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Commit | Line | Data |
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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
a86fe353 | 2 | # ========================================================================== |
a86fe353 MY |
3 | # make W=... settings |
4 | # | |
64a91907 MY |
5 | # There are three warning groups enabled by W=1, W=2, W=3. |
6 | # They are independent, and can be combined like W=12 or W=123. | |
a86fe353 MY |
7 | # ========================================================================== |
8 | ||
321cb030 XW |
9 | KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned) |
10 | ||
e27128db MY |
11 | # backward compatibility |
12 | KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC_CHECKS) | |
13 | ||
a86fe353 | 14 | ifeq ("$(origin W)", "command line") |
e27128db | 15 | KBUILD_EXTRA_WARN := $(W) |
a86fe353 MY |
16 | endif |
17 | ||
e27128db MY |
18 | export KBUILD_EXTRA_WARN |
19 | ||
64a91907 MY |
20 | # |
21 | # W=1 - warnings which may be relevant and do not occur too often | |
22 | # | |
e27128db | 23 | ifneq ($(findstring 1, $(KBUILD_EXTRA_WARN)),) |
a86fe353 | 24 | |
64a91907 MY |
25 | KBUILD_CFLAGS += -Wextra -Wunused -Wno-unused-parameter |
26 | KBUILD_CFLAGS += -Wmissing-declarations | |
27 | KBUILD_CFLAGS += -Wmissing-format-attribute | |
28 | KBUILD_CFLAGS += -Wmissing-prototypes | |
29 | KBUILD_CFLAGS += -Wold-style-definition | |
30 | KBUILD_CFLAGS += -Wmissing-include-dirs | |
31 | KBUILD_CFLAGS += $(call cc-option, -Wunused-but-set-variable) | |
32 | KBUILD_CFLAGS += $(call cc-option, -Wunused-const-variable) | |
33 | KBUILD_CFLAGS += $(call cc-option, -Wpacked-not-aligned) | |
34 | KBUILD_CFLAGS += $(call cc-option, -Wstringop-truncation) | |
4c8dd95a | 35 | # The following turn off the warnings enabled by -Wextra |
64a91907 MY |
36 | KBUILD_CFLAGS += -Wno-missing-field-initializers |
37 | KBUILD_CFLAGS += -Wno-sign-compare | |
355a3587 | 38 | KBUILD_CFLAGS += -Wno-type-limits |
a86fe353 | 39 | |
6863f564 MY |
40 | KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN1 |
41 | ||
26ea6bb1 BW |
42 | else |
43 | ||
64a91907 MY |
44 | # Some diagnostics enabled by default are noisy. |
45 | # Suppress them by using -Wno... except for W=1. | |
46 | ||
076f421d | 47 | ifdef CONFIG_CC_IS_CLANG |
a1494304 | 48 | KBUILD_CFLAGS += -Wno-initializer-overrides |
a1494304 MY |
49 | KBUILD_CFLAGS += -Wno-format |
50 | KBUILD_CFLAGS += -Wno-sign-compare | |
51 | KBUILD_CFLAGS += -Wno-format-zero-length | |
82f2bc2f | 52 | KBUILD_CFLAGS += $(call cc-disable-warning, pointer-to-enum-cast) |
afe956c5 | 53 | KBUILD_CFLAGS += -Wno-tautological-constant-out-of-range-compare |
26ea6bb1 | 54 | endif |
64a91907 MY |
55 | |
56 | endif | |
57 | ||
58 | # | |
59 | # W=2 - warnings which occur quite often but may still be relevant | |
60 | # | |
e27128db | 61 | ifneq ($(findstring 2, $(KBUILD_EXTRA_WARN)),) |
64a91907 MY |
62 | |
63 | KBUILD_CFLAGS += -Wcast-align | |
64 | KBUILD_CFLAGS += -Wdisabled-optimization | |
65 | KBUILD_CFLAGS += -Wnested-externs | |
66 | KBUILD_CFLAGS += -Wshadow | |
67 | KBUILD_CFLAGS += $(call cc-option, -Wlogical-op) | |
68 | KBUILD_CFLAGS += -Wmissing-field-initializers | |
355a3587 | 69 | KBUILD_CFLAGS += -Wtype-limits |
64a91907 MY |
70 | KBUILD_CFLAGS += $(call cc-option, -Wmaybe-uninitialized) |
71 | KBUILD_CFLAGS += $(call cc-option, -Wunused-macros) | |
72 | ||
6863f564 MY |
73 | KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN2 |
74 | ||
64a91907 MY |
75 | endif |
76 | ||
77 | # | |
78 | # W=3 - more obscure warnings, can most likely be ignored | |
79 | # | |
e27128db | 80 | ifneq ($(findstring 3, $(KBUILD_EXTRA_WARN)),) |
64a91907 MY |
81 | |
82 | KBUILD_CFLAGS += -Wbad-function-cast | |
83 | KBUILD_CFLAGS += -Wcast-qual | |
84 | KBUILD_CFLAGS += -Wconversion | |
85 | KBUILD_CFLAGS += -Wpacked | |
86 | KBUILD_CFLAGS += -Wpadded | |
87 | KBUILD_CFLAGS += -Wpointer-arith | |
88 | KBUILD_CFLAGS += -Wredundant-decls | |
a97ea93e | 89 | KBUILD_CFLAGS += -Wsign-compare |
64a91907 MY |
90 | KBUILD_CFLAGS += -Wswitch-default |
91 | KBUILD_CFLAGS += $(call cc-option, -Wpacked-bitfield-compat) | |
92 | ||
6863f564 MY |
93 | KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN3 |
94 | ||
a86fe353 | 95 | endif |