Directions for installing Glish can be found in the file README at the top level of the Glish distribution (i.e., at the some level as the glish/ source directory).
The basic requirements for installing and/or porting Glish are a C++ compiler and access to sockets as provided by the socket(), bind(), accept(), and connect() system calls. Those system dependencies of which we are aware have been isolated in the (C, not C++) source file system.c; its companion header file, system.h, provides brief documentation as to what each function is expected to do.