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

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Message-ID: <a3c0a2f9-9948-6ed5-f253-0673dd0e8358@arm.com>
Date:   Wed, 4 Jan 2017 16:08:23 +0000
From:   Sudeep Holla <sudeep.holla@....com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Sudeep Holla <sudeep.holla@....com>, 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 04/01/17 16:06, Jiri Olsa wrote:
> 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? ;-)
> 

Yes, sorry I forgot to remove that and trace it back the actual commit.

-- 
Regards,
Sudeep