48 - ubuntu-toolchain-r-test
51 - ./travis-autogen.sh && make -j4
52 - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then make clean && ./travis-autogen.sh --disable-udev && make -j4 ; fi
53 - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then cd Xcode && xcodebuild -project libusb.xcodeproj ; fi