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kbuild: move extra gcc checks to scripts/Makefile.extrawarn
W=... provides extra gcc checks. Having such code in scripts/Makefile.build results in the same flags being added to KBUILD_CFLAGS multiple times becuase scripts/Makefile.build is invoked every time Kbuild descends into the subdirectories. Since the top Makefile is already too cluttered, this commit moves all of extra gcc check stuff to a new file scripts/Makefile.extrawarn, which is included from the top Makefile. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> CC: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| # ========================================================================== | ||
| # | ||
| # 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) | ||
|
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||
| # Clang | ||
| warning-1 += $(call cc-disable-warning, initializer-overrides) | ||
| warning-1 += $(call cc-disable-warning, unused-value) | ||
| warning-1 += $(call cc-disable-warning, format) | ||
| warning-1 += $(call cc-disable-warning, unknown-warning-option) | ||
| warning-1 += $(call cc-disable-warning, sign-compare) | ||
| warning-1 += $(call cc-disable-warning, format-zero-length) | ||
| warning-1 += $(call cc-disable-warning, uninitialized) | ||
| warning-1 += $(call cc-option, -fcatch-undefined-behavior) | ||
|
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||
| 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) | ||
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||
| 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) | ||
|
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||
| warning := $(warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) | ||
| warning += $(warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) | ||
| warning += $(warning-$(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) | ||
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||
| ifeq ("$(strip $(warning))","") | ||
| $(error W=$(KBUILD_ENABLE_EXTRA_GCC_CHECKS) is unknown) | ||
| endif | ||
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| KBUILD_CFLAGS += $(warning) | ||
| endif |