fix auto detect of sve length #357

	name: Test pip

	on:
	push:
	branches: [ master ]
	paths-ignore: 'doc/**'
	pull_request:
	branches: [ master ]
	paths-ignore: 'doc/**'

	jobs:
	testpip:
	name: "Pip build test + Python examples test"
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-20.04]
	python-version: [3.8]
	steps:
	- uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: Clone w/ submodules
	uses: actions/checkout@v4
	with:
	submodules: recursive
	- name: Update pip and setup venv
	run: python -m pip install --upgrade pip && python -m venv ~/env && . ~/env/bin/activate && echo PATH=$PATH >> $GITHUB_ENV
	- name: Debug info Python
	run: \|
	which python
	python --version
	pip --version
	- name: Build and install Arbor using pip + build flags
	run: CMAKE_ARGS="-DARB_VECTORIZE=ON -DARB_ARCH=native" pip install . --user
	- name: Check that build flags match
	run: \|
	python -c "import arbor; print(arbor.config())" \| grep -q "'arch': 'native'"
	- name: Run Python tests
	run: python -m unittest discover -v -s python
	- name: Run Python examples
	run: scripts/run_python_examples.sh
	- name: Test executables
	run: scripts/test_executables.sh

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