nanogui: Thread: using viewml on microwindow

Hi,
I want to compile the viewml using on microwindow, but there are lots of
multiple
definition errors when it comes to link all the .o files with include
'/usr/local/bin/libwww-config --libs'

the error looks like this:

/usr/local/lib/libwwwxml.so:In function 'HTXMLCallback_registerNew':
/home/victor/develop/microwin/w3c-libwww-5.3.2/Library/src/HTXML.c:232:multiple
definition fo '_DYNAMIC'
/data/lart/cross/arm-linux/lib/libpthread.so(.dynamic+0x0):first defined
here


...... and a lot more of the simular multiple definition errors on 
_init, _fini, .....

can you help me out here?

thanks