xref: /openbmc/u-boot/scripts/Makefile.extrawarn (revision c68c03f5)
1# ==========================================================================
2#
3# make W=... settings
4#
5# W=1 - warnings that may be relevant and does not occur too often
6# W=2 - warnings that occur quite often but may still be relevant
7# W=3 - the more obscure warnings, can most likely be ignored
8#
9# $(call cc-option, -W...) handles gcc -W.. options which
10# are not supported by all versions of the compiler
11# ==========================================================================
12#
13# SPDX-License-Identifier:	GPL-2.0
14#
15
16ifeq ("$(origin W)", "command line")
17  export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
18endif
19
20ifdef KBUILD_ENABLE_EXTRA_GCC_CHECKS
21warning-  := $(empty)
22
23warning-1 := -Wextra -Wunused -Wno-unused-parameter
24warning-1 += -Wmissing-declarations
25warning-1 += -Wmissing-format-attribute
26warning-1 += $(call cc-option, -Wmissing-prototypes)
27warning-1 += -Wold-style-definition
28warning-1 += $(call cc-option, -Wmissing-include-dirs)
29warning-1 += $(call cc-option, -Wunused-but-set-variable)
30warning-1 += $(call cc-disable-warning, missing-field-initializers)
31
32warning-2 := -Waggregate-return
33warning-2 += -Wcast-align
34warning-2 += -Wdisabled-optimization
35warning-2 += -Wnested-externs
36warning-2 += -Wshadow
37warning-2 += $(call cc-option, -Wlogical-op)
38warning-2 += $(call cc-option, -Wmissing-field-initializers)
39
40warning-3 := -Wbad-function-cast
41warning-3 += -Wcast-qual
42warning-3 += -Wconversion
43warning-3 += -Wpacked
44warning-3 += -Wpadded
45warning-3 += -Wpointer-arith
46warning-3 += -Wredundant-decls
47warning-3 += -Wswitch-default
48warning-3 += $(call cc-option, -Wpacked-bitfield-compat)
49warning-3 += $(call cc-option, -Wvla)
50
51warning := $(warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
52warning += $(warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
53warning += $(warning-$(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
54
55ifeq ("$(strip $(warning))","")
56        $(error W=$(KBUILD_ENABLE_EXTRA_GCC_CHECKS) is unknown)
57endif
58
59KBUILD_CFLAGS += $(warning)
60
61dtc-warning-2 += -Wnode_name_chars_strict
62dtc-warning-2 += -Wproperty_name_chars_strict
63
64dtc-warning := $(dtc-warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
65dtc-warning += $(dtc-warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
66dtc-warning += $(dtc-warning-$(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS)))
67
68DTC_FLAGS += $(dtc-warning)
69
70else
71
72# Disable noisy checks by default
73DTC_FLAGS += -Wno-unit_address_vs_reg
74DTC_FLAGS += -Wno-simple_bus_reg
75DTC_FLAGS += -Wno-unit_address_format
76DTC_FLAGS += -Wno-pci_bridge
77DTC_FLAGS += -Wno-pci_device_bus_num
78DTC_FLAGS += -Wno-pci_device_reg
79
80endif
81