Hi,

I have a package (pyraf) where I need to switch off some tests for i386
(but not for other 32-bit platforms). I do this by

import platform
is_i386 = platform.machine() in ('i386', 'i486', 'i586', 'i686')

[...]
@pytest.mark.skipif(is_i386, reason='diff is not identical on i386')
def test_gki_single_prow():

https://salsa.debian.org/debian-astro-team/pyraf/-/blob/master/debian/patches/Skip-tests-that-are-too-tight-for-i386.patch

However, on Salsa this fails; and it appears that this test is
ignored. Further investigation gave me that there -- during the regular (pybuild) test -- platform.machine() gives "x86_64", despite of the
32-bit platform.

https://salsa.debian.org/debian-astro-team/pyraf/-/jobs/2130878#L2062

How can one find out the correct machine here?

Best regards

Ole

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On Sat, Oct 30, 2021 at 02:20:40PM +0200, Ole Streicher wrote:

I have a package (pyraf) where I need to switch off some tests for i386
(but not for other 32-bit platforms). I do this by

import platform
is_i386 = platform.machine() in ('i386', 'i486', 'i586', 'i686')

Yup, this is incorrect. This is the same as `uname -m` and so returns the kernel architecture.
If you want to do this purely at the upstream side without checking DEB_HOST_ARCH, AFAIK there is no 100% reliable way to do this.
Please read https://docs.python.org/3/library/platform.html#platform.architecture for further ideas and caveats.


--
WBR, wRAR

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Hi Ole (2021.10.30_12:20:40_+0000)

How can one find out the correct machine here?

sys.implementation._multiarch will return the Debian multiarch tuple
that python was built for.

SR

--
Stefano Rivera
http://tumbleweed.org.za/
+1 415 683 3272

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To: debian-python@lists.debian.org

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Hi Ole,

On 10/30/21 5:50 PM, Ole Streicher wrote:

Hi,
https://salsa.debian.org/debian-astro-team/pyraf/-/jobs/2130878#L2062

How can one find out the correct machine here?

I just committed something to salsa -- sort of a hack, but it works (i386 pipeline passes). I do this
for one of my other package as well. Please consider taking a look.

Nilesh





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Hi Nilesh, Andrey,

Nilesh Patra <nilesh@nileshpatra.info> writes:

On 10/30/21 5:50 PM, Ole Streicher wrote:

Hi,
https://salsa.debian.org/debian-astro-team/pyraf/-/jobs/2130878#L2062
How can one find out the correct machine here?

I just committed something to salsa -- sort of a hack, but it works
(i386 pipeline passes). I do this
for one of my other package as well. Please consider taking a look.

Thank you, but I think I will not use it: This requires dpkg-dev (which
is the package with dpkg-architecture) being installed, which I would
not like to depend on just to have the possibility to test.

I will rather follow Stefanos hint to use sys.implementation._multiarch,
which is however hackish as well, since variables starting with "_"
should not considered as part of the API, and this may break without
warning.

Optimal would be a way to detect whether the internal floating point
processing happens with 80 bit FPU registers (i386) or 64 bit FPU
registers (other systems), since this is the relevant difference here.

Best regards

Ole

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On 10/30/21 8:43 PM, Andrey Rahmatullin wrote:

On Sat, Oct 30, 2021 at 02:20:40PM +0200, Ole Streicher wrote:

I have a package (pyraf) where I need to switch off some tests for i386
(but not for other 32-bit platforms). I do this by

import platform
is_i386 = platform.machine() in ('i386', 'i486', 'i586', 'i686')

Yup, this is incorrect. This is the same as `uname -m` and so returns the kernel architecture.
If you want to do this purely at the upstream side without checking DEB_HOST_ARCH, AFAIK there is no 100% reliable way to do this.

I would also advise to use DEB_HOST_ARCH... Maybe with some fallbacks if
you wish to upstream it?

Cheers,

Thomas Goirand (zigo)

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