The PostgreSQL™ 12.8 sources can be obtained from the
download section of our
website: https://www.postgresql.org/download/. You
should get a file named postgresql-12.8.tar.gz
or postgresql-12.8.tar.bz2
. After
you have obtained the file, unpack it:
gunzip postgresql-12.8.tar.gz
tar xf postgresql-12.8.tar
(Use bunzip2 instead of gunzip if you
have the .bz2
file.)
This will create a directory
postgresql-12.8
under the current directory
with the PostgreSQL™ sources.
Change into that directory for the rest
of the installation procedure.
You can also get the source directly from the version control repository, see Appendix I.