The Envoy build system uses cmake. In order to ease initial building and for a quick start, we provide an Ubuntu 14 based docker container that has everything needed inside of it to build and statically link envoy, see ci/README.md.
In order to build manually, cmake is used like so:
mkdir build cd build cmake .. make
Note that in order for the above raw build to work, cmake variables will need to be configured so that the envoy build can find all of the needed third party dependencies (other variables are also available to turn on debug builds, address sanitizer, etc.).