[yocto] fido: out-of-tree module build fails due to wrong Module.symvers reference

Sun May 3 09:16:19 PDT 2015

Dear yocto developers,

the following "more generic" workaround worked also, which let's me 
assume that the "Module.symvers" in ${S} is somehow broken?

Content of "linux-yocto_3.19.bbappend":
do_install_append() {
     cp -f ${KBUILD_OUTPUT}/Module.symvers ${STAGING_KERNEL_BUILDDIR}
}

Greetings,
Timo

On 03.05.2015 17:26, Timo Korthals wrote:
> Dear yocto developers,
>
> with the yocto projects < 1.8 we were able to build our out-of-tree 
> module without any linking failures, but since the upgrade to 1.8 
> there seems to be something wrong with the "Module.symvers".
> For our external module we use exactly the same Makefile as you 
> proposed in hello-mod (but of course with another obj-m argument).
> If we then build the module, the do_compile stage prints, what you can 
> find under [1].
> I think the problem refers to a wrong "Module.symvers" which is used 
> by the MODPOST stage.
>
> I just searched for all "Module.symvers" files in my fido work folder, 
> after a full build:
> -rw-r--r-- 1 myName staff 528483 Apr 29 17:59 
> /home/myName/fido/tmp/work/amiro-poky-linux-gnueabi/linux-yocto/3.19.2+gitAUTOINC+9e70b482d3_31b35da6a5-r0/linux-amiro-standard-build/Module.symvers
> -rw-r--r-- 1 myName staff      0 May  3 16:22 
> /home/myName/fido/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/Module.symvers
> -rw-r--r-- 1 myName staff 386012 Apr 29 17:58 
> /home/myName/fido/tmp/work-shared/amiro/kernel-build-artifacts/Module.symvers
>
> In my old (projects < 1.8) workfolder, the "Module.symvers" files, 
> where distributed as follows:
> -rw-r--r-- 4 myName staff 528483 Mar 11 13:48 
> /home/myName/tmp/sysroots/amiro/usr/src/kernel/Module.symvers
> -rw-r--r-- 4 myName staff 528483 Mar 11 13:48 
> /home/myName/tmp/work/amiro-poky-linux-gnueabi/linux-yocto/3.19+gitAUTOINC+8897ef68b3_bfa76d4957-r0/image/usr/src/kernel/Module.symvers
> -rw-r--r-- 4 myName staff 528483 Mar 11 13:48 
> /home/myName/tmp/work/amiro-poky-linux-gnueabi/linux-yocto/3.19+gitAUTOINC+8897ef68b3_bfa76d4957-r0/linux-amiro-standard-build/Module.symvers
> -rw-r--r-- 2 myName staff 528483 Mar 11 13:48 
> /home/myName/tmp/work/amiro-poky-linux-gnueabi/linux-yocto/3.19+gitAUTOINC+8897ef68b3_bfa76d4957-r0/packages-split/kernel-dev/usr/src/kernel/Module.symvers
> -rw-r--r-- 2 myName staff 528483 Mar 11 13:48 
> /home/myName/tmp/work/amiro-poky-linux-gnueabi/linux-yocto/3.19+gitAUTOINC+8897ef68b3_bfa76d4957-r0/package/usr/src/kernel/Module.symvers
> -rw-r--r-- 4 myName staff 528483 Mar 11 13:48 
> /home/myName/tmp/work/amiro-poky-linux-gnueabi/linux-yocto/3.19+gitAUTOINC+8897ef68b3_bfa76d4957-r0/sysroot-destdir/usr/src/kernel/Module.symvers
> -rw-r--r-- 1 myName staff 0 Mar  3 10:08 
> /home/tkorthals/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/ov5647/Module.symvers
> -rw-r--r-- 1 myName staff      0 Mar  3 10:08 
> /home/myName/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/ov5647/Module.symvers
>
> A small hotfix to solve my problem is just a copy of the 
> "Module.symvers" from the kernel build into my source folder of the 
> module, by the following extension in my "ov5647.bb":
> # Copy the fiel containing all kernel modules
> do_patchappend() {
>     cp -f 
> /home/myName/fido/tmp/work/amiro-poky-linux-gnueabi/linux-yocto/3.19.2+gitAUTOINC+9e70b482d3_31b35da6a5-r0/linux-amiro-standard-build/Module.symvers 
> ${S}
> }
> addtask patchappend after do_configure before do_compile
>
> If I take the "Module.symvers" from 
> "kernel-build-artifacts/Module.symvers", the linkage fails because all 
> the symbols are missing which are important for the module.
> Do you have any Idea, if this is a bug in the new 1.8 build 
> environment, or if I am doing something wrong?
>
> Greetings,
> Timo
>
>
>
> [1]
>
> + module_do_compile
> + unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS
> + oe_runmake 
> KERNEL_PATH=/home/myHome/fido/tmp/work-shared/amiro/kernel-source 
> KERNEL_VERSION=3.19.2-yocto-standard 'CC=arm-poky-linux-gnueabi-gcc  ' 
> 'LD=arm-poky-linux-gnueabi-ld.bfd  ' 'AR=arm-poky-linux-gnueabi-ar ' 
> O=/mnt$
> + oe_runmake_call 
> KERNEL_PATH=/home/myHome/fido/tmp/work-shared/amiro/kernel-source 
> KERNEL_VERSION=3.19.2-yocto-standard 'CC=arm-poky-linux-gnueabi-gcc  ' 
> 'LD=arm-poky-linux-gnueabi-ld.bfd  ' 'AR=arm-poky-linux-gnueabi-ar ' O$
> + bbnote make -j 8 -e MAKEFLAGS= 
> KERNEL_SRC=/home/myHome/fido/tmp/work-shared/amiro/kernel-source 
> KERNEL_PATH=/home/myHome/fido/tmp/work-shared/amiro/kernel-source 
> KERNEL_VERSION=3.19.2-yocto-standard 'CC=arm-poky-$
> + echo 'NOTE: make -j 8 -e MAKEFLAGS= 
> KERNEL_SRC=/home/myHome/fido/tmp/work-shared/amiro/kernel-source 
> KERNEL_PATH=/home/myHome/fido/tmp/work-shared/amiro/kernel-source 
> KERNEL_VERSION=3.19.2-yocto-standard CC=arm-p$
> NOTE: make -j 8 -e MAKEFLAGS= 
> KERNEL_SRC=/home/myHome/fido/tmp/work-shared/amiro/kernel-source 
> KERNEL_PATH=/home/myHome/fido/tmp/work-shared/amiro/kernel-source 
> KERNEL_VERSION=3.19.2-yocto-standard CC=arm-poky-linu$
> + make -j 8 -e MAKEFLAGS= 
> KERNEL_SRC=/home/myHome/fido/tmp/work-shared/amiro/kernel-source 
> KERNEL_PATH=/home/myHome/fido/tmp/work-shared/amiro/kernel-source 
> KERNEL_VERSION=3.19.2-yocto-standard 'CC=arm-poky-linux-g$
>
> make[1]: Entering directory 
> `/home/myHome/fido/tmp/work-shared/amiro/kernel-source'
>
> make[2]: Entering directory 
> `/home/myHome/fido/tmp/work-shared/amiro/kernel-build-artifacts'
>
>   LD 
> /home/myHome/fido/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/built-in.o
>
>   CC [M] 
> /home/myHome/fido/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/ov5647.o
>
>   Building modules, stage 2.
>
>   MODPOST 1 modules
>
> WARNING: "v4l2_ctrl_handler_setup" 
> [/home/myHome/fido/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/ov5647.ko] 
> undefined!
> WARNING: "__v4l2_ctrl_s_ctrl_int64" 
> [/home/myHome/fido/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/ov5647.ko] 
> undefined!
> WARNING: "v4l2_ctrl_handler_free" 
> [/home/myHome/fido/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/ov5647.ko] 
> undefined!
> WARNING: "media_entity_init" 
> [/home/myHome/fido/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/ov5647.ko] 
> undefined!
> WARNING: "v4l2_i2c_subdev_init" 
> [/home/myHome/fido/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/ov5647.ko] 
> undefined!
> WARNING: "v4l2_ctrl_new_std_menu_items" 
> [/home/myHome/fido/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/ov5647.ko] 
> undefined!
> WARNING: "v4l2_ctrl_new_std_menu" 
> [/home/myHome/fido/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/ov5647.ko] 
> undefined!
> WARNING: "v4l2_ctrl_new_std" 
> [/home/myHome/fido/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/ov5647.ko] 
> undefined!
> WARNING: "v4l2_ctrl_handler_init_class" 
> [/home/myHome/fido/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/ov5647.ko] 
> undefined!
> WARNING: "media_entity_cleanup" 
> [/home/myHome/fido/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/ov5647.ko] 
> undefined!
> WARNING: "v4l2_device_unregister_subdev" 
> [/home/myHome/fido/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/ov5647.ko] 
> undefined!
>
>   CC 
> /home/myHome/fido/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/ov5647.mod.o
>
>   LD [M] 
> /home/myHome/fido/tmp/work/amiro-poky-linux-gnueabi/ov5647/0.0-r0/ov5647.ko
>
> make[2]: Leaving directory 
> `/home/myHome/fido/tmp/work-shared/amiro/kernel-build-artifacts'
>
> make[1]: Leaving directory 
> `/home/myHome/fido/tmp/work-shared/amiro/kernel-source'
>
> + ret=0
> + trap '' 0
> + exit 0
>
> -- 
>
> Timo Korthals, M.Sc.
> Universität Bielefeld
> AG Kognitronik & Sensorik
> Exzellenzcluster Cognitive Interaction Technology (CITEC)
> Inspiration 1 (Zehlendorfer Damm 199)
> 33619 Bielefeld - Germany
>
> Office  : 3.037
> Phone   : +49 521 106-67368
> eMail   : myHome at cit-ec.uni-bielefeld.de
> Internet: http://www.ks.cit-ec.uni-bielefeld.de/
>
>
>

-- 

Timo Korthals, M.Sc.
Universität Bielefeld
AG Kognitronik & Sensorik
Exzellenzcluster Cognitive Interaction Technology (CITEC)
Inspiration 1 (Zehlendorfer Damm 199)
33619 Bielefeld - Germany

Office  : 3.037
Phone   : +49 521 106-67368
eMail   : tkorthals at cit-ec.uni-bielefeld.de
Internet: http://www.ks.cit-ec.uni-bielefeld.de/

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