configure.ac: AC_SEARCH_LIBS(clock_gettime) to be able to add -pthread
configure.ac: AC_SEARCH_LIBS(clock_gettime) to be able to add -pthread

tenderlove/libusb,hjelmn/libusb-darwin,bert/libusb,ashima/libusb,legege/libusb,hjelmn/libusb-darwin,dasdeepak/libusb,dasdeepak/libusb,dasdeepak/libusb,bert/libusb,legege/libusb,ashima/libusb,tenderlove/libusb,ashima/libusb,legege/libusb