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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
- #
- # $(call cc-option, -W...) handles gcc -W.. options which
- # are not supported by all versions of the compiler
- # ==========================================================================
- ifeq ("$(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 += $(warning)
- else
- ifeq ($(COMPILER),clang)
- KBUILD_CFLAGS += $(call cc-disable-warning, initializer-overrides)
- KBUILD_CFLAGS += $(call cc-disable-warning, unused-value)
- KBUILD_CFLAGS += $(call cc-disable-warning, format)
- KBUILD_CFLAGS += $(call cc-disable-warning, unknown-warning-option)
- KBUILD_CFLAGS += $(call cc-disable-warning, sign-compare)
- KBUILD_CFLAGS += $(call cc-disable-warning, format-zero-length)
- KBUILD_CFLAGS += $(call cc-disable-warning, uninitialized)
- endif
- endif
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