| | 1 | # |
| | 2 | # (C) Copyright 2000-2006 |
| | 3 | # Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| | 4 | # |
| | 5 | # See file CREDITS for list of people who contributed to this |
| | 6 | # project. |
| | 7 | # |
| | 8 | # This program is free software; you can redistribute it and/or |
| | 9 | # modify it under the terms of the GNU General Public License as |
| | 10 | # published by the Free Software Foundation; either version 2 of |
| | 11 | # the License, or (at your option) any later version. |
| | 12 | # |
| | 13 | # This program is distributed in the hope that it will be useful, |
| | 14 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | 15 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| | 16 | # GNU General Public License for more details. |
| | 17 | # |
| | 18 | # You should have received a copy of the GNU General Public License |
| | 19 | # along with this program; if not, write to the Free Software |
| | 20 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| | 21 | # MA 02111-1307 USA |
| | 22 | # |
| | 23 | |
| | 24 | ######################################################################### |
| | 25 | |
| | 26 | ifeq ($(CURDIR),$(SRCTREE)) |
| | 27 | dir := |
| | 28 | else |
| | 29 | dir := $(subst $(SRCTREE)/,,$(CURDIR)) |
| | 30 | endif |
| | 31 | |
| | 32 | ifneq ($(OBJTREE),$(SRCTREE)) |
| | 33 | # Create object files for SPL in a separate directory |
| | 34 | ifeq ($(CONFIG_SPL_BUILD),y) |
| | 35 | obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/) |
| | 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 | obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/) |
| | 46 | |
| | 47 | $(shell mkdir -p $(obj)) |
| | 48 | else |
| | 49 | obj := |
| | 50 | endif |
| | 51 | src := |
| | 52 | endif |
| | 53 | |
| | 54 | # clean the slate ... |
| | 55 | PLATFORM_RELFLAGS = |
| | 56 | PLATFORM_CPPFLAGS = |
| | 57 | PLATFORM_LDFLAGS = |
| | 58 | |
| | 59 | ######################################################################### |
| | 60 | |
| | 61 | HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \ |
| | 62 | $(HOSTCPPFLAGS) |
| | 63 | HOSTSTRIP = strip |
| | 64 | |
| | 65 | # |
| | 66 | # Mac OS X / Darwin's C preprocessor is Apple specific. It |
| | 67 | # generates numerous errors and warnings. We want to bypass it |
| | 68 | # and use GNU C's cpp. To do this we pass the -traditional-cpp |
| | 69 | # option to the compiler. Note that the -traditional-cpp flag |
| | 70 | # DOES NOT have the same semantics as GNU C's flag, all it does |
| | 71 | # is invoke the GNU preprocessor in stock ANSI/ISO C fashion. |
| | 72 | # |
| | 73 | # Apple's linker is similar, thanks to the new 2 stage linking |
| | 74 | # multiple symbol definitions are treated as errors, hence the |
| | 75 | # -multiply_defined suppress option to turn off this error. |
| | 76 | # |
| | 77 | |
| | 78 | ifeq ($(HOSTOS),darwin) |
| | 79 | # get major and minor product version (e.g. '10' and '6' for Snow Leopard) |
| | 80 | DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.') |
| | 81 | DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.') |
| | 82 | |
| | 83 | os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \ |
| | 84 | $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;) |
| | 85 | |
| | 86 | # Snow Leopards build environment has no longer restrictions as described above |
| | 87 | HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc") |
| | 88 | HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp") |
| | 89 | HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress") |
| | 90 | else |
| | 91 | HOSTCC = gcc |
| | 92 | endif |
| | 93 | |
| | 94 | ifeq ($(HOSTOS),cygwin) |
| | 95 | HOSTCFLAGS += -ansi |
| | 96 | endif |
| | 97 | |
| | 98 | # We build some files with extra pedantic flags to try to minimize things |
| | 99 | # that won't build on some weird host compiler -- though there are lots of |
| | 100 | # exceptions for files that aren't complaint. |
| | 101 | |
| | 102 | HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS)) |
| | 103 | HOSTCFLAGS += -pedantic |
| | 104 | |
| | 105 | ######################################################################### |
| | 106 | # |
| | 107 | # Option checker, gcc version (courtesy linux kernel) to ensure |
| | 108 | # only supported compiler options are used |
| | 109 | # |
| | 110 | CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk |
| | 111 | CC_TEST_OFILE := $(OBJTREE)/include/generated/cc_test_file.o |
| | 112 | |
| | 113 | -include $(CC_OPTIONS_CACHE_FILE) |
| | 114 | |
| | 115 | cc-option-sys = $(shell mkdir -p $(dir $(CC_TEST_OFILE)); \ |
| | 116 | if $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o $(CC_TEST_OFILE) \ |
| | 117 | > /dev/null 2>&1; then \ |
| | 118 | echo 'CC_OPTIONS += $(strip $1)' >> $(CC_OPTIONS_CACHE_FILE); \ |
| | 119 | echo "$(1)"; fi) |
| | 120 | |
| | 121 | ifeq ($(CONFIG_CC_OPT_CACHE_DISABLE),y) |
| | 122 | cc-option = $(strip $(if $(call cc-option-sys,$1),$1,$2)) |
| | 123 | else |
| | 124 | cc-option = $(strip $(if $(findstring $1,$(CC_OPTIONS)),$1,\ |
| | 125 | $(if $(call cc-option-sys,$1),$1,$2))) |
| | 126 | endif |
| | 127 | |
| | 128 | # cc-version |
| | 129 | # Usage gcc-ver := $(call cc-version) |
| | 130 | cc-version = $(shell $(SHELL) $(SRCTREE)/tools/gcc-version.sh $(CC)) |
| | 131 | binutils-version = $(shell $(SHELL) $(SRCTREE)/tools/binutils-version.sh $(AS)) |
| | 132 | |
| | 133 | # |
| | 134 | # Include the make variables (CC, etc...) |
| | 135 | # |
| | 136 | AS = $(CROSS_COMPILE)as |
| | 137 | |
| | 138 | # Always use GNU ld |
| | 139 | LD = $(shell if $(CROSS_COMPILE)ld.bfd -v > /dev/null 2>&1; \ |
| | 140 | then echo "$(CROSS_COMPILE)ld.bfd"; else echo "$(CROSS_COMPILE)ld"; fi;) |
| | 141 | |
| | 142 | CC = $(CROSS_COMPILE)gcc |
| | 143 | CPP = $(CC) -E |
| | 144 | AR = $(CROSS_COMPILE)ar |
| | 145 | NM = $(CROSS_COMPILE)nm |
| | 146 | LDR = $(CROSS_COMPILE)ldr |
| | 147 | STRIP = $(CROSS_COMPILE)strip |
| | 148 | OBJCOPY = $(CROSS_COMPILE)objcopy |
| | 149 | OBJDUMP = $(CROSS_COMPILE)objdump |
| | 150 | RANLIB = $(CROSS_COMPILE)RANLIB |
| | 151 | DTC = dtc |
| | 152 | CHECK = sparse |
| | 153 | |
| | 154 | ######################################################################### |
| | 155 | |
| | 156 | # Load generated board configuration |
| | 157 | sinclude $(OBJTREE)/include/autoconf.mk |
| | 158 | sinclude $(OBJTREE)/include/config.mk |
| | 159 | |
| | 160 | # Some architecture config.mk files need to know what CPUDIR is set to, |
| | 161 | # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files. |
| | 162 | # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains |
| | 163 | # CPU-specific code. |
| | 164 | CPUDIR=arch/$(ARCH)/cpu/$(CPU) |
| | 165 | ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR))) |
| | 166 | CPUDIR=arch/$(ARCH)/cpu |
| | 167 | endif |
| | 168 | |
| | 169 | sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules |
| | 170 | sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules |
| | 171 | |
| | 172 | ifdef SOC |
| | 173 | sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules |
| | 174 | endif |
| | 175 | ifdef VENDOR |
| | 176 | BOARDDIR = $(VENDOR)/$(BOARD) |
| | 177 | else |
| | 178 | BOARDDIR = $(BOARD) |
| | 179 | endif |
| | 180 | ifdef BOARD |
| | 181 | sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules |
| | 182 | endif |
| | 183 | |
| | 184 | ######################################################################### |
| | 185 | |
| | 186 | # We don't actually use $(ARFLAGS) anywhere anymore, so catch people |
| | 187 | # who are porting old code to latest mainline but not updating $(AR). |
| | 188 | ARFLAGS = $(error update your Makefile to use cmd_link_o_target and not AR) |
| | 189 | RELFLAGS= $(PLATFORM_RELFLAGS) |
| | 190 | DBGFLAGS= -g # -DDEBUG |
| | 191 | OPTFLAGS= -Os #-fomit-frame-pointer |
| | 192 | |
| | 193 | OBJCFLAGS += --gap-fill=0xff |
| | 194 | |
| | 195 | gccincdir := $(shell $(CC) -print-file-name=include) |
| | 196 | |
| | 197 | CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \ |
| | 198 | -D__KERNEL__ |
| | 199 | |
| | 200 | # Enable garbage collection of un-used sections for SPL |
| | 201 | ifeq ($(CONFIG_SPL_BUILD),y) |
| | 202 | CPPFLAGS += -ffunction-sections -fdata-sections |
| | 203 | LDFLAGS_FINAL += --gc-sections |
| | 204 | endif |
| | 205 | |
| | 206 | ifneq ($(CONFIG_SYS_TEXT_BASE),) |
| | 207 | CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE) |
| | 208 | endif |
| | 209 | |
| | 210 | ifneq ($(CONFIG_SPL_TEXT_BASE),) |
| | 211 | CPPFLAGS += -DCONFIG_SPL_TEXT_BASE=$(CONFIG_SPL_TEXT_BASE) |
| | 212 | endif |
| | 213 | |
| | 214 | ifneq ($(CONFIG_SPL_PAD_TO),) |
| | 215 | CPPFLAGS += -DCONFIG_SPL_PAD_TO=$(CONFIG_SPL_PAD_TO) |
| | 216 | endif |
| | 217 | |
| | 218 | ifeq ($(CONFIG_SPL_BUILD),y) |
| | 219 | CPPFLAGS += -DCONFIG_SPL_BUILD |
| | 220 | endif |
| | 221 | |
| | 222 | # Does this architecture support generic board init? |
| | 223 | ifeq ($(__HAVE_ARCH_GENERIC_BOARD),) |
| | 224 | ifneq ($(CONFIG_SYS_GENERIC_BOARD),) |
| | 225 | $(error Your architecture does not support generic board. Please undefined \ |
| | 226 | CONFIG_SYS_GENERIC_BOARD in your board config file) |
| | 227 | endif |
| | 228 | endif |
| | 229 | |
| | 230 | ifneq ($(RESET_VECTOR_ADDRESS),) |
| | 231 | CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS) |
| | 232 | endif |
| | 233 | |
| | 234 | ifneq ($(OBJTREE),$(SRCTREE)) |
| | 235 | CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include |
| | 236 | endif |
| | 237 | |
| | 238 | CPPFLAGS += -I$(TOPDIR)/include |
| | 239 | CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \ |
| | 240 | -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS) |
| | 241 | |
| | 242 | ifdef BUILD_TAG |
| | 243 | CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \ |
| | 244 | -DBUILD_TAG='"$(BUILD_TAG)"' |
| | 245 | else |
| | 246 | CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes |
| | 247 | endif |
| | 248 | |
| | 249 | CFLAGS_SSP := $(call cc-option,-fno-stack-protector) |
| | 250 | CFLAGS += $(CFLAGS_SSP) |
| | 251 | # Some toolchains enable security related warning flags by default, |
| | 252 | # but they don't make much sense in the u-boot world, so disable them. |
| | 253 | CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \ |
| | 254 | $(call cc-option,-Wno-format-security) |
| | 255 | CFLAGS += $(CFLAGS_WARN) |
| | 256 | |
| | 257 | # Report stack usage if supported |
| | 258 | CFLAGS_STACK := $(call cc-option,-fstack-usage) |
| | 259 | CFLAGS += $(CFLAGS_STACK) |
| | 260 | |
| | 261 | # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format> |
| | 262 | # option to the assembler. |
| | 263 | AFLAGS_DEBUG := |
| | 264 | |
| | 265 | # turn jbsr into jsr for m68k |
| | 266 | ifeq ($(ARCH),m68k) |
| | 267 | ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4) |
| | 268 | AFLAGS_DEBUG := -Wa,-gstabs,-S |
| | 269 | endif |
| | 270 | endif |
| | 271 | |
| | 272 | AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS) |
| | 273 | |
| | 274 | LDFLAGS += $(PLATFORM_LDFLAGS) |
| | 275 | LDFLAGS_FINAL += -Bstatic |
| | 276 | |
| | 277 | LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL) |
| | 278 | ifneq ($(CONFIG_SYS_TEXT_BASE),) |
| | 279 | LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE) |
| | 280 | endif |
| | 281 | |
| | 282 | LDFLAGS_u-boot-spl += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL) |
| | 283 | ifneq ($(CONFIG_SPL_TEXT_BASE),) |
| | 284 | LDFLAGS_u-boot-spl += -Ttext $(CONFIG_SPL_TEXT_BASE) |
| | 285 | endif |
| | 286 | |
| | 287 | # Linus' kernel sanity checking tool |
| | 288 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
| | 289 | -Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF) |
| | 290 | |
| | 291 | # Location of a usable BFD library, where we define "usable" as |
| | 292 | # "built for ${HOST}, supports ${TARGET}". Sensible values are |
| | 293 | # - When cross-compiling: the root of the cross-environment |
| | 294 | # - Linux/ppc (native): /usr |
| | 295 | # - NetBSD/ppc (native): you lose ... (must extract these from the |
| | 296 | # binutils build directory, plus the native and U-Boot include |
| | 297 | # files don't like each other) |
| | 298 | # |
| | 299 | # So far, this is used only by tools/gdb/Makefile. |
| | 300 | |
| | 301 | ifeq ($(HOSTOS),darwin) |
| | 302 | BFD_ROOT_DIR = /usr/local/tools |
| | 303 | else |
| | 304 | ifeq ($(HOSTARCH),$(ARCH)) |
| | 305 | # native |
| | 306 | BFD_ROOT_DIR = /usr |
| | 307 | else |
| | 308 | #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386 |
| | 309 | #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386 |
| | 310 | BFD_ROOT_DIR = /opt/powerpc |
| | 311 | endif |
| | 312 | endif |
| | 313 | |
| | 314 | ######################################################################### |
| | 315 | |
| | 316 | export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \ |
| | 317 | AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE |
| | 318 | export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS |
| | 319 | |
| | 320 | ######################################################################### |
| | 321 | |
| | 322 | # Allow boards to use custom optimize flags on a per dir/file basis |
| | 323 | BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%)) |
| | 324 | ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR)) |
| | 325 | ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) |
| | 326 | EXTRA_CPPFLAGS = $(CPPFLAGS_$(BCURDIR)/$(@F)) $(CPPFLAGS_$(BCURDIR)) |
| | 327 | ALL_CFLAGS += $(EXTRA_CPPFLAGS) |
| | 328 | |
| | 329 | # The _DEP version uses the $< file target (for dependency generation) |
| | 330 | # See rules.mk |
| | 331 | EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \ |
| | 332 | $(CPPFLAGS_$(BCURDIR)) |
| | 333 | $(obj)%.s: %.S |
| | 334 | $(CPP) $(ALL_AFLAGS) -o $@ $< |
| | 335 | $(obj)%.o: %.S |
| | 336 | $(CC) $(ALL_AFLAGS) -o $@ $< -c |
| | 337 | $(obj)%.o: %.c |
| | 338 | ifneq ($(CHECKSRC),0) |
| | 339 | $(CHECK) $(CHECKFLAGS) $(ALL_CFLAGS) $< |
| | 340 | endif |
| | 341 | $(CC) $(ALL_CFLAGS) -o $@ $< -c |
| | 342 | $(obj)%.i: %.c |
| | 343 | $(CPP) $(ALL_CFLAGS) -o $@ $< -c |
| | 344 | $(obj)%.s: %.c |
| | 345 | $(CC) $(ALL_CFLAGS) -o $@ $< -c -S |
| | 346 | |
| | 347 | ######################################################################### |
| | 348 | |
| | 349 | # If the list of objects to link is empty, just create an empty built-in.o |
| | 350 | cmd_link_o_target = $(if $(strip $1),\ |
| | 351 | $(LD) $(LDFLAGS) -r -o $@ $1,\ |
| | 352 | rm -f $@; $(AR) rcs $@ ) |
| | 353 | |
| | 354 | ######################################################################### |
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