I am trying to insert a kernel module using depmod and modprobe utilities in-order to resolve any dependencies. When I build the module it throws "Warning: modules_install: missing 'System.map' file. Skipping depmod."
And later when I try to execute modprobe it throws an error saying
"modprobe: FATAL: Module i2c_eeprom_client.ko not found in directory /lib/modules/4.19.58-v7+"
Below is the make file I am using:
obj-m += i2c_eeprom_client.o
KDIR = /lib/modules/$(shell uname -r)/build
all:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
make -C $(KDIR) M=$(PWD) modules_install
clean:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
And below is the output of build:
make -C /lib/modules/4.19.58-v7+/build M=/home/pi/work/eeprom modules
make[1]: Entering directory '/usr/src/linux-headers-4.19.58-v7+'
Building modules, stage 2.
MODPOST 1 modules
make[1]: Leaving directory '/usr/src/linux-headers-4.19.58-v7+'
make -C /lib/modules/4.19.58-v7+/build M=/home/pi/work/eeprom
modules_install
make[1]: Entering directory '/usr/src/linux-headers-4.19.58-v7+'
INSTALL /home/pi/work/eeprom/i2c_eeprom_client.ko
DEPMOD 4.19.58-v7+
Warning: modules_install: missing 'System.map' file. Skipping depmod.
make[1]: Leaving directory '/usr/src/linux-headers-4.19.58-v7+'
How can i fix this problem ? Please help
Platform : Raspberry PI 3b+, Raspbian - linux 4.19.58-v7+
You can run depmod after the modules_install step. Also, it is better practice to separate the installation from the building to avoid having to build with root privileges:
obj-m += i2c_eeprom_client.o
# Default to running kernel's build directory if KDIR not set externally
KDIR ?= "/lib/modules/$(shell uname -r)/build"
all:
$(MAKE) -C "$(KDIR)" M="$(CURDIR)" modules
install:
$(MAKE) -C "$(KDIR)" M="$(CURDIR)" modules_install
depmod -A
clean:
$(MAKE) -C "$(KDIR)" M="$(CURDIR)" clean
Invoke as:
$ make
$ make install