Out of the box, OS X doesn’t include the standard C compilers (C, C++, Obj-C). While they are unnecessary for the average customer, many technical users (or people learning C for the first time) like to have access to a C compiler on the command line — without delving into Apple’s comprehensive development system and the Xcode IDE. Here’s how to do it — for free.
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Aug 21, 2011 I'm looking for a BASIC compiler for Mac OS X. I'm thinking maybe there's something that I could run in Terminal? I don't need to do anything graphical, just basic BASIC, and I don't much feel like learning the differences in RealBASIC (or paying for an expensive compiler.).
Out of the box, OS X doesn’t include the standard C compilers. While they are unnecessary for the average customer, many technical users like to have access to a C compiler on the command line. Oct 16, 2019 A list of best C, C compilers to work with Mac OS X, Linux, Windows 7/8/8.1 OS environment is given here – Eclipse C Compiler. With Eclipse you get advance functionality for programming in C, C on an open-source platform. This IDE is really a simple to use IDE, perfect for anyone new to programming. While an Ada compiler is available for Mac OS X I have ran into quite a few issues trying to compile GHDL. These issues include Ada conflicting with Xcode, the Ada environmentnot fully compatible with Makefiles from the Linux world, weird linker problems and many more.
The first thing to know is good news. You don’t have to pay US$99 and become a member of Apple’s Developer program to follow these instructions. You can download Apple’s Xcode 4.1 for free, and its installer will give you gcc, g++, and llvm-gcc nicely installed and ready for the command line. The bad news is that you’ll have to be using Lion. And, you’ll need to have an Apple ID, even though the download is free.
What starts this odyssey for most technical users is that they’re perusing a new Mac, open a terminal, and type, out of curiosity:
and find to their dismay that that there’s no C compiler to be found. WTF?
The Ugly “Before”
Unlike most other UNIX vendors, Apple feels that this is an unnecessary addition and that technical users, if they need it, can go install it. However, those who are new to the Mac are often not quite sure about the best way to do that. Here’s the easy way.
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1. First, go to the Apple menu in Lion and select “App Store…” Do a search for “Xcode.” You should see something similar to this. (Note, in my case, Xcode is marked as already installed.)
Mac Apple Store (MAS) Xcode on the left.
2. After you download Xcode, there will be an installer in /Applications. It looks like this in icon view.
Xcode Installer icon
3. Double click this application, if it didn’t already launch after the download, and a complete development system will be installed on your Mac and placed in the root of the file system — in a directory called “Developer.” You can explore the contents and the Integrated Development Environment (IDE) at your leisure. So just go ahead and quit Xcode (CMD-Q) after the installer is done.
You won’t be needing this right away, so quit the app.
4. Now open the terminal and type “gcc -v” again. Bliss!
The Beautiful “After”
You’ll notice that gcc 4.2.1 is installed. Also, g++ is installed. For those who prefer, the more modern Low Level Virtual Machine (LLVM) C compiler that Apple is now using is also installed. These are all in the expected place: /usr/bin. Note that the Xcode installer also drops in the man pages for these compilers.
llvm pointers in /usr/bin
Additional Notes
That’s all you need to do. If at some future point, you want to explore GUI app development on the Mac, you can learn Xcode, found in /Developer/Applications as well as the primary development language for OS X and iOS apps called Objective-C. (The version of gcc installed will compile Objective-C code.)
To learn more about how Apple has implemented llvm-gcc, the default compiler in Xcode, here’s a really good, quick and handy reference article to digest before you dig into Apple’s extensive developer documentation.
Apple is no longer maintaining gcc, so you might as well move to llvm-gcc on the command line.
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Finally, the sake of completeness, I should add that Dr. Gaurav Khanna, an astrophysicist in the Physics Department at the University of Massachusetts at Dartmouth, maintains a computational tools page that goes well beyond the simple C compilers mentioned above. He generally keeps these tools updated for the latest version of OS X.
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UPDATE: April 4, 2012. Things have changed slightly since this article was written. See this update: “Install the Command Line C Compilers in OS X Lion.”
I have Mac OS X Mountain Lion. I need to compile a few apps and Perl modules. I already installed Xcode from app store but I’m unable to find gcc compiler or make command. How do I install gcc on Mac OS X 10.8.x?Xcode includes command line development tools such as gcc and friends.
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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.
Step #2: Install gcc/LLVM compiler on OS X
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Once installed, open Xcode and visit:
Xcode menu > Preferences > Downloads > choose 'Command line tools' > Click 'Install' button:
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Xcode will download package and install copies of the core command line tools and system headers into system folders, including the LLVM compiler, linker, and build tools.
Step #3: Verification
Open a terminal app and type the following commands:
Sample outputs:
$ gcc --version
$ whereis gcc
$ whereis make
Sample outputs:
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:
To compile, enter:
Run it as follows:
Sample outputs:
$ make a
Run it as follows:
$ ./a
Sample outputs:
See also
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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
G++ Compiler Mac
13 in theMac C++ Compiler
Linux GNU/GCC Compilers TutorialAda Compiler For Mac Os X 10 12
series. Keep reading the rest of the series:Ada Compiler For Windows 10
- Mac OS X: Install GCC Compiler with Xcode