Description

neochine

opened on May 17, 2024

Issue body actions

Feature or enhancement

Proposal:

In this guide
https://devguide.python.org/getting-started/setup-building/#build-dependencies
it suggests lib-mpdec but its not available in debian 12? Perhaps its outdated package?

root@v18606:~/cpython# sudo apt-get install build-essential gdb lcov pkg-config \
      libbz2-dev libffi-dev libgdbm-dev libgdbm-compat-dev liblzma-dev \
      libncurses5-dev libreadline6-dev libsqlite3-dev libssl-dev \
      lzma lzma-dev tk-dev uuid-dev zlib1g-dev libmpdec-dev
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Note, selecting 'libreadline-dev' instead of 'libreadline6-dev'
E: Unable to locate package libmpdec-dev

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Reacted by Erlend E. Aasland

Activity

1. neochine

   added

   type-featureA feature request or enhancementA feature request or enhancement

   on May 17, 2024
2. we-are-all-individuals commented on May 17, 2024

   

   we-are-all-individuals

   on May 17, 2024

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   I encountered the same issue. It looks like mpdecimal has been removed solely because dh-sphinxdoc was not happy with the pre-built HTML docs ...

   https://groups.google.com/g/linux.debian.bugs.dist/c/IhDtdjrk7mE

   The upstream mpdecimal changelog states that the Sphinx documentation is now in a separate package:

   https://www.bytereef.org/mpdecimal/changelog.html

   Debian should not have any reason not to reinstate the package, it should be trivial. I suggest to ask nicely on the Debian mailing lists and mention that mpdecimal will be assumed to be present in the CPython build process in the future.

   Reacted by Erlend E. Aasland and Mike
3. aisk

   added

   type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

   docsDocumentation in the Doc dirDocumentation in the Doc dir

   and removed

   type-featureA feature request or enhancementA feature request or enhancement

   type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

   on May 17, 2024
4. neochine commented on May 17, 2024

   

   neochine

   on May 17, 2024

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   Alright. Given I could build python3.12 even without installing that package, it looks not much necessary. I think issue can be closed
5. aisk commented on May 17, 2024

   

   aisk

   on May 17, 2024

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   The devguide said that mpdecimal is just an optional package for building with optional packages, so it is not required for building Python.

   But I think this is still an issue that needs to be fixed.

   Reacted by Erlend E. Aasland and Mike
6. aisk

   changed the title [-]Libmpec-dev not available[/-] [+]Libmpec-dev not available on debian 12 when building Python[/+] on May 17, 2024
7. devdanzin commented on May 17, 2024

   

   devdanzin

   on May 17, 2024

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   Here's the Debian bug report log for the removal: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1056785

   Reacted by Erlend E. Aasland
8. we-are-all-individuals commented on May 17, 2024

   

   we-are-all-individuals

   on May 17, 2024

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   Here's the Debian bug report log for the removal: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1056785

   Reading that issue, it looks like the Debian developers are not going to respond there. Perhaps opening an issue against the Debian CPython package will get more attention.

   Reacted by Erlend E. Aasland
9. aisk

   added

   buildThe build process and cross-buildThe build process and cross-build

   on May 17, 2024
10. erlend-aasland commented on May 17, 2024

    

    erlend-aasland

    on May 17, 2024

    Contributor

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    Note that it is still possible to use the bundled copy using --without-system-libmpdec (IIRC; I'm on mobile). Perhaps we should mention that in the devguide. I'll open an issue on the devguide tracker. Moreover, opening an issue on the Debian tracker to get the libmpdecimal package reinstated sounds like a good idea; I also commented on their tracker, but I received no reply so far.
11. erlend-aasland

    closed this as not plannedon May 17, 2024
12. erlend-aasland commented on May 20, 2024

    

    erlend-aasland

    on May 20, 2024

    Contributor

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    FTR, a fallback to the bundled version is added in #119196.

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