Merge pull request #147 from MarkGillespie/MMPGradients #157

	name: linux

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	build:
	strategy:
	matrix:
	os: [ubuntu-18.04, ubuntu-latest]
	runs-on: ${{ matrix.os }}
	if: "! contains(toJSON(github.event.commits.*.message), '[ci skip]')"
	steps:
	- uses: actions/checkout@v1
	with:
	submodules: true

	- name: set_gcc_version
	if: matrix.os == 'ubuntu-18.04'
	run: \|
	sudo apt install software-properties-common
	sudo add-apt-repository ppa:ubuntu-toolchain-r/test
	sudo apt-get update
	sudo apt install gcc-5 g++-5
	sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 90 --slave /usr/bin/g++ g++ /usr/bin/g++-5 --slave /usr/bin/gcov gcov /usr/bin/gcov-5

	- name: configure
	run: cd test && mkdir build && cd build && cmake -DCMAKE_BUILD_TYPE=Debug ..

	- name: build
	run: cd test/build && make

	- name: run test
	run: cd test/build && ./bin/geometry-central-test

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