Added cmdline argument for xelab options #16

	name: CI

	on: [push, pull_request]

	env:
	VERILATOR_VERSION: v5.012

	jobs:
	build:
	runs-on: ubuntu-20.04

	steps:
	- name: Check out repository code
	uses: actions/checkout@v2

	- name: Install g++ 10
	run: sudo apt-get install -y g++-10
	&& echo "CXX=g++-10" >> "$GITHUB_ENV"

	- name: Install Verilator dependencies
	run: \|
	sudo apt-get install -y \
	git help2man perl python3 make \
	libfl2 \
	libfl-dev \
	zlibc zlib1g zlib1g-dev \
	git autoconf flex bison

	- name: Cache Verilator
	id: cache-verilator
	uses: actions/cache@v3
	with:
	path: /opt/verilator
	key: verilator-${{ env.VERILATOR_VERSION }}-${{ runner.os }}

	- name: Clone Verilator
	if: steps.cache-verilator.outputs.cache-hit != 'true'
	run: git clone https://github.com/verilator/verilator $HOME/verilator
	&& cd $HOME/verilator
	&& git checkout $VERILATOR_VERSION

	- name: Build Verilator
	if: steps.cache-verilator.outputs.cache-hit != 'true'
	run: cd $HOME/verilator
	&& autoconf
	&& ./configure --prefix /opt/verilator
	&& make -j `nproc`

	- name: Install Verilator
	if: steps.cache-verilator.outputs.cache-hit != 'true'
	run: cd $HOME/verilator
	&& sudo make install

	- name: Add Verilator to $PATH
	run: echo "/opt/verilator/bin" >> $GITHUB_PATH

	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: "3.6"

	- name: Set up testing environment
	run: pip install -r test/requirements.txt

	- name: Install direnv
	run: sudo apt-get install -y direnv

	- name: Run tests
	run: \|
	cd test
	direnv allow
	direnv exec . pytest

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