Mac OS X: Install GCC Compiler with Xcode

Step #1: Install Xcode on a Apple Mac OS X

First, make sure Xcode is installed. If it is not installed on OS X, visit app store and install Xcode.

Fig.01: Make sure Xcode developer tools are install OS X

Step #2: Install gcc/LLVM compiler on OS X

Once installed, open Xcode and visit:

Xcode menu > Preferences > Downloads > choose "Command line tools" > Click "Install" button:

Fig.02: Installing gcc compiler on Mac OS X

Step #3: Verification

Open a terminal app and type the following commands:
$ gcc --version
$ whereis gcc
$ whereis make
Sample outputs:

Fig.03: Verify gcc compiler installation on Mountain Lion OS X

Testing sample “Hello world” C program

Create a text file called a.c as follows using a text editor such as vi or cat command:

/* a.c - demo for os x */
#include<stdio.h>
int main(void){
 printf("Hello world\n");
 return 0;
}

To compile, enter:
$ make a
Run it as follows:
$ ./a
Sample outputs:

Fig.04: Compiling and running sample “Hello world” C program on Mountain Lion 10.8.4

See also

And, there you have it, the gcc version 4.2.1 installed and working correctly on the latest version of Mac OS X 10.8.4. In Apple’s version of GCC, both cc and gcc are actually symbolic links to the llvm-gcc compiler. Similarly, c++ and g++ are links to llvm-g++. For more information and examples see the following man pages:

$ man gcc $ man make