Bug 3787

Summary: unable to build external kernel modules with linux-yocto 3.4
Product: [Build System, Metadata & Runtime] OE-Core Reporter: Khem Raj <raj.khem>
Component: kernelAssignee: Darren Hart <dvhart>
Status: RESOLVED FIXED QA Contact:
Severity: normal    
Priority: Medium+ CC: bruce.ashfield, tom.zanussi
Version: 1.4   
Target Milestone: 1.4 M4   
Hardware: All   
OS: Multiple   
Whiteboard:
OS type for building Yocto: --- Type of Regression: ---
Verified: Documentation change: ---

Description Khem Raj 2013-01-24 05:19:03 UTC 
I have a kernel module which uses Kbuild infra and expects it from prebuild kernel tree in staging area. I am building it using a recipe for it. However the problem is that the prebuilt kernel staged in staging area does not have scripts/ dir which is prebuilt so the module ends up with errors like

yocto/poky/build/tmp-eglibc/sysroots/qemux86-64/usr/src/kernel/scripts/recordmcount: No such file or directory

I think we are removing quite a bit with 

make -C $kerneldir _mrproper_scripts from kernel.bbclass

that the resulting tree is not good enough for cross building external modules.
Comment 1 Darren Hart 2013-01-24 05:55:20 UTC 
The reason we clean scripts is that the binaries there are for the host and should not be deployed to the target. If you inherit from module.bbclass, it should be running do_make_scripts() to account for this.
Comment 2 Khem Raj 2013-01-24 06:16:17 UTC 
yes I am inheriting module.bbclass using

inherit module

in the external module recipe but I also pass

EXTRA_OEMAKE = "-C ${STAGING_KERNEL_DIR}  M=${B} prefix=${D}"
MAKE_TARGETS = "modules"

is MAKE_TARGETS definition an issue with do_make_scripts ?
Comment 3 Khem Raj 2013-01-27 06:57:22 UTC 
OK I have found the issue and posted a patch to fix it. 

http://lists.linuxtogo.org/pipermail/openembedded-core/2013-January/034951.html
Comment 4 Darren Hart 2013-02-28 05:01:58 UTC 
commit 62285873e2a6b9375a96a3de7a500205aeb18fb3
Author: Khem Raj <raj.khem@gmail.com>
Date:   Sat Jan 26 22:20:45 2013 -0800

    module-base.bbclass: Call make instead of oe_runmake in do_make_scripts