From: Junio C Hamano <gitster@pobox.com>
Date: Mon, 12 Sep 2016 19:12:26 GMT
Subject: Re: [PATCH] t/perf/run: Don't forget to copy config.mak.autogen & friends to build area
Message-ID: <xmqqh99l2aqt.fsf@gitster.mtv.corp.google.com>
In-Reply-To: <20160910150512.19473-1-kirr@nexedi.com>

Kirill Smelkov <kirr@nexedi.com> writes:

> Otherwise for people who use autotools-based configure in main worktree,
> the performance testing results will be inconsistent as work and build
> trees could be using e.g. different optimization levels.
>
> See e.g.
>
> 	http://public-inbox.org/git/20160818175222.bmm3ivjheokf2qzl@sigill.intra.peff.net/
>
> for example.
>
> NOTE config.status has to be copied because otherwise without it the build
> would want to run reconfigure this way loosing just copied config.mak.autogen.
>
> Signed-off-by: Kirill Smelkov <kirr@nexedi.com>
> ---
>  ( Resending as separate patch-mail, just in case )
>
>  t/perf/run | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/t/perf/run b/t/perf/run
> index cfd7012..aa383c2 100755
> --- a/t/perf/run
> +++ b/t/perf/run
> @@ -30,7 +30,7 @@ unpack_git_rev () {
>  }
>  build_git_rev () {
>  	rev=$1
> -	cp ../../config.mak build/$rev/config.mak
> +	cp -t build/$rev ../../{config.mak,config.mak.autogen,config.status}

That unfortunately is a GNUism -t with a bash-ism {a,b,c}; just keep
it simple and stupid to make sure it is portable.

This is not even a part that we measure the runtime for anyway.

>  	(cd build/$rev && make $GIT_PERF_MAKE_OPTS) ||
>  	die "failed to build revision '$mydir'"
>  }