1cur_makefile := $(lastword $(MAKEFILE_LIST))
2
3$(cur_makefile): ;
4
5# ==========================================================================
6#
7# make W=... settings
8#
9# W=1 - warnings that may be relevant and does not occur too often
10# W=2 - warnings that occur quite often but may still be relevant
11# W=3 - the more obscure warnings, can most likely be ignored
12#
13# $(call cc-option, -W...) handles gcc -W.. options which
14# are not supported by all versions of the compiler
15# ==========================================================================
16
17ifeq ("$(origin W)","command line")
18  export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
19endif
20
21ifdef KBUILD_ENABLE_EXTRA_GCC_CHECKS
22warning-  := $(empty)
23
24warning-1 := -Wextra -Wunused -Wno-unused-parameter
25warning-1 += -Wmissing-declarations
26warning-1 += -Wmissing-format-attribute
27warning-1 += -Wmissing-include-dirs
28warning-1 += -Wunused-but-set-variable
29warning-1 += -Wno-missing-field-initializers
30c_warning-1 := -Wmissing-prototypes -Wold-style-definition
31
32warning-2 := -Waggregate-return
33warning-2 += -Wcast-align
34warning-2 += -Wdisabled-optimization
35warning-2 += -Wshadow
36warning-2 += -Wlogical-op
37warning-2 += -Wmissing-field-initializers
38c_warning-2 := -Wnested-externs
39
40warning-3 := -Wcast-qual
41warning-3 += -Wconversion
42warning-3 += -Wpacked
43warning-3 += -Wpadded
44warning-3 += -Wpointer-arith
45warning-3 += -Wredundant-decls
46warning-3 += -Wswitch-default
47warning-3 += -Wpacked-bitfield-compat
48warning-3 += -Wvla
49c_warning-3 := -Wbad-function-cast
50
51warning := $(warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
52warning += $(warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
53warning += $(warning-$(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
54
55c_warning := $(warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
56c_warning += $(warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
57c_warning += $(warning-$(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
58
59ifeq ("$(strip $(warning) $(c_warning))","")
60        $(error W=$(KBUILD_ENABLE_EXTRA_GCC_CHECKS) is unknown)
61endif
62
63KBUILD_CFLAGS += $(warning)
64C_ONLY_FLAGS += $(c_warning)
65else
66
67ifeq ($(COMPILER),clang)
68KBUILD_CFLAGS += -Wno-initializer-overrides
69KBUILD_CFLAGS += -Wno-unused-value
70KBUILD_CFLAGS += -Wno-format
71KBUILD_CFLAGS += -Wno-unknown-warning-option
72KBUILD_CFLAGS += -Wno-sign-compare)
73KBUILD_CFLAGS += -Wno-format-zero-length
74KBUILD_CFLAGS += -Wno-uninitialized
75endif
76endif
77