From: Ian Abbott <abbotti@mev.co.uk>
To: ptxdist@pengutronix.de
Subject: Re: [ptxdist] Getting error 'kernel' must depend on 'host-system-python3' for 'python3'!
Date: Thu, 28 Mar 2024 10:59:43 +0000 [thread overview]
Message-ID: <85d8e9a2-60fc-45cf-87e0-ffabf1508baf@mev.co.uk> (raw)
In-Reply-To: <ZgUmB_o911YDK_Ut@pengutronix.de>
On 28/03/2024 08:10, Michael Olbrich wrote:
> On Wed, Mar 27, 2024 at 05:17:21PM +0000, Ian Abbott wrote:
>> I'm getting this error when trying to build a kernel that has "Kernel
>> hacking > Compile-time checks and compiler options > Generate BTF typeinfo
>> (DEBUG_INFO_BTF)" enabled in the configuration:
>>
>> --------------------------------------------------------------------
>> ----------------------
>> target: kernel.compile
>> ----------------------
>>
>> make: Entering directory '/mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21'
>> make[1]: Entering directory '/mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21-build'
>> GEN Makefile
>> DESCEND bpf/resolve_btfids
>> CALL /mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21/scripts/checksyscalls.sh
>> GEN /mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21-build/tools/bpf/resolve_btfids/libbpf/bpf_helper_defs.h
>> INSTALL libsubcmd_headers
>>
>> 'kernel' must depend on 'host-system-python3' for 'python3'!
>>
>> make[5]: *** [Makefile:160: /mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21-build/tools/bpf/resolve_btfids/libbpf/bpf_helper_defs.h]
>> Error 1
>> make[5]: *** Deleting file '/mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21-build/tools/bpf/resolve_btfids/libbpf/bpf_helper_defs.h'
>> make[4]: *** [Makefile:63: /mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21-build/tools/bpf/resolve_btfids//libbpf/libbpf.a]
>> Error 2
>> make[4]: *** Waiting for unfinished jobs....
>> make[3]: *** [Makefile:76: bpf/resolve_btfids] Error 2
>> make[2]: *** [/mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21/Makefile:1355:
>> tools/bpf/resolve_btfids] Error 2
>> make[1]: *** [/mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21/Makefile:234:
>> __sub-make] Error 2
>> make[1]: Leaving directory '/mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21-build'
>> make: *** [Makefile:234: __sub-make] Error 2
>> make: Leaving directory '/mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21'
>> make: *** [/mnt/lindata/work/abbotti/ptxdist/ptxdist/ptxdist_git/ptxdist/rules/kernel.make:251: /home/abbotti/work/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/state/kernel.compile]
>> Error 2
>> --------------------------------------------------------------------
>>
>> I could live without it. It is required for RestrictFileSystems= in systemd
>> service units according to
>> <https://github.com/systemd/systemd/blob/main/README>. But is there an easy
>> fix?
>
> Put this in "platforms/kernel.fixup.in" in your BSP:
> ------------------------------->8----------------------------
> ## SECTION=base_kernel
>
> config KERNEL
> select HOST_SYSTEM_PYTHON3
>
> ------------------------------->8----------------------------
>
>> I'm currently using ptxdist 2024.03.0 but is also reproducible on the
>> ptxdist master branch.
>
> We should add that dependency Upstream as well. Something like
>
> config KERNEL_PYTHON3
> prompt "ensure Python3 is available"
> bool
> help
> Python3 is needed at build-time when CONFIG_DEBUG_INFO_BTF is
> enabled.
Thanks. I combined the two and added the following to
"platforms/kernel.fixup.in" in my BSP:
------------------------------->8----------------------------
## SECTION=base_kernel
config KERNEL
select HOST_SYSTEM_PYTHON3 if KERNEL_PYTHON3
config KERNEL_PYTHON3
prompt "ensure Python3 is available"
bool
select HOST_SYSTEM_PYTHON3
help
Python3 is needed at build-time when CONFIG_DEBUG_INFO is
enabled
------------------------------->8----------------------------
Then I enabled KERNEL_PYTHON3 in my platformconfig.
The kernel build gets further than before, but stops here:
------------------------------->8----------------------------
----------------------
target: kernel.compile
----------------------
make: Entering directory
'/mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21'
make[1]: Entering directory
'/mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21-build'
GEN Makefile
DESCEND bpf/resolve_btfids
CALL
/mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21/scripts/checksyscalls.sh
INSTALL libsubcmd_headers
UPD include/generated/utsversion.h
CC init/version-timestamp.o
BTF: .tmp_vmlinux.btf: pahole (false) is not available
Failed to generate BTF for vmlinux
Try to disable CONFIG_DEBUG_INFO_BTF
make[3]: ***
[/mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21/scripts/Makefile.vmlinux:37:
vmlinux] Error 1
make[2]: ***
[/mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21/Makefile:1165:
vmlinux] Error 2
make[1]: ***
[/mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21/Makefile:234:
__sub-make] Error 2
make[1]: Leaving directory
'/mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21-build'
make: *** [Makefile:234: __sub-make] Error 2
make: Leaving directory
'/mnt/lindata/work/abbotti/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/build-target/linux-6.6.21'
make: ***
[/mnt/lindata/work/abbotti/ptxdist/ptxdist/releases/ptxdist-2024.03.0/rules/kernel.make:251:
/home/abbotti/work/ptxdist/projects/its-ipt4-demo/platform-its-ipt4-demo/state/kernel.compile]
Error 2
------------------------------->8----------------------------
I guess that is because of these lines in the upstream "rules/kernel.make":
------------------------------->8----------------------------
KERNEL_SHARED_OPT = \
$(KERNEL_MODULE_OPT) \
PAHOLE=false
------------------------------->8----------------------------
So it would probably require more work to upstream to support the
CONFIG_DEBUG_INFO_BTF kernel option in ptxdist.
Kind regards,
Ian
--
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next prev parent reply other threads:[~2024-03-28 11:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-27 17:17 Ian Abbott
2024-03-28 8:10 ` Michael Olbrich
2024-03-28 10:59 ` Ian Abbott [this message]
2024-03-28 11:36 ` Ian Abbott
2024-03-28 11:52 ` Ian Abbott
2024-03-28 15:04 ` Michael Olbrich
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