NVIDIA: calling KBUILD...
make CC=i586-pc-linux-gnu-gcc  KBUILD_VERBOSE=1 -C /usr/src/linux M=/var/tmp/portage/x11-drivers/nvidia-drivers-100.14.11-r10/work/NVIDIA-Linux-x86-100.14.11-pkg0/usr/src/nv modules
make[2]: warning: jobserver unavailable: using -j1.  Add `+' to parent make rule.
  Building modules, stage 2.
NVIDIA: left KBUILD.
>>> Source compiled.
>>> Test phase [not enabled]: x11-drivers/nvidia-drivers-100.14.11-r10

>>> Install nvidia-drivers-100.14.11-r10 into /var/tmp/portage/x11-drivers/nvidia-drivers-100.14.11-r10/image/ category x11-drivers
 * Installing nvidia module
 *
 * ERROR: x11-drivers/nvidia-drivers-100.14.11-r10 failed.
 * Call stack:
 *   ebuild.sh, line 1647:   Called dyn_install
 *   ebuild.sh, line 1082:   Called qa_call 'src_install'
 *   ebuild.sh, line 44:   Called src_install
 *   nvidia-drivers-100.14.11-r10.ebuild, line 218:   Called src_install-libs
 *   nvidia-drivers-100.14.11-r10.ebuild, line 315:   Called want_tls
 *   nvidia-drivers-100.14.11-r10.ebuild, line 435:   Called built_with_use 'sys-libs/glibc' 'nptl'
 *   eutils.eclass, line 1714:   Called die
 *
 * sys-libs/glibc-2.6 does not actually support the nptl USE flag!
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/x11-drivers/nvidia-drivers-100.14.11-r10/temp/build.log'.
 *