(automake.info) Extending aclocal
Writing your own aclocal macros
The `aclocal' program doesn't have any built-in knowledge of any
macros, so it is easy to extend it with your own macros.
This is mostly used for libraries which want to supply their own
Autoconf macros for use by other programs. For instance the `gettext'
library supplies a macro `AM_GNU_GETTEXT' which should be used by any
package using `gettext'. When the library is installed, it installs
this macro so that `aclocal' will find it.
A file of macros should be a series of `AC_DEFUN''s. The `aclocal'
programs also understands `AC_REQUIRE', so it is safe to put each macro
in a separate file. Prerequisite Macros (autoconf)Prerequisite
Macros, and Macro Definitions (autoconf)Macro Definitions.
A macro file's name should end in `.m4'. Such files should be
installed in `$(datadir)/aclocal'.
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