gpp - 2.25-1 main

GPP is a general-purpose preprocessor with customizable syntax, suitable for
a wide range of preprocessing tasks. Its independence from any one
programming language makes it much more versatile than the C preprocessor
(cpp), while its syntax is lighter and more flexible than that of GNU m4.
There are built-in macros for use with C/C++, LaTeX, HTML, XHTML, and Prolog
files.