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Automake includes a number of Autoconf macros which can be used in your
package; some of them are actually required by Automake in certain
situations. These macros must be defined in your `aclocal.m4';
otherwise they will not be seen by
aclocal program will automatically generate `aclocal.m4'
files based on the contents of `configure.in'. This provides a
convenient way to get Automake-provided macros, without having to
search around. Also, the
aclocal mechanism allows other packages
to supply their own macros.
aclocal scans all the `.m4' files it can find,
looking for macro definitions (see section 5.5 Macro search path). Then it
scans `configure.in'. Any
mention of one of the macros found in the first step causes that macro,
and any macros it in turn requires, to be put into `aclocal.m4'.
The contents of `acinclude.m4', if it exists, are also automatically included in `aclocal.m4'. This is useful for incorporating local macros into `configure'.
aclocal tries to be smart about looking for new
in the files it scans. It also
tries to copy the full text of the scanned file into `aclocal.m4',
including both `#' and `dnl' comments. If you want to make a
comment which will be completely ignored by
`##' as the comment leader.
5.4 aclocal options Options supported by aclocal 5.5 Macro search path How aclocal finds .m4 files
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