Im trying to install postgresql 9.4 (because of BDR support) on Ubuntu 18.04, and following this building tutorial.
but when im install some dependencies for postgres, its error
root@ubuntu:/home/ubuntu# sudo apt-get build-dep postgresql-9.4 Reading package lists... Done Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: builddeps:postgresql-9.4 : Depends: openjade but it is not installable Depends: docbook-dsssl but it is not installable Depends: docbook-xml but it is not installable Depends: docbook-xsl but it is not installable Depends: docbook but it is not installable Depends: opensp but it is not installable E: Unable to correct problems, you have held broken packages.
its is possible to install postgresql 9.4 on ubuntu 18.04? thank you.