Makefile: allow command-line overrides

To enable the DBEUG configuration option, it is now sufficient to
call:

	$ DEBUG=true make

instead of having to edit the Makefile.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
1 file changed
tree: 98d7d4a3d9588de3ccc419370b28df91df6397e0
  1. .gitignore
  2. COPYING
  3. Makefile
  4. build/
  5. config/
  6. debug/
  7. doc/
  8. hotplug/
  9. man/
  10. src/
  11. udev/