Setup Objective-C programming environment on Ubuntu Distributions

Objective-C is a programming language which expands C programming language by including Smalltalk object orientated programming language. It has robustness like C programming language as well as it is feature rich like C++ and Java. It fully supports object oriented programming including Encapsulation, Data hiding, Inheritance and Polymorphism. It is the main programming language for OS X and iOS application development.

GNU Compiler Collection (GCC) provides compiling support for Objective-C source files through GNUstep framework. It is very easy to setup Objective-C development environment on Ubuntu based distributions. We just have to install few packages on to our Ubuntu System.

From your favourite package manager just install the following packages:

• gobjc
• gnustep
• gnustep-make
• gnustep-common
• gnustep-core-devel
• gnustep-devel

Or in the terminal put the following command:

sudo apt-get install gobjc gnustep gnustep-make gnustep-common gnustep-core-devel gnustep-devel

Once all the packages are installed properly, you should be able to compile any Objective-C source file by entering the following command in the terminal:

gcc source.m `gnustep-config --objc-flags` -lobjc -lgnustep-base

This should produce a.out binary in the current directory.

For Example, put the following codes into a text editor and save it as Hello.m

#import <Foundation/Foundation.h>

int main(int argc, char *argv[])
{
    NSLog(@"Hello, World!\n");
   
   return 0;
}

Now, compile the source file Hello.m using following command in the terminal:

gcc Hello.m `gnustep-config --objc-flags` -lobjc -lgnustep-base

Now, run the executable file by putting following command in the terminal:

./a.out

You should see something like below in the terminal,

2015-04-22 19:24:26.483 a.out[31686] Hello, World!