copy_autogen tweaks.

* autogen/copy_autogen: Work from ./ or ../.
Fix time-stamps.
* autogen.sh: Doc fix.

ChangeLog

@@ -1,3 +1,9 @@
+2011-03-22  Glenn Morris  <rgm@gnu.org>
+
+	* autogen/copy_autogen: Work from ./ or ../.
+	Fix time-stamps.
+	* autogen.sh: Doc fix.
+
 2011-03-20  Glenn Morris  <rgm@gnu.org>
 
 	* autogen/: New directory, to be excluded from releases.

autogen.sh

@@ -184,7 +184,7 @@ instead of this script.
 If all else fails, you can try using the pre-built versions of the
 generated files by doing:
 
-cd autogen && ./copy_autogen
+./autogen/copy_autogen
 
 This is not recommended - see the comments in \`copy_autogen'.
 

autogen/copy_autogen

@@ -8,12 +8,17 @@
 ## regenerate configure and will fail if you do not have the required
 ## tools.  You will have to run this script again.
 
+test -d autogen && cd autogen
+
 if test ! -e config.in; then
-    echo "You must run this script from the autogen/ directory."
+    echo "Cannot find autogen/ directory."
     exit 1
 fi
 
-cp configure aclocal.m4 ../
+## Order implied by top-level Makefile's rules, for time-stamps.
+cp aclocal.m4 ../
+cp configure ../
+touch ../src/stamp-h.in
 cp config.in ../src/
 cp Makefile.in ../lib/