1 # SPDX-License-Identifier: GPL-2.0 2 # ========================================================================== 3 # 4 # make W=... settings 5 # 6 # W=1 - warnings that may be relevant and does not occur too often 7 # W=2 - warnings that occur quite often but may still be relevant 8 # W=3 - the more obscure warnings, can most likely be ignored 9 # 10 # $(call cc-option, -W...) handles gcc -W.. options which 11 # are not supported by all versions of the compiler 12 # ========================================================================== 13 14 ifeq ("$(origin W)", "command line") 15 export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W) 16 endif 17 18 ifdef KBUILD_ENABLE_EXTRA_GCC_CHECKS 19 warning- := $(empty) 20 21 warning-1 := -Wextra -Wunused -Wno-unused-parameter 22 warning-1 += -Wmissing-declarations 23 warning-1 += -Wmissing-format-attribute 24 warning-1 += $(call cc-option, -Wmissing-prototypes) 25 warning-1 += -Wold-style-definition 26 warning-1 += $(call cc-option, -Wmissing-include-dirs) 27 warning-1 += $(call cc-option, -Wunused-but-set-variable) 28 warning-1 += $(call cc-disable-warning, missing-field-initializers) 29 30 warning-2 := -Waggregate-return 31 warning-2 += -Wcast-align 32 warning-2 += -Wdisabled-optimization 33 warning-2 += -Wnested-externs 34 warning-2 += -Wshadow 35 warning-2 += $(call cc-option, -Wlogical-op) 36 warning-2 += $(call cc-option, -Wmissing-field-initializers) 37 38 warning-3 := -Wbad-function-cast 39 warning-3 += -Wcast-qual 40 warning-3 += -Wconversion 41 warning-3 += -Wpacked 42 warning-3 += -Wpadded 43 warning-3 += -Wpointer-arith 44 warning-3 += -Wredundant-decls 45 warning-3 += -Wswitch-default 46 warning-3 += $(call cc-option, -Wpacked-bitfield-compat) 47 warning-3 += $(call cc-option, -Wvla) 48 49 warning := $(warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) 50 warning += $(warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) 51 warning += $(warning-$(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) 52 53 ifeq ("$(strip $(warning))","") 54 $(error W=$(KBUILD_ENABLE_EXTRA_GCC_CHECKS) is unknown) 55 endif 56 57 KBUILD_CFLAGS += $(warning) 58 59 dtc-warning-2 += -Wnode_name_chars_strict 60 dtc-warning-2 += -Wproperty_name_chars_strict 61 62 dtc-warning := $(dtc-warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) 63 dtc-warning += $(dtc-warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) 64 dtc-warning += $(dtc-warning-$(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) 65 66 DTC_FLAGS += $(dtc-warning) 67 68 else 69 70 # Disable noisy checks by default 71 DTC_FLAGS += -Wno-unit_address_vs_reg 72 DTC_FLAGS += -Wno-simple_bus_reg 73 DTC_FLAGS += -Wno-unit_address_format 74 DTC_FLAGS += -Wno-pci_bridge 75 DTC_FLAGS += -Wno-pci_device_bus_num 76 DTC_FLAGS += -Wno-pci_device_reg 77 78 endif 79
