Change BUGS to not mention a non-bug

[Paul Eggert]

Since we're now documenting VPATH as being tricky with proprietary 'make'
it's time to stop listing it in BUGS.  Also, we should cross-reference
this from the 'Build Directories' section.  I installed this.

2006-12-10  Paul Eggert  <address@hidden>

        * BUGS: Remove mention of VPATH problem, since it's now documented
        not to be a bug in the Autoconf build procedure itself, but rather
        a problem with the proprietary `make' programs.

        * doc/autoconf.texi (Build Directories): Add a cross reference
        to VPATH and Make.

Index: doc/autoconf.texi
===================================================================
RCS file: /cvsroot/autoconf/autoconf/doc/autoconf.texi,v
retrieving revision 1.1115
diff -u -r1.1115 autoconf.texi
--- doc/autoconf.texi   6 Dec 2006 13:08:02 -0000       1.1115
+++ doc/autoconf.texi   11 Dec 2006 06:39:39 -0000
@@ -2785,7 +2785,9 @@

 To support doing this, @command{make} uses the @code{VPATH} variable to
 find the files that are in the source directory.  @acronym{GNU} Make
-and most other recent @command{make} programs can do this.  Older
+can do this.  Most other recent @command{make} programs can do this as
+well, though they may have difficulties and it is often simpler to
+recommend @acronym{GNU} @command{make} (@pxref{VPATH and Make}).  Older
 @command{make} programs do not support @code{VPATH}; when using them, the
 source code must be in the same directory as the object files.

--- BUGS        14 May 2005 07:00:38 -0000      1.26
+++ BUGS        11 Dec 2006 06:39:38 -0000
@@ -3,7 +3,7 @@
 This file lists the bugs you must be aware of.  Be sure to check this
 file before using Autoconf, and especially CVS versions of Autoconf.

-       Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
+       Copyright (C) 2000, 2001, 2002, 2006 Free Software Foundation, Inc.

        This file is part of GNU Autoconf.

@@ -36,8 +36,4 @@

 * Minor Problems

-Some Makefile segments do not behave correctly in VPATH builds with proprietary
-`make' programs.  Some BSD `make's will work.  For best results, build in the
-source directory or use GNU `make'.
-
 Parallel builds via `make -jN' do not work.