Re: Cython came error

[Jean-Noël Grad]

Hi,

Cython>=3.0 is planning to introduce backward-incompatible changes that 
will break the ESPResSo build workflow. More details about these changes 
and our plans to remove Cython from ESPResSo can be found in #4542 
(https://github.com/espressomd/espresso/issues/4542).

The CMake error message was introduced to prevent users from building 
with a Cython version that currently outputs 2010 warnings in the 
terminal, and will fail to generate code in a few months.

Best,
JN

On 10/25/23 10:47, Ivan Cimrak wrote:
> Hi guys,
>
> I just tried to compile current python branch of mdespresso, I got the 
> error that a lower version of cython (below 3.0) is required as I have 
> on the system (macos) – see below.
>
> Then I tried to compile older 4.2 release version and then everything 
> was ok.
>
> Is there any problem with new cython versions above 3.0?
>
> Thanks,
>
> Ivan
>
> icimrak@Ivans-MacBook-Pro espresso-python % cmake ./
>
> -- CMake version: 3.27.4
>
> -- The CXX compiler identification is AppleClang 14.0.3.14030022
>
> -- Detecting CXX compiler ABI info
>
> -- Detecting CXX compiler ABI info - done
>
> -- Check for working CXX compiler: 
> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ - skipped
>
> -- Detecting CXX compile features
>
> -- Detecting CXX compile features - done
>
> -- The C compiler identification is AppleClang 14.0.3.14030022
>
> -- Detecting C compiler ABI info
>
> -- Detecting C compiler ABI info - done
>
> -- Check for working C compiler: 
> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc - skipped
>
> -- Detecting C compile features
>
> -- Detecting C compile features - done
>
> -- Config file: 
> /Users/icimrak/Downloads/espresso-python/src/config/myconfig-default.hpp
>
> -- Performing Test result__PRETTY_FUNCTION__
>
> -- Performing Test result__PRETTY_FUNCTION__ - Success
>
> -- Found Python: /usr/local/bin/python3.11 (found suitable version 
> "3.11.5", minimum required is "3.9") found components: Interpreter 
> Development NumPy Development.Module Development.Embed
>
> CMake Error at 
> /usr/local/Cellar/cmake/3.27.4/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
>
> Could NOT find Cython: Found unsuitable version "3.0.2", required range is
>
> "0.29.21...<3.0" (found /usr/local/bin/cython)
>
> Call Stack (most recent call first):
>
> /usr/local/Cellar/cmake/3.27.4/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:598
>  (_FPHSA_FAILURE_MESSAGE)
>
> cmake/FindCython.cmake:82 (find_package_handle_standard_args)
>
> CMakeLists.txt:250 (find_package)
>
> -- Configuring incomplete, errors occurred!