In Linux platforms, aclocal command is used for generating aclocal.m4 files from configure.in file. This command when executed, scans the macro definitions in .m4 files in default directory path at /usr/share/aclocal, and also within a file named acinclude.m4. Later, it also scans for the macros used in configure.in file, after which the command generates an acloal.m4 file that includes definitions of all m4 macros.

Syntax:

aclocal [, OPTION/]… [, SRCDIR/]