* Package:    app-emulation/virtualbox-guest-additions-5.2.16
 * Repository: gentoo
 * Maintainer: polynomial-c@gentoo.org
 * USE:        X abi_x86_64 amd64 elibc_glibc kernel_linux userland_GNU
 * FEATURES:   preserve-libs sandbox userpriv usersandbox
 * Determining the location of the kernel source code
 * Found kernel source directory:
 *     /usr/src/linux
 * Found sources for kernel version:
 *     4.17.8-gentooJRcustome
 * Checking for suitable kernel configuration options...
 [ ok ]
>>> Unpacking source...
>>> Unpacking VirtualBox-5.2.16.tar.bz2 to /var/tmp/portage/app-emulation/virtualbox-guest-additions-5.2.16/work
>>> Unpacking virtualbox-5.2.16-patches-01.tar.xz to /var/tmp/portage/app-emulation/virtualbox-guest-additions-5.2.16/work
Doing a test build, this may take a while.
Warning: test build failed.  Please check /tmp/vbox-export-guest.log
>>> Unpacking ./vbox-kmod.tar.gz to /var/tmp/portage/app-emulation/virtualbox-guest-additions-5.2.16/work
>>> Source unpacked in /var/tmp/portage/app-emulation/virtualbox-guest-additions-5.2.16/work
>>> Preparing source in /var/tmp/portage/app-emulation/virtualbox-guest-additions-5.2.16/work/VirtualBox-5.2.16 ...
 * Applying vboxguest-4.1.0-log-use-c99.patch ...
 [ ok ]
 * Applying patches from /var/tmp/portage/app-emulation/virtualbox-guest-additions-5.2.16/work/patches ...
 *   001_virtualbox-5.0.16-mesa-check.patch ...
 [ ok ]
 *   002_virtualbox-5.2.16-remove-configure-checks.patch ...
 [ ok ]
 *   003_virtualbox-4.0.2-restore_old_machines_dir.patch ...
 [ ok ]
 *   004_virtualbox-4.1.2-vboxpci-build.patch ...
 [ ok ]
 *   005_virtualbox-4.2.26-asneeded.patch ...
 [ ok ]
 *   006_virtualbox-4.2.18-vboxwebsrv_fix.patch ...
 [ ok ]
 *   008_virtualbox-4.3.14-missing_define.patch ...
 [ ok ]
 *   009-virtualbox-5.1.0-add_missing_gl_header.patch ...
 [ ok ]
 *   010_virtualbox-5.2.12-qt511.patch ...
 [ ok ]
 *   011_virtualbox-5.2.14-xpcom_const.patch ...
 [ ok ]
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/app-emulation/virtualbox-guest-additions-5.2.16/work/VirtualBox-5.2.16 ...
./configure --nofatal --disable-xpcom --disable-sdl-ttf --disable-pulse --disable-alsa --with-gcc=x86_64-pc-linux-gnu-gcc --with-g++=x86_64-pc-linux-gnu-g++ --target-arch=amd64 --with-linux=/usr/src/linux --build-headless
Checking for environment: Determined build machine: linux.amd64, target machine: linux.amd64, OK.
Checking for kBuild: 
  ** kmk (variable KBUILDDIR) not found!
Check /var/tmp/portage/app-emulation/virtualbox-guest-additions-5.2.16/work/VirtualBox-5.2.16/configure.log for details
 * ERROR: app-emulation/virtualbox-guest-additions-5.2.16::gentoo failed (configure phase):
 *   configure failed
 * 
 * Call stack:
 *     ebuild.sh, line 124:  Called src_configure
 *   environment, line 3551:  Called die
 * The specific snippet of code:
 *       "${cmd[@]}" || die "configure failed";
 * 
 * If you need support, post the output of `emerge --info '=app-emulation/virtualbox-guest-additions-5.2.16::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=app-emulation/virtualbox-guest-additions-5.2.16::gentoo'`.
 * The complete build log is located at '/var/log/Portage/build/app-emulation/virtualbox-guest-additions-5.2.16:20180722-004016.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/app-emulation/virtualbox-guest-additions-5.2.16/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/app-emulation/virtualbox-guest-additions-5.2.16/temp/environment'.
 * Working directory: '/var/tmp/portage/app-emulation/virtualbox-guest-additions-5.2.16/work/VirtualBox-5.2.16'
 * S: '/var/tmp/portage/app-emulation/virtualbox-guest-additions-5.2.16/work/VirtualBox-5.2.16'