Compilation of contrib of postgresql 7.1.2 with cygwin 1.3.2

Hi

I have a problem with the compilation of array contrib in postgresql with
cygwin 1.3.2
some reference like pg_detoast_datum are undefined !

gcc -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I.
-I../../src/include -I/usr/local/include -c -o array_iterator.o
array_iterator.c
dlltool --export-all --output-def array_iterator.def array_iterator.o
dllwrap -o array_iterator.dll --def array_iterator.def array_iterator.o
../../src/utils/dllinit.o -lcygipc -lcrypt
array_iterator.o(.text+0x49):array_iterator.c: undefined reference to
`pg_detoast_datum'
array_iterator.o(.text+0x5b):array_iterator.c: undefined reference to
`ArrayGetNItems'
array_iterator.o(.text+0x7f):array_iterator.c: undefined reference to
`get_typlenbyval'
array_iterator.o(.text+0x8c):array_iterator.c: undefined reference to
`fmgr_info'
array_iterator.o(.text+0xa9):array_iterator.c: undefined reference to `elog'
array_iterator.o(.text+0x116):array_iterator.c: undefined reference to
`FunctionCall2'
collect2: ld returned 1 exit status
dllwrap: gcc exited with status 1
make: *** [array_iterator.dll] Error 1
rm array_iterator.o