BUG #2668: The config dir was empty -> cannot find install-sh or install.sh in config ./config

The following bug has been logged online:

Bug reference: 2668
Logged by: Bill Hernandez
Email address: ms(at)mac-specialist(dot)com
PostgreSQL version: 8.1.4
Operating system: OS X 10.4.7
Description: The config dir was empty -> cannot find install-sh or
install.sh in config ./config
Details:

server-apache:/usr/local/src/postgresql-8.1.4 username$ ./configure
--prefix=/usr/local/pgsql/
configure: error: cannot find install-sh or install.sh in config ./config

I copied the contents of the config dir from the v8.0.3 source that I still
had in my /src folder, and tried running ./confure with that. configure
seemed to work fine but then I got the following

server-apache:/usr/local/src/postgresql-8.1.4 username$ make
make -C doc all
make[1]: *** No rule to make target `all'. Stop.
make: *** [all] Error 2

I downloaded
-rw-r--r-- 1 (?) pgsql 11609501 May 22 00:38
postgresql-8.1.4.tar.bz2

server-apache:/usr/local/src/postgresql-8.1.4 username$ cd config
server-apache:/usr/local/src/postgresql-8.1.4/config username$ ls -ls
THE CONFIG DIR WAS EMPTY