Make fails because make targets were not generated properly.

Code:
Making all in Sources
make[1]: Entering directory `~/Development/ClanLib-2.0/Sources'
Making all in API
make[2]: Entering directory `~/Development/ClanLib-2.0/Sources/API'
make[2]: *** No rule to make target `Display/display_defines.h', needed by `all-am'. Stop.
make[2]: Leaving directory `~/Development/ClanLib-2.0/Sources/API'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `~/Development/ClanLib-2.0/Sources'