Hi,

This is the driver I am using - amd-driver-installer-12.6-legacy-x86.x86_64.run

Error is,

cat /usr/share/ati/fglrx-install.log
Check if system has the tools required for installation.
Uninstalling any previously installed drivers.
[Message] Kernel Module : Trying to install a precompiled kernel module.
[Message] Kernel Module : Precompiled kernel module version mismatched.
[Message] Kernel Module : Found kernel module build environment, generating kernel module now.
AMD kernel module generator version 2.1
doing Makefile based build for kernel 2.6.x and higher
rm -rf *.c *.h *.o *.ko *.a .??* *.symvers
make -C /lib/modules/3.5.7-gentoo/build SUBDIRS=/lib64/modules/fglrx/build_mod/2.6.x modules
make[1]: Entering directory `/usr/src/linux-3.5.7-gentoo'
  CC [M]  /lib64/modules/fglrx/build_mod/2.6.x/firegl_public.o
/lib64/modules/fglrx/build_mod/2.6.x/firegl_public.c: In function ‘KCL_MEM_AllocLinearAddrInterval’:
/lib64/modules/fglrx/build_mod/2.6.x/firegl_public.c:2152:5: error: implicit declaration of function ‘do_mmap’
/lib64/modules/fglrx/build_mod/2.6.x/firegl_public.c:2152:13: warning: cast to pointer from integer of different size
make[2]: *** [/lib64/modules/fglrx/build_mod/2.6.x/firegl_public.o] Error 1
make[1]: *** [_module_/lib64/modules/fglrx/build_mod/2.6.x] Error 2
make[1]: Leaving directory `/usr/src/linux-3.5.7-gentoo'

make: *** [kmod_build] Error 2
build failed with return value 2
[Error] Kernel Module : Failed to compile kernel module

What are my options guys?

Thanks in advance.