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