[glibc] Deleted branch azanella/sparcv8-removal

[glibc] Deleted branch azanella/sparcv8-removal

[Adhemerval Zanella]

The branch 'azanella/sparcv8-removal' was deleted.
It previously pointed to:

 37fa14a... Remove 32 bit sparc v8 support

Diff:

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  37fa14a... Remove 32 bit sparc v8 support

commit 37fa14a55e390b07a758177a3e3baf16b4d35ed4
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Wed Oct 23 10:02:50 2019 -0300

    Remove 32 bit sparc v8 support
    
    The pthread barrier has no support for sparc v8 since glibc 2.23
    (b02840bacdefd) and although there were some discussion to add
    support for LEON chips with CASA instruction [1] discussion has
    stalled since.
    
    If LEON support is still a desirable feature, I would expect to work
    towards:
    
     - Enable USE_ATOMIC_COMPILER_BUILTINS for sparc32.
     - Fix the possible instruction emulation code issue on kernel side
       (as hinted by David Miller), so even a configuration targetting
       LEON would work on sparc v9, although suboptimal.
     - Move the generic *.S implementation to multiarch and add adapt
       the ifunc selectors.
     - Change the required multiarch to use generic implementation for
       non v9 case.
     - For the assembly specific implementation without ifunc support,
       re-evaluate if sparcv9 is really a gain over generic implementation
       with current compiler support.
    
    The patch is straighforward, the sparc v9 is moved as the generic
    implementation, the sparc v8 implementations are removed, and a
    configure check is added to see if compiler sets __sparcv9__.
    
    Checked on a sparcv9-linux-gnu.
    
    [1] https://sourceware.org/ml/libc-alpha/2016-11/msg00027.html