In order to get the microphone and the finger print reader, I needed to upgrade the kernel of my Debian Buster to kernel v5 or over.
After installing the new kernel, I noticed that my mmbim device was not showing up anymore in modem-manager-gui.
I wanted to rebuild the xmm7360 driver, but the make command now fail:
dka@dka:[~/workspace/github.com/juhovh/xmm7360_usb (master)]: make
make -C /lib/modules/5.3.0-0.bpo.2-amd64/build M=/home/dka/workspace/github.com/juhovh/xmm7360_usb modules
make[1]: *** /lib/modules/5.3.0-0.bpo.2-amd64/build: No such file or directory. Stop.
make: *** [Makefile:8: default] Error 2
It seems that /lib/modules/4.19.0-6-amd64/build is providing tooling from linux-kbuild-4.19:
dka@dka:[/lib/modules/4.19.0-6-amd64/build]: ll
total 1552
lrwxrwxrwx 1 root root 33 Sep 20 12:51 tools -> ../../lib/linux-kbuild-4.19/tools
lrwxrwxrwx 1 root root 35 Sep 20 12:51 scripts -> ../../lib/linux-kbuild-4.19/scripts
drwxr-xr-x 3 root root 4096 Oct 29 19:36 arch
drwxr-xr-x 4 root root 4096 Oct 29 19:36 include
lrwxrwxrwx 1 root root 42 Oct 30 18:25 Kconfig -> /lib/modules/4.19.0-6-amd64/build/Makefile
-rw-r--r-- 1 root root 1353400 Nov 11 01:30 Module.symvers
-rw-r--r-- 1 root root 306 Nov 11 01:30 Makefile
-rw-r--r-- 1 root root 243 Nov 11 01:30 .kernelvariables
-rw-r--r-- 1 root root 206361 Nov 11 01:30 .config
drwxr-xr-x 4 root root 4096 Nov 26 01:20 .
Those tool are not within /lib/modules/5.3.0-0.bpo.2-amd64/build which is not created directory.
Because the kernel v4.19 had some symlink to ../../lib/linux-kbuild-4.19/tools, I figure out that I needed to install linux-kbuild-5.3.
After installing it, I still do not have the symlink. Why? I am not able to build the driver and use the Fibocom device.
How can I fix the build environment in the new kernel? Or how can I restore the driver?
