USE=opencl depends exclusively on x11-drivers/ati-drivers, which is
being given its last rites.
# Kacper Kowalik <xarthisius@gentoo.org> (09 Aug 2013)
# Works on amd64
-sys-apps/hwloc -cuda -gl -opencl
+sys-apps/hwloc -cuda -gl
# Michał Górny <mgorny@gentoo.org> (22 Jul 2013)
# Meaningless on amd64 (it controls the 32-bit x86 JIT).
# Kacper Kowalik <xarthisius@gentoo.org> (09 Aug 2013)
# Works on x86
-sys-apps/hwloc -cuda -gl -opencl
+sys-apps/hwloc -cuda -gl
# Pacho Ramos <pacho@gentoo.org> (20 Jul 2013)
# Keywords missing, bug #478104