Global USE flag

Add USB support to applications that have optional USB support (e.g. cups)

Packages describing “usb” as local USE flag

Package “usb” Flag Description
app-crypt/ekeyd Build the libusb-based userland daemon for accessing the EntropyKey (alternative to the CDC USB driver). It is suggested to use this option by default, as the CDC driver in the kernel often seems to be fragile (or the gadget implementation on the EntropyKey is too buggy), and can cause various problems.
app-crypt/gnupg Build direct CCID access for scdaemon; requires dev-libs/libusb.
app-emulation/qemu Enable USB passthrough via dev-libs/libusb
media-gfx/cura Access 3D printers via USB
sys-apps/hwids Install the usb.ids database
sys-firmware/ipxe Build a bootable USB image for using PXE