Re: [PATCH] Makefile: evaluate LDFLAGS_BUILD_ID only once

[Masahiro Yamada]

2017-05-01 1:16 GMT+09:00 Rabin Vincent <rabin@xxxxxx>:
> Evaluate LDFLAGS_BUILD_ID (which involves invoking the compiler) only
> once instead of over and over.
>
> This provides a ~20% reduction in null build time with x86 allnoconfig:
>
> $ make allnoconfig && make -j8
> $ perf stat -r5 -e sched:sched_process_exec make -j8
> -       2 119      sched:sched_process_exec
> +       1 878      sched:sched_process_exec
>
> -       1,238817018 seconds time elapsed
> +       0,971020553 seconds time elapsed
>
> Signed-off-by: Rabin Vincent <rabin@xxxxxx>


Applied to linux-kbuild/kbuild.  Thanks!


-- 
Best Regards
Masahiro Yamada