i have installed funtoo and run fglrx with result ok.
i have problem to merge compiz with this error:
emerge x11-libs/compizconfig-backend-gconf
Calculating dependencies... done!

>>> Verifying ebuild manifests
>>> Running pre-merge checks for x11-wm/compiz-0.9.12

>>> Emerging (1 of 3) x11-wm/compiz-0.9.12

• Fetching files in the background. To view fetch progress, run
• `tail -f /var/log/emerge-fetch.log` in another terminal.
  >>> Downloading 'http://distfiles.gentoo.org/distfiles/compiz-0.9.12.tgz'
  -2015-05-27 22:40:10- http://distfiles.gentoo.org/distfiles/compiz-0.9.12.tgz
  Resolving distfiles.gentoo.org... 216.165.129.135, 140.211.166.134, 156.56.247.195, ...
  Connecting to distfiles.gentoo.org|216.165.129.135|:80... connected.
  HTTP request sent, awaiting response... 404 Not Found
  2015-05-27 22:40:11 ERROR 404: Not Found.

>>> Downloading 'http://bazaar.launchpad.net/~compiz-team/compiz/0.9.12/tarball/3932'
-2015-05-27 22:40:11- http://bazaar.launchpad.net/~compiz-team/compiz/0.9.12/tarball/3932
Resolving bazaar.launchpad.net... 91.189.95.84
Connecting to bazaar.launchpad.net|91.189.95.84|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [application/octet-stream]
Saving to: ‘/usr/portage/distfiles/compiz-0.9.12.tgz’

/usr/portage/distfi [ <=> ] 5,36M 773KB/s in 8,7s

2015-05-27 22:40:21 (633 KB/s) - ‘/usr/portage/distfiles/compiz-0.9.12.tgz’ saved [5617803]

!!! Fetched file: compiz-0.9.12.tgz VERIFY FAILED!
!!! Reason: Filesize does not match recorded size
!!! Got: 5617803
!!! Expected: 5617904
Refetching... File renamed to '/usr/portage/distfiles/compiz-0.9.12.tgz.checksum_failure.0o8md1'

!!! Couldn't download 'compiz-0.9.12.tgz'. Aborting.

• Fetch failed for 'x11-wm/compiz-0.9.12', Log file:
• '/var/tmp/portage/x11-wm/compiz-0.9.12/temp/build.log'

>>> Failed to emerge x11-wm/compiz-0.9.12, Log file:

>>> '/var/tmp/portage/x11-wm/compiz-0.9.12/temp/build.log'

• Messages for package x11-wm/compiz-0.9.12:

• Fetch failed for 'x11-wm/compiz-0.9.12', Log file:
• '/var/tmp/portage/x11-wm/compiz-0.9.12/temp/build.log'

Fix it ?