From 6419e144924cf91f8f7c78e914247b02e34b2a89 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Tue, 5 Aug 2014 15:56:43 +0900 Subject: kbuild: move extra gcc checks to scripts/Makefile.extrawarn This commit was imported from Linux Kernel: commit a86fe353 written by me. 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 --- Makefile | 6 ++--- scripts/Makefile.build | 61 ----------------------------------------- scripts/Makefile.extrawarn | 67 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 69 insertions(+), 65 deletions(-) create mode 100644 scripts/Makefile.extrawarn diff --git a/Makefile b/Makefile index b5d5e0110a..38bd7a8f43 100644 --- a/Makefile +++ b/Makefile @@ -109,10 +109,6 @@ ifeq ("$(origin O)", "command line") KBUILD_OUTPUT := $(O) endif -ifeq ("$(origin W)", "command line") - export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W) -endif - # That's our default target when none is given on the command line PHONY := _all _all: @@ -569,6 +565,8 @@ endif export CONFIG_SYS_TEXT_BASE +include $(srctree)/scripts/Makefile.extrawarn + # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments KBUILD_CPPFLAGS += $(KCPPFLAGS) KBUILD_AFLAGS += $(KAFLAGS) diff --git a/scripts/Makefile.build b/scripts/Makefile.build index baeaabe310..6742ddd0b8 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -66,67 +66,6 @@ ifeq ($(KBUILD_NOPEDANTIC),) endif endif -# -# 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 -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) - -# 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) - -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) -endif - include scripts/Makefile.lib ifdef host-progs diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn new file mode 100644 index 0000000000..65643506c7 --- /dev/null +++ b/scripts/Makefile.extrawarn @@ -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) + +# 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) + +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) +endif -- cgit v1.2.1