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scripts/Makefile.extrawarn
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# ========================================================================== # # make W=... settings # # W=1 - warnings that may be relevant and does not occur too often # W=2 - warnings that occur quite often but may still be relevant # W=3 - the more obscure warnings, can most likely be ignored # # $(call cc-option, -W...) handles gcc -W.. options which # are not supported by all versions of the compiler # ========================================================================== # # SPDX-License-Identifier: GPL-2.0 # ifeq ("$(origin W)", "command line") export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W) endif ifdef KBUILD_ENABLE_EXTRA_GCC_CHECKS warning- := $(empty) warning-1 := -Wextra -Wunused -Wno-unused-parameter warning-1 += -Wmissing-declarations warning-1 += -Wmissing-format-attribute warning-1 += $(call cc-option, -Wmissing-prototypes) warning-1 += -Wold-style-definition warning-1 += $(call cc-option, -Wmissing-include-dirs) warning-1 += $(call cc-option, -Wunused-but-set-variable) warning-1 += $(call cc-disable-warning, missing-field-initializers) warning-2 := -Waggregate-return warning-2 += -Wcast-align warning-2 += -Wdisabled-optimization warning-2 += -Wnested-externs warning-2 += -Wshadow warning-2 += $(call cc-option, -Wlogical-op) warning-2 += $(call cc-option, -Wmissing-field-initializers) warning-3 := -Wbad-function-cast warning-3 += -Wcast-qual warning-3 += -Wconversion warning-3 += -Wpacked warning-3 += -Wpadded warning-3 += -Wpointer-arith warning-3 += -Wredundant-decls warning-3 += -Wswitch-default warning-3 += $(call cc-option, -Wpacked-bitfield-compat) warning-3 += $(call cc-option, -Wvla) warning := $(warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) warning += $(warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) warning += $(warning-$(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) ifeq ("$(strip $(warning))","") $(error W=$(KBUILD_ENABLE_EXTRA_GCC_CHECKS) is unknown) endif KBUILD_CFLAGS += $(warning) dtc-warning-2 += -Wnode_name_chars_strict dtc-warning-2 += -Wproperty_name_chars_strict dtc-warning := $(dtc-warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) dtc-warning += $(dtc-warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) dtc-warning += $(dtc-warning-$(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) DTC_FLAGS += $(dtc-warning) else # Disable noisy checks by default DTC_FLAGS += -Wno-unit_address_vs_reg DTC_FLAGS += -Wno-simple_bus_reg DTC_FLAGS += -Wno-unit_address_format DTC_FLAGS += -Wno-pci_bridge DTC_FLAGS += -Wno-pci_device_bus_num DTC_FLAGS += -Wno-pci_device_reg endif |