Packages with the libusb use flag

media-tv / kodi : A free and open source media-player and entertainment hub

  • Use virtual/libusb for usb device hotplug support. This flag should only be enabled if you're running a non-Linux kernel or you don't want to use sys-fs/udev.

net-misc / bfgminer : Modular Bitcoin ASIC/FPGA/GPU/CPU miner in C

  • Use libusb

net-wireless / kismet : IEEE 802.11 wireless LAN sniffer

  • Support libusb based capture sources such as mousejack, cc2540(ble), and nrf51822(ble)

sys-apps / pcsc-lite : PC/SC Architecture smartcard middleware library

  • Use dev-libs/libusb detection to hotplug new smartcard readers. This flag should only be enabled if you're running a non-Linux kernel or you don't want to use sys-fs/udev.