| [SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [R] [S] [T] [U] [V] [W] [X] IDEs (Integrated Development Environments) 2nd if function ifeq conditional directive ifneq conditional directive immediate expansion implicit rules 2nd built-in source control and CVS include directive 2nd dependencies and header files optimization include processing --include-dir option incrementing info target initialization, performance and input files, text printing install target installers , reference builds and interfaces, phony targets and intermediate files, chaining rules and .INTERMEDIATE target modifier 2nd invoking make |