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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 | ifneq ($(OBJTREE),$(SRCTREE)) | |
27 | ifeq ($(CURDIR),$(SRCTREE)) | |
28 | dir := | |
29 | else | |
30 | dir := $(subst $(SRCTREE)/,,$(CURDIR)) | |
31 | endif | |
32 | ||
33 | obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/) | |
34 | src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/) | |
35 | ||
36 | $(shell mkdir -p $(obj)) | |
37 | else | |
38 | obj := | |
39 | src := | |
40 | endif | |
41 | ||
42 | # clean the slate ... | |
43 | PLATFORM_RELFLAGS = | |
44 | PLATFORM_CPPFLAGS = | |
45 | PLATFORM_LDFLAGS = | |
46 | ||
47 | ######################################################################### | |
48 | ||
49 | HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \ | |
50 | $(HOSTCPPFLAGS) | |
51 | HOSTSTRIP = strip | |
52 | ||
53 | # | |
54 | # Mac OS X / Darwin's C preprocessor is Apple specific. It | |
55 | # generates numerous errors and warnings. We want to bypass it | |
56 | # and use GNU C's cpp. To do this we pass the -traditional-cpp | |
57 | # option to the compiler. Note that the -traditional-cpp flag | |
58 | # DOES NOT have the same semantics as GNU C's flag, all it does | |
59 | # is invoke the GNU preprocessor in stock ANSI/ISO C fashion. | |
60 | # | |
61 | # Apple's linker is similar, thanks to the new 2 stage linking | |
62 | # multiple symbol definitions are treated as errors, hence the | |
63 | # -multiply_defined suppress option to turn off this error. | |
64 | # | |
65 | ||
66 | ifeq ($(HOSTOS),darwin) | |
67 | # get major and minor product version (e.g. '10' and '6' for Snow Leopard) | |
68 | DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.') | |
69 | DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.') | |
70 | ||
71 | os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \ | |
72 | $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;) | |
73 | ||
74 | # Snow Leopards build environment has no longer restrictions as described above | |
75 | HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc") | |
76 | HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp") | |
77 | HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress") | |
78 | else | |
79 | HOSTCC = gcc | |
80 | endif | |
81 | ||
82 | ifeq ($(HOSTOS),cygwin) | |
83 | HOSTCFLAGS += -ansi | |
84 | endif | |
85 | ||
86 | # We build some files with extra pedantic flags to try to minimize things | |
87 | # that won't build on some weird host compiler -- though there are lots of | |
88 | # exceptions for files that aren't complaint. | |
89 | ||
90 | HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS)) | |
91 | HOSTCFLAGS += -pedantic | |
92 | ||
93 | ######################################################################### | |
94 | # | |
95 | # Option checker (courtesy linux kernel) to ensure | |
96 | # only supported compiler options are used | |
97 | # | |
98 | cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ | |
99 | > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) | |
100 | ||
101 | # | |
102 | # Include the make variables (CC, etc...) | |
103 | # | |
104 | AS = $(CROSS_COMPILE)as | |
105 | LD = $(CROSS_COMPILE)ld | |
106 | CC = $(CROSS_COMPILE)gcc | |
107 | CPP = $(CC) -E | |
108 | AR = $(CROSS_COMPILE)ar | |
109 | NM = $(CROSS_COMPILE)nm | |
110 | LDR = $(CROSS_COMPILE)ldr | |
111 | STRIP = $(CROSS_COMPILE)strip | |
112 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
113 | OBJDUMP = $(CROSS_COMPILE)objdump | |
114 | RANLIB = $(CROSS_COMPILE)RANLIB | |
115 | ||
116 | ######################################################################### | |
117 | ||
118 | # Load generated board configuration | |
119 | sinclude $(OBJTREE)/include/autoconf.mk | |
120 | sinclude $(OBJTREE)/include/config.mk | |
121 | ||
122 | # Some architecture config.mk files need to know what CPUDIR is set to, | |
123 | # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files. | |
124 | # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains | |
125 | # CPU-specific code. | |
126 | CPUDIR=arch/$(ARCH)/cpu/$(CPU) | |
127 | ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR))) | |
128 | CPUDIR=arch/$(ARCH)/cpu | |
129 | endif | |
130 | ||
131 | sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules | |
132 | sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules | |
133 | ||
134 | ifdef SOC | |
135 | sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules | |
136 | endif | |
137 | ifdef VENDOR | |
138 | BOARDDIR = $(VENDOR)/$(BOARD) | |
139 | else | |
140 | BOARDDIR = $(BOARD) | |
141 | endif | |
142 | ifdef BOARD | |
143 | sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules | |
144 | endif | |
145 | ||
146 | ######################################################################### | |
147 | ||
148 | ifneq (,$(findstring s,$(MAKEFLAGS))) | |
149 | ARFLAGS = cr | |
150 | else | |
151 | ARFLAGS = crv | |
152 | endif | |
153 | RELFLAGS= $(PLATFORM_RELFLAGS) | |
154 | DBGFLAGS= -g # -DDEBUG | |
155 | OPTFLAGS= -Os #-fomit-frame-pointer | |
156 | ifndef LDSCRIPT | |
157 | #LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug | |
158 | ifeq ($(CONFIG_NAND_U_BOOT),y) | |
159 | LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds | |
160 | else | |
161 | LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds | |
162 | endif | |
163 | endif | |
164 | OBJCFLAGS += --gap-fill=0xff | |
165 | ||
166 | gccincdir := $(shell $(CC) -print-file-name=include) | |
167 | ||
168 | CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \ | |
169 | -D__KERNEL__ | |
170 | ifneq ($(CONFIG_SYS_TEXT_BASE),) | |
171 | CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE) | |
172 | endif | |
173 | ||
174 | ifneq ($(RESET_VECTOR_ADDRESS),) | |
175 | CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS) | |
176 | endif | |
177 | ||
178 | ifneq ($(OBJTREE),$(SRCTREE)) | |
179 | CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include | |
180 | endif | |
181 | ||
182 | CPPFLAGS += -I$(TOPDIR)/include | |
183 | CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \ | |
184 | -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS) | |
185 | ||
186 | ifdef BUILD_TAG | |
187 | CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \ | |
188 | -DBUILD_TAG='"$(BUILD_TAG)"' | |
189 | else | |
190 | CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes | |
191 | endif | |
192 | ||
193 | CFLAGS += $(call cc-option,-fno-stack-protector) | |
194 | ||
195 | # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format> | |
196 | # option to the assembler. | |
197 | AFLAGS_DEBUG := | |
198 | ||
199 | # turn jbsr into jsr for m68k | |
200 | ifeq ($(ARCH),m68k) | |
201 | ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4) | |
202 | AFLAGS_DEBUG := -Wa,-gstabs,-S | |
203 | endif | |
204 | endif | |
205 | ||
206 | AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS) | |
207 | ||
208 | LDFLAGS += $(PLATFORM_LDFLAGS) | |
209 | LDFLAGS_FINAL += -Bstatic | |
210 | ||
211 | LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL) | |
212 | ifneq ($(CONFIG_SYS_TEXT_BASE),) | |
213 | LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE) | |
214 | endif | |
215 | ||
216 | # Location of a usable BFD library, where we define "usable" as | |
217 | # "built for ${HOST}, supports ${TARGET}". Sensible values are | |
218 | # - When cross-compiling: the root of the cross-environment | |
219 | # - Linux/ppc (native): /usr | |
220 | # - NetBSD/ppc (native): you lose ... (must extract these from the | |
221 | # binutils build directory, plus the native and U-Boot include | |
222 | # files don't like each other) | |
223 | # | |
224 | # So far, this is used only by tools/gdb/Makefile. | |
225 | ||
226 | ifeq ($(HOSTOS),darwin) | |
227 | BFD_ROOT_DIR = /usr/local/tools | |
228 | else | |
229 | ifeq ($(HOSTARCH),$(ARCH)) | |
230 | # native | |
231 | BFD_ROOT_DIR = /usr | |
232 | else | |
233 | #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386 | |
234 | #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386 | |
235 | BFD_ROOT_DIR = /opt/powerpc | |
236 | endif | |
237 | endif | |
238 | ||
239 | ######################################################################### | |
240 | ||
241 | export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \ | |
242 | AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE | |
243 | export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS | |
244 | ||
245 | ######################################################################### | |
246 | ||
247 | # Allow boards to use custom optimize flags on a per dir/file basis | |
248 | BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%)) | |
249 | ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR)) | |
250 | ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) | |
251 | $(obj)%.s: %.S | |
252 | $(CPP) $(ALL_AFLAGS) -o $@ $< | |
253 | $(obj)%.o: %.S | |
254 | $(CC) $(ALL_AFLAGS) -o $@ $< -c | |
255 | $(obj)%.o: %.c | |
256 | $(CC) $(ALL_CFLAGS) -o $@ $< -c | |
257 | $(obj)%.i: %.c | |
258 | $(CPP) $(ALL_CFLAGS) -o $@ $< -c | |
259 | $(obj)%.s: %.c | |
260 | $(CC) $(ALL_CFLAGS) -o $@ $< -c -S | |
261 | ||
262 | ######################################################################### | |
263 | ||
264 | # If the list of objects to link is empty, just create an empty built-in.o | |
265 | cmd_link_o_target = $(if $(strip $1),\ | |
266 | $(LD) $(LDFLAGS) -r -o $@ $1,\ | |
267 | rm -f $@; $(AR) rcs $@ ) | |
268 | ||
269 | ######################################################################### |