From: Michael Olbrich <m.olbrich@pengutronix.de>
To: Ian Abbott <abbotti@mev.co.uk>
Cc: ptxdist@pengutronix.de
Subject: Re: [ptxdist] Getting error 'kernel' must depend on 'host-system-python3' for 'python3'!
Date: Thu, 28 Mar 2024 16:04:01 +0100 [thread overview]
Message-ID: <ZgWG4Uz-hvmN0MJ9@pengutronix.de> (raw)
In-Reply-To: <85d8e9a2-60fc-45cf-87e0-ffabf1508baf@mev.co.uk>
On Thu, Mar 28, 2024 at 10:59:43AM +0000, Ian Abbott wrote:
> 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.
Right, so we need a host-pahole package and select it as well.
Regards,
Michael
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prev parent reply other threads:[~2024-03-28 15:04 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
2024-03-28 11:36 ` Ian Abbott
2024-03-28 11:52 ` Ian Abbott
2024-03-28 15:04 ` Michael Olbrich [this message]
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