errors when installing xml-rpc -c-1.06.14 in cygwin

I want to install xml-rpc-c-1.06.14 in cygwin and there are some
errors as follows.  i have successfully installed libwww.
Could some one give me some guidance to resolve them. Great thanks.
value.cpp: In constructor
`xmlrpc_c::value_datetime::value_datetime(const xmlrpc
_c::timeval&)':
value.cpp:384: error: invalid use of undefined type `const struct
xmlrpc_c::time
val'
srcdir/include/xmlrpc-c/base.hpp:123: error: forward declaration of
`const struc
t xmlrpc_c::timeval'
make[2]: *** [value.o] Error 1
make[2]: Leaving directory `/home/Wang/xmlrpc-c-1.06.14/src/cpp'
make[1]: *** [cpp/all] Error 2
make[1]: Leaving directory `/home/Wang/xmlrpc-c-1.06.14/src'
make: *** [src/all] Error 2



 
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