# Checks for libraries.
PKG_CHECK_MODULES(USB, libusb-1.0 >= 1.0.0,,
AC_MSG_ERROR([*** Required libusb-1.0 >= 1.0.0 not installed ***]))
# Checks for libraries.
PKG_CHECK_MODULES(USB, libusb-1.0 >= 1.0.0,,
AC_MSG_ERROR([*** Required libusb-1.0 >= 1.0.0 not installed ***]))