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This post will guide you how to install GNU GCC compiler on Mac OS X system. How do I install command line tool for xcode package to install Gcc compiler on Mac OS system. How to install gcc command line tool in Mac OS Sierra. Feb 07, 2011.

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After installing the GNU compilers, you may want to check out the HOWTO for installing Open MPI on Mac OS X.

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Background

One of the nice things about Mac OS X is that you have a polished user interface atop a Unix operating system. This means that using command line utilities such as compilers is straightforward, making coding on your Mac easy. If you have a multi-core Mac (most should by now) and would like to run codes that use MPI to distribute processing across multiple processor cores, you should also check out the HOWTO for installing Open MPI on Mac OS X. Note that you'll need to follow the instructions on this page prior to installing Open MPI if you don't already have some set of compilers installed.

Requirements

To install the GNU compilers as described in this HOWTO, you'll need the following:

• A Mac running 10.11 (El Capitan)
  • If you are using Mac OS X 10.6 - 10.10, check out the instructions for older versions of Mac OS X
• An Apple App Store account
• Internet access

Video instructions for Mac OS 10.11 (El Capitan) with Xcode 7

Rough video transcript:

Hello, and welcome to this screencast on how to install the GNU C, C++ and Fortran compilers for Mac OS 10.11 (El Capitan). In this video, I will show you how to install the compilers as well as Apple’s Xcode software, which is required for the compiler installation. For this video, I am assuming you are using a Mac running Mac OS 10.11, also known as El Capitan, that you have an Apple App Store account and that you have internet access. I am also assuming you have administrator access on your Mac, allowing you to install software. If you’re running an older version of Mac OS X, the installation procedure will be similar, but you can check out the link at the end of this video for the installation procedure on older versions of Mac OS X back to 10.6.

Step 1: We’ll begin by installing the current version of Apple’s Xcode software, Xcode 7. To install Xcode, start by opening the App Store app by clicking on the Apple logo on the top left of the menu bar and then selecting App Store… Once the App Store app opens, enter 'Xcode' into the search and press Enter. You can now click install to install Xcode. You may be prompted to enter your Apple ID and password if you’ve not previously installed applications via the App Store. Xcode is a pretty big download, so depending on the speed of your internet connection it may take some time to download and install. I’ll be back once the install is complete.

Step 2: Xcode has been downloaded and installed, and now we can move on to a critical second step for the Xcode install, installing the command line tools. To do this, we can use Spotlight to open the Terminal app. If you’re installing compilers, I am going to assume you’re at least somewhat familiar with using a terminal emulator. If not, you should still be able to do the install by following these instructions carefully. Once Terminal has opened, type in xcode-select --install. This will install the command line tools for Xcode, and you will be asked to perform the install using the typical application installation process. This may include asking you for your password.

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Step 3: Now that Xcode is fully installed, we can move on to downloading the GNU compilers from the High-Performance Computing for Mac OS X website. The easiest way to get there is to open a web browser, Safari in this case. And type in 'High-performance computing Mac OS X' in the Google search. It should be the top hit. On that page, we’ll grab the latest STABLE version of the GCC compiler package and click the link to download.

Step 4: After the compilers have downloaded, we can return to the Terminal and navigate to the Downloads directory. We’ll install the compilers now using the `sudo` command, and before we do so, I’m going to give you a little warning. Using the sudo command can do major damage to your computer if you aren’t careful, so please type the following exactly as shown to do the install: sudo tar -xvf gcc-5.3-bin.tar -C /. If your downloaded package ends in .tar.gz, you’ll need to add z to the list of flags after the tar command. This should take just a moment and will install the compilers in /usr/local.

Step 5: Now the compilers are installed, and if you’re running Mac OS 10.11, you should be able to test the installation by typing gcc -v. It should show version 5.3. You can try the same with the Fortran compiler by typing gfortran -v. If they return the compiler versions as expected, you’re all set. Enjoy.
- If your compilers are not installed, you may need to add the installation location to the PATH environment variable, which tells the computer where to look for command line programs.
- In that case, the easiest thing to do is go to the installation HOWTO at the link at the end of this video and check out the last section of the instructions for the installation for Mac OS 10.9 or 10.10. There are some additional instructions that may help resolve your issues. If you’re still having trouble, double check you’ve followed the instructions exactly as given in the video and feel free to add a comment if you still need some help.
- OK, so that’s it. Thank you for watching. If you have any comments, please leave them below. In case you’re interested, here’s another link to a video on how to install the Open MPI software for running multi-core applications on your Mac using MPI, the message-passing interface. Good luck!

Instructions for older versions of Mac OS X (10.6 - 10.10)

Instructions for installing the GNU compilers for older versions of Mac OS X (10.6 - 10.10) have been moved and are available on another page.

Tips & Warnings

I mention all but the last of these tips and warnings in the text above, but it doesn't hurt to list them a second time..

• Beware that using sudo can do major damage to your computer if you aren't careful.
• Note that after installing Xcode, you also need to perform a critical additional step.
  • Launch Xcode and install any available updates. Quit Xcode.
    
  • Launch Terminal.app (in /Applications/Utilities, hopefully you know that)

  • Install the Command Line Tools for OS X by typing
    

    This will open a dialog box to install the Command Line Tools for Xcode package. Install following the standard procedure.

• If the correct version of gcc is not being found at the command line after installation, it is possible that you're using a terminal emulator that reads the .bashrc file rather than the .bash_profile file. To confirm, do the following:

  • Open a new terminal window using your terminal emulator of choice. This will reread the either the .bash_profile file or the .bashrc. If the new gcc version is not returned when typing
    

    then your terminal emulator may be reading the .bashrc file.

  • You can fix this one of two ways

    • Create a symbolic link called .bashrc that points to .bash_profile by typingFlash animation mac free download.

    • Modify the order of directories that are searched for commands by typing

Related

This post will guide you how to install GNU GCC compiler on Mac OS X system. How do I install command line tool for xcode package to install Gcc compiler on Mac OS system. How to install gcc command line tool in Mac OS Sierra.

Installing GCC Compiler on Mac OS X

You need a free developer login to Apple Developers to download one package named “Command Line Tools for Xcode“. or you can install Xcode via App store directly, then open Xcode to install command line tools.

What is Xcode?

Xcode is a large suite of software development tools and libraries from Apple. The Xcode Command Line Tools are part of XCode. Installation of many common Unix-based tools requires the GCC compiler. The Xcode Command Line Tools include a GCC compiler.

Gcc Compiler Verifiecation

After the Command Line Tools for Xcode package is installed, you can try to check the GCC compiler if it is installed properly. Type:

Or you can create a C program named fio.c via vim text editor and append the following code:

Save and close the file and then compile and execute it, type:

You might also like:

Installing G++ on a Mac

This section is intended to get you quickly started with C++ programming on your Mac. We'll be installing GCC 4.8.1 and GDB through a tool called Homebrew. If you want an additional guide on all of the following steps (except for installing GCC), the one by Moncef Belyamani is quite helpful. When you follow it, ignore anything about installing Ruby; that is, stop after setting up git.

Homebrew

Homebrew 'installs the stuff that you need that Apple don't'. It's like Ubuntu's apt-get, where one can install packages easily from repositories. Instead of having to download, configure, and install something yourself, all you need to do is run one command, and Homebrew will take care of the rest for you.

Pre-requisites

Homebrew requires that you have either Xcode or the Xcode command line tools installed on your Mac. Xcode is a free integrated development environment similar to Eclipse designed by Apple and mainly intended for iOS development or targeting the clang compiler. In this class, we will focus on gcc.

Xcode is quite a big install, so if you do not want to install it, you can get away with just installing the Xcode command line tools. See a Stackoverflow discussion for instructions on how to install the command line tools regardless of whether you have Xcode installed.

Installing Homebrew

You need xcode command line tools to install Homebrew. It is very easy to install Homebrew. Open your terminal, and run the following command:

If this doesn't seem to do anything, try killing it (CTRL C) and running it again. Or checkout homebrew website.

GCC and GDB

Installing GCC

First of all, you should make sure that your Homebrew is up-to-date. Check to see if it is so with the following:

As mentioned before, installing packages with Homebrew is very easy. First, we will add the repository from which the GCC package is available, so that Homebrew knows where to find the package we want. The repository is at https://github.com/Homebrew/homebrew-versions.

We do this by using the brew-tap command. Keep your terminal open, and run the following command. (For more information on how brew-tap works, visit the Homebrew docs):

Next, we will actually install the GCC package. Run the following command:

It might take long time before the installation is complete. If you run into any issues, you can debug with:

When done, run the following:

The result should look like this:

USC Wireless Warning

Many people have had issues running the brew install commands while connected to USC Wireless. If you are having trouble, you can either try using a wired connection, a different wireless connection, or do the following:

1. Download a homebrew cache
2. Open Finder, press CMD (command) + SHIFT + G and type /Library/Caches/Homebrew

3. Extract the contents of the .zip you downloaded inside of the folder you opened in the previous step. Do not extract any of the .tar.bz2 or .tar.gz inside of the .zip folder.This should look as follows:

4. Run brew install gcc48 in the Terminal as instructed above.

Using G++

To compile with the newly installed G++ compiler, use g++-4.8.

(Advanced) Aliasing g++

If you prefer calling g++ directly, you can also create a bash alias, as follows:

Put these two lines at the end of the file ~/.bashrc, and run:source ~/.bashrc

For more information on bash alias, take a look at the GNU Docs.

Installing GDB

Here also we use Homebrew. The following instruction has been taken from GDB on OS X Mavericks and Xcode 5 guide. To install, run the following brew command.

Check if it's installed:

The result should be gdb version 7 or higher.

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Codesigning gdb

gdb is not going to debug yet. You'll get an error message like 'please check gdb is codesigned'. You need to create a certificate and sign gdb. By doing so you're telling the operating system that gdb is authorized to attach to other processes for debugging purposes. The following instructions have been taken from this Code Signing guide.

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1. Open application 'Keychain Access' (/Applications/Utilities/Keychain Access.app)

2. In Keychain Access, select the 'login' keychain in the 'Keychains' list in the upper left hand corner of the window.

3. Open the menu item in /Keychain Access/Certificate Assistant/Create a Certificate...

4. Choose a name ('lldb_codesign' in the example, but you can use anything you want), set 'Identity Type' to 'Self Signed Root', and set 'Certificate Type' to 'Code Signing'. Click 'Create'.

5. Click continue, continue and done.

6. Click on the “My Certificates” category on the left side and double click on the new “lldb_codesign” certificate.

7. Open the context menu for 'Trust' (click the triangle) and change the following:When using this certificate: Always Trust

8. Now close this window, and enter your login password to confirm this change.

9. Option-drag (this meaning holding the option key down and dragging) the new 'lldb_codesign' certificate from the login keychain to the System keychain in the Keychains pane of the main Keychain Access window to make a copy of this certificate in the System keychain. You'll have to authorize a few more times, set it to be 'Always trusted' when asked.

10. Switch to the 'System' keychain and drag a copy of the 'lldb_codesign' you just made onto the Desktop.

11. Switch to Terminal and then run the following command (copy paste it!): sudo security add-trust -d -r trustRoot -p basic -p codeSign -k /Library/Keychains/System.keychain ~/Desktop/lldb_codesign.cer

12. Then right click on the 'lldb_codesign' certificate in the 'System' keychain (not 'Login') and select 'delete' to delete it from the 'System' keychain.

13. Then reboot your system/computer.

14. Finally you can sign gdb:codesign -s lldb_codesign /usr/local/bin/gdb

15. If this command doesn't work...then panic! Just kidding, be sure that you have gdb installed and that gdb is actually installed in /usr/local/bin. You may want to try 'which gdb' in your Terminal to figure out where it is.

16. Finally, remove the lldb_codesign.cer file that's sitting on your desktop, and gdb should be working at this point. :)