error when running make

I'm getting the following error when I run the make command on Windows2000:

...
pg_passwd.o(.text+0x763):pg_passwd.c:undefined reference to 'crypt'
collect2: ld returned 1 exit status
make[3]: ***[pg_passwd] Error 1
make[3]: ***leaving directory '/usr/src/postgresql-7.2/src/bin/pg_passwd'
make[2]: ***[all] Error 2
make[2]: ***leaving directory '/usr/src/postgresql-7.2/src/bin'
make[1]: ***leaving directory '/usr/src/postgresql-7.2/src'
make: ***[all] Error 2

./configure completed successfully, and the crypt lib is installed. I tried
uninstalling and reinstalling the crypt lib and still get the same error. 

Anybody know what might be causing this error?

Thanks