Templatize spreadinterp and more cleanups #426

	name: Test python skbuild with CMake

	on: [push, pull_request]

	jobs:
	prepare:
	runs-on: ubuntu-latest
	outputs:
	matrix: ${{ steps.generate_matrix.outputs.matrix }}
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	- name: Generate matrix
	id: generate_matrix
	run: \|
	echo "MACOSX_DEPLOYMENT_TARGET=11.0" >> $GITHUB_ENV
	MATRIX=$(python3 ${{ github.workspace }}/.github/workflows/generate_matrix.py)
	echo "matrix=$MATRIX" >> $GITHUB_OUTPUT
	build:
	name: Build with Pip
	runs-on: ${{ matrix.os }}
	needs: prepare
	strategy:
	fail-fast: false
	matrix: ${{ fromJSON(needs.prepare.outputs.matrix) }}
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	- name: Setup Cpp
	uses: aminya/setup-cpp@v1
	with:
	compiler: ${{ matrix.compiler }}
	vcvarsall: ${{ contains(matrix.os, 'windows') }}
	cmake: false
	ninja: false
	vcpkg: false
	cppcheck: false
	clangtidy: false
	- name: Set min macOS version and install fftw
	if: runner.os == 'macOS'
	run: \|
	brew install fftw
	- name: Install fftw
	if: runner.os == 'linux'
	run: \|
	sudo apt update
	sudo apt install -y libfftw3-dev
	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install pytest
	run: \|
	python3 -m pip install --upgrade pip
	python3 -m pip install pytest
	- name: Set compiler flags
	run: \|
	echo CMAKE_ARGS="-DFINUFFT_ARCH_FLAGS=${{ matrix.arch_flags }}" >> $GITHUB_ENV
	shell: bash
	- name: Build
	run: python3 -m pip install ${{ github.workspace }}/python/finufft --verbose
	- name: Test
	run: python3 -m pytest ${{ github.workspace }}/python/finufft/test

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