Compatibility Issues About Python Wrapper for UDBM

[HansBug]

Hi, I'm making python wrapper which supports python3.8-3.12 (and 3.13 in the future) and all-platforms (with as many architectures as possible): https://github.com/HansBug/pyudbm . Now it is WIP, we plan to make pre-compiled wheels for all platforms and all python versions, and publish them to PyPI.

I will record some compatibility issues that been discovered by us. Some of them are in some rarely-used architecture, so it isnt always necessary to support all of them, just some recordings of these issues here. And if you plan to support them, plz let me know.

We will open another issue if some fatal issues like bugs found in udbm, and will submit PRs if possible.

[HansBug]

We are trying to compile UDBM with the custom given UUtils (with -DUUtils_DIR=xxxxx), and we found that linux i686 and armv7l has compile error in UDBM. like this

• Found in i686: https://github.com/HansBug/pyudbm/actions/runs/12176438699/job/33962195299#step:6:639

  /project/UDBM/include/dbm/valuation.h: In instantiation of ‘S dbm::valuation_t<S>::get_delay_to(const dbm::valuation_t<S>&) const [with S = int]’:
  /project/UDBM/src/valuation.cpp:48:20:   required from here
  /project/UDBM/include/dbm/valuation.h:105:26: error: ambiguous overload for ‘operator[]’ (operand types are ‘const dbm::valuation_t<int>’ and ‘int’)
    105 |             S delay = arg[1] - (*this)[1];  // Get delay.
        |                       ~~~^
  /project/UDBM/include/dbm/valuation.h:105:26: note: candidate: ‘operator[](const int*, int)’ <built-in>
  /project/UDBM/include/dbm/valuation.h:146:18: note: candidate: ‘const S& dbm::valuation_t<S>::operator[](size_t) const [with S = int; size_t = unsigned int]’
    146 |         const S& operator[](size_t at) const
        |                  ^~~~~~~~
  /project/UDBM/include/dbm/valuation.h:105:39: error: ambiguous overload for ‘operator[]’ (operand types are ‘const dbm::valuation_t<int>’ and ‘int’)
    105 |             S delay = arg[1] - (*this)[1];  // Get delay.
        |                                ~~~~~~~^
  /project/UDBM/include/dbm/valuation.h:105:39: note: candidate: ‘operator[](const int*, int)’ <built-in>
  /project/UDBM/include/dbm/valuation.h:146:18: note: candidate: ‘const S& dbm::valuation_t<S>::operator[](size_t) const [with S = int; size_t = unsigned int]’
    146 |         const S& operator[](size_t at) const
        |                  ^~~~~~~~
  /project/UDBM/include/dbm/valuation.h: In instantiation of ‘S dbm::valuation_t<S>::get_delay_to(const dbm::valuation_t<S>&) const [with S = double]’:
  /project/UDBM/src/valuation.cpp:49:20:   required from here
  /project/UDBM/include/dbm/valuation.h:105:26: error: ambiguous overload for ‘operator[]’ (operand types are ‘const dbm::valuation_t<double>’ and ‘int’)
    105 |             S delay = arg[1] - (*this)[1];  // Get delay.
        |                       ~~~^
  /project/UDBM/include/dbm/valuation.h:105:26: note: candidate: ‘operator[](const double*, int)’ <built-in>
  /project/UDBM/include/dbm/valuation.h:146:18: note: candidate: ‘const S& dbm::valuation_t<S>::operator[](size_t) const [with S = double; size_t = unsigned int]’
    146 |         const S& operator[](size_t at) const
        |                  ^~~~~~~~
  /project/UDBM/include/dbm/valuation.h:105:39: error: ambiguous overload for ‘operator[]’ (operand types are ‘const dbm::valuation_t<double>’ and ‘int’)
    105 |             S delay = arg[1] - (*this)[1];  // Get delay.
        |                                ~~~~~~~^
  /project/UDBM/include/dbm/valuation.h:105:39: note: candidate: ‘operator[](const double*, int)’ <built-in>
  /project/UDBM/include/dbm/valuation.h:146:18: note: candidate: ‘const S& dbm::valuation_t<S>::operator[](size_t) const [with S = double; size_t = unsigned int]’
    146 |         const S& operator[](size_t at) const
        |                  ^~~~~~~~
  make[2]: *** [src/CMakeFiles/UDBM.dir/build.make:303: src/CMakeFiles/UDBM.dir/valuation.cpp.o] Error 1
  make[1]: *** [CMakeFiles/Makefile2:207: src/CMakeFiles/UDBM.dir/all] Error 2
  make: *** [Makefile:146: all] Error 2

• Found in armv7l: https://github.com/HansBug/pyudbm/actions/runs/12176438699/job/33962196401#step:6:685

It seems these are caused by the same issue.

Now we temporarily drop the support of these 2 archs, will add them back when fixed.