revert a6ad837b (use ocamlc to test C compiler in configure) #12

	name: build

	on:
	pull_request:
	push:
	branches:
	- master
	schedule:
	# Prime the caches every Monday
	- cron: 0 1 * * MON

	jobs:
	build:
	strategy:
	fail-fast: false
	matrix:
	os:
	- ubuntu-latest
	- windows-latest
	- macos-latest
	ocaml-compiler:
	- 4.14.x
	include:
	- os: ubuntu-latest
	ocaml-compiler: 5.0.x
	- os: macos-latest
	ocaml-compiler: 5.0.x
	- os: windows-latest
	ocaml-compiler: ocaml.5.0.0,ocaml-option-mingw

	runs-on: ${{ matrix.os }}

	steps:
	- name: Checkout code
	uses: actions/checkout@v3

	- name: Use OCaml ${{ matrix.ocaml-compiler }}
	uses: ocaml/setup-ocaml@v2
	if: runner.os != 'Windows'
	with:
	ocaml-compiler: ${{ matrix.ocaml-compiler }}
	dune-cache: true
	opam-depext: true
	opam-depext-flags: --with-test

	- name: Use OCaml ${{ matrix.ocaml-compiler }}
	uses: ocaml/setup-ocaml@v2
	if: runner.os == 'Windows'
	with:
	ocaml-compiler: ${{ matrix.ocaml-compiler }}
	opam-repositories: \|
	dra27: https://github.com/dra27/opam-repository.git#windows-5.0
	default: https://github.com/ocaml-opam/opam-repository-mingw.git#sunset
	opam: https://github.com/ocaml/opam-repository.git
	dune-cache: true
	opam-depext: true
	opam-depext-flags: --with-test

	- name: configure tree
	run: opam exec -- ./configure

	- name: Build
	run: opam exec -- make

	- name: Run the testsuite
	run: opam exec -- make -C tests test

	- run: opam install . --with-test

	- run: opam exec -- git diff --exit-code
	if: ${{ !matrix.skip-test }}

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