Cross compiling openjdk9, problem with HotSpot assembly code

[Alex Kashchenko]

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