Compiling postgres-7.4.1

hello,
Iam trying to install postgres-7.4.1 on my tru64 (O.S version 5.1A) box
without the shared library support.

Here's my list of commands:
./configure --with-includes=/opt/gcc-33/include --prefix=/tools/postgres-741
--disable-shared
gmake
gmake install

The "gmake" successfully compiles the software but "gmake install" throws
the following error:
/bin/sh ../../../../../../config/install-sh -c -m 755
/tools/postgres-741/lib/ascii_and_mic.so
install: /tools/postgres-741/lib/ascii_and_mic.so does not exist
gmake[3]: *** [install] Error 1
gmake[3]: Leaving directory
`/tools/SW/postgresql-7.4.1/src/backend/utils/mb/conversion_procs/ascii_and_
mic'
gmake[2]: *** [install] Error 2
gmake[2]: Leaving directory
`/tools/SW/postgresql-7.4.1/src/backend/utils/mb/conversion_procs'
gmake[1]: *** [install] Error 2
gmake[1]: Leaving directory `/tools/SW/postgresql-7.4.1/src'
gmake: *** [install] Error 2

Iam not sure why the install program searches for the shared objects.
I have read the INSTALL file but there's nothing mentioned on
"--disable-shared" option in the configure command.
Surprisingly, google also failed to answer my question.

So how will i be able to compile postgres without the shared library support
?

Thanks in advance,
Bala S