DKMS make.log for nvidia-340.107 for kernel 4.19.77-1-lts (x86_64)
Mon Oct  7 00:08:16 +03 2019

gcc-version-check failed:

The compiler used to compile the kernel (gcc
9.1) does not exactly match the current compiler
(gcc 9.2).  The Linux 2.6 kernel module loader
rejects kernel modules built with a version of gcc
that does not exactly match that of the compiler
used to build the running kernel.

If you know what you are doing and want to override
the gcc version check, you can do so by setting the
IGNORE_CC_MISMATCH environment variable to "1".

In any other case, set the CC environment variable
to the name of the compiler that was used to compile
the kernel.

*** Failed CC version check. Bailing out! ***

make: *** [nvidia-modules-common.mk:201: build-sanity-checks] Error 1
make: Entering directory '/var/lib/dkms/nvidia/340.107/build/uvm'
cd ./..; make module SYSSRC=/lib/modules/4.19.77-1-lts/build SYSOUT=/lib/modules/4.19.77-1-lts/build KBUILD_EXTMOD=./..
make[1]: Entering directory '/var/lib/dkms/nvidia/340.107/build'
NVIDIA: calling KBUILD...
make[2]: Entering directory '/usr/lib/modules/4.19.77-1-lts/build'
test -e include/generated/autoconf.h -a -e include/config/auto.conf || (	\
echo >&2;							\
echo >&2 "  ERROR: Kernel configuration is invalid.";		\
echo >&2 "         include/generated/autoconf.h or include/config/auto.conf are missing.";\
echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
echo >&2 ;							\
/bin/false)
mkdir -p ./../.tmp_versions ; rm -f ./../.tmp_versions/*
make -f ./scripts/Makefile.build obj=./..
scripts/Makefile.build:45: ../Makefile: No such file or directory
make[3]: *** No rule to make target '../Makefile'.  Stop.
make[2]: *** [Makefile:1519: _module_./..] Error 2
make[2]: Leaving directory '/usr/lib/modules/4.19.77-1-lts/build'
NVIDIA: left KBUILD.
nvidia.ko failed to build!
make[1]: *** [Makefile:192: nvidia.ko] Error 1
make[1]: Leaving directory '/var/lib/dkms/nvidia/340.107/build'
make: *** [Makefile:220: ../Module.symvers] Error 2
make: Leaving directory '/var/lib/dkms/nvidia/340.107/build/uvm'