* Checking your kernel configuration for TUN/TAP support.
 * 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: net-misc/hamachi-0.9.9.9_p20-r2 failed.
 * Call stack:
 *                       ebuild.sh, line 1717:  Called dyn_setup
 *                       ebuild.sh, line  768:  Called qa_call 'pkg_setup'
 *                       ebuild.sh, line   44:  Called pkg_setup
 *   hamachi-0.9.9.9_p20-r2.ebuild, line   38:  Called check_extra_config
 *               linux-info.eclass, line  425:  Called require_configured_kernel
 *               linux-info.eclass, line  145:  Called die
 * The specific snippet of code:
 *              die "Kernel not configured; no .config found in ${KV_OUT_DIR}"
 *  The die message:
 *   Kernel not configured; no .config found in 
 * 
 * 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/net-misc/hamachi-0.9.9.9_p20-r2/temp/build.log'.
 *