robmelfi/cs-olympics-training

GCC (GNU Compiler Collection)

Compile/Link a Simple C++ Program - hello.cpp

We use the -o option to specify the output file name
g++ -o hello hello.cpp
./hello

More GCC Compiler Options

g++ -Wall -g -o hello hello.cpp

• -o: specifies the output executable filename.
• -Wall: prints "all" Warning messages.
• -g: generates additional symbolic debuggging information for use with gdb debugger.

Compile and Link Separately

Compile-only with -c option g++ -c -Wall -g hello.cpp
Link object file(s) into an executable g++ -g -o hello hello.o

Compile and Link Multiple Source Files

g++ -o myprog file1.cpp file2.cpp

GNU Make

Create the following file named "makefile" (without any file extension), which contains rules to build the executable, and save in the same directory as the source file. Use "tab" to indent the command (NOT spaces).

all: hello

hello: hello.o
	 gcc -o hello hello.o

hello.o: hello.c
	 gcc -c hello.c

clean:
	 rm hello.o hello

or

all: hello

hello: hello.c
	 gcc -o hello hello.c

clean:
	 rm hello

GNU Make for Multiple Source Files

all: myprog

myprog: myprog.c
	 gcc -o myprog file1.cpp file2.cpp

clean:
	 rm myprog