[submodule "opt/asio"]
	path = opt/asio
	url = https://github.com/chriskohlhoff/asio.git
[submodule "opt/fmt"]
	path = opt/fmt
	url = https://github.com/fmtlib/fmt.git
[submodule "opt/klog"]
	path = opt/klog
	url = https://github.com/cageq/klog