| # SPDX-License-Identifier: GPL-2.0 |
| # ========================================================================== |
| # |
| # 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 |
| # ========================================================================== |
| |
| KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned) |
| |
| ifeq ("$(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 += -Wmissing-prototypes |
| warning-1 += -Wold-style-definition |
| warning-1 += -Wmissing-include-dirs |
| warning-1 += $(call cc-option, -Wunused-but-set-variable) |
| warning-1 += $(call cc-option, -Wunused-const-variable) |
| warning-1 += $(call cc-option, -Wpacked-not-aligned) |
| warning-1 += $(call cc-option, -Wstringop-truncation) |
| # The following turn off the warnings enabled by -Wextra |
| warning-1 += -Wno-missing-field-initializers |
| warning-1 += -Wno-sign-compare |
| |
| warning-2 += -Wcast-align |
| warning-2 += -Wdisabled-optimization |
| warning-2 += -Wnested-externs |
| warning-2 += -Wshadow |
| warning-2 += $(call cc-option, -Wlogical-op) |
| warning-2 += -Wmissing-field-initializers |
| warning-2 += -Wsign-compare |
| warning-2 += $(call cc-option, -Wmaybe-uninitialized) |
| warning-2 += $(call cc-option, -Wunused-macros) |
| |
| 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 := $(warning-$(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 |
| |
| ifdef CONFIG_CC_IS_CLANG |
| KBUILD_CFLAGS += -Wno-initializer-overrides |
| KBUILD_CFLAGS += -Wno-format |
| KBUILD_CFLAGS += -Wno-sign-compare |
| KBUILD_CFLAGS += -Wno-format-zero-length |
| endif |
| endif |
