
      (:pointer 1 :type
            ("lwp_info" type
         (:prototype t :type "struct")
         nil nil))
      (reparse-symbol arg-sub-list)
      #<overlay from 458 to 479 in linux-low-semantic.c>))
    :type
    ("ptid_t" type
     (:type "class")
     nil nil))
   (unlink-hook
    (semantic--tag-unlink-secondary-overlays)
    secondary-overlays
    (#<overlay from 438 to 445 in linux-low-semantic.c>)
    link-hook
    (semantic--tag-link-secondary-overlays)
    unlink-copy-hook
    (semantic--tag-unlink-copy-secondary-overlays))
   #<overlay from 438 to 524 in linux-low-semantic.c>)
  ("lwp_set_arch_private_info" function
...
   #<overlay from 525 to 644 in linux-low-semantic.c>))

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