Cross compiling openjdk9, problem with HotSpot assembly code

[Alex Kashchenko]

Hi Bruno,

On 03/29/2017 11:14 PM, Bruno Kremel wrote:
>
> Hi Alex,
>
> Just a quick question. Does the toolchain have to be hardfloat?
> Currently I use arm-linux-gnueabi (not hf, it's linaro toolchain).

Softfloat builds are supported with "--with-abi-profile=arm-sflt" or 
"arm-vfp-sflt", I don't know the details, but this thread may be helpful 
- 
http://mail.openjdk.java.net/pipermail/aarch32-port-dev/2016-November/000610.html 



> Thanks
> Bruno
>
> Alex Kashchenko <akashche at redhat.com> writes:
>
>> Hi Bruno,
>>
>> On 03/29/2017 08:42 PM, Bruno Kremel wrote:
>>> Hi All,
>>>
>>> I am trying to compile Openjdk 9 (HG tag changeset 162) and I do
>>> following:
>>> ./configure --with-jvm-interpreter=cpp --with-jvm-variants=zero \
>>>
>>> [...]
>>>
>>> It seems that it tries to compile some x86_64 assembly code which does
>>> not make sense when clearly configure states that I have the ARM target.
>>>
>>> The other thing I don't understand why does it even compile hotspot
>>> code? I have asked for zero interpreter AND openjdk only, I actually
>>> don't want to use HotSpot I intend to use JamVM with OpenJDK classpath.
>>>
>>> Do you have any suggestions.
>>
>> jdk9 build system tries to build a native "build jdk" (to not be
>> confused with "boot jdk") first and then uses it during the cross-build.
>> If you cross compiler has correct prefix (arm-linux-gnueabihf,
>> aarch64-linux-gnu etc) and default compiler is a native one - that
>> should work out of the box. Alternatively you can build native x86_64
>> jdk9 from the same hg revision manually and specify it with
>> "--with-build-jdk" switch.
>>
>> Also AFAIK Zero port is currently not functional in jdk9, though you can
>> build a full ARM32 VM (server/client/minimal) instead using
>> "--openjdk-target=arm-linux-gnueabihf" and
>> "--with-abi-profile=arm-vfp-hflt" switches.
>


-- 
-Alex