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'.
*