[vbox-dev] VirtualBox 6.1.6-8 [path/to/vboxnetflt.ko] undefined!

[Jose R R]

Niltze [Hello]-
uname -a
Linux huitzilopochtli 5.5.0-2+reiser4.0.2-amd64 #1 SMP Debian
5.5.19-2+reiser4.0.2 (2020-04-27) x86_64 GNU/Linux

I build from VirtualBox source on reiser4 -formatted media
environment. Usually no issues but these last version iterations have
introduced make install failures:
make: Entering directory
'/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src'
make[1]: Entering directory
'/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxdrv'
make V= CONFIG_MODULE_SIG= CONFIG_MODULE_SIG_ALL= -C
/lib/modules/5.5.0-2+reiser4.0.2-amd64/build
M=/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxdrv
SRCROOT=/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxdrv
-j8 modules
make[2]: Entering directory
'/usr/tzinti/linux-headers-5.5.0-2+reiser4.0.2-amd64'
  Building modules, stage 2.
  MODPOST 1 modules
make[2]: Leaving directory '/usr/tzinti/linux-headers-5.5.0-2+reiser4.0.2-amd64'
make V= CONFIG_MODULE_SIG= CONFIG_MODULE_SIG_ALL= -C
/lib/modules/5.5.0-2+reiser4.0.2-amd64/build
M=/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxdrv
SRCROOT=/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxdrv
INSTALL_MOD_PATH= INSTALL_MOD_DIR=misc modules_install
make[2]: Entering directory
'/usr/tzinti/linux-headers-5.5.0-2+reiser4.0.2-amd64'
  INSTALL /usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxdrv/vboxdrv.ko
  DEPMOD  5.5.0-2+reiser4.0.2-amd64
Warning: modules_install: missing 'System.map' file. Skipping depmod.
make[2]: Leaving directory '/usr/tzinti/linux-headers-5.5.0-2+reiser4.0.2-amd64'
make[1]: Leaving directory
'/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxdrv'
make[1]: Entering directory
'/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt'
make V= CONFIG_MODULE_SIG= CONFIG_MODULE_SIG_ALL= -C
/lib/modules/5.5.0-2+reiser4.0.2-amd64/build
M=/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt
SRCROOT=/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt
-j8 modules
make[2]: Entering directory
'/usr/tzinti/linux-headers-5.5.0-2+reiser4.0.2-amd64'
  Building modules, stage 2.
  MODPOST 1 modules
ERROR: "VBoxHost_RTErrConvertToErrno"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTUuidFromStr"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTErrConvertFromErrno"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTLogLoggerEx"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTNetIPv6PseudoChecksumEx"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTSpinlockDestroy"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTUuidCompareStr"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTSemEventCreate"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTSemFastMutexRequest"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTLogRelGetDefaultInstanceEx"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTSemEventSignal"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTMemAllocTag"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTSemEventWait"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTNetIPv4PseudoChecksum"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTNetIPv4FinalizeChecksum"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTSemFastMutexRelease"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTSpinlockAcquire"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTR0Term"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTMemFree"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTTimeNanoTS"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTSemEventDestroy"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTThreadPreemptIsEnabled"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTSpinlockRelease"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTSemFastMutexDestroy"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTMemAllocZVarTag"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTSemFastMutexCreate"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTR0Init"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "SUPDrvLinuxIDC"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTSpinlockCreate"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
ERROR: "VBoxHost_RTNetIPv4HdrChecksum"
[/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/vboxnetflt.ko]
undefined!
make[4]: *** [/usr/tzinti/linux-headers-5.5.0-2+reiser4.0.2-common/scripts/Makefile.modpost:94:
__modpost] Error 1
make[3]: *** [/usr/tzinti/linux-headers-5.5.0-2+reiser4.0.2-common/Makefile:1620:
modules] Error 2
make[2]: *** [/usr/src/linux-headers-5.5.0-2+reiser4.0.2-common/Makefile:179:
sub-make] Error 2
make[2]: Leaving directory '/usr/tzinti/linux-headers-5.5.0-2+reiser4.0.2-amd64'
make[1]: *** [/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt/Makefile-footer.gmk:114:
vboxnetflt] Error 2
make[1]: Leaving directory
'/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src/vboxnetflt'
make: *** [Makefile:97: install] Error 2
make: Leaving directory
'/usr/tzinti/build/VirtualBox-6.1.8/out/linux.amd64/release/bin/src'

I would appreciate any insight.

Best Professional Regards.

-- 
Jose R R
http://metztli.it
---------------------------------------------------------------------------------------------
Download Metztli Reiser4: Debian Buster w/ Linux 5.5.19 AMD64
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feats ZSTD compression https://sf.net/projects/metztli-reiser4/
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Official current Reiser4 resources: https://reiser4.wiki.kernel.org/