How to install multiple versions of GCC and G on Ubuntu 20.04

Installing multiple GCC compiler versions on Ubuntu 20.04 LTS

installing GCC-7 GCC-8. ...
install GCC -9 repository. ...
Install GCC-9 on Ubuntu 20.04. ...
Install G++ Compilers. ...
Create a List of GCC and G++ alternatives. ...
Set your default GCC compiler. ...
Select the Default G++ Compiler. ...
Run the G++ and GCC version command.

How do I change GCC version in Ubuntu?
How do I install the latest version of GCC Ubuntu?
How do I change GCC version in Linux?
How do I use old GCC?
How do I switch between GCC versions?
How do I check my GCC version?
Is GCC installed on Ubuntu?
What is the current version of GCC?
Where is gcc installed on Ubuntu?
How do I change my default GCC?
How do I export a GCC path?
What is clang vs GCC?

How do I change GCC version in Ubuntu?

This blog can teach you how to switch your system gcc/g++ version in ubuntu system.

Step 1: Check your current gcc/g++ gcc -v. ...
Step 2: How about switching to gcc 4.5 ? Check if you already installed the gcc 4.5. ...
Step 3: Install gcc 4.5 and g++ 4.5. ...
Step 4: Config your gcc/g++ version.

How do I install the latest version of GCC Ubuntu?

Installing GCC on Ubuntu

Start by updating the packages list: sudo apt update.
Install the build-essential package by typing: sudo apt install build-essential. ...
To validate that the GCC compiler is successfully installed, use the gcc --version command which prints the GCC version: gcc --version.

How do I change GCC version in Linux?

Type update-alternatives --config gcc to be asked to choose the gcc version you want to use among those installed. (Note the use of cpp-bin instead of just cpp . Ubuntu already has a cpp alternative with a master link of /lib/cpp . Renaming that link would remove the /lib/cpp link, which could break scripts.)

How do I use old GCC?

2 Answers

Update the available package information and install GCC 6.3. sudo apt update sudo apt install gcc-6.
Add GCC 6 as an alternative for GCC. ...
Once you're done with "making", you can remove the installed GCC 6.3 and the repository information of Zesty. ...
Fix the symlink for /usr/bin/gcc .

How do I switch between GCC versions?

Installing multiple GCC compiler versions on Ubuntu 20.04 LTS

installing GCC-7 GCC-8. ...
install GCC -9 repository. ...
Install GCC-9 on Ubuntu 20.04. ...
Install G++ Compilers. ...
Create a List of GCC and G++ alternatives. ...
Set your default GCC compiler. ...
Select the Default G++ Compiler. ...
Run the G++ and GCC version command.

How do I check my GCC version?

How to Check gcc Version on Ubuntu

Question : How to check gcc version on my Ubuntu ?
Answer : gcc – GNU project C and C++ compiler. There are a few options to obtain GCC version in Ubuntu.
Option 1. Issue command “gcc –version” Example : ...
Option 2. Issue command “gcc -v” ...
Option 3. Issue command “aptitude show gcc”

Is GCC installed on Ubuntu?

The gcc package is installed by default on all Ubuntu desktop flavors.

What is the current version of GCC?

The GNU Compiler Collection (GCC) 10.1 was released in May 2020. Like every other GCC release, this version brought many additions, improvements, bug fixes, and new features. Fedora 32 already ships GCC 10 as the system compiler, but it's also possible to try GCC 10 on other platforms (see godbolt.org, for example).

Where is gcc installed on Ubuntu?

You need to use the which command to locate c compiler binary called gcc. Usually, it is installed in /usr/bin directory.

How do I change my default GCC?

Direct link to this answer

Open the terminal window in LINUX and execute the command:
$ which gcc.
This will provide the symbolic link (softlink) to the default version of GCC.
Navigate to the directory which has this softlink.
Change the softlink to point to the version of GCC that you want to use.

How do I export a GCC path?

cmake -D CMAKE_C_COMPILER=/path/to/gcc/bin/gcc -D CMAKE_CXX_COMPILER=/path/to/gcc/bin/g++ . Export should be specific about which version of GCC/G++ to use, because if user had multiple compiler version, it would not compile successfully.

What is clang vs GCC?

GCC is a program language compiler developed by GNU. It is a set of free software released under the GNU General Public License (GPL) and GNU Lesser General Public License (LGPL). ... Clang is a C, C++, Objective-C, or Objective-C++ compiler that is compiled in C++ based on LLVM and released under the Apache 2.0 license.