fglrx-core 2:14.201-0ubuntu2.1: fglrx-core kernel module failed to build

Problem is on Ubuntu 14.10 x64, running kernel 4.0.0-040000-generic with a Radeon HD 6670 video card.

ProblemType: Package
DistroRelease: Ubuntu 14.10
Package: fglrx-core 2:14.201-0ubuntu2.1
Uname: Linux 4.0.0-040000-generic x86_64
.tmp.unity.support.test.1:

ApportVersion: 2.14.7-0ubuntu8.5
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
DKMSKernelVersion: 4.0.4-040004-generic
Date: Sat May 23 20:08:04 2015
DistUpgraded: Fresh install
DistroCodename: utopic
DistroVariant: ubuntu
DkmsStatus:
 fglrx-core, 14.201: added
 virtualbox, 4.3.18, 3.17.1-031701-generic, x86_64: installed
DuplicateSignature: dkms:fglrx-core:2:14.201-0ubuntu2.1:/var/lib/dkms/fglrx-core/14.201/build/2.6.x/firegl_public.c:4462:9: error: implicit declaration of function ‘read_cr4’ [-Werror=implicit-function-declaration]
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Turks XT [Radeon HD 6670/7670] [1002:6758] (prog-if 00 [VGA controller])
   Subsystem: PC Partner Limited / Sapphire Technology Radeon HD 6670 [174b:e181]
InstallationDate: Installed on 2015-03-12 (72 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
MachineType: System manufacturer System Product Name
PackageVersion: 2:14.201-0ubuntu2.1
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.0.0-040000-generic root=UUID=3eb2641d-3913-4891-acb1-c10a19b1b42e ro
Renderer: Software
SourcePackage: fglrx-installer
Title: fglrx-core 2:14.201-0ubuntu2.1: fglrx-core kernel module failed to build
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/09/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2104
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5B
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2104:bd03/09/2009:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5B:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.61+git20150521.e9ea1f42-0ubuntu0ricotz2~utopic
version.libgl1-mesa-dri: libgl1-mesa-dri 10.6.0~git20150521+10.6.7c5cca5e-0ubuntu0ricotz~utopic
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.6.0~git20150521+10.6.7c5cca5e-0ubuntu0ricotz~utopic
version.xserver-xorg-core: xserver-xorg-core 2:1.16.1.901-1ubuntu1~utopic1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.99+git20150521.d64a13eb-0ubuntu0ricotz~utopic
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
xserver.bootTime: Sat May 23 09:43:35 2015
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Power Button KEYBOARD, id 7
 input Logitech USB Optical Mouse MOUSE, id 8
 input AT Translated Set 2 keyboard KEYBOARD, id 9
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.16.1.901-1ubuntu1~utopic1