[PATCH 1/3] nptl: Move pthread_sigmask implementation to libc

[Florian Weimer]

* Adhemerval Zanella:

> diff --git a/sysdeps/unix/sysv/linux/aarch64/libc.abilist b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
> index a4c31932cb..9e8fe054fc 100644
> --- a/sysdeps/unix/sysv/linux/aarch64/libc.abilist
> +++ b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
> @@ -2145,3 +2145,4 @@ GLIBC_2.30 getdents64 F
>  GLIBC_2.30 gettid F
>  GLIBC_2.30 tgkill F
>  GLIBC_2.30 twalk_r F
> +GLIBC_2.32 pthread_sigmask F
> diff --git a/sysdeps/unix/sysv/linux/aarch64/libpthread.abilist b/sysdeps/unix/sysv/linux/aarch64/libpthread.abilist
> index d65beba958..48b368acb1 100644
> --- a/sysdeps/unix/sysv/linux/aarch64/libpthread.abilist
> +++ b/sysdeps/unix/sysv/linux/aarch64/libpthread.abilist
> @@ -156,7 +156,6 @@ GLIBC_2.17 pthread_setconcurrency F
>  GLIBC_2.17 pthread_setname_np F
>  GLIBC_2.17 pthread_setschedprio F
>  GLIBC_2.17 pthread_setspecific F
> -GLIBC_2.17 pthread_sigmask F
>  GLIBC_2.17 pthread_sigqueue F
>  GLIBC_2.17 pthread_spin_destroy F
>  GLIBC_2.17 pthread_spin_init F

Sorry, this change definitely breaks backwards compatibility.  You
need to add pthread_sigmask to libc as a compat symbol at the base
symbol version.