Linux 驱动模块如何包含多个源文件

参考KBuild的文档

----------------------------------------  

  If a kernel module is built from several source files, you specify

    that you want to build a module in the same way as above.

    Kbuild needs to know which the parts that you want to build your
    module from, so you have to tell it by setting an
    $(-objs) variable.

    Example:
        #drivers/isdn/i4l/Makefile
        obj-$(CONFIG_ISDN) += isdn.o
        isdn-objs := isdn_net_lib.o isdn_v110.o isdn_common.o

    In this example, the module name will be isdn.o. Kbuild will
    compile the objects listed in $(isdn-objs) and then run
    "$(LD) -r" on the list of these files to generate isdn.o.