title: Undefined reference to isfinite
body: <p>I had following error when done cross compilation for android. </p>
  
  <pre><code>Cross compiler used SDK/prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.7/bin/arm-linux-androideabi' 
  ./libgpsd.a(libgpsd_core.o):libgpsd_core.c:function gpsd_poll: error: undefined reference to '__isfinite'
  ./libgpsd.a(libgpsd_core.o):libgpsd_core.c:function gpsd_poll: error: undefined reference to '__isfinite'
  ./libgpsd.a(libgpsd_core.o):libgpsd_core.c:function gpsd_poll: error: undefined reference to '__isfinite'
  ./libgpsd.a(libgpsd_core.o):libgpsd_core.c:function gpsd_poll: error: undefined reference to '__isfinite'
  </code></pre>