M should have a value。
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Title:
fatal error: classmap.h: No such file or directory
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I am still having the same error above with the latest update/upgrade
(at kernel 1033) to RPi3B running Ubuntu server 20.04 LTS (64-bit), as
shown below:
$ sudo make
make -C /lib/modules/5.4.0-1033-raspi/build M= modules
make[1]: Entering directory '/usr/src/linux-headers-5.4.0-1033-raspi'
HOSTC
I compiled the kernel module with raspberry pie. I found that the
makefile of Ubuntu 20.04 does not support subdirs =. It only supports M
=. When I change it to M =, I can compile normally.
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This same exact error is happening in the aarch64 Ubuntu 20.04 official
image for the Raspberry Pi. No matter the kernel version, headers, etc
it’s still the same error as mentioned above.
As I type I see there’s an entry saying it’s fixed. Guess I better check
again and see if this applies to aar
** Changed in: linux-kernel-headers (Ubuntu)
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/1895470
Title:
fatal error: classmap.h: No such file or directory
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-kernel-headers (Ubuntu)
Status: New => Confirmed
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Okay, after some digging I managed to make it run.
The problem was just that the kernel source couldn't be located despite
having it already in /usr/src
by unpacking the content of kernel-source-5.4.0.tar.bz2 to a fake linux-
headers-5.4.0-1018 directory and copying extra config files etc from th
