FATAL: vmlinux has no symtab?
make[3]: *** [__modpost] Error 1
make[2]: *** [modules] Error 2
NVIDIA: left KBUILD.
nvidia.ko failed to build!
make[1]: *** [mdl] Error 1
make: *** [module] Error 2

!!! ERROR: media-video/nvidia-kernel-1.0.8762-r1 failed.
Call stack:
  ebuild.sh, line 1539:   Called dyn_compile
  ebuild.sh, line 939:   Called src_compile
  ebuild.sh, line 1248:   Called linux-mod_src_compile
  linux-mod.eclass, line 469:   Called die

!!! Unable to make  IGNORE_CC_MISMATCH=yes V=1 SYSSRC=/usr/src/linux SYSOUT=/usr/src/linux clean module.
!!! If you need support, post the topmost build error, and the call stack if relevant.