static lib with qwt-6.1-rc3 has an issue

[jesse_mark]

im trying to bulid a static library for qwt-6.1-rc3,
when i disable the #QWT_CONFIG += QwtDll

the library qwt.a is built, but when i use it, the compiler complain and i get errors :

qwt_symbol.cpp:-1: error: undefined reference to `QSvgRenderer::viewBoxF() const'

but when i use the shared library it works fine.
so how can i fix that ?? or what else i need to do to build a static library in qwt ??

thanks