7.3 Beta 1 Build Error on Cygwin

I get the following error when building beta 1 on CYGWIN_NT-5.1 PC9
1.3.10(0.51/3/2) 2002-02-25 11:14 i686 unknown:

make[3]: Entering directory
`/usr/local/src/postgresql-7.3b1/src/backend/utils/mb/conversion_procs/c
yrillic_and_mic'
gcc -O2 -Wall -Wmissing-prototypes -Wmissing-declarations
-I../../../../../../src/include -I/usr/local/include -DBUILDING_DLL=1
-c -o cyrillic_and_mic.o cyrillic_and_mic.c
dlltool --export-all --output-def cyrillic_and_mic.def
cyrillic_and_mic.o
dllwrap -o cyrillic_and_mic.dll --dllname cyrillic_and_mic.dll --def
cyrillic_and_mic.def cyrillic_and_mic.o
../../../../../../src/utils/dllinit.o -lcygipc -lcrypt -L/usr/local/lib
-L../../../../../../src/backend -lpostgres
Warning: resolving _CurrentMemoryContext by linking to
__imp__CurrentMemoryContext (auto-import)
fu000001.o(.idata$3+0xc): undefined reference to `libpostgres_a_iname'
fu000002.o(.idata$3+0xc): undefined reference to `libpostgres_a_iname'
fu000003.o(.idata$3+0xc): undefined reference to `libpostgres_a_iname'
fu000004.o(.idata$3+0xc): undefined reference to `libpostgres_a_iname'
fu000005.o(.idata$3+0xc): undefined reference to `libpostgres_a_iname'
fu000006.o(.idata$3+0xc): more undefined references to
`libpostgres_a_iname' follow
nmth000000.o(.idata$4+0x0): undefined reference to
`_nm__CurrentMemoryContext'
collect2: ld returned 1 exit status
dllwrap: gcc exited with status 1
make[3]: *** [cyrillic_and_mic.dll] Error 1
make[3]: Leaving directory
`/usr/local/src/postgresql-7.3b1/src/backend/utils/mb
/conversion_procs/cyrillic_and_mic'
make[2]: *** [all] Error 2
make[2]: Leaving directory
`/usr/local/src/postgresql-7.3b1/src/backend/utils/mb
/conversion_procs'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/usr/local/src/postgresql-7.3b1/src'
make: *** [all] Error 2
PC9 $

Regards, Dave