[Bug target/52495] rs6000.c fails to (cross-) build: "implicit declaration of function ‘ASM_WEAKEN_DECL’"

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52495

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> 2012-08-17 01:13:29 
UTC ---
I also run into this.  The bug is in rs6000.h:

#ifdef HAVE_GAS_WEAK
#define RS6000_WEAK 1
#else
#define RS6000_WEAK 0
#endif

#if RS6000_WEAK
/* Used in lieu of ASM_WEAKEN_LABEL.  */
#define ASM_WEAKEN_DECL(FILE, DECL, NAME, VAL)                          \
  do                                                                    \
    {                                                                   \
      fputs ("\t.weak\t", (FILE));                                      \
      RS6000_OUTPUT_BASENAME ((FILE), (NAME));                          \
      if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL                   \
          && DEFAULT_ABI == ABI_AIX && DOT_SYMBOLS)                     \
        {                                                               \
          if (TARGET_XCOFF)                                 

..


ASM_WEAKEN_DECL is used unconditionally.