[PATCH v2 2/2] libc/features.h: Make code match documentation
Corinna Vinschen
vinschen@redhat.com
Wed Nov 19 11:15:40 GMT 2025
On Nov 15 00:26, Simon Barth wrote:
> The documentation states that _GNU_SOURCE enables "all of the above
> plus GNU extensions.". Furthermore the documentation states that
> _DEFAULT_SOURCE would enable POSIX-1.2008 with BSD and SVr4 extensions.
>
> The code did different things though:
>
> * For _GNU_SOURCE it only enabled POSIX.1-2008 but it should have been the
> highest available one, POSIX.1-2024.
> * For _DEFAULT_SOURCE it enabled POSIX.1-2024.
>
> Let's use the highest available POSIX standard possible and fix
> documentation where necessary.
> ---
> newlib/libc/include/sys/features.h | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/newlib/libc/include/sys/features.h b/newlib/libc/include/sys/features.h
> index 2a5da45ab..f0f5286ac 100644
> --- a/newlib/libc/include/sys/features.h
> +++ b/newlib/libc/include/sys/features.h
> @@ -105,7 +105,7 @@ extern "C" {
> * _BSD_SOURCE (deprecated by _DEFAULT_SOURCE)
> * _SVID_SOURCE (deprecated by _DEFAULT_SOURCE)
> * _DEFAULT_SOURCE (or none of the above)
> - * POSIX-1.2008 with BSD and SVr4 extensions
> + * POSIX.1-2024 with BSD and SVr4 extensions
> *
> * _FORTIFY_SOURCE = 1, 2 or 3
> * Object Size Checking function wrappers
> @@ -132,7 +132,7 @@ extern "C" {
> #undef _POSIX_SOURCE
> #define _POSIX_SOURCE 1
> #undef _POSIX_C_SOURCE
> -#define _POSIX_C_SOURCE 200809L
> +#define _POSIX_C_SOURCE 202405L
> #undef _XOPEN_SOURCE
> #define _XOPEN_SOURCE 700
> #undef _XOPEN_SOURCE_EXTENDED
> --
> 2.51.2
That was the intention anyway, so this is fine. Pushed.
Thanks,
Corinna
More information about the Newlib
mailing list