[PATCH] Do not build libsanitizer also for powerpc*-*-linux*

[Jakub Jelinek]

On Mon, Jun 02, 2014 at 10:22:11AM +0400, Yury Gribov wrote:
> Looks like now function does not return anything for ARM case? I'd
> say we should replace this pc = ... with return like all other
> cases, the code is just asking for trouble.

But it should be
  return (pc & ~(uptr)1) - 1;
right?

> --- libsanitizer/sanitizer_common/sanitizer_stacktrace.cc	(revision 209878)
> +++ libsanitizer/sanitizer_common/sanitizer_stacktrace.cc	(revision 209879)
> @@ -18,11 +18,13 @@
>   namespace __sanitizer {
> 
>   uptr StackTrace::GetPreviousInstructionPc(uptr pc) {
> -#ifdef __arm__
> +#if defined(__arm__)
>     // Cancel Thumb bit.
>     pc = pc & (~1);
> -#endif
> -#if defined(__sparc__)
> +#elif defined(__powerpc__) || defined(__powerpc64__)
> +  // PCs are always 4 byte aligned.
> +  return pc - 4;
> +#elif defined(__sparc__)
>     return pc - 8;
>   #else
>     return pc - 1;

	Jakub