thanks to antoine, Gem is now using travis-ci for automated test-builds whenever something is pushed to the (github) repository.
https://travis-ci.org/umlaeute/Gem/
todo - enable OSX-builds (antoine, how did you do that?) - upload the built binaries to some webserver (e.g. github) - fix the build-matrix to avoid unnecessary builds
caveats - currently only linux (and osx, see todo) are supported by travis-ci - "linux" is some rather outdated ubuntu (12.04, amd64 only)
fnsdr IOhannes