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

[Mirsad Todorovac <mtodorovac69@gmail.com>]

On 5/10/24 22:52, John Hubbard wrote:
> On 5/10/24 1:37 PM, Mirsad Todorovac wrote:
> ...
>> The fix defines __USE_GNU before including <stdio.h> in case it isn't already
>> defined. After this intervention the module compiles OK.
> 
> Instead of interventions, I believe the standard way to do this is to simply
> define _GNU_SOURCE before including the header file(s). For example, the
> following also fixes the compilation failure on Ubuntu:
> 
> diff --git a/tools/testing/selftests/sgx/main.c b/tools/testing/selftests/sgx/main.c
> index 9820b3809c69..bb6e795d06e2 100644
> --- a/tools/testing/selftests/sgx/main.c
> +++ b/tools/testing/selftests/sgx/main.c
> @@ -1,6 +1,7 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /*  Copyright(c) 2016-20 Intel Corporation. */
>  
> +#define _GNU_SOURCE
>  #include <cpuid.h>
>  #include <elf.h>
>  #include <errno.h>
> 
> 
> However, that's not required, because Edward Liaw is already on v4 of
> a patchset[1] that fixes up the _GNU_SOURCE problem for all selftests.
> 
> [1] https://lore.kernel.org/all/20240510000842.410729-2-edliaw@google.com/
> 
> thanks,

Hi,

Yes, I actually like Ed's solution more, because it solves the asprintf() prototype
problem with TEST_HARNESS_MAIN macro for all of the tests.

Sorry for the noise and the time wasted reviewing. 8-|

Best regards,
Mirsad Todorovac