[C Language][Object] Compile C become object && link object to binary file (executable file)

[C Language][Object] Compile C become object && link object to binary file (executable file)

To use basic compilation involving multiple files or object files, start with the following two source files:

one.c

 #include <stdio.h>
void hello()
{
  printf("Hello world!\n");
}

two.c

 extern void hello();

int main()
{
  hello();
  return 0;
}

The following procedure illustrates a simple, multi-file compilation process in its most basic form.

Procedure 5.3. Compiling a Program with Multiple Source Files

1. 
   
   
   Compile one.c into an executable with:
   
   
   
   gcc -c one.c -o one.o
   
   
   
   Ensure that the resulting binary one.o is in the same directory as one.c.
   
   


2. 
   
   
   Compile two.c into an executable with:
   
   
   
   gcc -c two.c -o two.o
   
   
   
   Ensure that the resulting binary two.o is in the same directory as two.c.
   
   


3. 
   
   
   Compile the two object files one.o and two.o into a single executable with:
   
   
   
   gcc one.o two.o -o hello
   
   
   
   Ensure that the resulting binary hello is in the same directory as one.o and two.o.
   
   


4. 
   
   
   Run the hello binary, i.e. hello.
   
   

Reference :

• 
  Chapter 5.  Compiling and Building


• 
  Tenouk's C & C++ program examples, source codes and tutorials download page