linux-kernel - Re: [PATCH v4 00/66] Define _GNU

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Date: Thu, 16 May 2024 09:55:03 -0600
From: Shuah Khan <skhan@...uxfoundation.org>
To: Edward Liaw <edliaw@...gle.com>, shuah@...nel.org,
 Mickaël Salaün <mic@...ikod.net>,
 Günther Noack <gnoack@...gle.com>,
 Christian Brauner <brauner@...nel.org>,
 Richard Cochran <richardcochran@...il.com>,
 Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt
 <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
 Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>,
 "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
 Jesper Dangaard Brouer <hawk@...nel.org>,
 John Fastabend <john.fastabend@...il.com>, Mark Brown <broonie@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
 kernel-team@...roid.com, linux-security-module@...r.kernel.org,
 netdev@...r.kernel.org, linux-riscv@...ts.infradead.org,
 bpf@...r.kernel.org, Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH v4 00/66] Define _GNU_SOURCE for sources using

On 5/9/24 18:06, Edward Liaw wrote:
> Centralizes the definition of _GNU_SOURCE into KHDR_INCLUDES and removes
> redefinitions of _GNU_SOURCE from source code.
> 
> 809216233555 ("selftests/harness: remove use of LINE_MAX") introduced
> asprintf into kselftest_harness.h, which is a GNU extension and needs
> _GNU_SOURCE to either be defined prior to including headers or with the
> -D_GNU_SOURCE flag passed to the compiler.
> 
> v1: https://lore.kernel.org/linux-kselftest/20240430235057.1351993-1-edliaw@google.com/
> v2: https://lore.kernel.org/linux-kselftest/20240507214254.2787305-1-edliaw@google.com/
>   - Add -D_GNU_SOURCE to KHDR_INCLUDES so that it is in a single
>     location.
>   - Remove #define _GNU_SOURCE from source code to resolve redefinition
>     warnings.
> v3: https://lore.kernel.org/linux-kselftest/20240509200022.253089-1-edliaw@google.com/
>   - Rebase onto linux-next 20240508.
>   - Split patches by directory.
>   - Add -D_GNU_SOURCE directly to CFLAGS in lib.mk.
>   - Delete additional _GNU_SOURCE definitions from source code in
>     linux-next.
>   - Delete additional -D_GNU_SOURCE flags from Makefiles.
> v4:
>   - Rebase onto linux-next 20240509.
>   - Remove Fixes tag from patches that drop _GNU_SOURCE definition.
>   - Restore space between comment and includes for selftests/damon.
> > Edward Liaw (66):
>    selftests: Compile with -D_GNU_SOURCE when including lib.mk

This above change is causing some build problems - I didn't
notice them when I tested on linux-next. However some problems
are seen by Mark. He sent in a fix for ALSA and a change to
descalate build warn.

Please don't apply these for 6.10 for now. I will take all
of these together.

thanks,
-- Shuah