QEMU 2.0.0 is now released.

The full list of changes are available at: http://wiki.qemu.org/ChangeLog/2.0

It appears that doing a checkout of tag ‘v2.0.0’, build and install will produce a binary that reports version 1.7.9

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git status
HEAD detached at v2.0.0
nothing to commit, working directory clean
qemu-system-arm --version
QEMU emulator version 1.7.93, Copyright (c) 2003-2008 Fabrice Bellard

I did a quick look and they are pulling the version during the ./configure stage so since I am always on the master (bleed-edge) branch, my installed version shows up as 1.7.9. You will need to checkout, configure, build and install to produce a binary that has the correct version (QEMUVERSION) assigned:

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qemu-system-arm --version
QEMU emulator version 2.0.0, Copyright (c) 2003-2008 Fabrice Bellard