2 # (C) Copyright 2000-2013
3 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 # SPDX-License-Identifier: GPL-2.0+
7 #########################################################################
9 ifeq ($(CURDIR
),$(SRCTREE
))
12 dir := $(subst $(SRCTREE
)/,,$(CURDIR
))
15 ifneq ($(OBJTREE
),$(SRCTREE
))
16 # Create object files for SPL in a separate directory
17 ifeq ($(CONFIG_SPL_BUILD
),y
)
18 ifeq ($(CONFIG_TPL_BUILD
),y
)
19 obj
:= $(if
$(dir),$(TPLTREE
)/$(dir)/,$(TPLTREE
)/)
21 obj
:= $(if
$(dir),$(SPLTREE
)/$(dir)/,$(SPLTREE
)/)
24 obj
:= $(if
$(dir),$(OBJTREE
)/$(dir)/,$(OBJTREE
)/)
26 src
:= $(if
$(dir),$(SRCTREE
)/$(dir)/,$(SRCTREE
)/)
28 $(shell mkdir
-p
$(obj
))
30 # Create object files for SPL in a separate directory
31 ifeq ($(CONFIG_SPL_BUILD
),y
)
32 ifeq ($(CONFIG_TPL_BUILD
),y
)
33 obj
:= $(if
$(dir),$(TPLTREE
)/$(dir)/,$(TPLTREE
)/)
35 obj
:= $(if
$(dir),$(SPLTREE
)/$(dir)/,$(SPLTREE
)/)
38 $(shell mkdir
-p
$(obj
))
50 #########################################################################
52 # Load generated board configuration
53 ifeq ($(CONFIG_TPL_BUILD
),y
)
54 # Include TPL autoconf
55 sinclude
$(OBJTREE
)/include/tpl-autoconf.mk
57 ifeq ($(CONFIG_SPL_BUILD
),y
)
58 # Include SPL autoconf
59 sinclude
$(OBJTREE
)/include/spl-autoconf.mk
61 # Include normal autoconf
62 sinclude
$(OBJTREE
)/include/autoconf.mk
65 sinclude
$(OBJTREE
)/include/config.mk
67 # Some architecture config.mk files need to know what CPUDIR is set to,
68 # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
69 # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
71 CPUDIR
=arch
/$(ARCH
)/cpu
/$(CPU
)
72 ifneq ($(SRCTREE
)/$(CPUDIR
),$(wildcard $(SRCTREE
)/$(CPUDIR
)))
73 CPUDIR
=arch
/$(ARCH
)/cpu
76 sinclude
$(TOPDIR
)/arch
/$(ARCH
)/config.mk
# include architecture dependend rules
77 sinclude
$(TOPDIR
)/$(CPUDIR
)/config.mk
# include CPU specific rules
80 sinclude
$(TOPDIR
)/$(CPUDIR
)/$(SOC
)/config.mk
# include SoC specific rules
83 BOARDDIR
= $(VENDOR
)/$(BOARD
)
88 sinclude
$(TOPDIR
)/board
/$(BOARDDIR
)/config.mk
# include board specific rules
91 #########################################################################
93 # We don't actually use $(ARFLAGS) anywhere anymore, so catch people
94 # who are porting old code to latest mainline but not updating $(AR).
95 ARFLAGS
= $(error update your Makefile to use cmd_link_o_target and not AR
)
96 RELFLAGS
= $(PLATFORM_RELFLAGS
)
97 DBGFLAGS
= -g
# -DDEBUG
98 OPTFLAGS
= -Os
#-fomit-frame-pointer
100 OBJCFLAGS
+= --gap-fill
=0xff
102 gccincdir
:= $(shell $(CC
) -print-file-name
=include)
104 CPPFLAGS
:= $(DBGFLAGS
) $(OPTFLAGS
) $(RELFLAGS
) \
107 # Enable garbage collection of un-used sections for SPL
108 ifeq ($(CONFIG_SPL_BUILD
),y
)
109 CPPFLAGS
+= -ffunction-sections
-fdata-sections
110 LDFLAGS_FINAL
+= --gc-sections
113 ifneq ($(CONFIG_SYS_TEXT_BASE
),)
114 CPPFLAGS
+= -DCONFIG_SYS_TEXT_BASE
=$(CONFIG_SYS_TEXT_BASE
)
117 ifeq ($(CONFIG_SPL_BUILD
),y
)
118 CPPFLAGS
+= -DCONFIG_SPL_BUILD
119 ifeq ($(CONFIG_TPL_BUILD
),y
)
120 CPPFLAGS
+= -DCONFIG_TPL_BUILD
124 # Does this architecture support generic board init?
125 ifeq ($(__HAVE_ARCH_GENERIC_BOARD
),)
126 ifneq ($(CONFIG_SYS_GENERIC_BOARD
),)
127 CHECK_GENERIC_BOARD
= $(error Your architecture does not support generic board. \
128 Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file
)
132 ifneq ($(OBJTREE
),$(SRCTREE
))
133 CPPFLAGS
+= -I
$(OBJTREE
)/include
136 CPPFLAGS
+= -I
$(TOPDIR
)/include -I
$(SRCTREE
)/arch
/$(ARCH
)/include
137 CPPFLAGS
+= -fno-builtin
-ffreestanding
-nostdinc \
138 -isystem
$(gccincdir
) -pipe
$(PLATFORM_CPPFLAGS
)
140 CFLAGS
:= $(CPPFLAGS
) -Wall
-Wstrict-prototypes
143 CFLAGS
+= -DBUILD_TAG
='"$(BUILD_TAG)"'
146 CFLAGS_SSP
:= $(call cc-option
,-fno-stack-protector
)
147 CFLAGS
+= $(CFLAGS_SSP
)
148 # Some toolchains enable security related warning flags by default,
149 # but they don't make much sense in the u-boot world, so disable them.
150 CFLAGS_WARN
:= $(call cc-option
,-Wno-format-nonliteral
) \
151 $(call cc-option
,-Wno-format-security
)
152 CFLAGS
+= $(CFLAGS_WARN
)
154 # Report stack usage if supported
155 CFLAGS_STACK
:= $(call cc-option
,-fstack-usage
)
156 CFLAGS
+= $(CFLAGS_STACK
)
158 BCURDIR
= $(subst $(SRCTREE
)/,,$(CURDIR
:$(obj
)%=%))
160 ifeq ($(findstring examples
/,$(BCURDIR
)),)
161 ifeq ($(CONFIG_SPL_BUILD
),)
163 CFLAGS
+= -finstrument-functions
-DFTRACE
168 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
169 # option to the assembler.
172 # turn jbsr into jsr for m68k
174 ifeq ($(findstring 3.4,$(shell $(CC
) --version
)),3.4)
175 AFLAGS_DEBUG
:= -Wa
,-gstabs
,-S
179 AFLAGS
:= $(AFLAGS_DEBUG
) -D__ASSEMBLY__
$(CPPFLAGS
)
181 LDFLAGS
+= $(PLATFORM_LDFLAGS
)
182 LDFLAGS_FINAL
+= -Bstatic
184 LDFLAGS_u-boot
+= -T
$(obj
)u-boot.lds
$(LDFLAGS_FINAL
)
185 ifneq ($(CONFIG_SYS_TEXT_BASE
),)
186 LDFLAGS_u-boot
+= -Ttext
$(CONFIG_SYS_TEXT_BASE
)
189 LDFLAGS_
$(SPL_BIN
) += -T
$(obj
)u-boot-spl.lds
$(LDFLAGS_FINAL
)
190 ifneq ($(CONFIG_SPL_TEXT_BASE
),)
191 LDFLAGS_
$(SPL_BIN
) += -Ttext
$(CONFIG_SPL_TEXT_BASE
)
194 #########################################################################
196 export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS