C language compilation process and GCC compilation parameters, gcc compilation Parameters

C language compilation process and GCC compilation parameters, gcc compilation Parameters

C language compilation generally involves three steps:

Gcc-E-o a. e a. c

Pre-compile the. c file. The generated target file name is a.e.

Pre-compilation is to replace the header file content contained in include with the C file, and delete unused comments in the code.

Example:

// Main. c

# Include <stdio. h>

# Include "sum. h"

Int main (){

Int m = 6;

Int n = 5;

Int result = sum (m, n); printf ("hello \ n % \ n", result );

// Sum. h

Int sum (int x, int y );

The result is as follows:

This is the first step!

2.Compile

Gcc-S-o a. s a. e

Translate a.e into an ASCII assembly language file a.s.

3. Links

Gcc-o a. s

This command tells gcc to link source program a. o and generate executable program.

Gcc does not have any parameters, indicating that it is a link.

The basic options of the GCC compiler are as follows:

Type	Description
-E	Stops after preprocessing without compilation, compilation, and connection.
-S	Stops compilation without compilation or connection.
-C	Compile or compile the source file, but do not connect
-O file	Specify the output file

Include header file in C Language

Considerations for header files: