On Wed, Dec 04, 2002 at 11:52:27PM +1100, Luke Mewburn wrote:
  | On Wed, Dec 04, 2002 at 12:44:44PM +0000, David Laight wrote:
  |   | I 'fixed' the source files and Makefiles to make the code I had
  |   | compile.  My ISP was dead at the time the build failed, so I couldn't
  |   | see what changes had caused the problem.
  |   | 
  |   | I didn't try deleting the obj/tools directory (usually needed
  |   | after a kernel version change).
  | 
  | ISTM that the autoconf cache should probably be invalidated if the
  | configure script or config.h.in is newer.
  | 
  | (I don't know that will cause too many reconfigure-s though).

I made this change locally, it works as expected, so I've committed it.

Now, if configure or config.h.in changes, config.cache is removed
before rerunning configure.  This should prevent the specific problem
that you saw with UPDATE=1.

Luke.