/var/tmp/portage/app-emulation/virtualbox-guest-additions-6.1.16-r1/work/VirtualBox-6.1.16/out/linux.amd64/release/bin/additions/src/vboxguest/r0drv/linux/memobj-r0drv-linux.c: In function ‘rtR0MemObjLinuxVMap’: /var/tmp/portage/app-emulation/virtualbox-guest-additions-6.1.16-r1/work/VirtualBox-6.1.16/out/linux.amd64/release/bin/additions/src/vboxguest/r0drv/linux/memobj-r0drv-linux.c:560:34: error: implicit declaration of function ‘alloc_vm_area’ [-Werror=implicit-function-declaration] 560 | pMemLnx->pArea = alloc_vm_area(pMemLnx->Core.cb, papPtes); /* Note! pArea->nr_pages is not set. */ | ^~~~~~~~~~~~~ /var/tmp/portage/app-emulation/virtualbox-guest-additions-6.1.16-r1/work/VirtualBox-6.1.16/out/linux.amd64/release/bin/additions/src/vboxguest/r0drv/linux/memobj-r0drv-linux.c:560:32: warning: assignment to ‘struct vm_struct *’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion] ------------------------------------------------------------------- This is an unstable amd64 chroot image at a tinderbox (==build bot) name: 17.1-20201231-222458 ------------------------------------------------------------------- gcc-config -l: clang version 11.0.0 Target: x86_64-pc-linux-gnu Thread model: posix InstalledDir: /usr/lib/llvm/11/bin /usr/lib/llvm/11 11.0.0 Available Python interpreters, in order of preference: [1] python3.8 [2] python3.9 (fallback) [3] python2.7 (fallback) [4] pypy3 (fallback) Available Rust versions: [1] rust-1.48.0 * The following VMs are available for generation-2: *) AdoptOpenJDK 8.272_p10 [openjdk-bin-8] Available Java Virtual Machines: [1] openjdk-bin-8 system-vm The Glorious Glasgow Haskell Compilation System, version 8.8.4 timestamp(s) of HEAD at this tinderbox image: /var/db/repos/gentoo Wed Jan 6 05:35:08 AM UTC 2021 emerge -qpvO app-emulation/virtualbox-guest-additions [ebuild N ] app-emulation/virtualbox-guest-additions-6.1.16-r1 USE="-X"
Created attachment 681406 [details] emerge-info.txt
Created attachment 681409 [details] app-emulation:virtualbox-guest-additions-6.1.16-r1:20210106-062205.log.bz2
Created attachment 681412 [details] emerge-history.txt
Created attachment 681415 [details] environment
Created attachment 681418 [details] etc.portage.tbz2
Right, virtualbox-guest-additions kernel modules does not build with kernel 5.10 yet. Maybe it is time to offer a virtualbox-guest-additions(USE flag) using the kernel builtin VBOX modules instead of building its own modules?
Should be fixed with ~app-emulation/virtualbox-guest-additions-6.1.18