Re: python version confusion with cython (Re: math/py-scipy)

["Dr. Thomas Orgis" <thomas.orgis%uni-hamburg.de@localhost>]

Am Thu, 12 Oct 2023 11:00:19 +0200
schrieb "Dr. Thomas Orgis" <thomas.orgis%uni-hamburg.de@localhost>:

> OK, I am trying to test this and stumble over something along
> 
> https://github.com/scipy/scipy/issues/17808
> 
> I don't have cython or cython3 in my pkgsrc prefix. I do have
> $PREFIX/bin/cython-3.10 (and cythonize-3.10). We have cython handled
> along with all usual python cruft with multiversion support.

I tried to adapt some SUBST_SED that we already have for pythran, but
cython is different, as it appears both as language and compiler name
in meson.build.

How does that build for anyone? Is a cython in /usr/bin found on Linux?
I consistently get something along

===> Building for py310-scipy-1.11.3
* Building wheel...
+ meson setup /data/projekte/pkgsrc/work/math/py-scipy/work/scipy-1.11.3 /data/projekte/pkgsrc/work/math/py-scipy/work/scipy-1.11.3/.mesonpy-ps9ehs0i/build -Dbuildtype=release -Db_ndebug=if-release -Db_vscrt=md -Dblas=openblas_openmp -Dlapack=openblas_openmp --native-file=/data/projekte/pkgsrc/work/math/py-scipy/work/scipy-1.11.3/.mesonpy-ps9ehs0i/build/meson-python-native-file.ini
The Meson build system
Version: 1.1.0
Source dir: /data/projekte/pkgsrc/work/math/py-scipy/work/scipy-1.11.3
Build dir: /data/projekte/pkgsrc/work/math/py-scipy/work/scipy-1.11.3/.mesonpy-ps9ehs0i/build
Build type: native build
Project name: SciPy
Project version: 1.11.3
C compiler for the host machine: cc (gcc 11.4.0 "gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0")
C linker for the host machine: cc ld.bfd 2.38
C++ compiler for the host machine: c++ (gcc 11.4.0 "g++ (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0")
C++ linker for the host machine: c++ ld.bfd 2.38

../../meson.build:1:0: ERROR: Unknown compiler(s): [['cython'], ['cython3']]
The following exception(s) were encountered:
Running `cython -V` gave "[Errno 2] No such file or directory: 'cython'"
Running `cython3 -V` gave "[Errno 2] No such file or directory: 'cython3'"

A full log can be found at /data/projekte/pkgsrc/work/math/py-scipy/work/scipy-1.11.3/.mesonpy-ps9ehs0i/build/meson-logs/meson-log.txt

ERROR Backend subprocess exited when trying to invoke build_wheel
*** Error code 1


Why not everyone?


Alrighty then,

Thomas

-- 
Dr. Thomas Orgis
HPC @ Universität Hamburg