linux-kernel - Re: [RFC PATCH v2 4/7] libperf: Introduce perf_{evsel, evlist}__open

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Date:   Wed, 30 Mar 2022 15:50:43 +0200
From:   Jiri Olsa <olsajiri@...il.com>
To:     Shunsuke Nakamura <nakamura.shun@...itsu.com>
Cc:     peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
        mark.rutland@....com, alexander.shishkin@...ux.intel.com,
        jolsa@...hat.com, namhyung@...nel.org,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org
Subject: Re: [RFC PATCH v2 4/7] libperf: Introduce perf_{evsel,
 evlist}__open_opt with extensible struct opts

On Fri, Mar 25, 2022 at 01:38:26PM +0900, Shunsuke Nakamura wrote:

SNIP

> diff --git a/tools/lib/perf/evsel.c b/tools/lib/perf/evsel.c
> index b17842581dea..db9b7274feb5 100644
> --- a/tools/lib/perf/evsel.c
> +++ b/tools/lib/perf/evsel.c
> @@ -1,4 +1,7 @@
>  // SPDX-License-Identifier: GPL-2.0
> +#ifndef _GNU_SOURCE
> +#define _GNU_SOURCE
> +#endif

I think we can make this global set in Makefile, like we do in perf

jirka