RFR: JDK-8182733 aarch64 build documentation misleading

[David Holmes]

On 3/08/2018 10:42 AM, Magnus Ihse Bursie wrote:
> 
>> 2 aug. 2018 kl. 17:38 skrev David Holmes <david.holmes at oracle.com>:
>>
>>> On 3/08/2018 8:23 AM, Andrew Haley wrote:
>>>> On 08/02/2018 10:44 PM, Magnus Ihse Bursie wrote:
>>>>
>>>>>> 2 aug. 2018 kl. 14:07 skrev Andrew Haley <aph at redhat.com>:
>>>>>>
>>>>>> On 08/02/2018 07:35 AM, David Holmes wrote:
>>>>>> In theory yes - in practice I don't know if anyone has tried it. How
>>>>>> would you do a native build using the ARM64 sources rather than the
>>>>>> aarch64 sources?
>>>>>
>>>>> It's fine.  I used:
>>>>>
>>>>> sh  ./configure  --with-native-debug-symbols=internal --disable-warnings-as-errors --disable-hotspot-gtest --enable-dtrace=no --with-jtreg=/home/aph/jtreg --with-boot-jdk=/local/jdk10-pristine/build/linux-aarch64-normal-server-release/images/jdk/ --enable-precompiled-headers --with-debug-level=release --with-jvm-features=-aot,-jvmci
>>>>>
>>>>> ... but the important part is to disable aot and jvmci.
>>>>
>>>> I think what David meant was that it's unclear if it's possible to build the ARM64 port natively, i.e. using --with-cpu-port=arm64, instead of the default --with-cpu-port=aarch64.
>>> Sorry, I typo'd the configuration line.
>>> In fact, --with-cpu-port=arm64 doesn't work at all because
>>> /local/jdk-jdk11/src/hotspot/cpu/arm/gc/shared/barrierSetAssembler_arm.cpp:70:30: error: ‘src’ was not declared in this scope
>>>             __ encode_heap_oop(src);
>>> and this fails regardless of cross compilation.  So arm(64) does not matter:
>>> it's obsolete and does not build.
>>
>> Broken by:
>>
>> changeset:   49950:7b916885654d
>> user:        shade
>> date:        Wed May 02 19:26:42 2018 +0200
>> summary:     8201786: Modularize interpreter GC barriers: leftovers for ARM32
>>
>> Bob flagged the port for removal but not sure what the state of that is.
> 
> Maybe it's not worth confounding the build README about the arm64 port, then? That is, just take my doc fix as it is..?

Further adjustments will be needed when/if arm64 is removed.

I'll leave to those who may actually try to follow these instructions to 
decide what is best.

Thanks,
David

> /Magnus
> 
>>
>> David
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