since they always need a C compiler, even when the source code is
completely in C++.
For some other packages, stated in the comment that a C compiler is
really not needed.
development platform for PostgreSQL, the most advanced Open Source database in
the world. The application may be used on BSD, Linux, Solaris, Mac OSX and
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Sockets (on *nix platforms), and may be SSL encrypted for security. No
additional drivers are required to communicate with the database server.
