[unable to build zfs module on buster rockchip64]

On 10/10/2020 at 12:47 AM, turkerali said:

 

Yes, I am using the linux-image-current-rockchip64 (5.8.x) on nanopc-t4.

 

There is one more possibility that might have resolved the issue for me. When you install the "linux-headers" package, apt runs "make scripts" command at the end of installation,

which builds some helper utilities inside the linux-headers package. I believe these helper utilities are responsible for module compilation and the "modpost" errors.

 

As a workaround, before you install the linux-headers package, make sure to upgrade the gcc version to gcc-9 or gcc-10 from ppa:ubuntu-toolchain-r/test repo.

Then install the linux-headers package. If you do this, the binary utilites in the scripts folder will be built with the upgraded gcc, and will be able to build & link the zfs modules.

 

I may be wrong, but it's worth trying.

 

Thanks @turkerali! Recompiling the kernel headers with GCC-10 fixed the issue.

[unable to build zfs module on buster rockchip64]

9 hours ago, turkerali said:

I am using Armbian Bionic. I have upgraded the GCC from ppa:ubuntu-toolchain-r/test repo to gcc-10, but I was having the same error message until today:

 

ERROR: modpost: "__stack_chk_guard" [/root/zfs/zfs-0.8.5/module/zfs/zfs.ko] undefined!
ERROR: modpost: "__stack_chk_guard" [/root/zfs/zfs-0.8.5/module/zcommon/zcommon.ko] undefined!
...

 

Today Armbian upgraded the kernel&header package (#20.08.8) and zfs compiles without any errors. I checked the changelog from https://docs.armbian.com/Release_Changelog/

but could not see any related changes. Most probably Armbian is now building the kernel with a newer GCC version, because I did not change anything since the build failed.

 

@turkerali

Which kernel package are you using? linux-image-current-rockchip64? I am not able to compile with the "current" kernel, but the "legacy" kernel has always worked.

[unable to build zfs module on buster rockchip64]

@jbergler I am building the latest ZFS release 0.8.5 with GCC-9 and GCC-10 on Armbian bionic and the issue still occurs. Have you tried a build with GCC-9/10?

[unable to build zfs module on buster rockchip64]

I am running Armbian bionic and installed gcc-9 and gcc-10 from "ppa:ubuntu-toolchain-r/test". I tried both compilers with dkms and am still getting

ERROR: modpost: "__stack_chk_guard" [/root/zfs/module/zfs/zfs.ko] undefined!

 

I set the compiler version by exporting `CC`, but I don't see any mention of the compiler version in the DKMS build output. The make.log does show different compiler warnings, so I'm pretty sure I am successfully setting the compiler version.

[Downgrade linux-image-current-rockchip64]

Hey RussianNeuroMancer,

 

Thanks for the .debs! Do you have the linux-headers-current-rockchip64=20.05.7 by chance? I need the headers to compile the zfs kernel module. The good thing is the legacy kernel is still available so I am back on 4.4 with zfs support enabled.

[Downgrade linux-image-current-rockchip64]

Hey All,

 

I am running a rockpro64 and updated my kernel to 5.7 (linux-image-current-rockchip64 package), but I am not able to run ZFS any longer because ZFS/0.8.4 does not support 5.7 kernel and ZFS/2.0.0rc1 dkms gives me a build failure with linux-image-current-rockchip64 v20.08 (symbol "__stack_chk_guard" is undefined). I was able to build ZFS/2.0.0rc1 with linux-image-current-rockchip64=20.05.7. I am not able to downgrade my kernel because the apt-cache only shows the latest version of linux-image-current-rockchip64 available. Any suggestions on where I can get the old linux-image-current-rockchip64 package (v20.05.7)?

 

Thanks in advance guys, love the work done here.

 

~Brocklobsta