* Status of glibc on pre-v9 SPARC
@ 2017-12-15 17:20 Joseph Myers
2017-12-15 17:45 ` David Miller
0 siblings, 1 reply; 2+ messages in thread
From: Joseph Myers @ 2017-12-15 17:20 UTC (permalink / raw)
To: davem, libc-alpha
Since at least
commit b02840bacdefde318d2ad2f920e50785b9b25d69
Author: Torvald Riegel <triegel@redhat.com>
AuthorDate: Wed Jun 24 14:37:32 2015 +0200
Commit: Torvald Riegel <triegel@redhat.com>
CommitDate: Fri Jan 15 21:20:34 2016 +0100
New pthread_barrier algorithm to fulfill barrier destruction requirements.
building glibc for pre-v9 32-bit SPARC has been broken because
sysdeps/sparc/sparc32/pthread_barrier_wait.c just contains a #error.
Is this something that is still intended to be fixed? Or should pre-v9
32-bit SPARC be considered like the original i386, i.e. too little atomic
operation support so should no longer be supported with v9 being made the
official minimum supported by glibc?
--
Joseph S. Myers
joseph@codesourcery.com
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Status of glibc on pre-v9 SPARC
2017-12-15 17:20 Status of glibc on pre-v9 SPARC Joseph Myers
@ 2017-12-15 17:45 ` David Miller
0 siblings, 0 replies; 2+ messages in thread
From: David Miller @ 2017-12-15 17:45 UTC (permalink / raw)
To: joseph; +Cc: libc-alpha
From: Joseph Myers <joseph@codesourcery.com>
Date: Fri, 15 Dec 2017 17:20:34 +0000
> Is this something that is still intended to be fixed? Or should pre-v9
> 32-bit SPARC be considered like the original i386, i.e. too little atomic
> operation support so should no longer be supported with v9 being made the
> official minimum supported by glibc?
I would really like to fix it and began work on a kernel call that would
allow emulating CAS when the cpu lacks the instruction.
Also, LEON cpus have CAS in hardware and are pre-v9.
I can try to get on top of this work again, but no promises.
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