cygwin + postgres 7.1 + tcl support

Hi, all

Somehow, I can not compile postgres 7.1 with tcl support using cygwin.
I am getting the below error messages:

--
dlltool --export-all --output-def pgtcl.def pgtcl.o pgtclCmds.o pgtclId.o
dllwrap -o pgtcl.dll --dllname pgtcl.dll --def pgtcl.def pgtcl.o pgtclCmds.o
pgt
clId.o
../../../src/utils/dllinit.o  -lcygipc -lcrypt -L../../../src/interfaces/
libpq -lpq -L/usr/lib -L/usr/local/lib -lcrypt
pgtcl.o(.text+0xf9):pgtcl.c: undefined reference to `Tcl_CreateCommand'
pgtcl.o(.text+0x113):pgtcl.c: undefined reference to `Tcl_CreateCommand'
pgtcl.o(.text+0x12d):pgtcl.c: undefined reference to `Tcl_CreateCommand'
...

I would appreciate if somebody can point how to compile postgres 7.1 with
tcl
using cygwin.

Thanks,
Jae