U-BOOT master makefile code

#
# (C) Copyright 2000-2006
# Wolfgang Denk, denx software engineering, wd@denx.de.
#
# See File credits for list of people who contributed to this
# Project.
#
# This program is free software; you can redistribute it and/or
# Modify it under the terms of the GNU General Public License
# Published by the Free Software foundatio; either version 2
# The license, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# But without any warranty; without even the implied warranty
# Merchantability or fitness for a special purpose. See
# GNU General Public License for more details.
#
# You shoshould have written ed a copy of the GNU General Public License
# Along with this program; if not, write to the Free Software
# Foundation, inc., 59 temple place, Suite 330, Boston,
# Ma 02111-1307 USA
#

Version = 1
Patchlevel = 1
Sublevel = 6
Extraversion =
U_boot_version = $ (Version). $ (patchlevel). $ (sublevel) $ (extraversion)
Version_file = $ (OBJ) include/version_autogenerated.h

Hostarch: = $ (shell uname-M |/
Sed-e s/I .86/i386 //
-E s/sun4u/sparc64 //
-E s/arm. */ARM //
-E s/sa110/ARM //
-E s/PowerPC/PPC //
-E s/macppc/PPC /)

Hostos: = $ (shell uname-S | tr '[: Upper:] ''[: lower:]' |/
Sed-E's // (cygwin/). */cygwin /')

Export hostarch Hostos

# Deal with colliding definitions from tcsh etc.
Vendor =

######################################## #################################
#
# U-boot build supports producing a object files to the separate external
# Directory. Two use cases are supported:
#
#1) add O = to the make command line
# 'Make o =/tmp/build all'
#
#2) Set environement variable build_dir to point to the desired location
# 'Export build_dir =/tmp/build'
# 'Make'
#
# The second approach can also be used with a makeall script
# 'Export build_dir =/tmp/build'
# './Makeall'
#
# Command line 'o = 'setting overrides build_dir environent variable.
#
# When none of the above methods is used the local build is saved med and
# The object files are placed in the source directory.
#

Ifdef o // If O is defined
Ifeq ("$ (Origin O)", "command line ")
Build_dir: = $ (o)
Endif
Endif

Ifneq ($ (build_dir ),)
Saved-output: = $ (build_dir)

# Attempt to create a output directory.
$ (Shell [-d $ {build_dir}] | mkdir-p $ {build_dir })

# Verify if it was successful.
Build_dir: = $ (shell CD $ (build_dir) &/bin/pwd)
$ (If $ (build_dir), $ (error output directory "$ (saved-output)" does not exist ))
Endif # ifneq ($ (build_dir ),)

# Objtree and lndir stores the directory of generated files, and the srctree and topdir directories store the source code.
Objtree: =$ (if $ (build_dir), $ (build_dir), $ (curdir ))
Srctree: = $ (curdir)
Topdir: = $ (srctree)
Lndir: = $ (objtree)
Export topdir srctree objtree

# Mkconfig point to the mkconfig script in the top-level directory
Mkconfig: = $ (srctree)/mkconfig
Export mkconfig

Ifneq ($ (objtree), $ (srctree ))
Remote_build: = 1
Export remote_build
Endif

# $ (OBJ) and (SRC) are defined in config. mk but here in main makefile
# We also need them before config. mk is wrongly ded which is the case
# Some targets like unconfig, clean, clobber, distclean, etc.
Ifneq ($ (objtree), $ (srctree ))
OBJ: = $ (objtree )/
SRC: = $ (srctree )/
Else
OBJ: =
SRC: =
Endif
Export OBJ SRC

######################################## #################################

# Include/config. mk, which is equivalent to three variables named Arch, board, and CPU in makefile.
Ifeq ($ (objtree)/include/config. mk, $ (wildcard $ (objtree)/include/config. mk ))

# Load arch, board, and CPU Configuration
Include $ (objtree)/include/config. mk
Export arch CPU board vendor SOC

# The following is a cross-Compiler
Ifndef cross_compile
Ifeq ($ (hostarch), PPC)
Cross_compile =
Else
Ifeq ($ (ARCH), PPC)
Cross_compile = PowerPC-Linux-
Endif
Ifeq ($ (ARCH), arm)
Cross_compile = arm-Linux-
Endif
Ifeq ($ (ARCH), i386)
Ifeq ($ (hostarch), i386)
Cross_compile =
Else
Cross_compile = i386-linux-
Endif
Endif
Ifeq ($ (ARCH), MIPS)
Cross_compile = mips_4kc-
Endif
Ifeq ($ (ARCH), NiO)
Cross_compile = nios-elf-
Endif
Ifeq ($ (ARCH), nios2)
Cross_compile = nios2-elf-
Endif
Ifeq ($ (ARCH), m68k)
Cross_compile = m68k-elf-
Endif
Ifeq ($ (ARCH), microblaze)
Cross_compile = Mb-
Endif
Ifeq ($ (ARCH), Blackfin)
Cross_compile = bfin-elf-
Endif
Ifeq ($ (ARCH), avr32)
Cross_compile = avr32-
Endif
Endif
Endif

Export cross_compile

# Contains config. mk in the top-level directory. This file mainly defines cross-compiler and options and compilation rules.
# Load other configuration
Include $ (topdir)/config. mk

######################################## #################################
# U-boot objects... order is important (I. e. Start must be first)

Objs = CPU/$ (CPU)/start. O // The sequence is very important, and start. O must be placed at the beginning.
Ifeq ($ (CPU), i386)
Objs + = CPU/$ (CPU)/start16.o
Objs + = CPU/$ (CPU)/reset. o
Endif
Ifeq ($ (CPU), ppc4xx)
Objs + = CPU/$ (CPU)/resetvec. o
Endif
Ifeq ($ (CPU), mpc83xx)
Objs + = CPU/$ (CPU)/resetvec. o
Endif
Ifeq ($ (CPU), mpc85xx)
Objs + = CPU/$ (CPU)/resetvec. o
Endif
Ifeq ($ (CPU), mpc86xx)
Objs + = CPU/$ (CPU)/resetvec. o
Endif
Ifeq ($ (CPU), BF533)
Objs + = CPU/$ (CPU)/start1.o CPU/$ (CPU)/interrupt. o cpu/$ (CPU)/cache. o
Objs + = CPU/$ (CPU)/cplbhdlr. o cpu/$ (CPU)/cplbmgr. o cpu/$ (CPU)/flush. o
Endif

Objs: =$ (addprefix $ (OBJ), $ (objs ))

Required library files:

Libs = lib_generic/libgeneric.
Libs + = Board/$ (boarddir)/Lib $ (board).
Libs + = CPU/$ (CPU)/Lib $ (CPU).
Ifdef SOC
Libs + = CPU/$ (CPU)/$ (SOC)/Lib $ (SOC).
Endif
Libs + = lib _ $ (ARCH)/Lib $ (ARCH).
Libs + = FS/cramfs/libcramfs. A fs/fat/libfat. A fs/fdos/libfdos. A fs/jffs2/libjffs2.a/
FS/reiserfs/libreiserfs. A fs/ext2/libext2fs.
Libs + = net/Libnet.
Libs + = Disk/libdisk.
Libs + = RTC/librtc.
Libs + = DTT/libdtt.
Libs + = Drivers/libdrivers.
Libs + = Drivers/NAND/libnand.
Libs + = Drivers/nand_legacy/libnand_legacy.a
Libs + = Drivers/USB/libusb.
Libs + = Drivers/sk98lin/libsk98lin.
Libs + = Common/libcommon.
Libs + = $ (boardlibs)

Libs: =$ (addprefix $ (OBJ), $ (libs ))
. Phony: $ (libs)

# Based on the arch, CPU, board, and SOC variables defined in the include/config. mk File above.
# The Directory files on which the hardware platform depends can be determined based on these definitions.
# Smdk2410 platform related directories and corresponding library files are as follows.
# Board/smdk2410/: library file board/smdk2410/libsmdk2410.a
# CPU/ARM920T/: library file CPU/ARM920T/libarm920t.
# CPU/ARM920T/s3c24x0/: library file CPU/ARM920T/s3c24x0/libs3c24x0.
# Lib_arm/: library file lib_arm/libarm.
# Include/ASM-arm/: The following two are header files.
# Include/configs/smdk2410.h

 

# Add GCC lib
Platform_libs + =-L $ (shell dirname '$ (CC) $ (cflags)-print-libgcc-file-name ') -lgcc-LC-L/usr/local/ARM/4.3.2/ARM-None-Linux-gnueabi/libc/armv4t/usr/lib

# The "Tools" are needed early, so put this first
# Don't include stuff already done in $ (libs)
@ Execute the make file under the tools, examples, post, post/CPU subdirectory
Subdirs = tools/
Examples/
Post/
Post/CPU
. Phony: $ (subdirs)

Ifeq ($ (config_nand_u_boot), Y)
Nand_spl = nand_spl
U_boot_nand = $ (OBJ) u-boot-nand.bin
Endif

_ Objs: = $ (SUBST $ (OBJ), $ (objs ))
_ Libs: = $ (SUBST $ (OBJ), $ (libs ))

######################################## #################################
######################################## #################################
# Final image files:

All = $ (OBJ) u-boot.srec $ (OBJ) u-boot.bin $ (OBJ) system. Map $ (u_boot_nand)

ALL: $ (all)

$ (OBJ) u-boot.hex: $ (OBJ) U-boot
$ (Objcopy) $ {objcflags}-O ihex $ <$ @

$ (OBJ) u-boot.srec: $ (OBJ) U-boot
$ (Objcopy) $ {objcflags}-o srec $ <$ @

$ (OBJ) u-boot.bin: $ (OBJ) U-boot
$ (Objcopy) $ {objcflags}-O binary $ <$ @

$ (OBJ) u-boot.img: $ (OBJ) u-boot.bin
./Tools/mkimage-A $ (ARCH)-T Firmware-c none/
-A $ (text_base)-E 0/
-N $ (shell sed-n-e's/. * u_boot_version // P' $ (version_file) |/
Sed-E's/"[] * $/for $ (board) Board "/')/
-D $ <$ @

$ (OBJ) u-boot.dis: $ (OBJ) U-boot
$ (Objdump)-d $ <>$ @

$ (OBJ) U-boot: depend version $ (subdirs) $ (objs) $ (libs) $ (ldscript)
Undef_sym = '$ (objdump)-x $ (libs) | sed-n-e's /. */(_ u_boot_cmd _. */)/-U/1/P' | sort | uniq ';/
CD $ (lndir) & $ (LD) $ (ldflags) $ undef_sym $ (_ objs )/
-- Start-group $ (_ libs) -- end-group $ (platform_libs )/
-Map u-boot.map-o u-boot

$ (Objs): @ CPU/start. o
Echo $ (objs)
$ (Make)-c cpu/$ (CPU) $ (if $ (remote_build), $ @, $ (notdir $ @))

$ (Libs): @ dependency target $ (libs). There are too many targets, all of which are the library files *. A in each subdirectory. Execute make in the corresponding subdirectory to complete the tasks:
$ (Make)-C $ (DIR $ (SUBST $ (OBJ), $ @))

USB:
$ (Make)-C Drivers/USB

$ (Subdirs): @ pseudo-target subdirs: Execute make files under the tools, examples, post, post/CPU sub-directories.
$ (Make)-C $ @ All

$ (Nand_spl): Version
$ (Make)-C nand_spl/board/$ (boarddir) All

$ (U_boot_nand): $ (nand_spl) $ (OBJ) u-boot.bin
Cat $ (OBJ) nand_spl/u-boot-spl-16k.bin $ (OBJ) u-boot.bin> $ (OBJ) u-boot-nand.bin

Analyze the generation of the most critical U-boot ELF File image: (for details, see makefile)

Version: @ dependency target version: Generate version information to version_file.
@ Echo-n "# define u_boot_version/" U-Boot ">$ (version_file );/
Echo-n "$ (u_boot_version)" >$ (version_file );/
Echo-N $ (shell $ (config_shell) $ (topdir)/tools/setlocalversion/
$ (Topdir) >>$ (version_file );/
Echo "/" ">>$ (version_file)

Gdbtools:
$ (Make)-C tools/GDB all | Exit 1

Updater:
$ (Make)-C tools/Updater all | Exit 1

Env:
$ (Make)-C tools/ENV all | Exit 1

Depend Dep: @ dependency target depend: generate the. Depend file for each subdirectory, And. Depend lists the dependent files of each target file.
@ Generate method: Call make _ depend of each subdirectory.
For dir in $ (subdirs); do $ (make)-C $ dir _ depend; done

Tags ctags:
Ctags-w-o $ (objtree)/ctags 'Find $ (subdirs) include/
Lib_generic board/$ (boarddir) CPU/$ (CPU) lib _ $ (ARCH )/
FS/cramfs fs/fat fs/fdos fs/jffs2/
Net disk rtc dtt drivers Drivers/sk98lin common/
/(-Name CVS-prune/)-O/(-name '*. [CH]'-print /)'

Etags:
Etags-a-o $ (objtree)/etags 'Find $ (subdirs) include/
Lib_generic board/$ (boarddir) CPU/$ (CPU) lib _ $ (ARCH )/
FS/cramfs fs/fat fs/fdos fs/jffs2/
Net disk rtc dtt drivers Drivers/sk98lin common/
/(-Name CVS-prune/)-O/(-name '*. [CH]'-print /)'

$ (OBJ) system. MAP: $ (OBJ) U-boot
@ $ (Nm) $ <|/
Grep-V '/(Compiled/)/| /(/. o $/)/|/([auw]/)/| /(/. /. ng $/)/|/(lash [RL] di/) '|/
Sort> $ (OBJ) system. Map

######################################## #################################
Else
All $ (OBJ) u-boot.hex $ (OBJ) u-boot.srec $ (OBJ) u-boot.bin/
$ (OBJ) u-boot.img $ (OBJ) u-boot.dis $ (OBJ) U-boot/
$ (Subdirs) version gdbtools Updater env depend/
Dep tags ctags etags $ (OBJ) system. MAP:
@ Echo "system not configured-see readme"> & 2
@ Exit 1
Endif

. Phony: changelog
Changelog:
Git log -- no-merges U-Boot-1_1_5 .. |/
Unexpand-A | sed-E's // S/S * $ // '> $ @