linux-kernel - Re: [PATCH 5/6] perf tools: disable JVMTI if no ELF support available

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Date:   Thu, 13 Apr 2017 12:40:06 +0100
From:   Kim Phillips <kim.phillips@....com>
To:     David Carrillo-Cisneros <davidcc@...gle.com>
Cc:     <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>, Simon Que <sque@...omium.org>,
        Wang Nan <wangnan0@...wei.com>, Jiri Olsa <jolsa@...nel.org>,
        He Kuang <hekuang@...wei.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        "Stephane Eranian" <eranian@...gle.com>,
        Paul Turner <pjt@...gle.com>
Subject: Re: [PATCH 5/6] perf tools: disable JVMTI if no ELF support
 available

On Tue, 11 Apr 2017 23:49:18 -0700
David Carrillo-Cisneros <davidcc@...gle.com> wrote:

> The build of JVMTI depends on LIBELF (-lelf). Make Makefile.conf
> check this dependendancy and notify user when not present.
> 
> Signed-off-by: David Carrillo-Cisneros <davidcc@...gle.com>
> ---

This fixes cross-building perf for arm64 on Ubuntu, as well as native.
Before this patch this error:

  LINK     libperf-jvmti.so
/usr/lib/gcc-cross/aarch64-linux-gnu/6/../../../../aarch64-linux-gnu/bin/ld: cannot find -lelf
collect2: error: ld returned 1 exit status

was avoided with make NO_JVMTI=1.

So for this and the rest of the series, FWIW:

Tested-by: Kim Phillips <kim.phillips@....com>

Thanks,

Kim