drivers/built-in.o: In function `acpi_pci_choose_state': pci-acpi.c:(.text+0xdccf): undefined reference to `acpi_pm_device_sleep_state' drivers/built-in.o: In function `pnpacpi_suspend': core.c:(.text+0x35a7c): undefined reference to `acpi_pm_device_sleep_state' Config file attached.