PATCH: allow another subdirectory level from toplevel

[Kelley Cook]

Hello,

In the combined tree there are directories like ./winsup/mingw/mingwex 
are three levels removed from the toplevel yet do have configure.in.  
Autoconf's AC_CONFIG_AUX_DIRS currently only look's two directories 
underneath to check for install.sh to discover the toplevel.  This tiny 
patch allows it to look three levels beneath.

I am also sending the obvious followup patch to m4/auxdir.m4 to the 
automake list so the aclocal.m4 comments about AC_CONFIG_AUX_DIRSget 
updated with this new functionality.

Kelley Cook

2003-05-30  Kelley Cook  <address@hidden>

        * lib/autoconf/general.m4 (AC_CONFIG_AUX_DIR_DEFAULT): Allow
        $srcdir/../../.. also.
        * doc/autoconf.texi: Document it.

diff -ur autoconf-2.57.orig/doc/autoconf.texi autoconf-2.57/doc/autoconf.texi
--- autoconf-2.57.orig/doc/autoconf.texi        2002-12-03 02:16:32.000000000 
-0500
+++ autoconf-2.57/doc/autoconf.texi     2003-05-30 09:07:50.000000000 -0400
@@ -1647,8 +1647,8 @@
 Automake and Libtool scripts etc.) that are in directory @var{dir}.
 These are auxiliary files used in configuration.  @var{dir} can be
 either absolute or relative to @address@hidden  The default is
address@hidden@var{srcdir}} or @address@hidden/..} or
address@hidden@var{srcdir}/../..}, whichever is the first that contains
address@hidden@var{srcdir}}, @address@hidden/..}, @address@hidden/../..},
+or @address@hidden/../../..} whichever is the first that contains
 @file{install-sh}.  The other files are not checked for, so that using
 @code{AC_PROG_INSTALL} does not automatically require distributing the
 other auxiliary files.  It checks for @file{install.sh} also, but that
diff -ur autoconf-2.57.orig/lib/autoconf/general.m4 
autoconf-2.57/lib/autoconf/general.m4
--- autoconf-2.57.orig/lib/autoconf/general.m4  2002-11-12 05:54:46.000000000 
-0500
+++ autoconf-2.57/lib/autoconf/general.m4       2003-05-30 09:07:51.000000000 
-0400
@@ -1545,10 +1545,11 @@
 
 # AC_CONFIG_AUX_DIR_DEFAULT
 # -------------------------
-# The default is `$srcdir' or `$srcdir/..' or `$srcdir/../..'.
+# The default is `$srcdir' or `$srcdir/..' or `$srcdir/../..' 
+# or `$srcdir/../../..'.
 # There's no need to call this macro explicitly; just AC_REQUIRE it.
 AC_DEFUN([AC_CONFIG_AUX_DIR_DEFAULT],
-[AC_CONFIG_AUX_DIRS($srcdir $srcdir/.. $srcdir/../..)])
+[AC_CONFIG_AUX_DIRS($srcdir $srcdir/.. $srcdir/../.. $srcdir/../../..)])
 
 
 # AC_CONFIG_AUX_DIRS(DIR ...)