libtool编译问题??

求助, `利用libtool编译出现问题??

我利用libtool编译程序时出现下面的问题:
*** Warning: Linking the shared library libicenet.la against the
*** static library /usr/local/lib/librtp.a is not portable!

*** Warning: Linking the shared library libicenet.la against the
*** static library /usr/local/lib/librtpunix.a is not portable!
请问各位大侠是什么原因, 怎么解决呢??/