By default Automake tries to make a symbolic link pointing to its own
copy of the missing file; this can be changed with @code{--copy}.
+Many of the potentially-missing files are common scripts whose
+location may be specified via the @code{AC_CONFIG_AUX_DIR} macro.
+Therefore, @code{AC_CONFIG_AUX_DIR}'s setting affects whether a
+file is considered missing, and where the missing file is added
+(@pxref{Optional}).
+
@item --libdir=@var{dir}
@opindex --libdir
Look for Automake data files in directory @var{dir} instead of in the
@item AC_CONFIG_AUX_DIR
Automake will look for various helper scripts, such as
@file{mkinstalldirs}, in the directory named in this macro invocation.
-If not seen, the scripts are looked for in their @samp{standard}
-locations (either the top source directory, or in the source directory
-corresponding to the current @file{Makefile.am}, whichever is
-appropriate). @xref{Input, , Finding `configure' Input, autoconf, The
-Autoconf Manual}.
+@c This list is accurate relative to version 1.7.2
+(The full list of scripts is: @file{config.guess}, @file{config.sub},
+@file{depcomp}, @file{elisp-comp}, @file{compile}, @file{install-sh},
+@file{ltmain.sh}, @file{mdate-sh}, @file{missing}, @file{mkinstalldirs},
+@file{py-compile}, @file{texinfo.tex}, and @file{ylwrap}.) Not all
+scripts are always searched for; some scripts will only be sought if the
+generated @file{Makefile.in} requires them.
@cvindex AC_CONFIG_AUX_DIR
-@c FIXME: give complete list of things looked for in this directory
+
+If @code{AC_CONFIG_AUX_DIR} is not given, the scripts are looked for in
+their @samp{standard} locations. For @file{mdate-sh},
+@file{texinfo.tex}, and @file{ylwrap}, the standard location is the
+source directory corresponding to the current @file{Makefile.am}. For
+the rest, the standard location is the first one of @file{.}, @file{..},
+or @file{../..} (relative to the top source directory) that provides any
+one of the helper scripts. @xref{Input, , Finding `configure' Input,
+autoconf, The Autoconf Manual}.
@item AC_CANONICAL_HOST
Automake will ensure that @file{config.guess} and @file{config.sub}