使用 gcc 编译 C 程序

Question

A simple question that I cannot seem to find. When I am compiling a program with gcc my professor tells me to have -g and -o when I am compiling it and I am not too sure why. I could not find it in the man pages of gcc with there being so much on there.

For example...

gcc -g -o myprogram myprogram.c

Answer 1

-g means to include debugging information, which enables a debugger to know where a named object (variable) is in the memory or registers of the executing process and to know which instructions correspond to which lines of source code.

-o myprogram says to put the output file in myprogram . (If you do not specify -o with a file name, GCC defaults to putting the output in a file named a.out .)