0-15 GCC Program compilation

Usage: gcc [...] filenames

Example: GCC hello.c

Output: a.out

Procedure: hello.c pre-mutation hello.i after compilation Hello.s post hello.o link after hello

Pre-compilation:

GCC-E Hello.c-o hello.i

Compile:

Gcc-s Hello.i-o Hello.s

Assembly:

Gcc-c Hello.s-o hello.o

Link:

GCC Hello.o-o Hello

File format:

*.C C Language Source code

*.h header File

*.A Library file

*.O target file

*. C *.cc *.cpp C + + files

*.S *. S assembly File

GCC compilation options:

-o Specifies the output executable file

-O to optimize the compilation of the program

-o2 better compiling for the program, consuming more time

-C only compile not connected, output *.O target file

-G produces the required symbols for GDB for debugging

Linux system header files are generally stored in the/usr/include, if the header file is stored in the current directory, the reference format is:

#include "XXX.h"

Or, use the-I option to specify where the header file is stored, such as:

Gcc-i/root Hello.c-o Hello

Pre-compiled use:

#define PRINT

#ifdef PRINT

...

#endif

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0-15 GCC Program compilation