Kernel build gets stuck in a endless loop

Kernel build gets stuck in a endless loop

[Christian Ege]

Hi,

can anyone give me some advice how to debug an endless loop during
kernel and module recipes with my UDOO Neo support layer?

https://github.com/graugans/meta-fsl-arm-extra/tree/master-udooneo

When I build the kernel for the UDOO Neo kernel or a module with bitbake
the bitbake process hangs in an endless loop:


bitbake -v kernel-module-imx-gpu-viv

+ cd
/data/FSL/fsl-community-bsp-master/build/tmp/work/udooneo-poky-linux-gnueabi/kernel-module-imx-gpu-viv/5.0.11.p7.1+fslc+gitAUTOINC+eeeb23c0fb-r0/git
+ do_make_scripts
+ unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS
+ make CC=arm-poky-linux-gnueabi-gcc  -mno-thumb-interwork -marm
-fuse-ld=bfd LD=arm-poky-linux-gnueabi-ld.bfd
AR=arm-poky-linux-gnueabi-ar  -C
/data/FSL/fsl-community-bsp-master/build/tmp/work-shared/udooneo/kernel-source
O=/data/FSL/fsl-community-bsp-master/build/tmp/work-shared/udooneo/kernel-build-artifacts
scripts

make: Entering directory
'/data/FSL/fsl-community-bsp-master/build/tmp/work-shared/udooneo/kernel-source'

  GEN
/data/FSL/fsl-community-bsp-master/build/tmp/work-shared/udooneo/kernel-build-artifacts/Makefile

scripts/kconfig/conf --silentoldconfig Kconfig

  GEN
/data/FSL/fsl-community-bsp-master/build/tmp/work-shared/udooneo/kernel-build-artifacts/Makefile

scripts/kconfig/conf --silentoldconfig Kconfig

  GEN     /data/FSL/fsl-community-bsp-master/build/tmp/work-shared

For the kernel I can workaround this by adding the following line to the
recipe:

    B = "${S}"

But this does not work for kernel module recipes like the
"kernel-module-imx-gpu-viv"

Maybe the cause of this issues is due to the fact that they have
included the backports subdirectory into their kernel?

https://github.com/UDOOboard/linux_kernel/tree/imx_3.14.28_1.0.0_ga_neo/backports

I already added some debugging code to the conf utility but it looks
like it does what it is supposed to do. But  I guess the surrounding
Makefile is not happy.


Regards,
Christian

Re: Kernel build gets stuck in a endless loop

[Christian Ege]

Hi,

Thanks to Guiseppe Pagano, there is a solution for this issue. It is
more a hot fix than a real solution but this is maybe for someone else
helpful.

> Hi Crhistian,
> It is not a clean patch, but it works for me.
> 
> File:    kernel_imx_3.14/Makefile
> 
> - $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
> + if [[ ! -e include/config/auto.conf ]]; then $(MAKE) -f
> $(srctree)/Makefile silentoldconfig ; fi
> 
> In this way:
> 
> 
> # If .config is newer than include/config/auto.conf, someone tinkered
> # with it and forgot to run make oldconfig.
> # if auto.conf.cmd is missing then we are probably in a cleaned tree so
> # we execute the config step to be sure to catch updated Kconfig files
> include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
>         if [[ ! -e include/config/auto.conf ]]; then $(MAKE) -f
> $(srctree)/Makefile silentoldconfig ; fi
> #       $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
> else
> # external modules needs include/generated/autoconf.h and
> include/config/auto.conf
> # but do not care if they are up-to-date. Use auto.conf to trigger the test
> PHONY += include/config/auto.conf
> 
> I had a similar problem during Android 5.0 build process, ad this patch
> solves. Hope it will the same for you.
> 
> If it works I'll pass the patch to udooneo Team.
I've added this to my UDOO layer in a slightly modified version:

https://github.com/graugans/meta-udoo/blob/jethro/recipes-kernel/linux/linux-udooboard/0003-avoid-endless-loop.patch

Regards,
Christian

> 
> Bye
> Giuseppe
> 
> 
> 
> 2016-01-03 19:14 GMT+01:00 Christian Ege <k4230r6@gmail.com
> <mailto:k4230r6@gmail.com>>:
> 
>     Hi Giuseppe,
> 
>     Am 03.01.2016 7:08 nachm. schrieb "Giuseppe Pagano"
>     >
>     > Did you solved ?
>     I did a little investigation but did not finally succeeded.
>     > Maybe I have a patch for you.
>     >
>     This would be awesome.
> 
>     Regards,
>     Christian
> 
> 
>     >
>     >
>     > Christian Ege k4230r6 at gmail.com <http://gmail.com> 
>     > Sun Nov 29 12:24:50 PST 2015
>     >
>     > Previous message: [yocto] [meta-security][PATCH] nmap: package
>     update to 7.0
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>     name list
>     > Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
>     > ________________________________
>     >
>     > Hi,
>     >
>     > can anyone give me some advice how to debug an endless loop during
>     > kernel and module recipes with my UDOO Neo support layer?
>     >
>     > https://github.com/graugans/meta-fsl-arm-extra/tree/master-udooneo
>     >
>     > When I build the kernel for the UDOO Neo kernel or a module with
>     bitbake
>     > the bitbake process hangs in an endless loop:
>     >
>     >
>     > bitbake -v kernel-module-imx-gpu-viv
>     >
>     > + cd
>     >
>     /data/FSL/fsl-community-bsp-master/build/tmp/work/udooneo-poky-linux-gnueabi/kernel-module-imx-gpu-viv/5.0.11.p7.1+fslc+gitAUTOINC+eeeb23c0fb-r0/git
>     > + do_make_scripts
>     > + unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS
>     > + make CC=arm-poky-linux-gnueabi-gcc  -mno-thumb-interwork -marm
>     > -fuse-ld=bfd LD=arm-poky-linux-gnueabi-ld.bfd
>     > AR=arm-poky-linux-gnueabi-ar  -C
>     >
>     /data/FSL/fsl-community-bsp-master/build/tmp/work-shared/udooneo/kernel-source
>     >
>     O=/data/FSL/fsl-community-bsp-master/build/tmp/work-shared/udooneo/kernel-build-artifacts
>     > scripts
>     >
>     > make: Entering directory
>     >
>     '/data/FSL/fsl-community-bsp-master/build/tmp/work-shared/udooneo/kernel-source'
>     >
>     >   GEN
>     >
>     /data/FSL/fsl-community-bsp-master/build/tmp/work-shared/udooneo/kernel-build-artifacts/Makefile
>     >
>     > scripts/kconfig/conf --silentoldconfig Kconfig
>     >
>     >   GEN
>     >
>     /data/FSL/fsl-community-bsp-master/build/tmp/work-shared/udooneo/kernel-build-artifacts/Makefile
>     >
>     > scripts/kconfig/conf --silentoldconfig Kconfig
>     >
>     >   GEN     /data/FSL/fsl-community-bsp-master/build/tmp/work-shared
>     >
>     > For the kernel I can workaround this by adding the following line
>     to the
>     > recipe:
>     >
>     >     B = "${S}"
>     >
>     > But this does not work for kernel module recipes like the
>     > "kernel-module-imx-gpu-viv"
> 
>