Thread: Compiling C program and creating executable file under Linux / UNIX

You need GNU C and C++ compiler for compiling C program and creating an executable file. You can use gcc command to compile program.

First make sure you have gcc installed:

Code:

which gcc

Output

Code:

/usr/bin/gcc

ok u have C compiler in ur box.. [ if u don't have install gcc ]


To compile C program you need to use syntax as follows:

Code:

gcc -o program-output program.c

Now Write Our First C Program Under Linux / UNIX

Use a text editor such as vi or gedit to create a C program called first.c:

Code:

$ vi first.c

Type the following lines (program):

Code:

#include <stdio.h>
int main(void){
printf("My first C program\n");
return 0;
}

How Do We Compile Our Program?

To compile C program first.c, and create an executable file called first, enter:

Code:

$ gcc -o first first.c

OR

Code:

$ cc -o first first.c

To execute program first, enter:

Code:

$ ./first

Output:

Code:

My first C program

However, both FreeBSD and Linux support direct make command on C program without writing a make file. Remove, first program using the rm command:

Code:

$ rm first
$ make first

Output:

Code:

cc   first.o   -o first

Execute program first:

Code:

$ ./first