How to Downgrade Gcc In Debian Linux?

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If you want to downgrade GCC (GNU Compiler Collection) in Debian Linux, you can follow these steps:

  1. First, check the available versions of GCC that can be installed on your Debian system by running the command: apt-cache policy gcc This command will display the installed version as well as the available versions of GCC.
  2. To downgrade GCC to a specific version, you need to add the appropriate APT repository to your system. To do this, open the sources.list file using a text editor: sudo nano /etc/apt/sources.list
  3. Uncomment the deb-src line that corresponds to the Debian version you are using. For example, if you are using Debian 10 (Buster), uncomment the following line: deb-src http://deb.debian.org/debian buster main
  4. Save the file and exit the text editor.
  5. Update the APT package lists by running the following command: sudo apt update
  6. Install the necessary build dependencies by running the command: sudo apt build-dep gcc
  7. Download the source code of the desired GCC version by running the command: apt source gcc=Replace with the version number you want to downgrade to. For example, if you want to downgrade to version 8.3.0, the command would be: apt source gcc=8.3.0
  8. Change to the GCC source code directory by using the cd command. The directory will typically have a name like gcc-: cd gcc-
  9. Compile and build GCC by running the following commands: ./configure make sudo make install The compilation process may take some time to complete.
  10. Once the installation is done, you can verify the version of GCC by running the command: gcc --version


The output should show the downgraded version you installed.


Please note that downgrading system components can have implications on compatibility and stability. It is recommended to thoroughly test your system after downgrading GCC to ensure everything works as expected.

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Any potential risks or drawbacks associated with downgrading gcc?

Yes, downgrading gcc (GNU Compiler Collection) may have certain risks or drawbacks, including:

  1. Compatibility issues: Downgrading gcc can lead to compatibility problems with newer software or libraries that may rely on features introduced in the newer versions of gcc. It may cause unexpected errors or incompatibilities, making the software or system unusable.
  2. Security vulnerabilities: Older versions of gcc may contain known security vulnerabilities that have been patched in newer releases. Using a downgraded version could expose your system to potential security risks and attacks.
  3. Lack of bug fixes and optimizations: Newer versions of gcc often include bug fixes, performance improvements, and optimizations. By downgrading, you may miss out on these enhancements, resulting in decreased performance, stability issues, or unresolved bugs.
  4. Limited language support: Older gcc versions may have limited or obsolete language support, lacking features and updates for modern programming languages. This can affect your ability to compile and run code written using newer language constructs.
  5. Limited hardware support: The latest gcc versions usually include support for new processors, instruction sets, and hardware features. Downgrading gcc means losing out on these advancements and potentially not being able to take full advantage of your hardware capabilities.
  6. Decreased community support: As newer versions of gcc are more widely used, the developer community tends to focus on supporting them. Finding help, documentation, and community support for older versions can be more challenging.


It is generally recommended to use the latest stable version of gcc unless there are specific compatibility requirements or other compelling reasons to downgrade.


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