linux-kernel - Re: [PATCH v4] perf tools: Check libasan and libubsan in Makefile.config

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Date:   Thu, 18 Jun 2020 10:29:56 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Tiezhu Yang <yangtiezhu@...ngson.cn>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-kernel@...r.kernel.org, Xuefeng Li <lixuefeng@...ngson.cn>
Subject: Re: [PATCH v4] perf tools: Check libasan and libubsan in
 Makefile.config

Em Thu, Jun 18, 2020 at 02:57:46PM +0200, Jiri Olsa escreveu:
> On Thu, Jun 18, 2020 at 10:06:01AM +0800, Tiezhu Yang wrote:
> > When build perf with ASan or UBSan, if libasan or libubsan can not find,
> > the feature-glibc is 0 and there exists the following error log which is
> > wrong, because we can find gnu/libc-version.h in /usr/include, glibc-devel
> > is also installed.
> > 
> > [yangtiezhu@...ux perf]$ make DEBUG=1 EXTRA_CFLAGS='-fno-omit-frame-pointer -fsanitize=address'

<SNIP>

> > After install libasan and libubsan, the feature-glibc is 1 and the build
> > process is success, so the cause is related with libasan or libubsan, we
> > should check them and print an error log to reflect the reality.
 
> > Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
> > ---
> > 
> > v2:
> >   - Check libasan and libubsan in tools/build/Makefile.feature
> >   - Modify the patch subject
 
> Acked-by: Jiri Olsa <jolsa@...hat.com>

Applied after changing the subject to:

[PATCH] perf build: Fix error message when asking for -fsanitize=address without required libraries

Will test now.

- Arnaldo