build android framework.jar only
<p>Having add some debug information to <code>androd.opengl.GLSurfaceView</code> , I want to rebuild  the <code>framework.jar</code> <code>only</code> in the android source tree. I did a <code>mm</code> in $ANDROID_ROOT but that would build the apps as well and some apps failed to compile but I did not bother with the apps.How could I build the <code>framework.jar</code> only?</p>

<p>Furthermore, in the <code>build/core/main.mk</code>,<code>incrementaljavac</code> was said to be able to speed up the compilation. How that flag could be used here?</p>

<p>Thanks.</p>
