[PATCH 5/8 v2] gen-perf-test: parallel build support

[Doug Evans]

On Sun, Jul 26, 2015 at 8:39 AM, Doug Evans <xdje42@gmail.com> wrote:
> Hi.
>
> This patch is v2 of this patch:
> https://sourceware.org/ml/gdb-patches/2015-07/msg00589.html
>
> Regression tested for real this time.
> The change is to the leave the default handling as setting
> GDB_PARALLEL to "yes" instead of a subdirectory name,
> and then having one function that computes the path to use,
> and then have everyone call it.
>
> 2015-07-26  Doug Evans  <dje@google.com>
>
>         * Makefile.in (workers/%.worker, build-perf): New rule.
>         (GDB_PERFTEST_MODE): New variable.
>         (check-perf): Use it.
>         (clean): Clean up gdb.perf parallel build subdirs.
>         * lib/build-piece.exp: New file.
>         * lib/gdb.exp (make_gdb_parallel_path): New function
>         (standard_output_file, standard_temp_file): Call it.
>         (GDB_PARALLEL handling): Make outputs,temp,cache directories as subdirs
>         of $GDB_PARALLEL.
>         * lib/cache.exp (gdb_do_cache): Call make_gdb_parallel_path.

Committed.