[8u] RFR: JDK-8253036: Support building the Zero assembler port on AArch64

[Andrew Haley]

On 18/09/2020 02:58, Andrew Hughes wrote:
 > On 15:04 Thu 17 Sep     , Aleksey Shipilev wrote:
 >> On 9/17/20 1:41 PM, Andrew Haley wrote:
 >>> On 17/09/2020 12:35, Aleksey Shipilev wrote:
 >>>    > On 9/17/20 12:49 PM, Aleksey Shipilev wrote:
 >>>    >> But hey, those definitions are missing even in the head JDK!
 >>>    >
 >>>    > Ha-ha. Oops. I have somewhat of the fix here:
 >>>    >     https://bugs.openjdk.java.net/browse/JDK-8253284
 >>>    >
 >>>    > ...that would have to trickle in separately.
 >>>
 >>> OK. It doesn't seem right to me to enable AArch64/Zero in a update
 >>> version if we know it's incorrect, and quite nastily so. But I don't
 >>> mind if we can make sure that it gets fixed before it gets released.
 >>> GCC has all the atomic builtins we need to get this right; I don't
 >>> believe we need any platform-specific code at all.
 >
 > I don't see this as a blocker to this patch. It is an improvement on
 > AArch64/Zero not building at all,

I disagree. But in practice it doesn't matter because 8253284 is in progress
and will be backported soon.

-- 
Andrew Haley  (he/him)
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
https://keybase.io/andrewhaley
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