Consider adding pahole to Depends of kernel-header packages? (Was: Re: Bug#1098779: zfs-dkms: zfs/2.3.0 fails to build with kenel 6.12.16-amd64)

[Shengqi Chen <harry@debian.org>]

Hi,

Thanks for reporting this.

> 2025年2月24日 08:30，Jean-Francois Pirus <jfp@clearfield.com> 写道：
> 
> 
> Actually underlying issue might be this, from the config.log:
> 
> 
> configure:4776: $? = 0
> configure:4765: x86_64-linux-gnu-gcc-14 -V >&5
> x86_64-linux-gnu-gcc-14: error: unrecognized command-line option '-V'
> x86_64-linux-gnu-gcc-14: fatal error: no input files
> compilation terminated.

The issue in configure.log would appear just before the error, so
these are not related to your issue. The actual check is [1].

zfs-linux is tested against zfs version in testing, currently 6.12.12.
For newly uploaded 6.12.16-1, zfs-linux indeed fails to compile [2],
with the same error as you on your non-Debian kernel:

859s checking whether CONFIG_MODULES is defined... no 
859s configure: error: 
859s *** This kernel does not include the required loadable module 
859s *** support! 
859s ***

> Ok, found it, there's an unlisted dependency on pahole
> 
> The fix is
> apt install pahole


nvidia-driver is also broken, and can also be solved by installing pahole.

There is similar report in Arch Linux [3]. So we may also need pahole
in the Depends field of linux-xxx-headers package (looping kernel team
in for this). 

[1]: https://github.com/openzfs/zfs/blob/523e3adac9c0831df30f45342f7a9a55e11e45c7/config/kernel-config-defined.m4#L104-L129
[2]: https://ci.debian.net/packages/z/zfs-linux/testing/amd64/58084102/
[3]: https://bugs.archlinux.org/task/69654

-- 
Thanks,
Shengqi Chen