ci: fix compilation of test with latest V 0.4.8 #42

	name: Build and Test with latest V

	on: [push, pull_request]

	jobs:
	ubuntu:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout V
	uses: actions/checkout@v2
	with:
	repository: vlang/v
	path: v

	- name: Build V
	run: cd v && make && sudo ./v symlink && cd -

	- name: V doctor
	run: v doctor

	- name: Checkout msgpack
	uses: actions/checkout@v2
	with:
	path: repo

	- name: Symlink msgpack
	run: mkdir -p ~/.vmodules/ ; ln -s $(realpath repo) ~/.vmodules/msgpack

	- name: Ensure everything is formatted
	run: v fmt -verify ~/.vmodules/msgpack/

	- name: Ensure docs is OK
	run: v check-md ~/.vmodules/msgpack/README.md

	- name: Ensure all examples compile with -W
	run: v -W should-compile-all ~/.vmodules/msgpack/examples/

	- name: Run basic example with -Wimpure-v
	run: v -Wimpure-v crun ~/.vmodules/msgpack/examples/basic.v

	- name: Run bench example
	run: v run ~/.vmodules/msgpack/examples/bench_msgpack_json_vs_json2.v

	- name: Run example with -prod -cstrict -Wimpure-v -cc clang
	run: \|
	cd ~/.vmodules/msgpack
	v -prod -cstrict -Wimpure-v -cc clang crun examples/basic.v

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