[Bug lto/60295] [4.9 Regression] Too many lto1-wpa-stream processes are forked

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60295

--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Jan Hubicka from comment #4)

> I think this is better variant
> $ svn diff ~/trunk/gcc/lto/lto.c
> Index: /aux/hubicka/trunk/gcc/lto/lto.c
> ===================================================================
> --- /aux/hubicka/trunk/gcc/lto/lto.c    (revision 207702)
> +++ /aux/hubicka/trunk/gcc/lto/lto.c    (working copy)
> @@ -2491,7 +2491,7 @@ stream_out (char *temp_filename, lto_sym
>  #ifdef HAVE_WORKING_FORK
>    static int nruns;
>  
> -  if (!lto_parallelism || lto_parallelism == 1)
> +  if (lto_parallelism <= 1)
>      {
>        do_stream_out (temp_filename, encoder);
>        return;
> 
> I basically wanted to have simple jobserver client with lto_parallelism=-1,
> but
> I did not have time to implement it.  (after glancing over GNU Make's
> implementation
> it seems actually bit non-trivial)
> 

This works for me.  Can you check it in?