Support for s390x

[sandeepb2013]

Hi,

i'm trying to install python-docTR on S390x, but dependency pypdfium2 build failed.
i'm tring to install pypdfium2 from pip getting the following error .

`pip install pypdfium2
Collecting pypdfium2
Downloading pypdfium2-4.30.0.tar.gz (140 kB)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 140.2/140.2 kB 3.8 MB/s eta 0:00:00
Installing build dependencies ... done
Getting requirements to build wheel ... error
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> [18 lines of output]
Traceback (most recent call last):
File "/usr/local/lib/python3.10/dist-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in
main()
File "/usr/local/lib/python3.10/dist-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
json_out['return_val'] = hook(**hook_input['kwargs'])
File "/usr/local/lib/python3.10/dist-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 118, in get_requires_for_build_wheel
return hook(config_settings)
File "/tmp/pip-build-env-iw42b6xf/overlay/local/lib/python3.10/dist-packages/setuptools/build_meta.py", line 325, in get_requires_for_build_wheel
return self._get_build_requires(config_settings, requirements=['wheel'])
File "/tmp/pip-build-env-iw42b6xf/overlay/local/lib/python3.10/dist-packages/setuptools/build_meta.py", line 295, in _get_build_requires
self.run_setup()
File "/tmp/pip-build-env-iw42b6xf/overlay/local/lib/python3.10/dist-packages/setuptools/build_meta.py", line 311, in run_setup
exec(code, locals())
File "", line 161, in
File "", line 152, in main
File "/tmp/pip-install-96eku2nd/pypdfium2_5345d99864474a78ac39d1b0c222be99/setupsrc/pypdfium2_setup/packaging_base.py", line 610, in parse_pl_spec
raise RuntimeError(f"No pre-built binaries available for {Host}. You may place custom binaries & bindings in data/sourcebuild and install with {PlatSpec_EnvVar}=sourcebuild.")
RuntimeError: No pre-built binaries available for <Host: linux s390x, glibc 2.35>. You may place custom binaries & bindings in data/sourcebuild and install with PDFIUM_PLATFORM=sourcebuild.
[end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.`

[bblanchon]

Chromium contains many references to s390x, so I suppose it supports this architecture.
However, I don't think PDFium supports it.
I tried to build with target_cpu = "s390x" but ended up with an x86-64 library.

@sandeepb2013, if you do need this, I suggest you get in touch with the PDFium development team and ask them how you can cross-build from x86 to s390x.
Once you find the solution, I'll be happy to integrate it into the weekly build.

[sandeepb2013]

Thanks @bblanchon
raised concern regarding the same with PDFium community.
[https://github.com/pypdfium2-team/pypdfium2/issues/313]

let me know if i can do anything from my end to move forward.
Thanks.

[mara004]

@sandeepb2013 Sorry for the late reply, I missed this thread.

raised concern regarding the same with PDFium community.
[https://github.com/pypdfium2-team/pypdfium2/issues/313]

I think you may have mixed up pypdfium2 and pdfium here. You can reach out to pdfium at its mailing list: https://groups.google.com/g/pdfium
or maybe the bug tracker: https://issues.chromium.org/issues?q=componentid:1586257%2B

---

In the meantime, you could consider the libreoffice trick: pypdfium2-team/pypdfium2#313 (comment)

[sandeepb2013]

@mara004 sorry for the late response, thanks for your reference i'll be looking into the pdfium team. i''l keep you posted the updates.