[Development] rebuild Qt 5 on Mac OS

[Chris Meyer]

I'm rebuilding Qt 5 from source on Mac OS.

I did

git pull
git submodule update --recursive
make

I get an error:

make[4]: *** No rule to make target
`inspector/InspectorWebGLAgent.cpp', needed by
`obj/debug/inspector/InspectorAllInOne.o'.  Stop.
make[3]: *** [debug-all] Error 2
make[2]: *** [sub-Target-pri-make_first-ordered] Error 2
make[1]: *** [sub-Source-WebCore-WebCore-pro-make_first-ordered] Error 2
make: *** [module-qtwebkit-make_first] Error 2

I'm guessing there is something equivalent to 'syncqt' to run in 5.0
-- however when I run

qtbase/bin/syncqt `pwd`

from the top level directory, I get:

Could not find a sync.profile...

What am I doing wrong?