[Solved]升级内核后，升级nvidia-drivers出错。

解决。在配置内核的时候，没有配置正确。

出错信息为：

nvidia.ko failed to build!
make[1]: *** [module] Error 1
make: *** [module] Error 2
*
* ERROR: x11-drivers/nvidia-drivers-173.14.09 failed.
* Call stack:
* ebuild.sh, line 49: Called src_compile
* environment, line 3672: Called linux-mod_src_compile
* environment, line 2698: Called die
* The specific snippet of code:
* eval "emake HOSTCC="$(tc-getBUILD_CC)" CROSS_COMPILE=${CHOST}- LDFLAGS="$(get_abi_LDFLAGS)" ${BUILD_FIXES} ${BUILD_PARAMS} ${BUILD_TARGETS} " || die "Unable to emake HOSTCC="$(tc-getBUILD_CC)" CROSS_COMPILE=${CHOST}- LDFLAGS="$(get_abi_LDFLAGS)" ${BUILD_FIXES} ${BUILD_PARAMS} ${BUILD_TARGETS}";
* The die message:
* Unable to emake HOSTCC=i686-pc-linux-gnu-gcc CROSS_COMPILE=i686-pc-linux-gnu- LDFLAGS= IGNORE_CC_MISMATCH=yes V=1 SYSSRC=/usr/src/linux SYSOUT=/usr/src/linux HOST_CC=i686-pc-linux-gnu-gcc clean module
*
* 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-173.14.09/temp/build.log'.
* The ebuild environment file is located at '/var/tmp/portage/x11-drivers/nvidia-drivers-173.14.09/temp/environment'.
*

>>> Failed to emerge x11-drivers/nvidia-drivers-173.14.09, Log file:

>>> '/var/tmp/portage/x11-drivers/nvidia-drivers-173.14.09/temp/build.log'

* Messages for package x11-drivers/nvidia-drivers-173.14.09:

*
* ERROR: x11-drivers/nvidia-drivers-173.14.09 failed.
* Call stack:
* ebuild.sh, line 49: Called src_compile
* environment, line 3672: Called linux-mod_src_compile
* environment, line 2698: Called die
* The specific snippet of code:
* eval "emake HOSTCC="$(tc-getBUILD_CC)" CROSS_COMPILE=${CHOST}- LDFLAGS="$(get_abi_LDFLAGS)" ${BUILD_FIXES} ${BUILD_PARAMS} ${BUILD_TARGETS} " || die "Unable to emake HOSTCC="$(tc-getBUILD_CC)" CROSS_COMPILE=${CHOST}- LDFLAGS="$(get_abi_LDFLAGS)" ${BUILD_FIXES} ${BUILD_PARAMS} ${BUILD_TARGETS}";
* The die message:
* Unable to emake HOSTCC=i686-pc-linux-gnu-gcc CROSS_COMPILE=i686-pc-linux-gnu- LDFLAGS= IGNORE_CC_MISMATCH=yes V=1 SYSSRC=/usr/src/linux SYSOUT=/usr/src/linux HOST_CC=i686-pc-linux-gnu-gcc clean module
*
* 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-173.14.09/temp/build.log'.
* The ebuild environment file is located at '/var/tmp/portage/x11-drivers/nvidia-drivers-173.14.09/temp/environment'.