From mboxrd@z Thu Jan  1 00:00:00 1970
Subject: how to compile kernel module with SDK #compilation
To: meta-freescale@lists.yoctoproject.org
From: hkkim@the-road.co.kr
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Date: Fri, 03 Sep 2021 19:27:41 -0700
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hi

i am not good at English

i have a problem with compiling=C2=A0 a kernel module

a board is imx6sx evk and kernel is 5.10.35 , yocto is hardknott ( is right=
 ? i installed with this command=C2=A0 : repo init -u https://source.codeau=
rora.org/external/imx/imx-manifest
-b imx-linux-hardknott -m imx-5.10.35-2.0.0.xml )

i make SDK form core-image-full_cmdline image=C2=A0 =C2=A0and installed=C2=
=A0 and=C2=A0 compiled kernel and modules ( in kernel directroy) ,a test pr=
ogram=C2=A0 without problems

but when i compile a module which is not in kernel directory

no module.ko file made

the module source is fine=C2=A0 ( i copy a source into kernel/driver and ma=
ke modules ,,it works fine)

and i compiled previous yocto SDK=C2=A0 with success

any tips and ideas will be appreciated . thank in advance

imx6ull@imx6ull-VirtualBox:/media/sf_shared/example/gpio-irq/dev$
imx6ull@imx6ull-VirtualBox:/media/sf_shared/example/gpio-irq/dev$ source /o=
pt/
fsl-imx-wayland/ fsl-imx-xwayland/ VBoxGuestAdditions-5.2.32/
imx6ull@imx6ull-VirtualBox:/media/sf_shared/example/gpio-irq/dev$ source /o=
pt/fsl-imx-
fsl-imx-wayland/ fsl-imx-xwayland/
imx6ull@imx6ull-VirtualBox:/media/sf_shared/example/gpio-irq/dev$ source /o=
pt/fsl-imx-wayland/5.10-hardknott/
environment-setup-cortexa7t2hf-neon-poky-linux-gnueabi sysroots/
site-config-cortexa7t2hf-neon-poky-linux-gnueabi version-cortexa7t2hf-neon-=
poky-linux-gnueabi
imx6ull@imx6ull-VirtualBox:/media/sf_shared/example/gpio-irq/dev$ source /o=
pt/fsl-imx-wayland/5.10-hardknott/environment-setup-cortexa7t2hf-neon-poky-=
linux-gnueabi
imx6ull@imx6ull-VirtualBox:/media/sf_shared/example/gpio-irq/dev$ *make*
*make -C /home/imx6ull/work/Kernel/git.5.10.35 SUBDIRS=3D/media/sf_shared/e=
xample/gpio-irq/dev modules*
*make[1]: Entering directory '/home/imx6ull/work/imx-yocto-bsp/imx6ull/tmp/=
work-shared/imx6ull14x14evk/kernel-source'=C2=A0 =C2=A0--> i don't know why=
 make goes into this directory which i made SDK*
CALL scripts/checksyscalls.sh
CALL scripts/atomic/check-atomics.sh
CHK include/generated/compile.h
make[1]: Leaving directory '/home/imx6ull/work/imx-yocto-bsp/imx6ull/tmp/wo=
rk-shared/imx6ull14x14evk/kernel-source'
imx6ull@imx6ull-VirtualBox:/media/sf_shared/example/gpio-irq/dev$ ls *.ko
*ls: cannot access '*.ko': No such file or directory*
imx6ull@imx6ull-VirtualBox:/media/sf_shared/example/gpio-irq/dev$

and my makefile

obj-m :=3D of-test.o

KDIR :=3D /home/imx6ull/work/Kernel/git.5.10.35
PWD :=3D $(shell pwd)
NFS_ROOT =3D /home/imx6ull/work/imx-yocto-bsp/imx6sx/nfs_full/home/root

default:
$(MAKE) -C $(KDIR) SUBDIRS=3D$(PWD) modules
# cp of-test.ko $(NFS_ROOT)/

clean:
rm -rf *.ko
rm -rf *.mod.*
rm -rf .*.cmd
m -rf *.o

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<br />
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">hi</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">i am not good at English&nbsp;</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">i have a problem with compiling&nbsp; a kernel modu=
le&nbsp;</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">a board is imx6sx evk and kernel is 5.10.35 , yocto=
 is hardknott ( is right ? i installed with this command&nbsp; : repo init =
-u&nbsp;<a style=3D"color: #215bd6; text-decoration-line: underline;" href=
=3D"https://source.codeaurora.org/external/imx/imx-manifest" target=3D"_bla=
nk" rel=3D"nofollow noopener noreferrer">https://source.codeaurora.org/exte=
rnal/imx/imx-manifest</a><br />-b imx-linux-hardknott -m imx-5.10.35-2.0.0.=
xml )</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">i make SDK form core-image-full_cmdline image&nbsp;=
 &nbsp;and installed&nbsp; and&nbsp; compiled kernel and modules ( in kerne=
l directroy) ,a test program&nbsp; without problems</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">but when i compile a module which is not in kernel =
directory</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">no module.ko file made&nbsp;&nbsp;</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">the module source is fine&nbsp; ( i copy a source i=
nto kernel/driver and make modules ,,it works fine)</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">and i compiled previous yocto SDK&nbsp; with succes=
s&nbsp;</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">any tips and ideas will be appreciated . thank in a=
dvance&nbsp;</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">&nbsp;</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">&nbsp;</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">imx6ull@imx6ull-VirtualBox:/media/sf_shared/example=
/gpio-irq/dev$<br />imx6ull@imx6ull-VirtualBox:/media/sf_shared/example/gpi=
o-irq/dev$ source /opt/<br />fsl-imx-wayland/ fsl-imx-xwayland/ VBoxGuestAd=
ditions-5.2.32/<br />imx6ull@imx6ull-VirtualBox:/media/sf_shared/example/gp=
io-irq/dev$ source /opt/fsl-imx-<br />fsl-imx-wayland/ fsl-imx-xwayland/<br=
 />imx6ull@imx6ull-VirtualBox:/media/sf_shared/example/gpio-irq/dev$ source=
 /opt/fsl-imx-wayland/5.10-hardknott/<br />environment-setup-cortexa7t2hf-n=
eon-poky-linux-gnueabi sysroots/<br />site-config-cortexa7t2hf-neon-poky-li=
nux-gnueabi version-cortexa7t2hf-neon-poky-linux-gnueabi<br />imx6ull@imx6u=
ll-VirtualBox:/media/sf_shared/example/gpio-irq/dev$ source /opt/fsl-imx-wa=
yland/5.10-hardknott/environment-setup-cortexa7t2hf-neon-poky-linux-gnueabi=
<br />imx6ull@imx6ull-VirtualBox:/media/sf_shared/example/gpio-irq/dev$&nbs=
p;<strong>make</strong><br /><strong>make -C /home/imx6ull/work/Kernel/git.=
5.10.35 SUBDIRS=3D/media/sf_shared/example/gpio-irq/dev modules</strong><br=
 /><strong>make[1]: Entering directory '/home/imx6ull/work/imx-yocto-bsp/im=
x6ull/tmp/work-shared/imx6ull14x14evk/kernel-source'&nbsp; &nbsp;--&gt; i d=
on't know why make goes into this directory which i made SDK</strong><br />=
CALL scripts/checksyscalls.sh<br />CALL scripts/atomic/check-atomics.sh<br =
/>CHK include/generated/compile.h<br />make[1]: Leaving directory '/home/im=
x6ull/work/imx-yocto-bsp/imx6ull/tmp/work-shared/imx6ull14x14evk/kernel-sou=
rce'<br />imx6ull@imx6ull-VirtualBox:/media/sf_shared/example/gpio-irq/dev$=
 ls *.ko<br /><strong>ls: cannot access '*.ko': No such file or directory</=
strong><br />imx6ull@imx6ull-VirtualBox:/media/sf_shared/example/gpio-irq/d=
ev$</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">and my makefile&nbsp;</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">obj-m :=3D of-test.o</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">KDIR :=3D /home/imx6ull/work/Kernel/git.5.10.35<br =
/>PWD :=3D $(shell pwd)<br />NFS_ROOT =3D /home/imx6ull/work/imx-yocto-bsp/=
imx6sx/nfs_full/home/root</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">default:<br />$(MAKE) -C $(KDIR) SUBDIRS=3D$(PWD) m=
odules<br /># cp of-test.ko $(NFS_ROOT)/<br /><br />clean:<br />rm -rf *.ko=
<br />rm -rf *.mod.*<br />rm -rf .*.cmd<br />m -rf *.o</p>
<p style=3D"margin-bottom: 15px; color: #333f48; font-family: Arial, sans-s=
erif; font-size: 16px;">&nbsp;</p>

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