This is the GNU Pascal compiler, which compiles Pascal on platforms supported by the gcc compiler. It uses the gcc backend to generate optimized code.
gpc-4.1-doc | Documentation for the GNU Pascal compiler (gpc) | Mehr ...
Documentation for the GNU Pascal compiler in info format. . WARNING: the integration of gpc into gcc-4.x is still in an experimental stage. For production use, please use gpc or gpc-2.1-3.4.