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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 $(obj)) | |
37 | else | |
38 | obj := | |
39 | src := | |
40 | endif | |
41 | ||
42 | # clean the slate ... | |
43 | PLATFORM_RELFLAGS = | |
44 | PLATFORM_CPPFLAGS = | |
45 | PLATFORM_LDFLAGS = | |
46 | ||
47 | # | |
48 | # When cross-compiling on NetBSD, we have to define __PPC__ or else we | |
49 | # will pick up a va_list declaration that is incompatible with the | |
50 | # actual argument lists emitted by the compiler. | |
51 | # | |
52 | # [Tested on NetBSD/i386 1.5 + cross-powerpc-netbsd-1.3] | |
53 | ||
54 | ifeq ($(ARCH),ppc) | |
55 | ifeq ($(CROSS_COMPILE),powerpc-netbsd-) | |
56 | PLATFORM_CPPFLAGS+= -D__PPC__ | |
57 | endif | |
58 | ifeq ($(CROSS_COMPILE),powerpc-openbsd-) | |
59 | PLATFORM_CPPFLAGS+= -D__PPC__ | |
60 | endif | |
61 | endif | |
62 | ||
63 | ifeq ($(ARCH),arm) | |
64 | ifeq ($(CROSS_COMPILE),powerpc-netbsd-) | |
65 | PLATFORM_CPPFLAGS+= -D__ARM__ | |
66 | endif | |
67 | ifeq ($(CROSS_COMPILE),powerpc-openbsd-) | |
68 | PLATFORM_CPPFLAGS+= -D__ARM__ | |
69 | endif | |
70 | endif | |
71 | ||
72 | ifeq ($(ARCH),blackfin) | |
73 | PLATFORM_CPPFLAGS+= -D__BLACKFIN__ -mno-underscore | |
74 | endif | |
75 | ||
76 | ifdef ARCH | |
77 | sinclude $(TOPDIR)/$(ARCH)_config.mk # include architecture dependend rules | |
78 | endif | |
79 | ifdef CPU | |
80 | sinclude $(TOPDIR)/cpu/$(CPU)/config.mk # include CPU specific rules | |
81 | endif | |
82 | ifdef SOC | |
83 | sinclude $(TOPDIR)/cpu/$(CPU)/$(SOC)/config.mk # include SoC specific rules | |
84 | endif | |
85 | ifdef VENDOR | |
86 | BOARDDIR = $(VENDOR)/$(BOARD) | |
87 | else | |
88 | BOARDDIR = $(BOARD) | |
89 | endif | |
90 | ifdef BOARD | |
91 | sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules | |
92 | endif | |
93 | ||
94 | ######################################################################### | |
95 | ||
96 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
97 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
98 | else echo sh; fi ; fi) | |
99 | ||
100 | ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc) | |
101 | HOSTCC = cc | |
102 | else | |
103 | HOSTCC = gcc | |
104 | endif | |
105 | HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer | |
106 | HOSTSTRIP = strip | |
107 | ||
108 | ######################################################################### | |
109 | # | |
110 | # Option checker (courtesy linux kernel) to ensure | |
111 | # only supported compiler options are used | |
112 | # | |
113 | cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ | |
114 | > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) | |
115 | ||
116 | # | |
117 | # Include the make variables (CC, etc...) | |
118 | # | |
119 | AS = $(CROSS_COMPILE)as | |
120 | LD = $(CROSS_COMPILE)ld | |
121 | CC = $(CROSS_COMPILE)gcc | |
122 | CPP = $(CC) -E | |
123 | AR = $(CROSS_COMPILE)ar | |
124 | NM = $(CROSS_COMPILE)nm | |
125 | STRIP = $(CROSS_COMPILE)strip | |
126 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
127 | OBJDUMP = $(CROSS_COMPILE)objdump | |
128 | RANLIB = $(CROSS_COMPILE)RANLIB | |
129 | ||
130 | ARFLAGS = crv | |
131 | RELFLAGS= $(PLATFORM_RELFLAGS) | |
132 | DBGFLAGS= -g # -DDEBUG | |
133 | OPTFLAGS= -Os #-fomit-frame-pointer | |
134 | ifndef LDSCRIPT | |
135 | #LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug | |
136 | ifeq ($(CONFIG_NAND_U_BOOT),y) | |
137 | LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds | |
138 | else | |
139 | LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds | |
140 | endif | |
141 | endif | |
142 | OBJCFLAGS += --gap-fill=0xff | |
143 | ||
144 | gccincdir := $(shell $(CC) -print-file-name=include) | |
145 | ||
146 | CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \ | |
147 | -D__KERNEL__ -DTEXT_BASE=$(TEXT_BASE) \ | |
148 | ||
149 | ifneq ($(OBJTREE),$(SRCTREE)) | |
150 | CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include | |
151 | endif | |
152 | ||
153 | CPPFLAGS += -I$(TOPDIR)/include | |
154 | CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \ | |
155 | -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS) | |
156 | ||
157 | ifdef BUILD_TAG | |
158 | CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \ | |
159 | -DBUILD_TAG='"$(BUILD_TAG)"' | |
160 | else | |
161 | CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes | |
162 | endif | |
163 | ||
164 | # avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9) | |
165 | # this option have to be placed behind -Wall -- that's why it is here | |
166 | ifeq ($(ARCH),nios) | |
167 | ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9) | |
168 | CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs | |
169 | endif | |
170 | endif | |
171 | ||
172 | # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format> | |
173 | # option to the assembler. | |
174 | AFLAGS_DEBUG := | |
175 | ||
176 | # turn jbsr into jsr for m68k | |
177 | ifeq ($(ARCH),m68k) | |
178 | ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4) | |
179 | AFLAGS_DEBUG := -Wa,-gstabs,-S | |
180 | endif | |
181 | endif | |
182 | ||
183 | AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS) | |
184 | ||
185 | LDFLAGS += -Bstatic -T $(LDSCRIPT) -Ttext $(TEXT_BASE) $(PLATFORM_LDFLAGS) | |
186 | ||
187 | # Location of a usable BFD library, where we define "usable" as | |
188 | # "built for ${HOST}, supports ${TARGET}". Sensible values are | |
189 | # - When cross-compiling: the root of the cross-environment | |
190 | # - Linux/ppc (native): /usr | |
191 | # - NetBSD/ppc (native): you lose ... (must extract these from the | |
192 | # binutils build directory, plus the native and U-Boot include | |
193 | # files don't like each other) | |
194 | # | |
195 | # So far, this is used only by tools/gdb/Makefile. | |
196 | ||
197 | ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc) | |
198 | BFD_ROOT_DIR = /usr/local/tools | |
199 | else | |
200 | ifeq ($(HOSTARCH),$(ARCH)) | |
201 | # native | |
202 | BFD_ROOT_DIR = /usr | |
203 | else | |
204 | #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386 | |
205 | #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386 | |
206 | BFD_ROOT_DIR = /opt/powerpc | |
207 | endif | |
208 | endif | |
209 | ||
210 | ifeq ($(PCI_CLOCK),PCI_66M) | |
211 | CFLAGS := $(CFLAGS) -DPCI_66M | |
212 | endif | |
213 | ||
214 | ######################################################################### | |
215 | ||
216 | export CONFIG_SHELL HPATH HOSTCC HOSTCFLAGS CROSS_COMPILE \ | |
217 | AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP \ | |
218 | MAKE | |
219 | export TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS | |
220 | ||
221 | ######################################################################### | |
222 | ||
223 | ifndef REMOTE_BUILD | |
224 | ||
225 | %.s: %.S | |
226 | $(CPP) $(AFLAGS) -o $@ $< | |
227 | %.o: %.S | |
228 | $(CC) $(AFLAGS) -c -o $@ $< | |
229 | %.o: %.c | |
230 | $(CC) $(CFLAGS) -c -o $@ $< | |
231 | ||
232 | else | |
233 | ||
234 | $(obj)%.s: %.S | |
235 | $(CPP) $(AFLAGS) -o $@ $< | |
236 | $(obj)%.o: %.S | |
237 | $(CC) $(AFLAGS) -c -o $@ $< | |
238 | $(obj)%.o: %.c | |
239 | $(CC) $(CFLAGS) -c -o $@ $< | |
240 | endif | |
241 | ||
242 | ######################################################################### |