linux-kernel - Re: [PATCH v1 1/1] selftests/sgx: Fix the implicit declaration of asprintf() compiler error

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Message-Id: <D18H6GHC4VSW.3C39QY6XUDOQR@kernel.org>
Date: Mon, 13 May 2024 14:20:52 +0300
From: "Jarkko Sakkinen" <jarkko@...nel.org>
To: "Mirsad Todorovac" <mtodorovac69@...il.com>
Cc: "John Hubbard" <jhubbard@...dia.com>, <linux-kselftest@...r.kernel.org>,
 "Dave Hansen" <dave.hansen@...ux.intel.com>, "Shuah Khan"
 <shuah@...nel.org>, <linux-sgx@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>, "Edward Liaw" <edliaw@...gle.com>
Subject: Re: [PATCH v1 1/1] selftests/sgx: Fix the implicit declaration of
 asprintf() compiler error

On Mon May 13, 2024 at 12:43 PM EEST, Mirsad Todorovac wrote:
> Thanks for your explanation.
>
> I did not realise that __USE_GNU is evil. :-/

It's not "evil" IMHO. It is not just part of defined API :-)

Thus the official man pages are your friend.

>
> FWIW, there is a sound explanation of the difference between
> _GNU_SOURCE and __USE_GNU
> here: https://stackoverflow.com/questions/7296963/gnu-source-and-use-gnu
>
> Thanks,
> Mirsad

BR, Jarkko