:After I added the missing SDKs I was still unable to compile and I would get the same build error message over and over again.  ::'''Missing QuickTime SDK'''{| class="fullwidth-table"|-|class="header" width="6%"||class="header" width="94%"||- |- ||<pre>ld: Undefined symbols:_fprintf$LDBLStubmake[7]: *** [updater] Error 1make[6]: *** [libs] Error 2make[5]: *** [libs] Error 2make[4]: *** [libs] Error 2make[3]: *** [libs] Error 2make[2]: *** [tier_50] Error 2make[1]: *** [default] Error 2make: *** [build] Error 2</pre>|-|}  After many build attempts I realized that the old object files that were compiled before, when I was missing the SDKs, were causing the build process to fail. The removal of the object files with in the objdir resulted it a successful build of Firefox.