Make assembler comments work on Darwin

[Stan Shebs]

A small patch to get -dA to work on Darwin systems.  Bootstraps etc,
and more importantly you can use -dA now... :-)  Committed to the
mainline.

Stan

2001-10-16  Stan Shebs  <shebs@apple.com>

        * config/rs6000/darwin.h (ASM_COMMENT_START): Define.

Index: config/rs6000/darwin.h
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config/rs6000/darwin.h,v
retrieving revision 1.7
diff -c -3 -p -r1.7 darwin.h
*** darwin.h    2001/10/02 03:36:44     1.7
--- darwin.h    2001/10/16 20:12:28
*************** Boston, MA 02111-1307, USA.  */
*** 128,133 ****
--- 128,138 ----
  #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
    fprintf (FILE, "\t.space %d\n", SIZE)
  
+ /* Override the standard rs6000 definition.  */
+ 
+ #undef ASM_COMMENT_START
+ #define ASM_COMMENT_START ";"
+ 
  /* FP save and restore routines.  */
  #define       SAVE_FP_PREFIX "._savef"
  #define SAVE_FP_SUFFIX ""