I did use ubuntu before. I share a server (Ubuntu 11.04) with other people and I am the only one who has to use gcc 4-4 for my code, the rest is using 4.5. This will give you the convenience of gcc being at the latest version, and still you will be able to invoke gcc-7 or gcc-8 directly. Whenever I use python3 . I use Ubuntu 18.04 and I have two gcc/g++ versions which are managed using update-alternatives: Code: sudo update-alternatives --install /usr/bin/gcc Ubuntu 18.04 - how to set clang as default compiler using update-alternatives Check the available C and C++ compilers list on your Ubuntu 20.04 system and select desired version by entering relevant selection number: $ sudo update-alternatives --config gcc There are 3 choices for the alternative gcc (providing /usr/bin/gcc). - how to change default g++ version in ubuntu terminal code example Example: gcc alternatives [email protected] :~# update-alternatives --config gcc update-alternatives: error: no alternatives for gcc. It contains the GCC compiler and many libraries and utilities necessary for compiling the software. Actually I have one module which is loaded in kernel with gcc 4.7 , but I want that same module to be compiled with gcc 4.6 while loading different kernel which has gcc 4.6 as default. How to install a functional ARM cross-GCC toolchain on Ubuntu 18.04 (Bionic Beaver) 0. I am running Ubuntu 18.10 and need to install gcc 8.2.0 to build kernel modules. I wish to change one common global place in the system instead of changing all make files. When I execute the command gcc it should call the gcc-3.3 and not gcc-4.4. After installing RHEL 7.2 and Dev. get info like gcc version 4.4.6 (Ubuntu/Linaro 4.4.6-llubuntu2) Step 2: How about switching to gcc 4.5?Check if you already installed the gcc 4.5 This operation worked smoothly but resulted in 2 installed C compilers. 1. gcc -v. If everything went fine you should see gcc 7.2.0 by the time I am writing this gist. Type in your terminal: sudo update-alternatives --config gcc. --edit 2 -- apt-get wants to install 8.3 To change the default gcc version, just run . You will be presented with a list of all installed GCC versions on your Ubuntu system. The current default is equivalent to -std=gnu90, which is the 1989/1990 standard with GNU-specific extensions. How to temporarily change default version of gcc in ArchLinux. In the above command you need to specify old . That cause some problems with different gcc version when I am trying to use some code what I build in my old Ubuntu. To change the default gcc version, just run . To select a default gcc and g++ compiler, we need to configure the alternative options of compilers through the following commands: . Furthermore, I you have a more trusty source than the one presented in the link, please feel free to add it. sudo apt install clang-9 /usr/bin/c++ is actually a symbolic link to: /etc/alternatives/c++ which in turn is also a symbolic link to: /usr/bin/g++ so on Ubuntu c++ is g++ and g++ is g++ explicitly. Well, there are a few options to obtain the GCC version of your Ubuntu. I am using Ubuntu 16.04 LTS . This will provide the symbolic link (softlink) to the default version of GCC. It will bring a prompt similar to this, which lets you pick the version to be used: There are 2 choices for the . Ask Question Asked 4 years, 3 months ago. Viewed 749k times 290 113. The command will create symbolic links to the specific versions of GCC and G++. 2. Execute update-alternatives. . To select a default gcc and g++ compiler, we need to configure the alternative options of compilers through the following commands: . The question Choose gcc and g++ version answers how to do it, but I could not figure out, if it only affects me or also all the other users of the system as I have to use sudo. When you close the terminal you lose the export so to speak. cpp-bin has to be done separately as there exists a "cpp" master alternative. Just type in your terminal. In this tutorial we will install multiple versions of GCC and G++ compilers using the apt install command. Option 1: Run command " gcc -version ". For example, kernel modules should always be compiled with the same version of gcc used to compile the kernel. Disclaimer: I have searched and read similar posts and they do not answer my question. Tool 4.1, the system gcc is 4.8.5 and the gcc used by eclipse is 5.3.1. When completed, you must change to the gcc you want to work with by default. I checked online and have seen people advising to not change default compilers on operating system as it becomes unstable. By default gcc is installed but you may have to install g++ manually: sudo apt-get install g++ I share a server (11.04) with other people and I am the only one who has to use gcc 4-4. Open the terminal window in LINUX and execute the command: $ which gcc. Modified 10 months ago. Enter the number of the version you want to be used as a default and press Enter. Change the softlink to point to the version of GCC that you want to use. Make GNU GCC 10 default compiler - use update-alternatives to point the GNU GCC 10 as the default compiler Four simple lines and the third is a little bit more complex: 1 2 3 4 5 apt update -y apt upgrade -y apt install -y build-essential apt install -y gcc-10 g++-10 cpp-10 Then I switch to the higher version of gcc by executing "source /opt/rh/devtoolset-5/enable". There are two versions installed, python 3.4.3 and python 3.6. With that in mind, if you manually altered the symlink between /usr/bin/gcc and the version used in your version of Ubuntu, future DKMS-built modules might use the wrong gcc version. So I use devtoolset install a higher version of gcc. Type update-alternatives --config gcc to be asked to choose the gcc version you want to use among those installed. 1. To change the default version executed with the gcc command we have to configure the alternatives in the system. The solution needs to work for Makefiles and such. Open terminal and run the following command to check python version in Ubuntu. NOTE: g++ version is changed automatically with a gcc version switch. ), but the default version, the one that is executed with the command gcc, will still be the previous one. If you'll wish to change the default gcc version later on, run sudo update-alternatives --config gcc. I installed gcc 4.8.5 with yum (it's in the /usr subdirectory) in order to build gcc 8.3.0 from source, which is installed at /usr/local if no directory is specified. 2. /usr/bin/gcc is a symbolic link , so unlink it and point it to the version off gcc you wish. Check python version. Navigate to the directory which has this softlink. Downgrading GCC and G++ compilers in Ubuntu is mandatory to build some packages. Install clang version 9 from the default Ubuntu repositories in Ubuntu 19.10 and later. How do I downgrade the version to the default? By default, gcc does not conform to any of the ANSI/ISO C standards. In addition, how can I change the variable CXX in a make file to gcc-3.3? Four simple lines and the third is a little bit more complex: 1. Start by updating the packages list: sudo apt update. export CC=gcc-4.1. To verify if it worked. Install gcc-10 packages (g++, too). Now the different compiler versions are available in the system by using different command names (that is, gcc-5, gcc-6, etc. It also assumes that you have GCC version 4.8.x and Clang version 3.5. … To validate that the GCC compiler is successfully installed, use the gcc -version command which prints the GCC version: gcc -version. Step 1 - Install GCC on Ubuntu. I have python3 installed. Ask Question Asked 4 years, 7 months ago. In this short howto, I will show how to check the GCC version of an Ubuntu system by using different commands. 1) Here, the default Ubuntu repositories have a meta-package as build-essential. update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-3.3 50 --edit-- Finally, you can also use the interactive interface of update-alternatives to easily switch between versions. This should allow any futher command that are run in that terminal and use gcc to use the version exported. 2. Installing GCC on Ubuntu. (The default version of Clang is 3.4.) Compiling code works fine and the OS takes the newer version as the default compiler. With that in mind, if you manually altered the symlink between /usr/bin/gcc and the version used in your version of Ubuntu, future DKMS-built modules might use the wrong gcc version. So my idea is that if I change gcc 4.6 to gcc 4.7 then the same module can compile in the other kernel also. In this tutorial, I will present how to install different versions of GCC & G++ . Install the build-essential package by typing: sudo apt install build-essential. The default version of gcc in centos 6 is 4.9.3. How can I change the default compiler as gcc-3.3? sudo apt install gcc-4.9 g++-4.9 Original: And here is a one-liner for those who are lazy, just change change the number at the end to the version you want. $ sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 10. I tried jw013's idea, but I think I screwed up. Alternate export GCC="gcc-4.1.0" then proceed with ./configure .. make .. make install It will make the change for gcc and/or g++ List available compiler alternatives: root$ update-alternatives --list gcc root$ update-alternatives --list cpp-bin. To set your alternatives, you should have something like this (assuming your gccinstallation is located at /usr/bin/gcc-3.3, and gcc-4.4's priority is less than 50): update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-3.3 50 --edit-- Finally, you can also use the interactive interface of update-alternativesto easily switch between versions. How can I achieve that? There are three steps to install and use GNU GCC 10 under Ubuntu 20.04: Install build-essential package. gcc --version I get the following output: gcc (Ubuntu 5.4.-6ubuntu1~16.04.4) 5.4.0 20160609 which means that my OS doesn't see the newly installed gcc as the default compiler. Make GNU GCC 10 default compiler - use update-alternatives to point the GNU GCC 10 as the default compiler. 2) Firstly, start by updating the packages list: sudo apt update. To select manually version 4.9 of gcc, g++ and cpp, do: So the suggestion is, that in the terminal that you intend to run your command (s) first run. Edit: I'll be more specific, when trying to install Nvidia display driver, I get an error: The kernel was built with gcc version 7.4.0 (Ubuntu 7.4.-1ubuntu~18.04.1), But the current compiler version is cc (ubuntu 7.5.-3ubuntu~18.04) 7.5.0 (Some . For example, kernel modules should always be compiled with the same version of gcc used to compile the kernel. To call gcc-3.3, I have to use the command gcc-3.3. The relevant section of the 4.7.2 manual is here. I already installed gcc 4.4 but how do I make it the default for me, without disturbing the others? Perform the below steps to install GCC Compiler on Ubuntu 20.04. Run the following command to set default python in Ubuntu. It is not accepting c++11 commands and is giving me output saying the command is not c++98 compatible. To restore the original "default" version of gcc we just need to delete that symlink and rehash: . ( your default of 4.3 will remain so. Conclusion We've shown you how to installed GCC on Ubuntu 20.04. Change the Python3 default version in Ubuntu. I use ubuntu 12.04 and the default gcc is 4.6.3. Ubuntu18.04 update the version number of GCC and G ++, Programmer All, we have been working hard to make a technical sharing website that all programmers love. How to change default gcc and g++ version. This document assumes that you have an up-to-date version of Linux Mint 17.x currently running on your system. Regards get info like gcc version 4.4.6 (Ubuntu/Linaro 4.4.6-llubuntu2) Step 2: How about switching to gcc 4.5?Check if you already installed the gcc 4.5 Furthermore, by use of the update-alternatives tool you will learn how to easily switch between multiple GCC and G++ compiler versions and how to check the currently selected compiler version. I check the gcc -v; the kali give me gcc version 6.1.1 20160802(Debian 6.1.1-11) and ubuntu give me gcc version 5.4.0 20160609 (ubuntu 5.4.-6ubuntu1~16.04.2) Downgrading GCC and G++ compilers in Ubuntu is mandatory to build some packages. $ python --version 2.7. In this tutorial, I will present how to install different versions of GCC & G++ . This is explained in depth in the gcc manual, available (if it's installed) by typing info gcc or online here. One common global place in the system by using different command names ( that is executed with the command not! Me output saying the command gcc-3.3 you will be presented with a version. 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