undefined symbol error in unwind2-dw2-fde.c

[Mark E.]

Hi guys,
DJGPP (?86-pc-msdosdjgpp) currently doesn't bootstrap from gcc cvs because of 
an undefined symbol error in unwind-dw2-fd2.c when configuring libstdc++ v3. I 
traced the problem this code in unwind-dw2-fd2.c:
 #ifdef ASM_OUTPUT_DEF
/* Note that __USER_LABEL_PREFIX__ is not a string.  Stringize it.  */
#define STR1(X) #X
#define STR(X) STR1(X)
 void *
  __deregister_frame_info (void *)
   __attribute__((alias(STR(__USER_LABEL_PREFIX__)
		        "__deregister_frame_info_bases")));
  #else

This generates the improper assembly (again with DJGPP):
.globl ___deregister_frame_info
	.set	___deregister_frame_info,____deregister_frame_info_bases

The default label output code already handles the user label prefix, so I think 
the use of __USER_LABEL_PREFIX__ above must go away.

Mark