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1 | # | |
2 | # (C) Copyright 2000-2013 | |
3 | # Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | # | |
5 | # SPDX-License-Identifier: GPL-2.0+ | |
6 | # | |
7 | ######################################################################### | |
8 | ||
9 | # Set shell to bash if possible, otherwise fall back to sh | |
10 | SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
11 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
12 | else echo sh; fi; fi) | |
13 | ||
14 | export SHELL | |
15 | ||
16 | ifeq ($(CONFIG_TPL_BUILD),y) | |
17 | SPL_BIN := u-boot-tpl | |
18 | else | |
19 | SPL_BIN := u-boot-spl | |
20 | endif | |
21 | ||
22 | ifeq ($(CURDIR),$(SRCTREE)) | |
23 | dir := | |
24 | else | |
25 | dir := $(subst $(SRCTREE)/,,$(CURDIR)) | |
26 | endif | |
27 | ||
28 | ifneq ($(OBJTREE),$(SRCTREE)) | |
29 | # Create object files for SPL in a separate directory | |
30 | ifeq ($(CONFIG_SPL_BUILD),y) | |
31 | ifeq ($(CONFIG_TPL_BUILD),y) | |
32 | obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/) | |
33 | else | |
34 | obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/) | |
35 | endif | |
36 | else | |
37 | obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/) | |
38 | endif | |
39 | src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/) | |
40 | ||
41 | $(shell mkdir -p $(obj)) | |
42 | else | |
43 | # Create object files for SPL in a separate directory | |
44 | ifeq ($(CONFIG_SPL_BUILD),y) | |
45 | ifeq ($(CONFIG_TPL_BUILD),y) | |
46 | obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/) | |
47 | else | |
48 | obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/) | |
49 | ||
50 | endif | |
51 | $(shell mkdir -p $(obj)) | |
52 | else | |
53 | obj := | |
54 | endif | |
55 | src := | |
56 | endif | |
57 | ||
58 | # clean the slate ... | |
59 | PLATFORM_RELFLAGS = | |
60 | PLATFORM_CPPFLAGS = | |
61 | PLATFORM_LDFLAGS = | |
62 | ||
63 | ######################################################################### | |
64 | ||
65 | HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \ | |
66 | $(HOSTCPPFLAGS) | |
67 | HOSTSTRIP = strip | |
68 | ||
69 | # | |
70 | # Mac OS X / Darwin's C preprocessor is Apple specific. It | |
71 | # generates numerous errors and warnings. We want to bypass it | |
72 | # and use GNU C's cpp. To do this we pass the -traditional-cpp | |
73 | # option to the compiler. Note that the -traditional-cpp flag | |
74 | # DOES NOT have the same semantics as GNU C's flag, all it does | |
75 | # is invoke the GNU preprocessor in stock ANSI/ISO C fashion. | |
76 | # | |
77 | # Apple's linker is similar, thanks to the new 2 stage linking | |
78 | # multiple symbol definitions are treated as errors, hence the | |
79 | # -multiply_defined suppress option to turn off this error. | |
80 | # | |
81 | ||
82 | ifeq ($(HOSTOS),darwin) | |
83 | # get major and minor product version (e.g. '10' and '6' for Snow Leopard) | |
84 | DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.') | |
85 | DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.') | |
86 | ||
87 | os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \ | |
88 | $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;) | |
89 | ||
90 | # Snow Leopards build environment has no longer restrictions as described above | |
91 | HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc") | |
92 | HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp") | |
93 | HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress") | |
94 | else | |
95 | HOSTCC = gcc | |
96 | endif | |
97 | ||
98 | ifeq ($(HOSTOS),cygwin) | |
99 | HOSTCFLAGS += -ansi | |
100 | endif | |
101 | ||
102 | # We build some files with extra pedantic flags to try to minimize things | |
103 | # that won't build on some weird host compiler -- though there are lots of | |
104 | # exceptions for files that aren't complaint. | |
105 | ||
106 | HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS)) | |
107 | HOSTCFLAGS += -pedantic | |
108 | ||
109 | ######################################################################### | |
110 | # | |
111 | # Option checker, gcc version (courtesy linux kernel) to ensure | |
112 | # only supported compiler options are used | |
113 | # | |
114 | CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk | |
115 | CC_TEST_OFILE := $(OBJTREE)/include/generated/cc_test_file.o | |
116 | ||
117 | -include $(CC_OPTIONS_CACHE_FILE) | |
118 | ||
119 | cc-option-sys = $(shell mkdir -p $(dir $(CC_TEST_OFILE)); \ | |
120 | if $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o $(CC_TEST_OFILE) \ | |
121 | > /dev/null 2>&1; then \ | |
122 | echo 'CC_OPTIONS += $(strip $1)' >> $(CC_OPTIONS_CACHE_FILE); \ | |
123 | echo "$(1)"; fi) | |
124 | ||
125 | ifeq ($(CONFIG_CC_OPT_CACHE_DISABLE),y) | |
126 | cc-option = $(strip $(if $(call cc-option-sys,$1),$1,$2)) | |
127 | else | |
128 | cc-option = $(strip $(if $(findstring $1,$(CC_OPTIONS)),$1,\ | |
129 | $(if $(call cc-option-sys,$1),$1,$2))) | |
130 | endif | |
131 | ||
132 | # cc-version | |
133 | # Usage gcc-ver := $(call cc-version) | |
134 | cc-version = $(shell $(SHELL) $(SRCTREE)/tools/gcc-version.sh $(CC)) | |
135 | binutils-version = $(shell $(SHELL) $(SRCTREE)/tools/binutils-version.sh $(AS)) | |
136 | dtc-version = $(shell $(SHELL) $(SRCTREE)/tools/dtc-version.sh $(DTC)) | |
137 | ||
138 | # | |
139 | # Include the make variables (CC, etc...) | |
140 | # | |
141 | AS = $(CROSS_COMPILE)as | |
142 | ||
143 | # Always use GNU ld | |
144 | LD = $(shell if $(CROSS_COMPILE)ld.bfd -v > /dev/null 2>&1; \ | |
145 | then echo "$(CROSS_COMPILE)ld.bfd"; else echo "$(CROSS_COMPILE)ld"; fi;) | |
146 | ||
147 | CC = $(CROSS_COMPILE)gcc | |
148 | CPP = $(CC) -E | |
149 | AR = $(CROSS_COMPILE)ar | |
150 | NM = $(CROSS_COMPILE)nm | |
151 | LDR = $(CROSS_COMPILE)ldr | |
152 | STRIP = $(CROSS_COMPILE)strip | |
153 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
154 | OBJDUMP = $(CROSS_COMPILE)objdump | |
155 | RANLIB = $(CROSS_COMPILE)RANLIB | |
156 | DTC = dtc | |
157 | CHECK = sparse | |
158 | ||
159 | ######################################################################### | |
160 | ||
161 | # Load generated board configuration | |
162 | ifeq ($(CONFIG_TPL_BUILD),y) | |
163 | # Include TPL autoconf | |
164 | sinclude $(OBJTREE)/include/tpl-autoconf.mk | |
165 | else | |
166 | ifeq ($(CONFIG_SPL_BUILD),y) | |
167 | # Include SPL autoconf | |
168 | sinclude $(OBJTREE)/include/spl-autoconf.mk | |
169 | else | |
170 | # Include normal autoconf | |
171 | sinclude $(OBJTREE)/include/autoconf.mk | |
172 | endif | |
173 | endif | |
174 | sinclude $(OBJTREE)/include/config.mk | |
175 | ||
176 | # Some architecture config.mk files need to know what CPUDIR is set to, | |
177 | # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files. | |
178 | # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains | |
179 | # CPU-specific code. | |
180 | CPUDIR=arch/$(ARCH)/cpu/$(CPU) | |
181 | ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR))) | |
182 | CPUDIR=arch/$(ARCH)/cpu | |
183 | endif | |
184 | ||
185 | sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules | |
186 | sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules | |
187 | ||
188 | ifdef SOC | |
189 | sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules | |
190 | endif | |
191 | ifdef VENDOR | |
192 | BOARDDIR = $(VENDOR)/$(BOARD) | |
193 | else | |
194 | BOARDDIR = $(BOARD) | |
195 | endif | |
196 | ifdef BOARD | |
197 | sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules | |
198 | endif | |
199 | ||
200 | ######################################################################### | |
201 | ||
202 | # We don't actually use $(ARFLAGS) anywhere anymore, so catch people | |
203 | # who are porting old code to latest mainline but not updating $(AR). | |
204 | ARFLAGS = $(error update your Makefile to use cmd_link_o_target and not AR) | |
205 | RELFLAGS= $(PLATFORM_RELFLAGS) | |
206 | DBGFLAGS= -g # -DDEBUG | |
207 | OPTFLAGS= -Os #-fomit-frame-pointer | |
208 | ||
209 | OBJCFLAGS += --gap-fill=0xff | |
210 | ||
211 | gccincdir := $(shell $(CC) -print-file-name=include) | |
212 | ||
213 | CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \ | |
214 | -D__KERNEL__ | |
215 | ||
216 | # Enable garbage collection of un-used sections for SPL | |
217 | ifeq ($(CONFIG_SPL_BUILD),y) | |
218 | CPPFLAGS += -ffunction-sections -fdata-sections | |
219 | LDFLAGS_FINAL += --gc-sections | |
220 | endif | |
221 | ||
222 | # TODO(sjg@chromium.org): Is this correct on Mac OS? | |
223 | ||
224 | # MXSImage needs LibSSL | |
225 | ifneq ($(CONFIG_MX23)$(CONFIG_MX28),) | |
226 | HOSTLIBS += -lssl -lcrypto | |
227 | # Add CONFIG_MXS into host CFLAGS, so we can check whether or not register | |
228 | # the mxsimage support within tools/mxsimage.c . | |
229 | HOSTCFLAGS += -DCONFIG_MXS | |
230 | endif | |
231 | ||
232 | ifdef CONFIG_FIT_SIGNATURE | |
233 | HOSTLIBS += -lssl -lcrypto | |
234 | ||
235 | # This affects include/image.h, but including the board config file | |
236 | # is tricky, so manually define this options here. | |
237 | HOSTCFLAGS += -DCONFIG_FIT_SIGNATURE | |
238 | endif | |
239 | ||
240 | ifneq ($(CONFIG_SYS_TEXT_BASE),) | |
241 | CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE) | |
242 | endif | |
243 | ||
244 | ifeq ($(CONFIG_SPL_BUILD),y) | |
245 | CPPFLAGS += -DCONFIG_SPL_BUILD | |
246 | ifeq ($(CONFIG_TPL_BUILD),y) | |
247 | CPPFLAGS += -DCONFIG_TPL_BUILD | |
248 | endif | |
249 | endif | |
250 | ||
251 | # Does this architecture support generic board init? | |
252 | ifeq ($(__HAVE_ARCH_GENERIC_BOARD),) | |
253 | ifneq ($(CONFIG_SYS_GENERIC_BOARD),) | |
254 | CHECK_GENERIC_BOARD = $(error Your architecture does not support generic board. \ | |
255 | Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file) | |
256 | endif | |
257 | endif | |
258 | ||
259 | ifneq ($(OBJTREE),$(SRCTREE)) | |
260 | CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include | |
261 | endif | |
262 | ||
263 | CPPFLAGS += -I$(TOPDIR)/include | |
264 | CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \ | |
265 | -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS) | |
266 | ||
267 | CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes | |
268 | ||
269 | ifdef BUILD_TAG | |
270 | CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"' | |
271 | endif | |
272 | ||
273 | CFLAGS_SSP := $(call cc-option,-fno-stack-protector) | |
274 | CFLAGS += $(CFLAGS_SSP) | |
275 | # Some toolchains enable security related warning flags by default, | |
276 | # but they don't make much sense in the u-boot world, so disable them. | |
277 | CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \ | |
278 | $(call cc-option,-Wno-format-security) | |
279 | CFLAGS += $(CFLAGS_WARN) | |
280 | ||
281 | # Report stack usage if supported | |
282 | CFLAGS_STACK := $(call cc-option,-fstack-usage) | |
283 | CFLAGS += $(CFLAGS_STACK) | |
284 | ||
285 | BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%)) | |
286 | ||
287 | ifeq ($(findstring examples/,$(BCURDIR)),) | |
288 | ifeq ($(CONFIG_SPL_BUILD),) | |
289 | ifdef FTRACE | |
290 | CFLAGS += -finstrument-functions -DFTRACE | |
291 | endif | |
292 | endif | |
293 | endif | |
294 | ||
295 | # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format> | |
296 | # option to the assembler. | |
297 | AFLAGS_DEBUG := | |
298 | ||
299 | # turn jbsr into jsr for m68k | |
300 | ifeq ($(ARCH),m68k) | |
301 | ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4) | |
302 | AFLAGS_DEBUG := -Wa,-gstabs,-S | |
303 | endif | |
304 | endif | |
305 | ||
306 | AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS) | |
307 | ||
308 | LDFLAGS += $(PLATFORM_LDFLAGS) | |
309 | LDFLAGS_FINAL += -Bstatic | |
310 | ||
311 | LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL) | |
312 | ifneq ($(CONFIG_SYS_TEXT_BASE),) | |
313 | LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE) | |
314 | endif | |
315 | ||
316 | LDFLAGS_$(SPL_BIN) += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL) | |
317 | ifneq ($(CONFIG_SPL_TEXT_BASE),) | |
318 | LDFLAGS_$(SPL_BIN) += -Ttext $(CONFIG_SPL_TEXT_BASE) | |
319 | endif | |
320 | ||
321 | # Linus' kernel sanity checking tool | |
322 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ | |
323 | -Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF) | |
324 | ||
325 | # Location of a usable BFD library, where we define "usable" as | |
326 | # "built for ${HOST}, supports ${TARGET}". Sensible values are | |
327 | # - When cross-compiling: the root of the cross-environment | |
328 | # - Linux/ppc (native): /usr | |
329 | # - NetBSD/ppc (native): you lose ... (must extract these from the | |
330 | # binutils build directory, plus the native and U-Boot include | |
331 | # files don't like each other) | |
332 | # | |
333 | # So far, this is used only by tools/gdb/Makefile. | |
334 | ||
335 | ifeq ($(HOSTOS),darwin) | |
336 | BFD_ROOT_DIR = /usr/local/tools | |
337 | else | |
338 | ifeq ($(HOSTARCH),$(ARCH)) | |
339 | # native | |
340 | BFD_ROOT_DIR = /usr | |
341 | else | |
342 | #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386 | |
343 | #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386 | |
344 | BFD_ROOT_DIR = /opt/powerpc | |
345 | endif | |
346 | endif | |
347 | ||
348 | ######################################################################### | |
349 | ||
350 | export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \ | |
351 | AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE | |
352 | export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS | |
353 | ||
354 | ######################################################################### | |
355 | ||
356 | # Allow boards to use custom optimize flags on a per dir/file basis | |
357 | ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR)) | |
358 | ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) | |
359 | EXTRA_CPPFLAGS = $(CPPFLAGS_$(BCURDIR)/$(@F)) $(CPPFLAGS_$(BCURDIR)) | |
360 | ALL_CFLAGS += $(EXTRA_CPPFLAGS) | |
361 | ||
362 | # The _DEP version uses the $< file target (for dependency generation) | |
363 | # See rules.mk | |
364 | EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \ | |
365 | $(CPPFLAGS_$(BCURDIR)) | |
366 | $(obj)%.s: %.S | |
367 | $(CPP) $(ALL_AFLAGS) -o $@ $< | |
368 | $(obj)%.o: %.S | |
369 | $(CC) $(ALL_AFLAGS) -o $@ $< -c | |
370 | $(obj)%.o: %.c | |
371 | ifneq ($(CHECKSRC),0) | |
372 | $(CHECK) $(CHECKFLAGS) $(ALL_CFLAGS) $< | |
373 | endif | |
374 | $(CC) $(ALL_CFLAGS) -o $@ $< -c | |
375 | $(obj)%.i: %.c | |
376 | $(CPP) $(ALL_CFLAGS) -o $@ $< -c | |
377 | $(obj)%.s: %.c | |
378 | $(CC) $(ALL_CFLAGS) -o $@ $< -c -S | |
379 | ||
380 | ######################################################################### | |
381 | ||
382 | # If the list of objects to link is empty, just create an empty built-in.o | |
383 | cmd_link_o_target = $(if $(strip $1),\ | |
384 | $(LD) $(LDFLAGS) -r -o $@ $1,\ | |
385 | rm -f $@; $(AR) rcs $@ ) | |
386 | ||
387 | ######################################################################### |