* Could not find a usable .config in the kernel source directory.
 * Please ensure that /usr/src/linux points to a configured set of Linux sources
.
 * If you are using KBUILD_OUTPUT, please set the environment var so that
 * it points to the necessary object directory so that it might find .config.
 *
 * ERROR: media-video/linux-uvc-0.1.0_pre126 failed.
 * Call stack:
 *                       ebuild.sh, line 1711:  Called dyn_setup
 *                       ebuild.sh, line  762:  Called qa_call 'pkg_setup'
 *                       ebuild.sh, line   44:  Called pkg_setup
 *   linux-uvc-0.1.0_pre126.ebuild, line   25:  Called linux-mod_pkg_setup
 *                linux-mod.eclass, line  465:  Called linux-info_pkg_setup
 *               linux-info.eclass, line  558:  Called die
 * The specific snippet of code:
 *      get_version || die "Unable to calculate Linux Kernel version"
 *  The die message:
 *   Unable to calculate Linux Kernel version