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review.shift-gmbh.com / SHIFTPHONES / mainline / linux / b160628e9ebcdc85d0db9d7f423c26b3c7c179d0 / . / scripts / Makefile.extrawarn
blob: d538255038747db9aba7a3a0fc80d9a68c303af6 [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +0100[diff] [blame]1# SPDX-License-Identifier: GPL-2.0
Masahiro Yamadaa86fe352014-04-14 18:27:10 +0900[diff] [blame]2# ==========================================================================
Masahiro Yamadaa86fe352014-04-14 18:27:10 +0900[diff] [blame]3# make W=... settings
4#
Masahiro Yamada64a91902019-09-01 01:25:54 +0900[diff] [blame]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.
Masahiro Yamadaa86fe352014-04-14 18:27:10 +0900[diff] [blame]7# ==========================================================================
8
Xiongfeng Wang321cb032018-01-11 17:22:29 +0800[diff] [blame]9KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned)
10
Masahiro Yamadae27128d2019-09-01 01:25:55 +0900[diff] [blame]11# backward compatibility
12KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)
13
Masahiro Yamadaa86fe352014-04-14 18:27:10 +0900[diff] [blame]14ifeq ("$(origin W)", "command line")
Masahiro Yamadae27128d2019-09-01 01:25:55 +0900[diff] [blame]15 KBUILD_EXTRA_WARN := $(W)
Masahiro Yamadaa86fe352014-04-14 18:27:10 +0900[diff] [blame]16endif
17
Masahiro Yamadae27128d2019-09-01 01:25:55 +0900[diff] [blame]18export KBUILD_EXTRA_WARN
19
Masahiro Yamada64a91902019-09-01 01:25:54 +0900[diff] [blame]20#
21# W=1 - warnings which may be relevant and do not occur too often
22#
Masahiro Yamadae27128d2019-09-01 01:25:55 +0900[diff] [blame]23ifneq ($(findstring 1, $(KBUILD_EXTRA_WARN)),)
Masahiro Yamadaa86fe352014-04-14 18:27:10 +0900[diff] [blame]24
Masahiro Yamada64a91902019-09-01 01:25:54 +0900[diff] [blame]25KBUILD_CFLAGS += -Wextra -Wunused -Wno-unused-parameter
26KBUILD_CFLAGS += -Wmissing-declarations
27KBUILD_CFLAGS += -Wmissing-format-attribute
28KBUILD_CFLAGS += -Wmissing-prototypes
29KBUILD_CFLAGS += -Wold-style-definition
30KBUILD_CFLAGS += -Wmissing-include-dirs
31KBUILD_CFLAGS += $(call cc-option, -Wunused-but-set-variable)
32KBUILD_CFLAGS += $(call cc-option, -Wunused-const-variable)
33KBUILD_CFLAGS += $(call cc-option, -Wpacked-not-aligned)
34KBUILD_CFLAGS += $(call cc-option, -Wstringop-truncation)
Masahiro Yamada4c8dd952019-05-09 15:46:35 +0900[diff] [blame]35# The following turn off the warnings enabled by -Wextra
Masahiro Yamada64a91902019-09-01 01:25:54 +0900[diff] [blame]36KBUILD_CFLAGS += -Wno-missing-field-initializers
37KBUILD_CFLAGS += -Wno-sign-compare
Rikard Falkeborn355a3582020-07-08 21:07:56 +0200[diff] [blame]38KBUILD_CFLAGS += -Wno-type-limits
Masahiro Yamadaa86fe352014-04-14 18:27:10 +0900[diff] [blame]39
Masahiro Yamada6863f562019-09-07 11:52:36 +0900[diff] [blame]40KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN1
41
Behan Webster26ea6bb2014-07-31 21:08:25 -0700[diff] [blame]42else
43
Masahiro Yamada64a91902019-09-01 01:25:54 +0900[diff] [blame]44# Some diagnostics enabled by default are noisy.
45# Suppress them by using -Wno... except for W=1.
46
Masahiro Yamada076f4212018-10-30 22:26:33 +0900[diff] [blame]47ifdef CONFIG_CC_IS_CLANG
Masahiro Yamadaa1494302019-05-10 23:10:09 +0900[diff] [blame]48KBUILD_CFLAGS += -Wno-initializer-overrides
Masahiro Yamadaa1494302019-05-10 23:10:09 +0900[diff] [blame]49KBUILD_CFLAGS += -Wno-format
50KBUILD_CFLAGS += -Wno-sign-compare
51KBUILD_CFLAGS += -Wno-format-zero-length
Nathan Chancellor82f2bc22020-03-11 12:41:21 -0700[diff] [blame]52KBUILD_CFLAGS += $(call cc-disable-warning, pointer-to-enum-cast)
Nathan Chancellorafe956c2020-03-26 12:41:55 -0700[diff] [blame]53KBUILD_CFLAGS += -Wno-tautological-constant-out-of-range-compare
Behan Webster26ea6bb2014-07-31 21:08:25 -0700[diff] [blame]54endif
Masahiro Yamada64a91902019-09-01 01:25:54 +0900[diff] [blame]55
56endif
57
58#
59# W=2 - warnings which occur quite often but may still be relevant
60#
Masahiro Yamadae27128d2019-09-01 01:25:55 +0900[diff] [blame]61ifneq ($(findstring 2, $(KBUILD_EXTRA_WARN)),)
Masahiro Yamada64a91902019-09-01 01:25:54 +0900[diff] [blame]62
Masahiro Yamada64a91902019-09-01 01:25:54 +0900[diff] [blame]63KBUILD_CFLAGS += -Wdisabled-optimization
Masahiro Yamada64a91902019-09-01 01:25:54 +0900[diff] [blame]64KBUILD_CFLAGS += -Wshadow
65KBUILD_CFLAGS += $(call cc-option, -Wlogical-op)
66KBUILD_CFLAGS += -Wmissing-field-initializers
Rikard Falkeborn355a3582020-07-08 21:07:56 +0200[diff] [blame]67KBUILD_CFLAGS += -Wtype-limits
Masahiro Yamada64a91902019-09-01 01:25:54 +0900[diff] [blame]68KBUILD_CFLAGS += $(call cc-option, -Wmaybe-uninitialized)
69KBUILD_CFLAGS += $(call cc-option, -Wunused-macros)
70
Masahiro Yamada6863f562019-09-07 11:52:36 +0900[diff] [blame]71KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN2
72
Masahiro Yamada64a91902019-09-01 01:25:54 +0900[diff] [blame]73endif
74
75#
76# W=3 - more obscure warnings, can most likely be ignored
77#
Masahiro Yamadae27128d2019-09-01 01:25:55 +0900[diff] [blame]78ifneq ($(findstring 3, $(KBUILD_EXTRA_WARN)),)
Masahiro Yamada64a91902019-09-01 01:25:54 +0900[diff] [blame]79
80KBUILD_CFLAGS += -Wbad-function-cast
Arnd Bergmann095fbca2020-10-26 23:03:13 +0100[diff] [blame]81KBUILD_CFLAGS += -Wcast-align
Masahiro Yamada64a91902019-09-01 01:25:54 +0900[diff] [blame]82KBUILD_CFLAGS += -Wcast-qual
83KBUILD_CFLAGS += -Wconversion
84KBUILD_CFLAGS += -Wpacked
85KBUILD_CFLAGS += -Wpadded
86KBUILD_CFLAGS += -Wpointer-arith
87KBUILD_CFLAGS += -Wredundant-decls
Joe Perchesa97ea932020-07-21 21:57:43 -0700[diff] [blame]88KBUILD_CFLAGS += -Wsign-compare
Masahiro Yamada64a91902019-09-01 01:25:54 +0900[diff] [blame]89KBUILD_CFLAGS += -Wswitch-default
90KBUILD_CFLAGS += $(call cc-option, -Wpacked-bitfield-compat)
91
Masahiro Yamada6863f562019-09-07 11:52:36 +0900[diff] [blame]92KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN3
93
Masahiro Yamadaa86fe352014-04-14 18:27:10 +0900[diff] [blame]94endif