Linux System - Table 12 > Packages - Table 1 & 2 > m4

\"A GNU implementation of the traditional UNIX macro processor. M4 isuseful for writing text files which can be logically parsed, and isused by many programs as part of their build process. M4 has built-infunctions for including files, running shell commands, doingarithmetic, etc. The autoconf program needs m4 for generating configurescripts, but not for running configure scripts. Install m4 if you needa macro processor.\"