linux-kernel - Re: [PATCH v2] tools: perf: fix linker error when libelf config is disabled

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Message-ID: <20170104160654.GA11619@krava>
Date:   Wed, 4 Jan 2017 17:06:54 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Sudeep Holla <sudeep.holla@....com>
Cc:     linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...nel.org>
Subject: Re: [PATCH v2] tools: perf: fix linker error when libelf config is
 disabled

On Wed, Jan 04, 2017 at 03:56:03PM +0000, Sudeep Holla wrote:
> When libelf is disabled in the configuration, we get the following
> linker error:
>   LINK     libperf-jvmti.so
>   ld: cannot find -lelf
>   Makefile.perf:515: recipe for target 'libperf-jvmti.so' failed
> 
> Jiri pointed out that both librt and libelf are not really required. So
> this patch fixes the linker error by getting rid of unwanted libraries
> in the linker stage.
> 
> Fixes: d4dfdf00d43e ("perf jvmti: Plug compilation into perf build")

hum, AFAICS it linked -lelf and -lrt even before right? ;-)

jirka