[oe] [meta-qt5] Exec format error while building webengine 5.9 (rocko branch)

[Carlos Rafael Giani]

I dug deeper in this, and there is something odd going on with the patch 
functionality. This problem is caused by 
recipes-qt/qt5/qtwebengine/0002-chromium-Force-host-toolchain-configuration.patch 
not being applied - but only if I add to SRC_URI another patch in a 
different layer. What is even weirder is that if I modify this patches' 
internal paths instead of adding "patchdir=src/3rdparty/" to the SRC_URI 
line, the problem does not occur.

I tracked it down to a problem in patch_do_patch in 
meta/classes/patch.bbclass. For this patch, the "if not patchdir in 
classes:" check apparently fails. The end result is that quilt push is 
called, but not pop, and somehow, this messes up quilt, so this patch 
isn't applied. I currently do not know why.


On 2017-11-09 08:22, Daniel Mack wrote:
> On Tuesday, October 31, 2017 11:11 AM, Carlos Rafael Giani wrote:
>> I am having problems building the current WebEngine. Initially, it
>> builds some tools. It seems that it does so by using the cross compiler,
>> and not the host one, which could explain the problem I experience:
>>
>>
>> Once GN is built:
>>
>> [321/330] CC base/third_party/superfasthash/superfasthash.o
>> [322/330] CC base/third_party/dynamic_annotations/dynamic_annotations.o
>> [323/330] AR dynamic_annotations.a
>> [324/330] CXX tools/gn/command_clean.o
>> [325/330] CXX tools/gn/loader.o
>> [326/330] CXX tools/gn/gn_main.o
>> [327/330] CXX tools/gn/bundle_data_target_generator.o
>> [328/330] CXX tools/gn/desc_builder.o
>> [329/330] AR gn_lib.a
>> [330/330] LINK gn
>> Building gn manually in a temporary directory for bootstrapping...
>> Building gn using itself to out/Release...
>>
>>
>> I get this error:
>>
>> OSError: [Errno 8] Exec format error
>> Project ERROR: GN build error!
> FWIW, I just ran a build on x86_64 for aarch64 with poky, meta-oe and
> meta-qt5 in their 'rocky' branches, and it worked just fine.
>
>> Running "file" on build/src/3rdparty/chromium/tools/gn/out/Release/gn
>> indeed shows that this was built with the wrong compiler:
>>
>> build/src/3rdparty/chromium/tools/gn/out/Release/gn: ELF 32-bit LSB
>> executable, ARM, EABI5 version 1 (GNU/Linux), dynamically linked
> On my machine:
>
>    build/src/3rdparty/chromium/tools/gn/out/Release/gn: ELF 64-bit LSB
> executable, x86-64, version 1 (GNU/Linux), dynamically linked,
> interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32,
> BuildID[sha1]=aae0a9a51c01e07511994ab36a0a6d4d2a645364, stripped
>
>> So, anybody experienced the same problem?
> I can't tell you what's wrong on your end, but at least it doesn't seem
> to be a general problem.
>
>
> HTH,
> Daniel
>