On Sun, Jan 26, 2025 at 01:33:24PM -0600, Marc Culler wrote:
> OK.  But clearly it is a bug that the CoxeterGroup package raises:
>   RuntimeError: coxeter3 must be installed
> when coxeter3 *is* installed but sagemath_coxeter3 is not installed.

naming conventions...
Python package coxeter3 is installed by installing sagemath_coxeter3

Same issues with meataxe vs sagemath_meataxe, etc.

Indeed, it could be giving clearer advice on what to install on errors.

> 
> - Marc
> 
> On Sun, Jan 26, 2025 at 1:28 PM <dimp...@gmail.com> wrote:
> 
> > On Sun, Jan 26, 2025 at 11:03:42AM -0800, Marc Culler wrote:
> > > Yes, I have a log file for coxeter3 which built fine.
> > >
> > > The problem turned out to be that I had to use BOTH ---enable-coxeter3
> > AND
> > > -enable-sagemath_coxeter3.  With the latter option, the .so file gets
> > build
> > > and installed as expected.
> > >
> > > Why?  What is this about?  And why does the traceback tell our user to
> > > install the coxeter3 package when the coxeter3 package is installed
> > already
> > > and what is really needed is the sagemath_coxeter3 package?
> >
> > coxeter3 is just a C++ library.
> > ---- (cf. its SPKG.rst)
> > This package wraps Fokko Ducloux's Coxeter 3 C++ library
> > ----
> >
> >
> > sagemath_coxeter3 is a Python inteface to it,
> > ---- (cf. its SPKG.rst)
> > It provides a Cython interface to the ``coxeter3`` library.
> > ----
> > so that's akin to fplll vs fpylll, only optional, so they aren't
> > installed by default. And yes, it's not an error to only install
> > coxeter3.
> >
> > HTH
> > Dima
> >
> > >
> > > - Marc
> > > On Sunday, January 26, 2025 at 12:49:02 PM UTC-6 dim...@gmail.com wrote:
> > >
> > > > On Sun, Jan 26, 2025 at 11:51 AM Marc Culler <marc....@gmail.com>
> > wrote:
> > > > >
> > > > > In the venv of my recently built SageMath-10.6beta4 I find:
> > > > > % ls lib/python3.12/site-packages/sage/libs/coxeter3
> > > > > __init__.py coxeter.pxd decl.pxd __pycache__ coxeter.pyx
> > > > > all__sagemath_coxeter3.py coxeter_group.py
> > > > >
> > > > > In other subdirectories of sage/libs, such as flint, one finds that
> > > > every .pyx file has an associated .so file in the same subdirectory.
> > So I
> > > > would expect to find
> > > >
> > lib/python3.12/site-packages/sage/libs/coxeter3/coxeter-cpython-312-darwin.so,
> >
> > > > but it is not there.
> > > > > That seems to suggest that coxeter.pyx is not being compiled by
> > cython,
> > > > and therefore that the extension module sage.libs.coxeter3.coxeter is
> > not
> > > > being built and hence is not installed.
> > > > >
> > > > > So it looks to me like the sagelib build process is skipping the
> > step of
> > > > cythonizing and compiling cython extension modules that are part of an
> > > > optional package.
> > > > >
> > > > > Am I missing some step which is needed for this to happen? I have
> > used
> > > > the --enable-coxeter3 flag in the configure command. Do I need to do
> > > > something else?
> > > >
> > > > do you have anything in logs/pkgs/coxeter* ?
> > > > If not, and if you use the standard make build (not meson-based one)
> > you
> > > > may try
> > > >
> > > > make coxeter3
> > > >
> > > > and see how it goes.
> > > >
> > > > Dima
> > > >
> > > > >
> > > > > - Marc
> > > > >
> > > > >
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