[oe] Query on meta-java layer openjdk-7-jre build

[Otavio Salvador]

Hello Max,

On Tue, Jan 13, 2015 at 11:24 AM, Henning Heinold
<henning at itconsulting-heinold.de> wrote:
> On Tue, Jan 13, 2015 at 01:02:01PM +0000, Max Krummenacher wrote:
>> > I have OpenEmbedded setup and using the daisy branch. For the meta-java
>> layer I
>> > am using the master branch of
>> http://git.yoctoproject.org/cgit/cgit.cgi/meta-java/.
>> >
>> > For our embedded modules we have our own meta layer. I am trying to build
>> > an angstrom image with LXDE.
>> >
>> > We are using ARMv7 hard-float Thumb2 builds (armv7at2hf-vfp). Most errors
>> seems
>> > to be "not declared in this scope" errors. Are there some definitions to
>> be
>> > declared in the conf file, so the build picks it up or is some modification
>> > required to the source with a custome patch declared in the bb file for
>> this?
>> I have run into the same issues.
>>
>> This are follow up errors. The failing qemu-arm runs should have produced
>> header files which provide those definitions.
>>
>> >
>> > Not much knowledge on OpenEmbedded. Also can someone explain the qemu
>> segmentation
>> > fault errors?
>> see above
>>
>> > Trying to build openjdk-7-jre gives me the following error. A complete
>> log file is also attached.
>> >
>> > Can someone give me any pointers on how can I get the build to be
>> successful for
>> > using Java?
>>
>> My investigation showed that qemu-arm can not execute any binary which is
>> compiled with the compiler for Colibri-T20 and is linked with the -static
>> flag.
>> Even a simple hello world program does not work. When executing that hello
>> world on the real hardware I also get a segmentation fault.
>>
>> I got java compiling and running by updating to the latest of meta-java,
>> applying the patch which enables xawt and applying a patch which compiles
>> all binaries without the -static flag. Compiling with dynamic linking
>> however produces a binary which run on qemu-arm and on the target.
>> Currently I have no idea why statically linked binaries fail.
>>
>
> Hi Max,
>
> thanks to investigate this and now it make some sense why qemu is collapsing.
> To notice I switched to static builds long ago
> because the qemu-calls did not worked with the shared compiled executables. Now
> it looks like the other way around. And we maybe should consider to switch back
> to shared library builds.

 Can you prepare a patchset for it?

-- 
Otavio Salvador                             O.S. Systems
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