makefile.arm

本源码是将述嵌入式LINUX驱动程序例程

# This material is inherited from the Linux Makefile: arch/arm/Makefile:
# (2.4.0.-test6 official)  -- maybe the last part is not needed, though
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies. Remember to do have actions
# for "archclean" and "archdep" for cleaning up and making dependencies for
# this architecture
#
# This file is subject to the terms and conditions of the GNU General Public
# License.  See the file "COPYING" in the main directory of this archive
# for more details.
#
# Copyright (C) 1995-1999 by Russell King

OBJCOPY		:= $(CROSS_COMPILE)objcopy -O binary -R .note -R .comment -S
CPP		:= $(CC) -E
LINKFLAGS	:= -p -X -T arch/arm/vmlinux.lds
ARCHCC		:= $(word 1,$(CC))

AFLAGS		+= -mno-fpu
CFLAGS_PIPE	:= -pipe
CFLAGS		:= $(CFLAGS) $(CFLAGS_PIPE) -msoft-float

ifdef CONFIG_FRAME_POINTER
CFLAGS		:= $(CFLAGS:-fomit-frame-pointer=)
endif

ifdef CONFIG_DEBUG_INFO
CFLAGS		+= -g
endif

GZFLAGS		= -9

# Ensure this is ld "2.9.4" or later
NEW_LINKER	:= $(shell if $(LD) --gc-sections --version >/dev/null 2>&1; then echo y; else echo n; fi)

ifneq ($(NEW_LINKER),y)
dummy:;		@echo '*** ${VERSION}.${PATCHLEVEL} kernels no longer build correctly with old versions of binutils.'
		@echo '*** Please upgrade your binutils to 2.9.5.'
		@false
endif

# GCC 2.7 uses different options to later compilers; sort out which we have
NEW_GCC		:= $(shell if $(CC) --version 2>&1 | grep '^2\.7' > /dev/null; then echo n; else echo y; fi)

#
# select flags depending on the compiler
#
ifeq ($(NEW_GCC),y)
CFLAGS			+= -mshort-load-bytes
CFLAGS_PROC_CPU_26	:= -mcpu=arm3 -Os
CFLAGS_PROC_CPU_32v3	:= -march=armv3
CFLAGS_PROC_CPU_32v4	:= -march=armv4
CFLAGS_ARM6		:= -mtune=arm6
CFLAGS_ARM7		:= -mtune=arm7
CFLAGS_ARM720		:= -mtune=arm7tdmi
CFLAGS_SA110		:= -mtune=strongarm110
else
CFLAGS			+= -DNO_TEXT_SECTIONS
CFLAGS_PROC_CPU_26	:= -m3
CFLAGS_PROC_CPU_32v3	:=
CFLAGS_PROC_CPU_32v4	:=
CFLAGS_ARM6		:= -m6
CFLAGS_ARM7		:= -m6
CFLAGS_ARM720		:= -m6
CFLAGS_SA110		:= -m6
endif

#
# Select CPU dependent flags
#
ifeq ($(CONFIG_CPU_26),y)
 PROCESSOR	 = armo
 TEXTADDR	 = 0x02080000
 CFLAGS		+= $(CFLAGS_PROC_CPU_26)
 AFLAGS		+= -mapcs-26
endif

ifeq ($(CONFIG_CPU_32),y)
 PROCESSOR	 = armv
 TEXTADDR	 = 0xC0008000
 ifeq ($(CONFIG_CPU_32v4),y)
  CFLAGS	+= $(CFLAGS_PROC_CPU_32v4)
  AFLAGS	+= -mapcs-32 -marmv4
 else
  CFLAGS	+= $(CFLAGS_PROC_CPU_32v3)
  AFLAGS	+= -mapcs-32 -marmv3m
 endif
 #
 # Exactly one of the following must be selected
 #
 ifeq ($(CONFIG_CPU_ARM6),y)
  CFLAGS	+= $(CFLAGS_ARM6)
 else
 ifeq ($(CONFIG_CPU_ARM7),y)
  CFLAGS	+= $(CFLAGS_ARM7)
 else
 ifeq ($(CONFIG_CPU_ARM720),y)
  CFLAGS	+= $(CFLAGS_ARM720)
 else
 ifeq ($(CONFIG_CPU_SA110),y)
  CFLAGS	+= $(CFLAGS_SA110)
 else
 ifeq ($(CONFIG_CPU_SA1100),y)
  CFLAGS	+= $(CFLAGS_SA110)
 endif
 endif
 endif
 endif
 endif
endif

LIBGCC		:= $(shell $(CC) $(CFLAGS) --print-libgcc-file-name)

export	LIBGCC MACHINE PROCESSOR TEXTADDR GZFLAGS

ifeq ($(CONFIG_ARCH_ARCA5K),y)
MACHINE		 = arc
ARCHDIR		 = arc
endif

ifeq ($(CONFIG_ARCH_RPC),y)
MACHINE		 = rpc
ARCHDIR		 = rpc
endif

ifeq ($(CONFIG_ARCH_EBSA110),y)
MACHINE		 = ebsa110
ARCHDIR		 = ebsa110
endif

ifeq ($(CONFIG_ARCH_CLPS7500),y)
MACHINE		 = clps7500
ARCHDIR		 = cl7500
endif

ifeq ($(CONFIG_FOOTBRIDGE),y)
MACHINE		 = footbridge
ARCHDIR		 = ebsa285
endif

ifeq ($(CONFIG_ARCH_CO285),y)
TEXTADDR	 = 0x60008000
endif

ifeq ($(CONFIG_ARCH_NEXUSPCI),y)
MACHINE		 = nexuspci
ARCHDIR		 = nexuspci
endif

ifeq ($(CONFIG_ARCH_SHARK),y)
MACHINE		 = shark
ARCHDIR		 = shark
endif

ifeq ($(CONFIG_ARCH_SA1100),y)
MACHINE		 = sa1100
ARCHDIR		 = sa1100
endif

ifeq ($(CONFIG_ARCH_L7200),y)
MACHINE		 = l7200
ARCHDIR		 = l7200
endif