Problems compiling from source

Hi all,

I have installed version 8.2.1 and downloaded the source tree in order to compile a number of C-functions.

I have been compiling from source for contrib files and c-functions since version 7.3 without problem.

I downloaded postgresql-base-8.2.1.tar.gz and unzipped it into the PostgreSQL Program Files directory.

I ran configure without problem, but when I run make I get the following error:

$ make
make -C doc all
make[1]: Entering directory `/c/Program Files/PostgreSQL/postgresql-8.2.1/doc'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory `/c/Program Files/PostgreSQL/postgresql-8.2.1/doc'
make -C src all
make[1]: Entering directory `/c/Program Files/PostgreSQL/postgresql-8.2.1/src'
make -C port all
make[2]: Entering directory `/c/Program Files/PostgreSQL/postgresql-8.2.1/src/port'
gcc -O2 -Wall -Wmissing-prototypes -Wpointer-arith -Winline -fno-strict-aliasing -I../../src/port -DFRONTEND -I../../src/include - I./src/include/port/win32 -DEXEC_BACKEND -c -o crypt.o crypt.c
In file included from ../../src/include/c.h:826,
from crypt.c:44:
../../src/include/port.h:17:19: netdb.h: No such file or directory
../../src/include/port.h:18:17: pwd.h: No such file or directory
../../src/include/port.h:333:24: netinet/in.h: No such file or directory
../../src/include/port.h:334:23: arpa/inet.h: No such file or directory
make[2]: *** [crypt.o] Error 1
make[2]: Leaving directory `/c/Program Files/PostgreSQL/postgresql-8.2.1/src/port'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/c/Program Files/PostgreSQL/postgresql-8.2.1/src'
make: *** [all] Error 2

The files that cannot be found are in the source tree.

Ths has me stumped.

Am I forgetting something obvious??

Thanks,
George