C-Language Step-up compilation

　Throughout the process of implementing the C-language source code to the executable program, the entire formation process can be divided into four steps:

1, pretreatment gcc-e hello.c-o hello.i

Objective:

(1) Macro definition expansion

(2) Head file expansion

(3) Conditional compilation

(4) Remove comments

2, compile gcc-s hello.i-o Hello.s

(1) Check grammar

(2) Turn C into Assembly language

3, assembly gcc-c Hello.s-o hello.o

Turn assembly language into machine languages (binary code)

4. Link gcc hello.o-o hello.exe

Linking a C-dependent library to a program

The one-step implementation of the compilation is:

Gcc-o Hello.exe hello.c

C-Language Step-up compilation