On 10/01/14 10:57, Jani Nikula wrote:
On Wed, 01 Oct 2014, Jim Davis jim.epost@gmail.com wrote:
Building with the attached random configuration file,
warning: (VIDEO_TIMBERDALE) selects TIMB_DMA which has unmet direct dependencies (DMADEVICES && MFD_TIMBERDALE) warning: (USB_OTG_FSM && FSL_USB2_OTG && USB_MV_OTG) selects USB_OTG which has unmet direct dependencies (USB_SUPPORT && USB && PM_RUNTIME)
drivers/built-in.o: In function `intel_panel_setup_backlight': (.text+0x11855d): undefined reference to `backlight_device_register' drivers/built-in.o: In function `intel_panel_destroy_backlight': (.text+0x118624): undefined reference to `backlight_device_unregister' make: *** [vmlinux] Error 1
It's the combination:
CONFIG_DRM_I915=y CONFIG_BACKLIGHT_CLASS_DEVICE=m
Not sure what the Kconfig magic spell needs to be when we don't want to depend on CONFIG_BACKLIGHT_CLASS_DEVICE but we'll use it if it's enabled (y or m).
Something like:
depends on BACKLIGHT_CLASS_DEVICE || BACKLIGHT_CLASS_DEVICE=n
is what we usually use.