Hello,

at the moment I strongly recommend to build mainline kenel on
Tumbleweed. Some toolchain features that are required by the recent
kernels are not yet available on Leap.

That is one potential source of errors. Broken source or configuration
is another.

If you do not want to deal with git you can also branch from the
Kernel:stable:Backport project in OBS and only change the config.

Note however that the config changes as the kernel is updated so such
frankenpackage will break soon.

HTH

Michal

On Mon, Sep 06, 2021 at 12:32:19PM -0000, GP Samu wrote:
> All,
> 
> I've hit an issue this past weekend trying to compile a custom kernel based 
> on the OpenSUSE stable branch with CONFIG_VFIO_FSL_MC enabled (for NXP QorIQ) 
> on aarch64. This is in order to support passthrough of DPAA2 containers to 
> VMs on a system with a LS1088 processor.   
> 
> My build host: 
> 
> OpenSUSE LEAP 15.3 (aarch64)
> 
> rock:~ # uname -a
> Linux rock 5.3.18-59.19-default #1 SMP Tue Aug 3 14:11:23 UTC 2021 (055c4fd) 
> aarch64 aarch64 aarch64 GNU/Linux
> 
> rock:~/kernel # gcc --version
> gcc (SUSE Linux) 7.5.0
> Copyright (C) 2017 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions.  There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> 
> Checkout stable branch: 
> 
> rock:~ #  git clone https://github.com/SUSE/kernel -b stable
> Cloning into 'kernel'...
> remote: Enumerating objects: 11355151, done.
> remote: Counting objects: 100% (84628/84628), done.
> remote: Compressing objects: 100% (26754/26754), done.
> remote: Total 11355151 (delta 60838), reused 73774 (delta 57756), pack-reused 
> 11270523
> Receiving objects: 100% (11355151/11355151), 2.37 GiB | 10.37 MiB/s, done.
> Resolving deltas: 100% (9666658/9666658), done.
> Checking objects: 100% (33554432/33554432), done.
> Updating files: 100% (72873/72873), done.
> 
> Configuration step.  Here I've enabled CONFIG_VFIO_FSL_MC=m here after loading
> /boot/config-5.3.18-59.19-default
> 
> rock:~/kernel # make menuconfig
>   HOSTCC  scripts/basic/fixdep
>   UPD     scripts/kconfig/mconf-cfg
>   HOSTCC  scripts/kconfig/mconf.o
>   HOSTCC  scripts/kconfig/lxdialog/checklist.o
>   HOSTCC  scripts/kconfig/lxdialog/inputbox.o
>   HOSTCC  scripts/kconfig/lxdialog/menubox.o
>   HOSTCC  scripts/kconfig/lxdialog/textbox.o
>   HOSTCC  scripts/kconfig/lxdialog/util.o
>   HOSTCC  scripts/kconfig/lxdialog/yesno.o
>   HOSTCC  scripts/kconfig/confdata.o
>   HOSTCC  scripts/kconfig/expr.o
>   LEX     scripts/kconfig/lexer.lex.c
>   YACC    scripts/kconfig/parser.tab.[ch]
>   HOSTCC  scripts/kconfig/lexer.lex.o
>   HOSTCC  scripts/kconfig/menu.o
>   HOSTCC  scripts/kconfig/parser.tab.o
>   HOSTCC  scripts/kconfig/preprocess.o
>   HOSTCC  scripts/kconfig/symbol.o
>   HOSTCC  scripts/kconfig/util.o
>   HOSTLD  scripts/kconfig/mconf
> #
> # using defaults found in /boot/config-5.3.18-59.19-default
> #
> configuration written to .config
> 
> *** End of the configuration.
> *** Execute 'make' to start the build or try 'make help'.
> 
> Start build
> 
> rock:~/kernel # make -j4
>   WRAP    arch/arm64/include/generated/uapi/asm/errno.h
>   WRAP    arch/arm64/include/generated/uapi/asm/kvm_para.h
>   WRAP    arch/arm64/include/generated/uapi/asm/ioctls.h
>   WRAP    arch/arm64/include/generated/uapi/asm/ioctl.h
>   WRAP    arch/arm64/include/generated/uapi/asm/ipcbuf.h
>   WRAP    arch/arm64/include/generated/uapi/asm/msgbuf.h
>   WRAP    arch/arm64/include/generated/uapi/asm/poll.h
>   WRAP    arch/arm64/include/generated/uapi/asm/resource.h
>   WRAP    arch/arm64/include/generated/uapi/asm/sembuf.h
>   WRAP    arch/arm64/include/generated/uapi/asm/shmbuf.h
>   WRAP    arch/arm64/include/generated/uapi/asm/siginfo.h
>   WRAP    arch/arm64/include/generated/uapi/asm/socket.h
>   WRAP    arch/arm64/include/generated/uapi/asm/sockios.h
>   WRAP    arch/arm64/include/generated/uapi/asm/stat.h
>   WRAP    arch/arm64/include/generated/uapi/asm/swab.h
>   WRAP    arch/arm64/include/generated/uapi/asm/termbits.h
>   WRAP    arch/arm64/include/generated/uapi/asm/termios.h
>   WRAP    arch/arm64/include/generated/uapi/asm/types.h
> ....
> ....
>   DTC     arch/arm64/boot/dts/qcom/sm8250-mtp.dtb
>   DTC     arch/arm64/boot/dts/qcom/sm8250-sony-xperia-edo-pdx203.dtb
>   DTC     arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revA.dtb
>   DTC     arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revC.dtb
>   DTC     arch/arm64/boot/dts/qcom/sm8250-sony-xperia-edo-pdx206.dtb
>   DTC     arch/arm64/boot/dts/xilinx/zynqmp-zcu106-revA.dtb
>   DTC     arch/arm64/boot/dts/xilinx/zynqmp-zcu111-revA.dtb
>   DTC     arch/arm64/boot/dts/qcom/sm8350-hdk.dtb
>   DTC     arch/arm64/boot/dts/qcom/sm8350-mtp.dtb
> ============= BUILD STOPS HERE - no error is displayed, return to prompt 
> ============= 
> 
> Run make -j4 again - and we see an error building scripts/modpost
> 
> rock:~/kernel # make -j4
>   HOSTLD  scripts/mod/modpost
> /usr/lib64/gcc/aarch64-suse-linux/7/../../../../aarch64-suse-linux/bin/ld: 
> scripts/mod/modpost.o: in function `main':
> modpost.c:(.text.startup+0x61c): undefined reference to `get_next_line'
> /usr/lib64/gcc/aarch64-suse-linux/7/../../../../aarch64-suse-linux/bin/ld: 
> modpost.c:(.text.startup+0x710): undefined reference to `get_next_line'
> collect2: error: ld returned 1 exit status
> make[1]: *** [scripts/Makefile.host:104: scripts/mod/modpost] Error 1
> make: *** [Makefile:1225: prepare0] Error 2
> make: *** Waiting for unfinished jobs....
> 
> rock:~/kernel # ls -la scripts/mod/
> total 460
> drwxr-xr-x 1 root root   814 Sep  6 11:55 .
> drwxr-xr-x 1 root root  4172 Sep  6 11:54 ..
> -rw-r--r-- 1 root root  4739 Sep  6 11:54 .devicetable-offsets.s.cmd
> -rw-r--r-- 1 root root   104 Sep  6 11:54 .elfconfig.h.cmd
> -rw-r--r-- 1 root root  2510 Sep  6 11:54 .empty.o.cmd
> -rw-r--r-- 1 root root   556 Sep  6 11:54 .file2alias.o.cmd
> -rw-r--r-- 1 root root    99 Sep  6 11:51 .gitignore
> -rw-r--r-- 1 root root   104 Sep  6 11:54 .ksym-provides.cmd
> -rw-r--r-- 1 root root   440 Sep  6 11:54 .ksym-provides.o.cmd
> -rw-r--r-- 1 root root   416 Sep  6 11:54 .mk_elfconfig.cmd
> -rw-r--r-- 1 root root   896 Sep  6 11:54 .modpost.o.cmd
> -rw-r--r-- 1 root root   464 Sep  6 11:54 .sumversion.o.cmd
> -rw-r--r-- 1 root root   949 Sep  6 11:51 Makefile
> -rw-r--r-- 1 root root  7438 Sep  6 11:51 devicetable-offsets.c
> -rw-r--r-- 1 root root 16224 Sep  6 11:54 devicetable-offsets.h
> -rw-r--r-- 1 root root 48497 Sep  6 11:54 devicetable-offsets.s
> -rw-r--r-- 1 root root   136 Sep  6 11:54 elfconfig.h
> -rw-r--r-- 1 root root    54 Sep  6 11:51 empty.c
> -rw-r--r-- 1 root root  2248 Sep  6 11:54 empty.o
> -rw-r--r-- 1 root root 45703 Sep  6 11:51 file2alias.c
> -rw-r--r-- 1 root root 56120 Sep  6 11:54 file2alias.o
> -rwxr-xr-x 1 root root 75992 Sep  6 11:54 ksym-provides
> -rw-r--r-- 1 root root  2534 Sep  6 11:51 ksym-provides.c
> -rw-r--r-- 1 root root  5024 Sep  6 11:54 ksym-provides.o
> -rwxr-xr-x 1 root root 75152 Sep  6 11:54 mk_elfconfig
> -rw-r--r-- 1 root root  1269 Sep  6 11:51 mk_elfconfig.c
> -rw-r--r-- 1 root root 71306 Sep  6 11:51 modpost.c
> -rw-r--r-- 1 root root  5934 Sep  6 11:51 modpost.h
> -rw-r--r-- 1 root root 63432 Sep  6 11:54 modpost.o
> -rw-r--r-- 1 root root  9921 Sep  6 11:51 sumversion.c
> -rw-r--r-- 1 root root  7480 Sep  6 11:54 sumversion.o
> 
> Any suggestions or feedback would be appreciated.

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