Bug 837618 is a problem where the list of file names for object files to be linked together is too long for the linker to handle. It can be fixed in clang, but in the meantime our Mac nightlies are broken. I'm proposing that we temporarily disable WebRTC (which has plenty of object files should give us some breathing space), and in actual fact is not correctly packaged at the moment anyway, also on top of that argument, is that WebRTC hasn't yet been fully enabled in trunk. Once bug 837618 is fixed, then we can re-enable WebRTC properly with the appropriate packaging etc.

Could we get mozconfig options to disable all this Firefox (OS) stuff? I'd love to have it off permanently :)

(In reply to :aceman from comment #1) > Could we get mozconfig options to disable all this Firefox (OS) stuff? I'd > love to have it off permanently :) That option (--disable-webrtc) is already present. Note this is only temporary turn off, as we suspect add-ons could make good use of WebRTC.

This landed earlier and has worked for now: https://hg.mozilla.org/comm-central/rev/cf9d0f18837e Filed bug 839272 on re-enabling WebRTC.