A Program for Automatically Generating GNU-Style Makefile.in Files
http://www.gnu.org/software/automake

Automake is a tool for automatically generating "Makefile.in" files
from "Makefile.am" files.  "Makefile.am" is a series of "make" macro
definitions (with rules occasionally thrown in).  The generated
"Makefile.in" files are compatible with the GNU Makefile standards.