[zero] zero VM fails to build on arm64 and ppc64el

[Matthias Klose]

On 04.12.18 14:33, Aleksey Shipilev wrote:
> On 12/4/18 2:21 PM, Matthias Klose wrote:
>> jdk-12+22 zero fails to build at least on arm64 and ppc64el (it succeeds on
>> i386, and64, armhf, s390x).  Both builds fail with
>>
>> /usr/bin/ld:
>> /<<PKGBUILDDIR>>/build-zero/hotspot/variant-zero/libjvm/objs/stack_zero.o: in
>> function `ZeroStack::handle_overflow(Thread*)':
>> ./make/hotspot/./src/hotspot/cpu/zero/stack_zero.cpp:75: undefined reference to
>> `JavaThread::thread_state() const'
>> collect2: error: ld returned 1 exit status
>> make[4]: *** [lib/CompileJvm.gmk:179:
>> /<<PKGBUILDDIR>>/build-zero/support/modules_libs/java.base/server/libjvm.so] Error 1
>> make[4]: *** Waiting for unfinished jobs....
>> /usr/bin/ld:
>> /<<PKGBUILDDIR>>/build-zero/hotspot/variant-zero/libjvm/objs/stack_zero.o: in
>> function `ZeroStack::handle_overflow(Thread*)':
>> ./make/hotspot/./src/hotspot/cpu/zero/stack_zero.cpp:75: undefined reference to
>> `JavaThread::thread_state() const'
>> collect2: error: ld returned 1 exit status
>> make[4]: *** [lib/CompileGtest.gmk:60:
>> /<<PKGBUILDDIR>>/build-zero/hotspot/variant-zero/libjvm/gtest/libjvm.so] Error 1
>> make[4]: Leaving directory '/<<PKGBUILDDIR>>/make/hotspot'
>> make[3]: *** [make/Main.gmk:257: hotspot-zero-libs] Error 2
> 
> Okay, this deserves a fix.
> 
> But why build aarch64-zero and ppc64el-zero to begin with? Those platforms are fully supported by
> Red Hat's AArch64 port and SAP's PPC64 port, and are cleanly buildable:
>   https://builds.shipilev.net/openjdk-jdk/
> 
> This must be why it went unnoticed: Zero is usually built for platforms without full-fledged ports.

usually the hotspot platforms are faster to build, and before starting to debug
zero-only platforms it might be easier to build and look at hotspot platforms
where zero still builds.  As I said, I didn't build zero-only platforms yet.