acinstall is a script that installs aclocal-style M4 files. aclocal generates aclocal.m4 files based on the contents of configure.in files. automake is a tool for automatically generating Makefile.in's from files called Makefile.am. To create all the Makefile.in files for a package, run this program in the top level directory. By scanning the configure.ins it automatically finds each appropriate Makefile.am and generate the corresponding Makefile.in. compile is a wrapper for compilers. config.guess is a script that attempts to guess the canonical triplet for the given build, host, or target architecture. config.sub is a configuration validation subroutine script. depcomp is a script for compiling a program so that not only the desired output is generated but also dependency information. elisp-comp byte-compiles Emacs Lisp code. install-sh is a script that installs a program, a script, or a datafile. mdate-sh is a script that prints the modification time of a file or directory. missing is a script acting as a common stub for missing GNU programs during an installation. mkinstalldirs is a script that creates a directory tree. py-compile compiles a Python program. symlink-tree is a script to create a symlink tree of a directory tree. ylwrap is a wrapper for lex and yacc.