~ # emerge -1av ati-drivers

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R    ] x11-drivers/ati-drivers-14.12-r3:1::gentoo [14.12-r3:1::x11] USE="modules qt4 -debug -pax_kernel -static-libs (-gdm-hack%)" ABI_X86="32 (64)" 0 KiB

Total: 1 package (1 reinstall), Size of downloads: 0 KiB

Would you like to merge these packages? [Yes/No] y

>>> Verifying ebuild manifests
>>> Running pre-merge checks for x11-drivers/ati-drivers-14.12-r3
 * Determining the location of the kernel source code
 * Found kernel source directory:
 *     /usr/src/linux
 * Found kernel object directory:
 *     /lib/modules/3.19.3-gentoo/build
 * Found sources for kernel version:
 *     3.19.3-gentoo
 * Checking for suitable kernel configuration options...                 [ ok ]
 * Checking for suitable kernel configuration options...                 [ ok ]

>>> Emerging (1 of 1) x11-drivers/ati-drivers-14.12-r3::gentoo
 * amd-catalyst-omega-14.12-linux-run-installers.zip SHA256 SHA512 WHIRLPOOL size ;-) ...                [ ok ]
 * xvba-sdk-0.74-404001.tar.gz SHA256 SHA512 WHIRLPOOL size ;-) ...      [ ok ]
 * Determining the location of the kernel source code
 * Found kernel source directory:
 *     /usr/src/linux
 * Found kernel object directory:
 *     /lib/modules/3.19.3-gentoo/build
 * Found sources for kernel version:
 *     3.19.3-gentoo
 * 
 * Please note that this driver only supports graphic cards based on
 * Evergreen chipset and newer.
 * This includes the AMD Radeon HD 5400+ series at this moment.
 * 
 * If your card is older then use x11-drivers/xf86-video-ati
 * For migration informations please refer to:
 * http://www.gentoo.org/proj/en/desktop/x/x11/ati-migration-guide.xml
 * 
>>> Unpacking source...
>>> Unpacking amd-catalyst-omega-14.12-linux-run-installers.zip to /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work
Warning: target directory exists /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work
>>> Unpacking xvba-sdk-0.74-404001.tar.gz to /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/xvba_sdk
>>> Source unpacked in /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work
/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/extra
/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/extra
>>> Preparing source in /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work ...
 * Applying ati-powermode-opt-path-3.patch ...                           [ ok ]
 * Applying ati-drivers-x32_something_something.patch ...                [ ok ]
 * Applying ati-drivers-12.9-KCL_AGP_FindCapsRegisters-stub.patch ...    [ ok ]
 * Applying ati-drivers-13.8-beta-include-seq_file.patch ...             [ ok ]
 * Applying fgl_glxgears-do-not-include-glATI.patch ...                  [ ok ]
 * Applying fix-the-linux-3.17-no_hotplug-error.patch ...                [ ok ]
 * Applying use-kernel_fpu_begin.patch ...                               [ ok ]
 * Converting 2.6.x/Makefile to use M= instead of SUBDIRS= ...           [ ok ]
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work ...
 * Preparing fglrx module
make -j9 HOSTCC=x86_64-pc-linux-gnu-gcc CROSS_COMPILE=x86_64-pc-linux-gnu- 'LDFLAGS=-m elf_x86_64' GCC_VER_MAJ=4 KVER=3.19.3-gentoo KDIR=/lib/modules/3.19.3-gentoo/build 'CFLAGS_MODULE+=-DMODULE -DATI -DFGL' CFLAGS_MODULE+=-DCOMPAT_ALLOC_USER_SPACE=arch_compat_alloc_user_space kmod_build 
make -C /lib/modules/3.19.3-gentoo/build M=/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x modules
make[1]: Entering directory '/usr/src/linux-3.19.3-gentoo'
  CC [M]  /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/firegl_public.o
  CC [M]  /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/kcl_acpi.o
  CC [M]  /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/kcl_agp.o
  CC [M]  /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/kcl_debug.o
  CC [M]  /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/kcl_ioctl.o
  CC [M]  /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/kcl_io.o
  CC [M]  /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/kcl_pci.o
  CC [M]  /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/kcl_str.o
  CC [M]  /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/kcl_iommu.o
  CC [M]  /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/kcl.o
  CC [M]  /var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/kcl_wait.o
/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/kcl_iommu.c: In function ‘KCL_IOMMU_CheckInfo’:
/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/kcl_iommu.c:237:21: warning: unused variable ‘pdev’ [-Wunused-variable]
     struct pci_dev* pdev = (struct pci_dev*)pcidev;
                     ^
/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/kcl_iommu.c: In function ‘KCL_IOMMU_RestoreCBs’:
/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/kcl_iommu.c:230:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c: In function ‘kasSetExecutionLevel’:
/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c:4821:5: error: implicit declaration of function ‘__get_cpu_var’ [-Werror=implicit-function-declaration]
     orig_level = __get_cpu_var(kasExecutionLevel);
     ^
/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c:4822:38: error: lvalue required as left operand of assignment
     __get_cpu_var(kasExecutionLevel) = level;
                                      ^
/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c: At top level:
/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/firegl_public.c:6398:12: warning: ‘KCL_fpu_save_init’ defined but not used [-Wunused-function]
 static int KCL_fpu_save_init(struct task_struct *tsk)
            ^
cc1: some warnings being treated as errors
scripts/Makefile.build:257: recipe for target '/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/firegl_public.o' failed
make[2]: *** [/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x/firegl_public.o] Error 1
Makefile:1382: recipe for target '_module_/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x' failed
make[1]: *** [_module_/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x] Error 2
make[1]: Leaving directory '/usr/src/linux-3.19.3-gentoo'
Makefile:88: recipe for target 'kmod_build' failed
make: *** [kmod_build] Error 2
 * ERROR: x11-drivers/ati-drivers-14.12-r3::gentoo failed (compile phase):
 *   emake failed
 * 
 * If you need support, post the output of `emerge --info '=x11-drivers/ati-drivers-14.12-r3::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=x11-drivers/ati-drivers-14.12-r3::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/temp/environment'.
 * Working directory: '/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x'
 * S: '/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work'

>>> Failed to emerge x11-drivers/ati-drivers-14.12-r3, Log file:

>>>  '/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/temp/build.log'

 * Messages for package x11-drivers/ati-drivers-14.12-r3:

 * 
 * Please note that this driver only supports graphic cards based on
 * Evergreen chipset and newer.
 * This includes the AMD Radeon HD 5400+ series at this moment.
 * 
 * If your card is older then use x11-drivers/xf86-video-ati
 * For migration informations please refer to:
 * http://www.gentoo.org/proj/en/desktop/x/x11/ati-migration-guide.xml
 * ERROR: x11-drivers/ati-drivers-14.12-r3::gentoo failed (compile phase):
 *   emake failed
 * 
 * If you need support, post the output of `emerge --info '=x11-drivers/ati-drivers-14.12-r3::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=x11-drivers/ati-drivers-14.12-r3::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/temp/environment'.
 * Working directory: '/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work/common/lib/modules/fglrx/build_mod/2.6.x'
 * S: '/var/tmp/portage/x11-drivers/ati-drivers-14.12-r3/work'