Make


The "make" program is used to "make" files
It is configured by "makefile" or "Makefile"
The makefile is written in a descriptive language
Execution of each rule is based on file date and time
It uses implied rules on file names

GNU make has some procedural features as well
Conditional execution
ifdef
ifeq 
Immediate assignment (":=")
Incremental assignment ("+=")
Conditional assignment ("?=")