Driver can not be inserted with error "inserting gedv0.ko: -1 Invalid mosule format"
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make -C $(KERNELDIR) SUBDIRS=$(PWD) ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- modules
After run make following erros occured:
Building modules, stage 2.
MODPOST 0 modules
/bin/sh: scripts/mod/modpost: No such file or directory
make:***[modules] Error 2
make:***Leaving directory 'usr/iNetPLC5x/Source/kernel/linux-188.8.131.52'
make: ***[call-kernel-build-system] Error 2
For some reason the modpost tool has not been built yet. Do the following: Go to the kernel source directory and enter "make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- SUBDIRS=scripts/mod". This command should build the modpost tool. Normally this tool is created, when you build the kernel. Check if the executable scripts/mod/modpost exists and try again.
You have to make the change from ko -> o. The .ko file will be created then. modpost will create a file gedrv0.mod.c this file will contain all needed version information. This file is compiled and linked with gedrv0.o to give the .ko-file.
When using obj-m := ...ko you will get the warning
target `...' doesn't match the target pattern
The file Module.symvers is normally created when compiling the kernel for the target system. Perhaps you can find it in the original compilation directory. It will tell modpost to on which modules your module depends. If it is not present, the module should be created anyway and should be usable.
make -C ../../kernel/linux-184.108.40.206 SUBDIRS=/usr/iNetPLC5x/Source/drivers/ge_io ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- modules
make: Entering directory '/usr/iNetPLC5x/source/kernel/linux-220.127.116.11'
WARNING: Symbol version dump /usr/iNetPLC5x/Source/kernel/linux-18.104.22.168/Module.symvers is missing; modules will have no dependencies and modversions.