(redirected from Unslung.M4)
M4 is "An implementation of the traditional UNIX macro processor in that it copies its input to the output, expanding macros as it goes. Macros are either built-in or user-defined and can take any number of arguments. M4 also has built-in functions for including named files, running UNIX commands, doing integer arithmetic, manipulating text in various ways, and recursions." (from http://directory.fsf.org/gnum4.html ; the gnu m4 home page may be found at http://www.gnu.org/software/m4/m4.html).
If you're not compiling natively on the slug, you probably don't need this.
M4, make, and patch should really be made the same package.