m4 src 43a015caa59a7fda0969a600d8184ae27b708cb3abeffd822c26d8f8e0f85930 The GNU macro processor A GNU implementation of the traditional UNIX macro processor. M4 is useful for writing text files which can be logically parsed, and is used by many programs as part of their build process. M4 has built-in functions for including files, running shell commands, doing arithmetic, etc. The autoconf program needs m4 for generating configure scripts, but not for running configure scripts. m4 is most likely needed if you want to compile or develop software. bero <bero@lindev.ch> https://www.gnu.org/software/m4/