On Thu, Oct 30, 2003 at 02:49:12PM +0000, David Laight wrote:
  | I've just dug deeper into this morass...
  | 
  | Posix http://www.opengroup.org/onlinepubs/007904975/utilities/pwd.html
  | requires that pwd (whether a shell builtin, or the command) default
  | to 'pwd -L' and hence assume that $PWD is correct and that you can
  | use ".." to travervse backwards over a symlink.
  | 
  | This is contrary to historical practise for everything except ksh!
  | 
  | The shell ought also support 'cd -L' and 'cd -P', the current 'cd'
  | builtin is actually a hybrid of the two.
  | Again the default is the ksh semantics.
  | 
  | The shell could be made conformant by adding a 'set -o physical' option
  | (as is done in pdksh).

Thanks for the background.

In any case, build.sh will be changed to unconditionally run
	TOP=$(/bin/pwd -P)

Luke.