在linux驅動開發(一)--示例中我們將hello模組編譯為hello.ko是直接採用makefile來編譯，那麼如何修改為linux核心統一的風格呢，接下來將做相關介紹
關鍵點：
1.在menuconfig中新增子專案(kconfig)
2.在makefile中新增子專案的編譯(makefile)
kconfig背景知識：kconfig總結
在drivers目錄下建立hello目錄，上節示例中的hello.c，hello.h拷貝到hello目錄
root@leon: /home/workplace/sc2410_android/kernel/drivers/hello# ls
hello.c hello.h
root@leon: /home/workplace/rk3229_android/kernel# make menuconfig#
# hello device configuration
##menu "hello test" //開啟則hello由子項改為子選單即內部可再支援新增子項
config hello //配置預編譯巨集
tristate "hello test" //"hello test「對應menuconfig ->devices drivers內新增hello模組子項名，tristate為3態，檢視kconfig總結
default y //3態預設選擇項，y為*,n為空
---help--- //hello子項對應help資訊
hello support test
#endmenu
root@leon: /home/workplace/sc2410_android/kernel/drivers# vim kconfig
menu "device drivers"
source "drivers/base/kconfig"
......
source "drivers/headset_observe/kconfig"
source "drivers/android/kconfig"
source "drivers/hello/kconfig" //在上級drivers kconfig內新增引入hello/kconfig
endmenu
root@leon: /home/workplace/sc2410_android/kernel/drivers/hello# ls
hello.c hello.h kconfig
二.新增編譯項
root@leon: /home/workplace/sc2410_android/kernel/drivers/hello# cat makefile
## drivers/hello/makefile
## makefile for the linux hello device drivers.
#obj-$(config_hello) += hello.o //config_hello預編譯巨集，與kconfig內對應，只是需要加config_字首
vi /home/workplace/sc2410_android/kernel/drivers/makefile
......
obj-$(config_hello) +=hello/
編譯hello.ko
root@leon: /home/workplace/sc2410_android/kernel# make
scripts/kconfig/conf --silentoldconfig kconfig
chk include/generated/uapi/linux/version.h
chk include/generated/utsrelease.h
chk include/generated/sub_version.h
make[1]: 「include/generated/mach-types.h」是最新的。
call scripts/checksyscalls.sh
cc scripts/mod/devicetable-offsets.s
gen scripts/mod/devicetable-offsets.h
hostcc scripts/mod/file2alias.o
hostld scripts/mod/modpost
chk include/generated/compile.h
chk drivers/gator/gator_src_md5.h
cc [m] drivers/gator/gator_main.o
ld [m] drivers/gator/gator.o
ld drivers/hello/built-in.o
cc [m] drivers/hello/hello.o
gen drivers/video/rockchip/screen/lcd.h
ld drivers/built-in.o
link vmlinux
ld vmlinux.o
modpost vmlinux.o
objcopy pie/pie_stage1.o
ld pie/pie_stage2.o
objcopy pie/pie_stage3.o
ld pie/pie.elf
objcopy pie/pie.bin
objcopy pie/pie.bin.o
ld pie/built-in.o
gen .version
chk include/generated/compile.h
upd include/generated/compile.h
cc init/version.o
ld init/built-in.o
ksym .tmp_kallsyms1.o
ksym .tmp_kallsyms2.o
ld vmlinux
sortex vmlinux
sysmap system.map
objcopy arch/arm/boot/image
kernel: arch/arm/boot/image is ready
lzo arch/arm/boot/compressed/piggy.lzo
as arch/arm/boot/compressed/piggy.lzo.o
ld arch/arm/boot/compressed/vmlinux
objcopy arch/arm/boot/zimage
kernel: arch/arm/boot/zimage is ready
building modules, stage 2.
modpost 5 modules
cc drivers/gator/gator.mod.o
ld [m] drivers/gator/gator.ko
cc drivers/hello/hello.mod.o
ld [m] drivers/hello/hello.ko 成功編譯出hello.ko
擴充套件：1.tristate 3態：在menyconfig中選擇「*「則靜態編譯進核心，選擇「m」則編譯為單獨的.ko，選擇「 」則不編譯，由鍵盤空格鍵切換
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