The first time I wrote the driver, the compilation went wrong.

The first time I wrote the driver, there was a problem with compilation-Linux general technology-Linux programming and kernel information. The following is a detailed description. I wrote a module similar to "hello world": mydrive. c.

Makefile content:

Obj-m: = mydrive. o
KDIR: =/lib/modules/$ (shell uname-r)/build
PWD: = $ (shell pwd)
Default:
$ (MAKE)-C $ (KDIR) M = $ (PWD) modules
Clean:
Rm-f *. ko *. o *. mod. c

The following is what I showed up in make. I don't know why the mydrive. o file was not generated. It may be that the makefile is wrong. My kernel is 2.4.20-8.
Who can help?

[Root @ eeko firstdrv] # ls
Makefile mydrive. c
[Root @ eeko firstdrv] # make

Make-C/lib/modules/2.4.20-8/build M =/home/eeko/mydoc/firstdrv modules
Make [1]: Entering directory '/usr/src/linux-2.4.20-8'
Make-r-f tmp_include_depends all
Make [2]: Entering directory '/usr/src/linux-2.4.20-8'
Make [2]: Circular/usr/src/linux-2.4.20-8/include/asm/smplock. h <-/usr/src/linux-2.4.20-8/include/linux/interrupt. h dependency dropped.
Make [2]: Circular/usr/src/linux-2.4.20-8/include/linux/netfilter_ipv4/ip_conntrack.h <-/usr/src/linux-2.4.20-8/include/linux/netfilter_ipv4/ip_conntrack_helper.h dependency dropped.
Make [2]: Nothing to be done for 'all '.
Make [2]: Leaving directory '/usr/src/linux-2.4.20-8'
Make-C kernel CFLAGS = "-d1_kernel _-I/usr/src/linux-2.4.20-8/include-Wall-Wstrict-prototypes-Wno-trigraphs-O2-fno-strict-aliasing- fno-common-fomit-frame-pointer-pipe-mpreferred-stack-boundary = 2-march = i686-DMODULE-DMODVERSIONS-include/usr/src/linux-2.4.20-8/include/linux/ modversions. h "MAKING_MODULES = 1 modules
Make [2]: Entering directory '/usr/src/linux-2.4.20-8/kernel'
Make [2]: Nothing to be done for 'modules '.
Make [2]: Leaving directory '/usr/src/linux-2.4.20-8/kernel'
Make-C drivers CFLAGS = "-d1_kernel _-I/usr/src/linux-2.4.20-8/include-Wall-Wstrict-prototypes-Wno-trigraphs-O2-fno-strict-aliasing- fno-common-fomit-frame-pointer-pipe-mpreferred-stack-boundary = 2-march = i686-DMODULE-DMODVERSIONS-include/usr/src/linux-2.4.20-8/include/linux/ modversions. h "MAKING_MODULES = 1 modules
Make [2]: Entering directory '/usr/src/linux-2.4.20-8/drivers'
Make-C addon modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/drivers/addon'
Make [3]: Nothing to be done for 'modules '.
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/addon'
Make-C block modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/drivers/Block'
Make [3]: Nothing to be done for 'modules '.
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/Block'
Make-C cdrom modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/drivers/cdrom'
Make [3]: Nothing to be done for 'modules '.
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/cdrom'
Make-C char modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/drivers/char'
Make-C drm modules
Make [4]: Entering directory '/usr/src/linux-2.4.20-8/drivers/char/drm'
Make [4]: Nothing to be done for 'modules '.
Make [4]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/char/drm'
Make-C pcmcia modules
Make [4]: Entering directory '/usr/src/linux-2.4.20-8/drivers/char/pcmcia'
Make [4]: Nothing to be done for 'modules '.
Make [4]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/char/pcmcia'
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/char'
Make-C hotplug modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/drivers/hotplug'
Make [3]: Nothing to be done for 'modules '.
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/hotplug'
Make-C ide modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/drivers/ide'
Make-C arm modules
Make [4]: Entering directory '/usr/src/linux-2.4.20-8/drivers/ide/arm'
Make [4]: Nothing to be done for 'modules '.
Make [4]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/ide/arm'
Make-C legacy modules
Make [4]: Entering directory '/usr/src/linux-2.4.20-8/drivers/ide/legacy'
Make [4]: Nothing to be done for 'modules '.
Make [4]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/ide/legacy'
Make-C pci modules
Make [4]: Entering directory '/usr/src/linux-2.4.20-8/drivers/ide/pci'
Make [4]: Nothing to be done for 'modules '.
Make [4]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/ide/pci'
Make-C ppc modules
Make [4]: Entering directory '/usr/src/linux-2.4.20-8/drivers/ide/ppc'
Make [4]: Nothing to be done for 'modules '.
Make [4]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/ide/ppc'
Make-C raid modules
Make [4]: Entering directory '/usr/src/linux-2.4.20-8/drivers/ide/raid'
Make [4]: Nothing to be done for 'modules '.
Make [4]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/ide/raid'
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/ide'
Make-C media modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/drivers/media'
Make-C radio modules
Make [4]: Entering directory '/usr/src/linux-2.4.20-8/drivers/media/radio'
Make [4]: Nothing to be done for 'modules '.
Make [4]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/media/radio'
Make-C video modules
Make [4]: Entering directory '/usr/src/linux-2.4.20-8/drivers/media/video'
Make [4]: Nothing to be done for 'modules '.
Make [4]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/media/video'
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/media'
Make-C misc modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/drivers/misc'
Make [3]: Nothing to be done for 'modules '.
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/misc'
Make-C net modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/drivers/net'
Make-C pcmcia modules
Make [4]: Entering directory '/usr/src/linux-2.4.20-8/drivers/net/pcmcia'
Make [4]: Nothing to be done for 'modules '.
Make [4]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/net/pcmcia'
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/net'
Make-C parport modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/drivers/parport'
Make [3]: Nothing to be done for 'modules '.
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/parport'
Make-C pnp modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/drivers/pnp'
Make [3]: Nothing to be done for 'modules '.
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/pnp'
Make-C scsi modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/drivers/scsi'
Make-C aic7xxx modules
Make [4]: Entering directory '/usr/src/linux-2.4.20-8/drivers/scsi/aic7xxx'
Make [4]: Nothing to be done for 'modules '.
Make [4]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/scsi/aic7xxx'
Make-C pcmcia modules
Make [4]: Entering directory '/usr/src/linux-2.4.20-8/drivers/scsi/pcmcia'
Make [4]: Nothing to be done for 'modules '.
Make [4]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/scsi/pcmcia'
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/scsi'
Make-C sound modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/drivers/sound'
Make [3]: Nothing to be done for 'modules '.
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/sound'
Make-C usb modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/drivers/usb'
Make [3]: Nothing to be done for 'modules '.
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/usb'
Make-C video modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/drivers/video'
Make [3]: Nothing to be done for 'modules '.
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/drivers/video'
Make [2]: Leaving directory '/usr/src/linux-2.4.20-8/drivers'
Make-C mm CFLAGS = "-d1_kernel _-I/usr/src/linux-2.4.20-8/include-Wall-Wstrict-prototypes-Wno-trigraphs-O2-fno-strict-aliasing- fno-common-fomit-frame-pointer-pipe-mpreferred-stack-boundary = 2-march = i686-DMODULE-DMODVERSIONS-include/usr/src/linux-2.4.20-8/include/linux/ modversions. h "MAKING_MODULES = 1 modules
Make [2]: Entering directory '/usr/src/linux-2.4.20-8/mm'
Make [2]: Nothing to be done for 'modules '.
Make [2]: Leaving directory '/usr/src/linux-2.4.20-8/mm'
Make-C fs CFLAGS = "-d1_kernel _-I/usr/src/linux-2.4.20-8/include-Wall-Wstrict-prototypes-Wno-trigraphs-O2-fno-strict-aliasing- fno-common-fomit-frame-pointer-pipe-mpreferred-stack-boundary = 2-march = i686-DMODULE-DMODVERSIONS-include/usr/src/linux-2.4.20-8/include/linux/ modversions. h "MAKING_MODULES = 1 modules
Make [2]: Entering directory '/usr/src/linux-2.4.20-8/fs'
Make [2]: Nothing to be done for 'modules '.
Make [2]: Leaving directory '/usr/src/linux-2.4.20-8/fs'
Make-C net CFLAGS = "-d1_kernel _-I/usr/src/linux-2.4.20-8/include-Wall-Wstrict-prototypes-Wno-trigraphs-O2-fno-strict-aliasing- fno-common-fomit-frame-pointer-pipe-mpreferred-stack-boundary = 2-march = i686-DMODULE-DMODVERSIONS-include/usr/src/linux-2.4.20-8/include/linux/ modversions. h "MAKING_MODULES = 1 modules
Make [2]: Entering directory '/usr/src/linux-2.4.20-8/net'
Make-C core modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/net/core'
Make [3]: Nothing to be done for 'modules '.
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/net/core'
Make-C ipv4 modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/net/ipv4'
Make [3]: Nothing to be done for 'modules '.
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/net/ipv4'
Make-C netlink modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/net/netlink'
Make [3]: Nothing to be done for 'modules '.
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/net/netlink'
Make-C sched modules
Make [3]: Entering directory '/usr/src/linux-2.4.20-8/net/sched'
Make [3]: Nothing to be done for 'modules '.
Make [3]: Leaving directory '/usr/src/linux-2.4.20-8/net/sched'
Make [2]: Leaving directory '/usr/src/linux-2.4.20-8/net'
Make-C ipc CFLAGS = "-d1_kernel _-I/usr/src/linux-2.4.20-8/include-Wall-Wstrict-prototypes-Wno-trigraphs-O2-fno-strict-aliasing- fno-common-fomit-frame-pointer-pipe-mpreferred-stack-boundary = 2-march = i686-DMODULE-DMODVERSIONS-include/usr/src/linux-2.4.20-8/include/linux/ modversions. h "MAKING_MODULES = 1 modules
Make [2]: Entering directory '/usr/src/linux-2.4.20-8/ipc'
Make [2]: Nothing to be done for 'modules '.
Make [2]: Leaving directory '/usr/src/linux-2.4.20-8/ipc'
Make-C lib CFLAGS = "-d1_kernel _-I/usr/src/linux-2.4.20-8/include-Wall-Wstrict-prototypes-Wno-trigraphs-O2-fno-strict-aliasing- fno-common-fomit-frame-pointer-pipe-mpreferred-stack-boundary = 2-march = i686-DMODULE-DMODVERSIONS-include/usr/src/linux-2.4.20-8/include/linux/ modversions. h "MAKING_MODULES = 1 modules
Make [2]: Entering directory '/usr/src/linux-2.4.20-8/lib'
Make [2]: Nothing to be done for 'modules '.
Make [2]: Leaving directory '/usr/src/linux-2.4.20-8/lib'
Make-C crypto CFLAGS = "-d1_kernel _-I/usr/src/linux-2.4.20-8/include-Wall-Wstrict-prototypes-Wno-trigraphs-O2-fno-strict-aliasing- fno-common-fomit-frame-pointer-pipe-mpreferred-stack-boundary = 2-march = i686-DMODULE-DMODVERSIONS-include/usr/src/linux-2.4.20-8/include/linux/ modversions. h "MAKING_MODULES = 1 modules
Make [2]: Entering directory '/usr/src/linux-2.4.20-8/crypto'
Make [2]: Nothing to be done for 'modules '.
Make [2]: Leaving directory '/usr/src/linux-2.4.20-8/crypto'
Make-C arch/i386/kernel CFLAGS = "-d1_kernel _-I/usr/src/linux-2.4.20-8/include-Wall-Wstrict-prototypes-Wno-trigraphs-O2-fno- strict-aliasing-fno-common-fomit-frame-pointer-pipe-mpreferred-stack-boundary = 2-march = i686-DMODULE-DMODVERSIONS-include/usr/src/linux-2.4.20-8/ include/linux/modversions. h "MAKING_MODULES = 1 modules
Make [2]: Entering directory '/usr/src/linux-2.4.20-8/arch/i386/kernel'
Make [2]: Nothing to be done for 'modules '.
Make [2]: Leaving directory '/usr/src/linux-2.4.20-8/arch/i386/kernel'
Make-C arch/i386/mm CFLAGS = "-dsf-kernel _-I/usr/src/linux-2.4.20-8/include-Wall-Wstrict-prototypes-Wno-trigraphs-O2-fno- strict-aliasing-fno-common-fomit-frame-pointer-pipe-mpreferred-stack-boundary = 2-march = i686-DMODULE-DMODVERSIONS-include/usr/src/linux-2.4.20-8/ include/linux/modversions. h "MAKING_MODULES = 1 modules
Make [2]: Entering directory '/usr/src/linux-2.4.20-8/arch/i386/mm'
Make [2]: Nothing to be done for 'modules '.
Make [2]: Leaving directory '/usr/src/linux-2.4.20-8/arch/i386/mm'
Make-C arch/i386/lib CFLAGS = "-dsf-kernel _-I/usr/src/linux-2.4.20-8/include-Wall-Wstrict-prototypes-Wno-trigraphs-O2-fno- strict-aliasing-fno-common-fomit-frame-pointer-pipe-mpreferred-stack-boundary = 2-march = i686-DMODULE-DMODVERSIONS-include/usr/src/linux-2.4.20-8/ include/linux/modversions. h "MAKING_MODULES = 1 modules
Make [2]: Entering directory '/usr/src/linux-2.4.20-8/arch/i386/lib'
Make [2]: Nothing to be done for 'modules '.
Make [2]: Leaving directory '/usr/src/linux-2.4.20-8/arch/i386/lib'
Make [1]: Leaving directory '/usr/src/linux-2.4.20-8'