xref: /openbmc/u-boot/config.mk (revision edfed1d9)
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
26ifneq ($(OBJTREE),$(SRCTREE))
27ifeq ($(CURDIR),$(SRCTREE))
28dir :=
29else
30dir := $(subst $(SRCTREE)/,,$(CURDIR))
31endif
32
33obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
34src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
35
36$(shell mkdir -p $(obj))
37else
38obj :=
39src :=
40endif
41
42# clean the slate ...
43PLATFORM_RELFLAGS =
44PLATFORM_CPPFLAGS =
45PLATFORM_LDFLAGS =
46
47#
48# When cross-compiling on NetBSD, we have to define __PPC__ or else we
49# will pick up a va_list declaration that is incompatible with the
50# actual argument lists emitted by the compiler.
51#
52# [Tested on NetBSD/i386 1.5 + cross-powerpc-netbsd-1.3]
53
54ifeq ($(ARCH),ppc)
55ifeq ($(CROSS_COMPILE),powerpc-netbsd-)
56PLATFORM_CPPFLAGS+= -D__PPC__
57endif
58ifeq ($(CROSS_COMPILE),powerpc-openbsd-)
59PLATFORM_CPPFLAGS+= -D__PPC__
60endif
61endif
62
63ifeq ($(ARCH),arm)
64ifeq ($(CROSS_COMPILE),powerpc-netbsd-)
65PLATFORM_CPPFLAGS+= -D__ARM__
66endif
67ifeq ($(CROSS_COMPILE),powerpc-openbsd-)
68PLATFORM_CPPFLAGS+= -D__ARM__
69endif
70endif
71
72ifdef	ARCH
73sinclude $(TOPDIR)/$(ARCH)_config.mk	# include architecture dependend rules
74endif
75ifdef	CPU
76sinclude $(TOPDIR)/cpu/$(CPU)/config.mk	# include  CPU	specific rules
77endif
78ifdef	SOC
79sinclude $(TOPDIR)/cpu/$(CPU)/$(SOC)/config.mk	# include  SoC	specific rules
80endif
81ifdef	VENDOR
82BOARDDIR = $(VENDOR)/$(BOARD)
83else
84BOARDDIR = $(BOARD)
85endif
86ifdef	BOARD
87sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk	# include board specific rules
88endif
89
90# Load generated board configuration
91sinclude $(OBJTREE)/include/autoconf.mk
92
93#########################################################################
94
95CONFIG_SHELL	:= $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
96		    else if [ -x /bin/bash ]; then echo /bin/bash; \
97		    else echo sh; fi ; fi)
98
99ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc)
100HOSTCC		= cc
101else
102HOSTCC		= gcc
103endif
104HOSTCFLAGS	= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
105HOSTSTRIP	= strip
106
107#########################################################################
108#
109# Option checker (courtesy linux kernel) to ensure
110# only supported compiler options are used
111#
112cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
113		> /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
114
115#
116# Include the make variables (CC, etc...)
117#
118AS	= $(CROSS_COMPILE)as
119LD	= $(CROSS_COMPILE)ld
120CC	= $(CROSS_COMPILE)gcc
121CPP	= $(CC) -E
122AR	= $(CROSS_COMPILE)ar
123NM	= $(CROSS_COMPILE)nm
124LDR	= $(CROSS_COMPILE)ldr
125STRIP	= $(CROSS_COMPILE)strip
126OBJCOPY = $(CROSS_COMPILE)objcopy
127OBJDUMP = $(CROSS_COMPILE)objdump
128RANLIB	= $(CROSS_COMPILE)RANLIB
129
130ifneq (,$(findstring s,$(MAKEFLAGS)))
131ARFLAGS = cr
132else
133ARFLAGS = crv
134endif
135RELFLAGS= $(PLATFORM_RELFLAGS)
136DBGFLAGS= -g # -DDEBUG
137OPTFLAGS= -Os #-fomit-frame-pointer
138ifndef LDSCRIPT
139#LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
140ifeq ($(CONFIG_NAND_U_BOOT),y)
141LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds
142else
143LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
144endif
145endif
146OBJCFLAGS += --gap-fill=0xff
147
148gccincdir := $(shell $(CC) -print-file-name=include)
149
150CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS)		\
151	-D__KERNEL__
152ifneq ($(TEXT_BASE),)
153CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE)
154endif
155
156ifneq ($(OBJTREE),$(SRCTREE))
157CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
158endif
159
160CPPFLAGS += -I$(TOPDIR)/include
161CPPFLAGS += -fno-builtin -ffreestanding -nostdinc 	\
162	-isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
163
164ifdef BUILD_TAG
165CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
166	-DBUILD_TAG='"$(BUILD_TAG)"'
167else
168CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
169endif
170
171# avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9)
172# this option have to be placed behind -Wall -- that's why it is here
173ifeq ($(ARCH),nios)
174ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9)
175CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs
176endif
177endif
178
179# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
180# option to the assembler.
181AFLAGS_DEBUG :=
182
183# turn jbsr into jsr for m68k
184ifeq ($(ARCH),m68k)
185ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
186AFLAGS_DEBUG := -Wa,-gstabs,-S
187endif
188endif
189
190AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
191
192LDFLAGS += -Bstatic -T $(LDSCRIPT) $(PLATFORM_LDFLAGS)
193ifneq ($(TEXT_BASE),)
194LDFLAGS += -Ttext $(TEXT_BASE)
195endif
196
197# Location of a usable BFD library, where we define "usable" as
198# "built for ${HOST}, supports ${TARGET}".  Sensible values are
199# - When cross-compiling: the root of the cross-environment
200# - Linux/ppc (native): /usr
201# - NetBSD/ppc (native): you lose ... (must extract these from the
202#   binutils build directory, plus the native and U-Boot include
203#   files don't like each other)
204#
205# So far, this is used only by tools/gdb/Makefile.
206
207ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc)
208BFD_ROOT_DIR =		/usr/local/tools
209else
210ifeq ($(HOSTARCH),$(ARCH))
211# native
212BFD_ROOT_DIR =		/usr
213else
214#BFD_ROOT_DIR =		/LinuxPPC/CDK		# Linux/i386
215#BFD_ROOT_DIR =		/usr/pkg/cross		# NetBSD/i386
216BFD_ROOT_DIR =		/opt/powerpc
217endif
218endif
219
220ifeq ($(PCI_CLOCK),PCI_66M)
221CFLAGS := $(CFLAGS) -DPCI_66M
222endif
223
224#########################################################################
225
226export	CONFIG_SHELL HPATH HOSTCC HOSTCFLAGS CROSS_COMPILE \
227	AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP \
228	MAKE
229export	TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
230
231#########################################################################
232
233ifndef REMOTE_BUILD
234
235%.s:	%.S
236	$(CPP) $(AFLAGS) -o $@ $<
237%.o:	%.S
238	$(CC) $(AFLAGS) -c -o $@ $<
239%.o:	%.c
240	$(CC) $(CFLAGS) -c -o $@ $<
241
242else
243
244$(obj)%.s:	%.S
245	$(CPP) $(AFLAGS) -o $@ $<
246$(obj)%.o:	%.S
247	$(CC) $(AFLAGS) -c -o $@ $<
248$(obj)%.o:	%.c
249	$(CC) $(CFLAGS) -c -o $@ $<
250endif
251
252#########################################################################
253