I download source from:
https://kernel.googlesource.com/pub/scm/linux/kernel/git/stable/linux-stable/+/linux-4.8.y/drivers/gpu/drm/bochs

into /usr/src/bochs-drm-4.8.0


I run: dkms build -m bochs-drm -v 4.8.0

Kernel preparation unnecessary for this kernel. Skipping...
Building module:
cleaning build area....
make KERNELRELEASE=4.8.0-26-generic -C /lib/modules/4.8.0-26-generic/build M=/var/lib/dkms/bochs-drm/4.8.0/build....
Error! Build of bochs-drm.ko failed for: 4.8.0-26-generic (x86_64)
Consult the make.log in the build directory
/var/lib/dkms/bochs-drm/4.8.0/build/ for more information




in make.log:

DKMS make.log for bochs-drm-4.8.0 for kernel 4.8.0-26-generic (x86_64)
Thu Nov 3 11:27:20 CET 2016
make: Entering directory '/usr/src/linux-headers-4.8.0-26-generic'
LD /var/lib/dkms/bochs-drm/4.8.0/build/built-in.o
Building modules, stage 2.
MODPOST 0 modules
make: Leaving directory '/usr/src/linux-headers-4.8.0-26-generic'



in dkms.conf:

PACKAGE_NAME="bochs-drm"
PACKAGE_VERSION="4.8.0"
BUILT_MODULE_NAME[0]="bochs-drm"
DEST_MODULE_LOCATION[0]="/kernel/drivers/gpu/drm/bochs/"
AUTOINSTALL="yes"