On 08.04.2020 22:27, Arnd Bergmann wrote: > Using 'imply' does not work here, it still cause the same build > failure: > > arm-linux-gnueabi-ld: drivers/gpu/drm/bridge/sil-sii8620.o: in function `sii8620_remove': > sil-sii8620.c:(.text+0x1b8): undefined reference to `extcon_unregister_notifier' > arm-linux-gnueabi-ld: drivers/gpu/drm/bridge/sil-sii8620.o: in function `sii8620_probe': > sil-sii8620.c:(.text+0x27e8): undefined reference to `extcon_find_edev_by_node' > arm-linux-gnueabi-ld: sil-sii8620.c:(.text+0x2870): undefined reference to `extcon_register_notifier' > arm-linux-gnueabi-ld: drivers/gpu/drm/bridge/sil-sii8620.o: in function `sii8620_extcon_work': > sil-sii8620.c:(.text+0x2908): undefined reference to `extcon_get_state' > > I tried the usual 'depends on EXTCON || !EXTCON' logic, but that caused > a circular Kconfig dependency. Using IS_REACHABLE() is ugly but works. 'depends on EXTCON || !EXTCON' seems to be proper solution, maybe would be better to try to solve circular dependencies issue. Regards Andrzej
