pngquant 2.0.0

Closes #22097.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
git 1.8.4

Closes #22098.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Sip 4.15

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Pyqt 4.10.3

Closes #22084.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
osm2pgsql: fix protobuf-c support

Closes #22058.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
qemu 1.6.0: add vde networking support

The VDE (Virtual Distributed Ethernet) networking model is
useful for QEMU, as it allows muliple QEMU instances to connect
to virtual networks. More interesting is that a VDE server such
as vde_switch can connect a VDE network to the host machines
network, letting all QEMU instances on the virtual network
connect over the host's network.

This change adds support for VDE networking in QEMU by
using the vde project.

Closes #22017.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Mackup 0.5.1

Closes #22101.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
ghc: fix with Xcode 5.

Closes #21960.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
zeromq: don't patch HEAD

Closes #22107.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
AdobeAirSDK 3.8

Closes #22102.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
doxygen 1.8.5

Closes #22104.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Add --cc= syntax for selecting compilers
Unify compiler selection logic

This unifies the logic for selecting a compiler between superenv and
stdenv. A variation of superenv's `determine_cc`, which now returns a
symbol, has been moved into the shared ENV extension. Stdenv uses the
result of this directly (as it's always used symbols), while superenv
translates that back into a compiler string.

This also has the effect of disabling HOMEBREW_USE_(gcc|llvm|clang) in
stdenv, which have already been marked as deprecated for some time, and
enables the HOMEBREW_CC= environment variable syntax from superenv in
stdenv.