Allow `cfg` attributes #193

	name: Rust

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	env:
	CARGO_TERM_COLOR: always

	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	RUST: ["1.63", stable, beta, nightly]
	steps:
	- uses: actions/checkout@v2
	- name: Set Rust version
	run: rustup default ${{ matrix.RUST }}
	- name: Build
	run: cargo build --verbose
	- name: Run tests
	run: cargo test --verbose

	no-std-test:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Build
	run: cargo build --verbose --no-default-features
	- name: Check under no_std
	run: \|
	# aarch64-unknown-none is Tier 2, has no `std`, but does have atomic pointers.
	rustup target add aarch64-unknown-none
	cargo check --verbose --target aarch64-unknown-none --no-default-features

	miri-test:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Setup MIRI-Compatible Toolchain
	run: \|
	MIRI_NIGHTLY=nightly-$(curl -s https://rust-lang.github.io/rustup-components-history/x86_64-unknown-linux-gnu/miri)
	echo "Installing latest nightly with Miri: $MIRI_NIGHTLY"
	rustup set profile minimal
	rustup default "$MIRI_NIGHTLY"
	rustup component add miri
	- name: Run tests with MIRI
	working-directory: examples
	run: cargo miri test --features="miri"

Provide feedback