makefile M A Doman Compiling multiple objects Card

makefile M. A Doman

Compiling multiple objects Card. cpp Deck. cpp main. cpp -> Card. o -> Deck. o -> main. o Deck. o Card. o -> Dealer. exe

Include Guards: Preprocessing Directives #ifndef #define _includename. type #endif

Include Guards: Preprocessing Directives When file is included, the preprocessor checks if a unique value is defined. If not, it includes the file. If it already is defined, it skips the inclusion

What is the make utility? • make is a standard linux command to automatically determine when parts of a large project require recompilation • Governed by a set of rules built in a makefile • Syntax: # indicates comment line target: prerequisite list [TAB] construction command •

make clean target • Used to clean up the directory • In makefile: Clean: rm list the object files you want removed. continue on next line.

make: # final rule final: main. o Deck. o Card. o c++ –o Dealer main. o Deck. o Card. o #compile main. o: main. cpp Deck. cpp CCrd. cpp #compile Deck Class Deck. o: Deck. cpp Card. cpp c++ -c Deck. cpp #compile card class Card. o: Card. cpp c++ -c Card. cpp

make: using variables and comments You can also use variables when writing makefiles. # Comment that will say I’m creating a variable for compiler CC = g++ # Comment for a set of option flags used for compilation CFLAGS = -c # Link final program final: main. o Deck. o Card. o $(CC) –o Deale main. o Deck. o Card. o #compile main. o: main. cpp $(CC) $(CFLAGS) main. cpp

make: using variables and comments You can also use variables when writing makefiles. # Comments that help me remember what I’m doing #clean directory # -f ignores nonexistent files without prompt # -r removes directories and contents recursively clean: rm –fr *. o Dealer

Makefile lab • Continue now with makefile lab

UNIX Tutorial The following comes from the site: UNIX Tutorial for Beginners By the University of Surrey