LGPLv2+ and LGPLv2+ with exceptions and GPLv2+ and GPLv2+ with exceptions and BSD and Inner-Net-2.0 and ISC and Public Domain and GFDL-1.3-only
The programs needed to create and run a PostgreSQL server
PostgreSQL is an advanced Object-Relational database management system (DBMS). The postgresql-server package contains the programs needed to create and run a PostgreSQL server, which will in turn allow you to create and maintain PostgreSQL databases.
acquired package info from repodata DB: repodata/4f04dd9a5e19220326551d04bc181f4c5cab5fd4e2e49b2b0547ede9bfbf41fd-primary.sqlite.bz2
The GNU C Library project provides the core libraries for the GNU system and GNU/Linux systems, as well as many other systems that use Linux as the kernel. These libraries provide critical APIs including ISO C11, POSIX.1-2008, BSD, OS-specific APIs and more. These APIs include such foundational facilities as open, read, write, malloc, printf, getaddrinfo, dlopen, pthread_create, crypt, login, exit and more.
The Tcl procedural language for PostgreSQL
The postgresql-pltcl package contains the PL/Tcl procedural language, which is an extension to the PostgreSQL database server. Install this if you want to write database functions in Tcl.