[Buildroot] [PATCH v2 3/3] python-cffi: add host variant

Yegor Yefremov yegorslists at googlemail.com
Tue Jan 5 15:45:35 UTC 2016


On Tue, Jan 5, 2016 at 4:40 PM, Yegor Yefremov
<yegorslists at googlemail.com> wrote:
> Hello Thomas, Yann,
>
> On Tue, Jan 5, 2016 at 8:17 AM,  <yegorslists at googlemail.com> wrote:
>> From: Yegor Yefremov <yegorslists at googlemail.com>
>>
>> Host variant is needed to cross-compile CFFI based C library wrappers.
>>
>> Signed-off-by: Yegor Yefremov <yegorslists at googlemail.com>
>> ---
>> Changes:
>>         v2: add host-libffi dependency
>>
>>  package/python-cffi/python-cffi.mk | 2 ++
>>  1 file changed, 2 insertions(+)
>>
>> diff --git a/package/python-cffi/python-cffi.mk b/package/python-cffi/python-cffi.mk
>> index 70fbe02..02c969b 100644
>> --- a/package/python-cffi/python-cffi.mk
>> +++ b/package/python-cffi/python-cffi.mk
>> @@ -11,5 +11,7 @@ PYTHON_CFFI_SETUP_TYPE = setuptools
>>  PYTHON_CFFI_DEPENDENCIES = host-pkgconf libffi
>>  PYTHON_CFFI_LICENSE = MIT
>>  PYTHON_CFFI_LICENSE_FILES = LICENSE
>> +HOST_PYTHON_CFFI_DEPENDENCIES = host-python-pycparser host-libffi
>>
>>  $(eval $(python-package))
>> +$(eval $(host-python-package))
>> --
>
> I have now following theory regarding checking dependencies in target
> and host variant.
>
> If you look at python-tornado's setup.py file [1], you see, that they
> say, install_requires will be checked only for setuptools. This is
> also the case for host-python-cffi. The target variant will be
> installed with --single-version-externally-managed option, that
> performs "old-style" install [2] [3], i.e. without checking
> install_requires.
>
> That's my understanding for now.
>
> [1] https://github.com/tornadoweb/tornado/blob/master/setup.py#L126
> [2] https://pythonhosted.org/setuptools/setuptools.html
> [3] https://bitbucket.org/pypa/setuptools/src/e517fced669d54bcaf3da2d8ca468d29120fedfc/setuptools/command/install.py?at=default&fileviewer=file-view-default#install.py-58

This SO answer also points to this conclusion:
http://stackoverflow.com/a/22179371/1113139

Yegor


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