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.
See http://parchive.sourceforge.net for details of PAR 2.0 specification
and discussion of all things PAR.
WHAT EXACTLY IS PAR2CMDLINE?
par2cmdline is a program for creating and using PAR2 files to detect
damage in data files and repair them if necessary. It can be used with
any kind of file.