src/devtools/met-driver/4.9/Makefile

ifneq ($(MET_DRIVER_DIR),)
    MTK_PLATFORM := $(subst ",,$(CONFIG_MTK_PLATFORM))
    MET_COMMON_DIR := $(MET_DRIVER_DIR)/common
    MET_PLF_DIR := $(MET_DRIVER_DIR)/$(MTK_PLATFORM)
    MET_BUILD_DEFAULT := n

    ifneq ($(KERNEL_OUT),)
        include $(KERNEL_OUT)/.config
        ccflags-y += -imacros $(KERNEL_OUT)/include/generated/autoconf.h
    endif

    ifeq ($(CONFIG_MODULES),y)
        ifeq ($(CONFIG_FTRACE),y)
            ifeq ($(CONFIG_TRACING),y)
                FTRACE_READY := y
            endif
        endif

        $(info ******** Start to build met_drv for $(MTK_PLATFORM) ********)
        ifneq ($(MET_PLF_DIR),)
            ifeq ($(FTRACE_READY),y)
                ifeq ($(CONFIG_BUILD_YOCTO),y)
                    include $(MET_COMMON_DIR)/Kbuild.yocto
                else
                    include $(MET_COMMON_DIR)/Kbuild
                endif
            else
                $(warning Not building met.ko due to CONFIG_FTRACE/CONFIG_TRACING is not set, build met default)
                MET_BUILD_DEFAULT = y
            endif
        else
            $(warning not support $(MTK_PLATFORM), build met default)
            MET_BUILD_DEFAULT = y
        endif
    else
        $(warning Not building met.ko due to CONFIG_MODULES is not set, build met default)
        MET_BUILD_DEFAULT := y
    endif

    ifeq ($(MET_BUILD_DEFAULT),y)
        MET_DEF_DIR := $(MET_DRIVER_DIR)/default
        ifeq ($(CONFIG_BUILD_YOCTO),y)
            include $(MET_DEF_DIR)/Kbuild.yocto
        else
            include $(MET_DEF_DIR)/Kbuild
        endif
    endif
else
$(info ******** MET_DRIVER_DIR is empty ********)
endif