blob: c6dac4cbfe2070c07737d403b3c265d0315a9240 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
-include Kbuild
# Disable builti-n rules and variables
MAKEFLAGS += -r -R
# Disable output of entering/leaving directory messages
MAKEFLAGS += --no-print-directory
export MSG = @printf '\033[34m%-8s\033[0m %s\n'
this-makefile = $(lastword $(MAKEFILE_LIST))
srctree = $(realpath $(dir $(this-makefile)))
.DEFAULT_GOAL := all
LLVM ?= 1
ifneq ($(LLVM),1)
ifneq ($(filter %/,$(LLVM)),)
LLVM_PREFIX = $(LLVM)
else ifneq ($(filter -%,$(LLVM)),)
LLVM_SUFFIX = $(LLVM)
endif
endif
# Variables
ifeq ($(LLVM),1)
CC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
LD = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX)
AR = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX)
STRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX)
else
CC = $(CROSS_COMPILE)gcc
LD = $(CROSS_COMPILE)ld
AR = $(CROSS_COMPILE)ar
STRIP = $(CROSS_COMPILE)strip
endif
ifndef ARCH
ARCH := x86_64
endif
ifeq ($(CCACHE),1)
CC := ccache $(CC)
endif
ifndef O
O := $(srctree)/dist
else
O := $(srctree)/$(O)
endif
export CC LD AR STRIP CROSS_COMPILE ARCH O
ifeq ($(V),1)
Q :=
else
Q := @
MAKEFLAGS += -s
endif
ifdef M
obj = $(M)/
endif
KCONFIG_CONFIG ?= .config
-include ${KCONFIG_CONFIG}
# CFLAGS
KBUILD_CFLAGS := -x c
KBUILD_CFLAGS += -Wall -Wextra
KBUILD_CFLAGS += -nostdinc
KBUILD_CFLAGS += -target $(ARCH)-linux-eabi
KBUILD_CFLAGS += -ffreestanding
KBUILD_CFLAGS += -I$(srctree)/include
KBUILD_CFLAGS += -I$(srctree)/include/arch/$(ARCH)
KBUILD_CFLAGS += -std=c11
KBUILD_CFLAGS += -fno-common
KBUILD_CFLAGS += -fno-PIE
KBUILD_CFLAGS += -fstrict-aliasing
KBUILD_CFLAGS += -fno-delete-null-pointer-checks
# Disable overflow optimizations
KBUILD_CFLAGS += -fno-strict-overflow
# Disable stack check
KBUILD_CFLAGS += -fno-stack-check
# Weird loops transformations to wcslen
KBUILD_CFLAGS += -fno-builtin-wcslen
ifeq ($(CONFIG_WERROR),y)
KBUILD_CFLAGS += -Werror
endif
KBUILD_LDFLAGS :=
KBUILD_ASFLAGS :=
ifeq ($(CONFIG_DEBUG),y)
KBUILD_CFLAGS += -g -O0 -fno-omit-frame-pointer -fno-stack-protector
else
KBUILD_CFLAGS += -O2 -fdata-sections -ffunction-sections
KBUILD_CFLAGS += -fno-unwind-tables -fomit-frame-pointer
KBUILD_CFLAGS += -flto
KBUILD_LDFLAGS += --gc-sections
KBUILD_LDFLAGS += --build-id=none
KBUILD_LDFLAGS += --as-needed
# KBUILD_LDFLAGS += --strip-all
KBUILD_LDFLAGS += -z relro -z now -z noexecstack
KBUILD_LDFLAGS += --no-undefined
KBUILD_LDFLAGS += --icf=all
KBUILD_ASFLAGS +=
endif
# Assembly does not need -nostdinc; clang warns it is unused.
KBUILD_ASFLAGS += -target $(ARCH)-linux-eabi
KBUILD_ASFLAGS += -I$(srctree)/include
KUILD_ASFLAGS += -I$(srctree)/include/arch/$(ARCH)
PHONY :=
export Q srctree MAKEFLAGS KCONFIG_CONFIG \
KBUILD_CFLAGS KBUILD_ASFLAGS KBUILD_LDFLAGS
PHONY += install
all: compile_commands.json
$(Q)$(MAKE) -f scripts/makefile.build obj=$(obj)
PHONY += install
install: all
$(Q)$(MAKE) -f scripts/makefile.build obj=$(obj) install
mkdir -p $(O)/usr
cp -r $(srctree)/include $(O)/usr/
rm -rf $(O)/usr/include/arch $(O)/usr/include/generated ${O}/usr/include/config
PHONY += clean
clean:
$(Q)$(MAKE) -f scripts/makefile.build obj=$(obj) clean
$(Q)rm -f $(srctree)/include/config/auto.conf
$(Q)rm -f $(srctree)/include/generated/autoconf.h
$(Q)rm -rf $(srctree)/dist
PHONY += distclean
distclean: clean
$(Q)$(MAKE) -C scripts/kconfig clean
$(Q)rm -f compile_commands.json
$(KCONFIG_CONFIG):
@echo >&2 '***'
@echo >&2 '*** Configuration file "$@" not found!'
@echo >&2 '***'
@echo >&2 '*** Please run some configurator'
@echo >&2 '*** (e.g. "make oldconfig" or "make menuconfig"'
@echo >&2 '***'
@false
PHONY += help
help:
@echo "Available make targets:"
@echo " all - Build the project (default)"
@echo " install - Install the built files"
@echo " clean - Clean build files"
@echo " distclean - Clean all generated files"
@echo " menuconfig - Launch the menu-based configuration tool"
@echo " include-what-you-use - Run include-what-you-use on the source files"
@echo " clang-tidy - Run clang-tidy on the source files"
@echo " clang-format - Format source files using clang-format"
compile_commands.json:
$(Q)bear -- $(MAKE) -f scripts/makefile.build obj=$(obj) all
PHONY += menuconfig
menuconfig:
$(Q)$(MAKE) -C $(srctree)/scripts/kconfig menuconfig
PHONY += include-what-you-use
include-what-you-use: compile_commands.json
$(Q)iwyu_tool.py -p. -j4 -- -Xiwyu --update_comments -Xiwyu --transitive_includes_only -Xiwyu --no_internal_mappings | \
fix_includes.py --comments \
--quoted_includes_first \
--nosafe_headers \
--update_comments \
--reorder
PHONY += clang-tidy
clang-tidy: compile_commands.json
$(Q)clang-tidy -header-filter=.* -p=. -fix -fix-errors $(shell find . -name '*.c' -o -name '*.h' | grep -v './scripts/\|dtoa\|linux\|arch\|bits\|libm') \
--export-fixes=clang-tidy-fixes.yaml
PHONY += clang-format
clang-format:
$(Q)clang-format -i $(shell find . -name '*.c' -o -name '*.h' | grep -v './scripts/')
%/include/config/auto.conf %/include/generated/autoconf.h: $(KCONFIG_CONFIG) compile_commands.json
$(Q)$(MAKE) -f scripts/kconfig/makefile syncconfig
.PHONY: $(PHONY)
|
