bug#17201: xf86-input-evdev fails to build

[Mark H Weaver]

With current master, xf86-input-evdev 2.7.0 fails to build on my x86_64
machine.  During ./configure it reports:

--8<---------------cut here---------------start------------->8---
checking for UDEV... no
configure: error: Package requirements (libudev) were not met:

No package 'libudev' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables UDEV_CFLAGS
and UDEV_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.
phase `configure' failed after 7 seconds
--8<---------------cut here---------------end--------------->8---

      Mark