可編譯一個目錄下層所有文件夾，每個文件夾生成一個同文件夾名的內(nèi)核模塊文件

目錄結(jié)構：

.
├── fpgd_gpp
│   ├── fpgd_gpp_console.c
│   ├── fpgd_gpp_console.h
│   ├── fpgd_gpp_console.o
│   ├── fpgd_gpp_hw.c
│   ├── fpgd_gpp_hw.h
│   ├── fpgd_gpp_hw.o
│   ├── fpgd_gpp_image.c
│   ├── fpgd_gpp_image.h
│   ├── fpgd_gpp_image.o
│   ├── fpgd_gpp.ko
│   ├── fpgd_gpp_mmio.c
│   ├── fpgd_gpp_mmio.h
│   ├── fpgd_gpp_mmio.o
│   ├── fpgd_gpp.mod.c
│   ├── fpgd_gpp.mod.o
│   ├── fpgd_gpp_module.c
│   ├── fpgd_gpp_module.h
│   ├── fpgd_gpp_module.o
│   ├── fpgd_gpp.o
│   ├── fpgd_gpp_osal.c
│   ├── fpgd_gpp_osal.o
│   ├── fpgd_gpp_unit.c
│   ├── fpgd_gpp_unit.o
│   ├── fpgd_gpp_update.c
│   ├── fpgd_gpp_update.h
│   ├── fpgd_gpp_update.o
│   ├── Makefile
│   ├── modules.order
│   └── Module.symvers

├── Makefile

上層Makefile

KERNEL_VER = linux-2.6.37
export KERNEL_VER
KDIR = ../../kernel/$(KERNEL_VER)
export KDIR

SUBDIRS := fpgd_gpp

.PHONY:all
all:
    @echo "building for" $(strip $(KERNEL_VER))
    for dir in $(SUBDIRS);\
    do make -C $$dir;\
    done;
    @echo "building for" $(strip $(KERNEL_VER)) finish

.PHONY:install
install:
    @echo "installing for" $(strip $(KERNEL_VER))
    for dir in $(SUBDIRS);\
    do make -C $$dir install;\
    done;
    @echo "installing for" $(strip $(KERNEL_VER)) finish

.PHONY:clean
clean:
    @echo "cleaning for" $(strip $(KERNEL_VER))
    for dir in $(SUBDIRS);\
    do make -C $$dir clean;\
    done;
    @echo "cleaning for" $(strip $(KERNEL_VER)) finish

下層Makefile

ifneq ($(KERNELRELEASE),)
export EXTRA_CFLAGS := -I../../include/
# second run in kernel dir
obj-m := $(MODNAME).o
$(MODNAME)-objs = $(LOCOBJS)
else
# first run in module dir
PWD:= $(shell pwd)
SRCS := $(shell echo *.c)
LOCOBJS := $(SRCS:.c=.o)
MODNAME = $(shell basename `pwd`)
export LOCOBJS
export MODNAME

default:
    $(MAKE) -C $(KDIR) M=$(PWD) modules
clean:
    rm -f *.o *.ko .*.mod.c .*.cmd *.mod.c *.o.p *.order *.symvers
    rm -rf .tmp_versions
install:
    cp -f *.ko ../../drivers_build/bin/
endif