Build Error

Applications Programming
1

I am facing a problem while building the device driver code.

I am using suse linux "2.6.31.5-0.1-desktop" on my Laptop.
I have copied a folder containing self written device driver files from Mandriva linux to my system having Suse Linux.
I copied the entire folder in "/home/netuser/sun/". This folder was building properly in Mandriva.

Now when I give a make command it fails as:
linux-8qbp:/home/netuser/Rupesh_KP/Emertxe/CourseTemplates/CharDriver # make
make: *** No targets. Stop.

Will you pls through some light as to what might be the issue and how to resolve it?

2

Something seems to be wrong with the makefile for it to find no targets at all. Could you post it?

3

Thanks Corona for the reply.
Actually I have in a folder "\CourseTemplates\CharDriver" in which I have made a simple kernel module file having a null char driver.
To build this folder "CourseTemplates" has three files, while subfolder "\CourseTemplates\CharDriver" has an empty makefile.

The three files of Folder "CourseTemplates" are:
1) Makefile

	DIRS := $(filter-out Makefile README module.mk, $(wildcard *))
		DIRS_CLEAN := $(DIRS:=_clean)

		.PHONY: all ${DIRS} clean

		all: ${DIRS}

		${DIRS}:
			@echo -n "Building $@ ... "
			@${MAKE} -C $@ KERNEL_SOURCE=/home/netuser/RKP/linux-source/linux-2.6.27.14/linux-2.6.27.14-1mnb/ > /dev/null
			@echo "done"

		clean: ${DIRS_CLEAN}

		%_clean:
			@echo -n "Cleaning $* ... "
			@${MAKE} -C $* KERNEL_SOURCE=/home/netuser/RKP/linux-source/linux-2.6.27.14/linux-2.6.27.14-1mnb/ clean > /dev/null
			@echo "done"

2) Makefile.mixed

		UNAME := $(shell uname -r)
		KERNEL26 := 2.6
		KERNELVERSION := $(findstring $(KERNEL26),$(UNAME))

		ifeq ($(KERNELVERSION),2.6)

		obj-m   := hello10.o

		INCLUDE := -I/usr/include/asm/mach-default/
		KDIR    := /lib/modules/$(shell uname -r)/build
		PWD     := $(shell pwd)

		all::
			$(MAKE) -C $(KDIR) $(INCLUDE) SUBDIRS=$(PWD) modules

		else

		TARGET  := skeleton
		INCLUDE := -I/lib/modules/`uname -r`/build/include -I/usr/include/asm/mach-default/
		CFLAGS  := -O2 -Wall -DMODULE -D__KERNEL__ -DLINUX
		CC      := gcc

		all:: ${TARGET}.o

		${TARGET}.o: ${TARGET}.c
			$(CC) $(CFLAGS) ${INCLUDE} -c ${TARGET}.c

		endif

3) module.mk

		# if KERNELRELEASE is defined, we've been invoked from the
		# kernel build system and can use its language.
		ifneq ($(KERNELRELEASE),)
			src-m := $(wildcard ${SUBDIRS}/*.c)
			src-mod := $(wildcard ${SUBDIRS}/*.mod.c)
			src-m := $(notdir ${src-m})
			src-mod := $(notdir ${src-mod})
			src-m := $(filter-out ${src-mod}, ${src-m})
			obj-m := $(src-m:.c=.o)
		# Otherwise we were called directly from the command
		# line; invoke the kernel build system.
		else
			KERNEL_SOURCE := /home/netuser/RKP/linux-source/linux-2.6.27.14/linux-2.6.27.14-1mnb/
			PWD := $(shell pwd)
		default:
			$(MAKE) -C $(KERNEL_SOURCE) SUBDIRS=$(PWD) modules

		clean:
			$(MAKE) -C $(KERNEL_SOURCE) SUBDIRS=$(PWD) clean
		endif

---------- Post updated at 01:03 AM ---------- Previous update was at 01:00 AM ----------

I have suse linux "linux-2.6.31.5-0.1" on my PC.

Now I have created a new makefile in CharDriver folder with below content:

# if KERNELRELEASE is defined, we've been invoked from the
# kernel build system and can use its language.
ifneq ($(KERNELRELEASE),)
src-m := $(wildcard ${SUBDIRS}/*.c)
src-mod := $(wildcard ${SUBDIRS}/*.mod.c)
src-m := $(notdir ${src-m})
src-mod := $(notdir ${src-mod})
src-m := $(filter-out ${src-mod}, ${src-m})
obj-m := $(src-m:.c=.o)
# Otherwise we were called directly from the command
# line; invoke the kernel build system.
else
KERNEL_SOURCE := /home/netuser/RKP/linux-source/linux-2.6.27.14/linux-2.6.27.14-1mnb/
PWD := $(shell pwd)
default:
$(MAKE) -C $(KERNEL_SOURCE) SUBDIRS=$(PWD) modules

clean:
$(MAKE) -C $(KERNEL_SOURCE) SUBDIRS=$(PWD) clean
endif

Now it gives me the following build error:

linux-8qbp:/home/netuser/RKP/CourseTemplates/CharDriver # make
make -C /home/netuser/RKP/linux-source/linux-2.6.27.14/linux-2.6.27.14-1mnb/ SUBDIRS=/home/netuser/RKP/CourseTemplates/CharDriver modules
make[1]: Entering directory `/home/netuser/RKP/linux-source/linux-2.6.27.14/linux-2.6.27.14-1mnb'

WARNING: Symbol version dump /home/netuser/RKP/linux-source/linux-2.6.27.14/linux-2.6.27.14-1mnb/Module.symvers
is missing; modules will have no dependencies and modversions.

CC [M] /home/netuser/RKP/CourseTemplates/CharDriver/char_driver.o
/home/netuser/RKP/CourseTemplates/CharDriver/char_driver.c:1: error: code model �kernel� not supported in the 32 bit mode
/home/netuser/RKP/CourseTemplates/CharDriver/char_driver.c:1: sorry, unimplemented: 64-bit mode not compiled in
make[2]: *** [/home/netuser/RKP/CourseTemplates/CharDriver/char_driver.o] Error 1
make[1]: *** [_module_/home/netuser/RKP/CourseTemplates/CharDriver] Error 2
make[1]: Leaving directory `/home/netuser/RKP/linux-source/linux-2.6.27.14/linux-2.6.27.14-1mnb'
make: *** [default] Error

Will you pls through some light as to what might be the issue and how to resolve it.

4

Could you please ensure that the kernel versions are compatible?

From the error messages it seems to be a compilation targeted for 64-bit system whereas you new host is 32-bit installation.

Also do a touch recursively to all the files to update the timestamp of all the files in your sandbox to ensure that make utility finds everything on your new host for compilation; the error-2 unimplemented: 64-bit mode not compiled in ... and the initial ones make: *** No targets. Stop.
.. of the error which went off automatically for you and you could atleast run the compilation (posted in your last one ...) gives me an impression of the mismatch time/date set in both of your machine there by Make not finding objects to compile.

Run (from the top directory of your sandbox):

find . -type f -exec touch {} \;

Further ensure that target is set for 32 bit compilation and kernel version mismatch is properly appended in your code.

If possible post your code here in the forum as a tar/zip attachment.

1 Like
5

Thanks Praveen for the reply.
I just changed the kernel source to an another and built it.
But now I am facing another problem.
I tried with a simple kernel module:

#include <linux/module.h>
#include <linux/version.h>
#include <linux/kernel.h>

/* Add your variables here */

static int __init mfd_init(void)
{
	printk(KERN_INFO "mfd registered");
	return 0;
}

static void __exit mfd_exit(void)
{
	printk(KERN_INFO "mfd deregistered");
}

module_init(mfd_init);
module_exit(mfd_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("RKP");
MODULE_DESCRIPTION("Test Driver");

I used the earlier makefile just changing the kernel source:

# if KERNELRELEASE is defined, we've been invoked from the
# kernel build system and can use its language.
ifneq ($(KERNELRELEASE),)
	src-m := $(wildcard ${SUBDIRS}/*.c)
	src-mod := $(wildcard ${SUBDIRS}/*.mod.c)
	src-m := $(notdir ${src-m})
	src-mod := $(notdir ${src-mod})
	src-m := $(filter-out ${src-mod}, ${src-m})
	obj-m := $(src-m:.c=.o)
# Otherwise we were called directly from the command
# line; invoke the kernel build system.
else
	KERNEL_SOURCE := /usr/src/linux-2.6.31.5-0.1/
	PWD := $(shell pwd)
default:
	$(MAKE) -C $(KERNEL_SOURCE) SUBDIRS=$(PWD) modules

clean:
	$(MAKE) -C $(KERNEL_SOURCE) SUBDIRS=$(PWD) clean
endif

The code got built.
But on loading the module it gives me an error:

insmod test_driver.ko 
insmod: error inserting 'test_driver.ko': -1 Invalid module format

Any idea how to get rid of this?