I read in a NEC summary that a 6 cubic inch pancake box is "only good
for the end of a 14/2 run", i.e., no outgoing 14/2 allowed. But I
also read (somewhere, not specifically in the NEC) that the pancake
box can be used as a junction box, as long as the fixture atached is
domed and hence provides the additional cubic inchdes needed for the
junction.

Is the second statement true? If so, do inspectors go along with
it?

If I have 6 outdoor fixtures to install along the front of a building;
can I just daisy chain a 14/2 to each location, and leave (2) 1 foot
ends hanging out of a hole at each location, claiming a pancake box +
domed fixture will be installed at each location (when the building
exterior is finished)? I've seen plenty of new construction where the
wiring for exterior lights is jsut left hanging, and I assume they get
their rough wiring bought off prior to completing the exterior trim/
fixtures.

Mike