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Date: Wed, 8 May 2024 21:05:55 +0900
From: Mark Brown <broonie@kernel.org>
To: Edward Liaw <edliaw@google.com>
Cc: shuah@kernel.org, Jaroslav Kysela <perex@perex.cz>,
	Takashi Iwai <tiwai@suse.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
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	=?iso-8859-1?Q?Micka=EBl_Sala=FCn?= <mic@digikod.net>,
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Subject: Re: [PATCH v2 1/5] selftests: Compile kselftest headers with
 -D_GNU_SOURCE
Message-ID: <Zjtqo6EFyGmSeREQ@finisterre.sirena.org.uk>
Mail-Followup-To: Edward Liaw <edliaw@google.com>, shuah@kernel.org,
	Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, Nhat Pham <nphamcs@gmail.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Christian Brauner <brauner@kernel.org>,
	Eric Biederman <ebiederm@xmission.com>,
	Kees Cook <keescook@chromium.org>,
	OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Darren Hart <dvhart@infradead.org>,
	Davidlohr Bueso <dave@stgolabs.net>,
	=?iso-8859-1?Q?Andr=E9?= Almeida <andrealmeid@igalia.com>,
	Jiri Kosina <jikos@kernel.org>,
	Benjamin Tissoires <bentiss@kernel.org>,
	Jason Gunthorpe <jgg@ziepe.ca>, Kevin Tian <kevin.tian@intel.com>,
	Andy Lutomirski <luto@amacapital.net>,
	Will Drewry <wad@chromium.org>, Marc Zyngier <maz@kernel.org>,
	Oliver Upton <oliver.upton@linux.dev>,
	James Morse <james.morse@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Zenghui Yu <yuzenghui@huawei.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Sean Christopherson <seanjc@google.com>,
	Anup Patel <anup@brainfault.org>,
	Atish Patra <atishp@atishpatra.org>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Christian Borntraeger <borntraeger@linux.ibm.com>,
	Janosch Frank <frankja@linux.ibm.com>,
	Claudio Imbrenda <imbrenda@linux.ibm.com>,
	David Hildenbrand <david@redhat.com>,
	=?iso-8859-1?Q?Micka=EBl_Sala=FCn?= <mic@digikod.net>,
	Paul Moore <paul@paul-moore.com>, James Morris <jmorris@namei.org>,
	"Serge E. Hallyn" <serge@hallyn.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Seth Forshee <sforshee@kernel.org>,
	Bongsu Jeon <bongsu.jeon@samsung.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Steffen Klassert <steffen.klassert@secunet.com>,
	Herbert Xu <herbert@gondor.apana.org.au>,
	Andreas =?iso-8859-1?Q?F=E4rber?= <afaerber@suse.de>,
	Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
	Matthieu Baerts <matttbe@kernel.org>,
	Mat Martineau <martineau@kernel.org>,
	Geliang Tang <geliang@kernel.org>,
	Willem de Bruijn <willemdebruijn.kernel@gmail.com>,
	Fenghua Yu <fenghua.yu@intel.com>,
	Reinette Chatre <reinette.chatre@intel.com>,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	"Paul E. McKenney" <paulmck@kernel.org>,
	Boqun Feng <boqun.feng@gmail.com>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Jarkko Sakkinen <jarkko@kernel.org>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Muhammad Usama Anjum <usama.anjum@collabora.com>,
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References: <20240507214254.2787305-1-edliaw@google.com>
 <20240507214254.2787305-2-edliaw@google.com>
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On Tue, May 07, 2024 at 09:38:26PM +0000, Edward Liaw wrote:
> Add the -D_GNU_SOURCE flag to KHDR_INCLUDES so that it is defined in a
> central location.
>=20
> 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.

Reviewed-by: Mark Brown <broonie@kernel.org>

This does mean we define _GNU_SOURCE for nolibc (and I guess any other
libc people use like bionic) but hopefully nobody's using the same
define with a different meaning so should be fine.

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