gawk is Free Software, the source code is always available.
gawk Distribution describes how to get and build the formal,
released versions of
However, if you want to modify
gawk and contribute back your
changes, you will probably wish to work with the development version.
To do so, you will need to access the
gawk source code
repository. The code is maintained using the
Git distributed version control system.
You will need to install it if your system doesn’t have it.
Once you have done so, use the command:
git clone git://git.savannah.gnu.org/gawk.git
This clones the
gawk repository. If you are behind a
firewall that does not allow you to use the Git native protocol, you
can still access the repository using:
git clone https://git.savannah.gnu.org/r/gawk.git
Once you have made changes, you can use ‘git diff’ to produce a
patch, and send that to the
gawk maintainer; see Reporting Problems and Bugs,
for how to do that.
Once upon a time there was Git–CVS gateway for use by people who could not install Git. However, this gateway no longer works, so you may have better luck using a more modern version control system like Bazaar, that has a Git plug-in for working with Git repositories.