1*b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2a86fe353SMasahiro Yamada# ========================================================================== 3a86fe353SMasahiro Yamada# 4a86fe353SMasahiro Yamada# make W=... settings 5a86fe353SMasahiro Yamada# 6a86fe353SMasahiro Yamada# W=1 - warnings that may be relevant and does not occur too often 7a86fe353SMasahiro Yamada# W=2 - warnings that occur quite often but may still be relevant 8a86fe353SMasahiro Yamada# W=3 - the more obscure warnings, can most likely be ignored 9a86fe353SMasahiro Yamada# 10a86fe353SMasahiro Yamada# $(call cc-option, -W...) handles gcc -W.. options which 11a86fe353SMasahiro Yamada# are not supported by all versions of the compiler 12a86fe353SMasahiro Yamada# ========================================================================== 13a86fe353SMasahiro Yamada 14a86fe353SMasahiro Yamadaifeq ("$(origin W)", "command line") 15a86fe353SMasahiro Yamada export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W) 16a86fe353SMasahiro Yamadaendif 17a86fe353SMasahiro Yamada 18a86fe353SMasahiro Yamadaifdef KBUILD_ENABLE_EXTRA_GCC_CHECKS 19a86fe353SMasahiro Yamadawarning- := $(empty) 20a86fe353SMasahiro Yamada 21a86fe353SMasahiro Yamadawarning-1 := -Wextra -Wunused -Wno-unused-parameter 22a86fe353SMasahiro Yamadawarning-1 += -Wmissing-declarations 23a86fe353SMasahiro Yamadawarning-1 += -Wmissing-format-attribute 24a86fe353SMasahiro Yamadawarning-1 += $(call cc-option, -Wmissing-prototypes) 25a86fe353SMasahiro Yamadawarning-1 += -Wold-style-definition 26a86fe353SMasahiro Yamadawarning-1 += $(call cc-option, -Wmissing-include-dirs) 27a86fe353SMasahiro Yamadawarning-1 += $(call cc-option, -Wunused-but-set-variable) 28c9c6837dSArnd Bergmannwarning-1 += $(call cc-option, -Wunused-const-variable) 29a86fe353SMasahiro Yamadawarning-1 += $(call cc-disable-warning, missing-field-initializers) 307599ea8bSLee Joneswarning-1 += $(call cc-disable-warning, sign-compare) 31a86fe353SMasahiro Yamada 32a86fe353SMasahiro Yamadawarning-2 := -Waggregate-return 33a86fe353SMasahiro Yamadawarning-2 += -Wcast-align 34a86fe353SMasahiro Yamadawarning-2 += -Wdisabled-optimization 35a86fe353SMasahiro Yamadawarning-2 += -Wnested-externs 36a86fe353SMasahiro Yamadawarning-2 += -Wshadow 37a86fe353SMasahiro Yamadawarning-2 += $(call cc-option, -Wlogical-op) 38a86fe353SMasahiro Yamadawarning-2 += $(call cc-option, -Wmissing-field-initializers) 397599ea8bSLee Joneswarning-2 += $(call cc-option, -Wsign-compare) 40a76bcf55SArnd Bergmannwarning-2 += $(call cc-option, -Wmaybe-uninitialized) 41de8cf950SJohannes Thumshirnwarning-2 += $(call cc-option, -Wunused-macros) 42a86fe353SMasahiro Yamada 43a86fe353SMasahiro Yamadawarning-3 := -Wbad-function-cast 44a86fe353SMasahiro Yamadawarning-3 += -Wcast-qual 45a86fe353SMasahiro Yamadawarning-3 += -Wconversion 46a86fe353SMasahiro Yamadawarning-3 += -Wpacked 47a86fe353SMasahiro Yamadawarning-3 += -Wpadded 48a86fe353SMasahiro Yamadawarning-3 += -Wpointer-arith 49a86fe353SMasahiro Yamadawarning-3 += -Wredundant-decls 50a86fe353SMasahiro Yamadawarning-3 += -Wswitch-default 51a86fe353SMasahiro Yamadawarning-3 += $(call cc-option, -Wpacked-bitfield-compat) 52a86fe353SMasahiro Yamadawarning-3 += $(call cc-option, -Wvla) 53a86fe353SMasahiro Yamada 54a86fe353SMasahiro Yamadawarning := $(warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) 55a86fe353SMasahiro Yamadawarning += $(warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) 56a86fe353SMasahiro Yamadawarning += $(warning-$(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) 57a86fe353SMasahiro Yamada 58a86fe353SMasahiro Yamadaifeq ("$(strip $(warning))","") 59a86fe353SMasahiro Yamada $(error W=$(KBUILD_ENABLE_EXTRA_GCC_CHECKS) is unknown) 60a86fe353SMasahiro Yamadaendif 61a86fe353SMasahiro Yamada 62a86fe353SMasahiro YamadaKBUILD_CFLAGS += $(warning) 6326ea6bb1SBehan Websterelse 6426ea6bb1SBehan Webster 655631d9c4SMichal Marekifeq ($(cc-name),clang) 6626ea6bb1SBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, initializer-overrides) 6726ea6bb1SBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, unused-value) 6826ea6bb1SBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, format) 6926ea6bb1SBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, sign-compare) 7026ea6bb1SBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, format-zero-length) 7126ea6bb1SBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, uninitialized) 7226ea6bb1SBehan Websterendif 73a86fe353SMasahiro Yamadaendif 74