[RFC][PATCH] * bits/confname.h: Define _CS_POSIX_V7_THREADS_CFLAGS, _CS_POSIX_V7_THREADS_LDFLAGS

[Siddhesh Poyarekar]

On 10/27/20 5:03 AM, Érico Nogueira via Libc-alpha wrote:
> From: Érico Rolim <ericonr@disroot.org>
> 
> I would like to add these enums in order to conform to the POSIX
> specification: https://www.man7.org/linux/man-pages/man0/unistd.h.0p.html
> 
> This change also helps musl-libc, since they want to have these defines
> with the same values as glibc.
> 
> I tried to add them for the bits/confname.h and
> conform/data/unistd.h-data files following the example of the other
> values, but didn't know how to plug them into the confstr / __sysconf
> implementations.

It's been a while since I touched this code, but IIRC you need to add 
your new variables to posix/posix-conf-vars.list.

That said, could you please let me know if you have a copyright 
assignment agreement with the FSF?  I suppose this change may be OK 
given that it is under 20 lines but one of the stewards could confirm 
for sure.

Thanks,
Siddhesh

>   
>   bits/confname.h            | 7 ++++++-
>   conform/data/unistd.h-data | 2 ++
>   2 files changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/bits/confname.h b/bits/confname.h
> index 5dc8215093..fdc5403697 100644
> --- a/bits/confname.h
> +++ b/bits/confname.h
> @@ -670,6 +670,11 @@ enum
>   
>       _CS_V6_ENV,
>   #define _CS_V6_ENV			_CS_V6_ENV
> -    _CS_V7_ENV
> +    _CS_V7_ENV,
>   #define _CS_V7_ENV			_CS_V7_ENV
> +
> +    _CS_POSIX_V7_THREADS_CFLAGS,
> +#define _CS_POSIX_V7_THREADS_CFLAGS _CS_POSIX_V7_THREADS_CFLAGS
> +    _CS_POSIX_V7_THREADS_LDFLAGS
> +#define _CS_POSIX_V7_THREADS_LDFLAGS _CS_POSIX_V7_THREADS_LDFLAGS
>     };
> diff --git a/conform/data/unistd.h-data b/conform/data/unistd.h-data
> index aa070528e8..6c4b52a733 100644
> --- a/conform/data/unistd.h-data
> +++ b/conform/data/unistd.h-data
> @@ -367,6 +367,8 @@ constant _CS_POSIX_V7_LP64_OFF64_LIBS
>   constant _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS
>   constant _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS
>   constant _CS_POSIX_V7_LPBIG_OFFBIG_LIBS
> +constant _CS_POSIX_V7_THREADS_CFLAGS
> +constant _CS_POSIX_V7_THREADS_LDFLAGS
>   constant _CS_POSIX_V7_WIDTH_RESTRICTED_ENVS
>   constant _CS_V7_ENV
>   # endif
>