Fix suitesparse / cvxopt path configuration for Apple Silicon, Alpine Linux #31905
Description
I was able to successfully build Sage on M1 (see #30592) but had two main types of doctest errors.
> However, I did see some of this type as well in the sage/numerical tests:
>
> ImportError: dlopen(/Users/karl.crisman/Downloads/BrewSage/sage-9.4.beta0/local/lib/python3.9/site-packages/cvxopt/cholmod.cpython-39-darwin.so, 2): Symbol not found: _cholmod_l_allocate_dense
> Referenced from: /Users/karl.crisman/Downloads/BrewSage/sage-9.4.beta0/local/lib/python3.9/site-packages/cvxopt/cholmod.cpython-39-darwin.so
> Expected in: flat namespace
> in /Users/karl.crisman/Downloads/BrewSage/sage-9.4.beta0/local/lib/python3.9/site-packages/cvxopt/cholmod.cpython-39-darwin.so
otool -L /Users/karl.crisman/Downloads/BrewSage/sage-9.4.beta0/local/lib/python3.9/site-packages/cvxopt/cholmod.cpython-39-darwin.so
/Users/karl.crisman/Downloads/BrewSage/sage-9.4.beta0/local/lib/python3.9/site-packages/cvxopt/cholmod.cpython-39-darwin.so:
/opt/homebrew/opt/openblas/lib/libopenblas.0.dylib (compatibility version 0.0.0, current version 0.0.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1292.100.5)
This apparently requires a change in the setup.py (see this sage-devel discussion):
if sys.platform.startswith("darwin"):
SUITESPARSE_LIB_DIR = '/usr/local/lib'
SUITESPARSE_INC_DIR = '/usr/local/include'
to allow /opt/homebrew.
Upstream: Reported upstream. No feedback yet.
CC: @dimpase @mkoeppe @orlitzky @kiwifb
Component: porting
Issue created by migration from https://trac.sagemath.org/ticket/31905