config.mk 8.9 KB

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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. ifeq ($(CURDIR),$(SRCTREE))
  25. dir :=
  26. else
  27. dir := $(subst $(SRCTREE)/,,$(CURDIR))
  28. endif
  29. ifneq ($(OBJTREE),$(SRCTREE))
  30. # Create object files for SPL in a separate directory
  31. ifeq ($(CONFIG_SPL_BUILD),y)
  32. obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
  33. else
  34. obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
  35. endif
  36. src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
  37. $(shell mkdir -p $(obj))
  38. else
  39. # Create object files for SPL in a separate directory
  40. ifeq ($(CONFIG_SPL_BUILD),y)
  41. obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
  42. $(shell mkdir -p $(obj))
  43. else
  44. obj :=
  45. endif
  46. src :=
  47. endif
  48. # clean the slate ...
  49. PLATFORM_RELFLAGS =
  50. PLATFORM_CPPFLAGS =
  51. PLATFORM_LDFLAGS =
  52. #########################################################################
  53. HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
  54. $(HOSTCPPFLAGS)
  55. HOSTSTRIP = strip
  56. #
  57. # Mac OS X / Darwin's C preprocessor is Apple specific. It
  58. # generates numerous errors and warnings. We want to bypass it
  59. # and use GNU C's cpp. To do this we pass the -traditional-cpp
  60. # option to the compiler. Note that the -traditional-cpp flag
  61. # DOES NOT have the same semantics as GNU C's flag, all it does
  62. # is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
  63. #
  64. # Apple's linker is similar, thanks to the new 2 stage linking
  65. # multiple symbol definitions are treated as errors, hence the
  66. # -multiply_defined suppress option to turn off this error.
  67. #
  68. ifeq ($(HOSTOS),darwin)
  69. # get major and minor product version (e.g. '10' and '6' for Snow Leopard)
  70. DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.')
  71. DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.')
  72. os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \
  73. $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)
  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 += $(call os_x_before, 10, 5, "-multiply_defined suppress")
  78. else
  79. HOSTCC = gcc
  80. endif
  81. ifeq ($(HOSTOS),cygwin)
  82. HOSTCFLAGS += -ansi
  83. endif
  84. # We build some files with extra pedantic flags to try to minimize things
  85. # that won't build on some weird host compiler -- though there are lots of
  86. # exceptions for files that aren't complaint.
  87. HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS))
  88. HOSTCFLAGS += -pedantic
  89. #########################################################################
  90. #
  91. # Option checker (courtesy linux kernel) to ensure
  92. # only supported compiler options are used
  93. #
  94. cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
  95. > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
  96. #
  97. # Include the make variables (CC, etc...)
  98. #
  99. AS = $(CROSS_COMPILE)as
  100. LD = $(CROSS_COMPILE)ld
  101. CC = $(CROSS_COMPILE)gcc
  102. CPP = $(CC) -E
  103. AR = $(CROSS_COMPILE)ar
  104. NM = $(CROSS_COMPILE)nm
  105. LDR = $(CROSS_COMPILE)ldr
  106. STRIP = $(CROSS_COMPILE)strip
  107. OBJCOPY = $(CROSS_COMPILE)objcopy
  108. OBJDUMP = $(CROSS_COMPILE)objdump
  109. RANLIB = $(CROSS_COMPILE)RANLIB
  110. #########################################################################
  111. # Load generated board configuration
  112. sinclude $(OBJTREE)/include/autoconf.mk
  113. sinclude $(OBJTREE)/include/config.mk
  114. # Some architecture config.mk files need to know what CPUDIR is set to,
  115. # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
  116. # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
  117. # CPU-specific code.
  118. CPUDIR=arch/$(ARCH)/cpu/$(CPU)
  119. ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
  120. CPUDIR=arch/$(ARCH)/cpu
  121. endif
  122. sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
  123. sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
  124. ifdef SOC
  125. sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
  126. endif
  127. ifdef VENDOR
  128. BOARDDIR = $(VENDOR)/$(BOARD)
  129. else
  130. BOARDDIR = $(BOARD)
  131. endif
  132. ifdef BOARD
  133. sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
  134. endif
  135. #########################################################################
  136. ifneq (,$(findstring s,$(MAKEFLAGS)))
  137. ARFLAGS = cr
  138. else
  139. ARFLAGS = crv
  140. endif
  141. RELFLAGS= $(PLATFORM_RELFLAGS)
  142. DBGFLAGS= -g # -DDEBUG
  143. OPTFLAGS= -Os #-fomit-frame-pointer
  144. OBJCFLAGS += --gap-fill=0xff
  145. gccincdir := $(shell $(CC) -print-file-name=include)
  146. CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
  147. -D__KERNEL__
  148. # Enable garbage collection of un-used sections for SPL
  149. ifeq ($(CONFIG_SPL_BUILD),y)
  150. CPPFLAGS += -ffunction-sections -fdata-sections
  151. LDFLAGS_FINAL += --gc-sections
  152. endif
  153. ifneq ($(CONFIG_SYS_TEXT_BASE),)
  154. CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
  155. endif
  156. ifneq ($(CONFIG_SPL_TEXT_BASE),)
  157. CPPFLAGS += -DCONFIG_SPL_TEXT_BASE=$(CONFIG_SPL_TEXT_BASE)
  158. endif
  159. ifeq ($(CONFIG_SPL_BUILD),y)
  160. CPPFLAGS += -DCONFIG_SPL_BUILD
  161. endif
  162. ifneq ($(RESET_VECTOR_ADDRESS),)
  163. CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
  164. endif
  165. ifneq ($(OBJTREE),$(SRCTREE))
  166. CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
  167. endif
  168. CPPFLAGS += -I$(TOPDIR)/include
  169. CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
  170. -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
  171. ifdef BUILD_TAG
  172. CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
  173. -DBUILD_TAG='"$(BUILD_TAG)"'
  174. else
  175. CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
  176. endif
  177. CFLAGS += $(call cc-option,-fno-stack-protector)
  178. # Some toolchains enable security related warning flags by default,
  179. # but they don't make much sense in the u-boot world, so disable them.
  180. CFLAGS += $(call cc-option,-Wno-format-nonliteral)
  181. CFLAGS += $(call cc-option,-Wno-format-security)
  182. # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
  183. # option to the assembler.
  184. AFLAGS_DEBUG :=
  185. # turn jbsr into jsr for m68k
  186. ifeq ($(ARCH),m68k)
  187. ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
  188. AFLAGS_DEBUG := -Wa,-gstabs,-S
  189. endif
  190. endif
  191. AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
  192. LDFLAGS += $(PLATFORM_LDFLAGS)
  193. LDFLAGS_FINAL += -Bstatic
  194. LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
  195. ifneq ($(CONFIG_SYS_TEXT_BASE),)
  196. LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
  197. endif
  198. LDFLAGS_u-boot-spl += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
  199. ifneq ($(CONFIG_SPL_TEXT_BASE),)
  200. LDFLAGS_u-boot-spl += -Ttext $(CONFIG_SPL_TEXT_BASE)
  201. endif
  202. # Location of a usable BFD library, where we define "usable" as
  203. # "built for ${HOST}, supports ${TARGET}". Sensible values are
  204. # - When cross-compiling: the root of the cross-environment
  205. # - Linux/ppc (native): /usr
  206. # - NetBSD/ppc (native): you lose ... (must extract these from the
  207. # binutils build directory, plus the native and U-Boot include
  208. # files don't like each other)
  209. #
  210. # So far, this is used only by tools/gdb/Makefile.
  211. ifeq ($(HOSTOS),darwin)
  212. BFD_ROOT_DIR = /usr/local/tools
  213. else
  214. ifeq ($(HOSTARCH),$(ARCH))
  215. # native
  216. BFD_ROOT_DIR = /usr
  217. else
  218. #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
  219. #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
  220. BFD_ROOT_DIR = /opt/powerpc
  221. endif
  222. endif
  223. #########################################################################
  224. export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
  225. AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
  226. export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
  227. #########################################################################
  228. # Allow boards to use custom optimize flags on a per dir/file basis
  229. BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
  230. ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
  231. ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
  232. $(obj)%.s: %.S
  233. $(CPP) $(ALL_AFLAGS) -o $@ $<
  234. $(obj)%.o: %.S
  235. $(CC) $(ALL_AFLAGS) -o $@ $< -c
  236. $(obj)%.o: %.c
  237. $(CC) $(ALL_CFLAGS) -o $@ $< -c
  238. $(obj)%.i: %.c
  239. $(CPP) $(ALL_CFLAGS) -o $@ $< -c
  240. $(obj)%.s: %.c
  241. $(CC) $(ALL_CFLAGS) -o $@ $< -c -S
  242. #########################################################################
  243. # If the list of objects to link is empty, just create an empty built-in.o
  244. cmd_link_o_target = $(if $(strip $1),\
  245. $(LD) $(LDFLAGS) -r -o $@ $1,\
  246. rm -f $@; $(AR) rcs $@ )
  247. #########################################################################