ftbfs in focal

[Matthias Klose]

seen in the second focal test rebuild
https://launchpad.net/ubuntu/+archive/test-rebuild-20200327-focal/+build/18946774/+files/buildlog_ubuntu-focal-amd64.linux-restricted-modules-aws_5.4.0-1005.5_BUILDING.txt.gz

copying nvidia-uvm.ko
copying nvidia.ko
copying nvidia-drm.ko
copying nvidia-modeset.ko
II: dkms-build override dkms-build--nvidia-N found, executing
II: checking gcc version ...
GCC: (Ubuntu 9.2.1-31ubuntu3) 9.2.1 20200306
gcc (Ubuntu 9.3.0-8ubuntu1) 9.3.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

WW: gcc version missmatch between linux and linux-restricted-modules
WW: was: gcc (Ubuntu 9.2.1-31ubuntu3) 9.2.1 20200306 is: gcc (Ubuntu 9.3.0-8ubuntu1) 9.3.0
II: adding signatures from /usr/lib/linux/5.4.0-1005-aws ...
nvidia-drm.ko: FAILED
nvidia-modeset.ko: FAILED
nvidia-uvm.ko: FAILED
nvidia.ko: FAILED
sha256sum: WARNING: 4 computed checksums did NOT match
make[1]: *** [debian/rules:129: nvidia-aws] Error 1
make[1]: Leaving directory '/<<PKGBUILDDIR>>'

[Seth Forshee (sforshee)]

You rebuilt the package with a different compiler than what was used to compute the signatures/checksums in the kernel build, so you get different objects and mismatching checksums. This is expected.