@ -43,6 +43,78 @@ else
XECHO = :
e n d i f
# *DOCUMENTATION*
# To see a list of typical targets execute "make help"
# More info can be located in ./README
# Comments in this file are targeted only to the developer, do not
# expect to learn how to build the kernel reading this file.
# Do not:
# o use make's built-in rules and variables
# (this increases performance and avoids hard-to-debug behaviour);
# o print "Entering directory ...";
MAKEFLAGS += -rR --no-print-directory
# Avoid funny character set dependencies
u n export LC_ALL
LC_COLLATE = C
LC_NUMERIC = C
export LC_COLLATE LC_NUMERIC
# We are using a recursive build, so we need to do a little thinking
# to get the ordering right.
#
# Most importantly: sub-Makefiles should only ever modify files in
# their own directory. If in some directory we have a dependency on
# a file in another dir (which doesn't happen often, but it's often
# unavoidable when linking the built-in.o targets which finally
# turn into vmlinux), we will call a sub make in that other dir, and
# after that we are sure that everything which is in that other dir
# is now up to date.
#
# The only cases where we need to modify files which have global
# effects are thus separated out and done before the recursive
# descending is started. They are now explicitly listed as the
# prepare rule.
# To put more focus on warnings, be less verbose as default
# Use 'make V=1' to see the full commands
i f e q ( "$(origin V)" , "command line" )
KBUILD_VERBOSE = $( V)
e n d i f
i f n d e f K B U I L D _ V E R B O S E
KBUILD_VERBOSE = 0
e n d i f
# Call a source code checker (by default, "sparse") as part of the
# C compilation.
#
# Use 'make C=1' to enable checking of only re-compiled files.
# Use 'make C=2' to enable checking of *all* source files, regardless
# of whether they are re-compiled or not.
#
# See the file "Documentation/sparse.txt" for more details, including
# where to get the "sparse" utility.
i f e q ( "$(origin C)" , "command line" )
KBUILD_CHECKSRC = $( C)
e n d i f
i f n d e f K B U I L D _ C H E C K S R C
KBUILD_CHECKSRC = 0
e n d i f
# Use make M=dir to specify directory of external module to build
# Old syntax make ... SUBDIRS=$PWD is still supported
# Setting the environment variable KBUILD_EXTMOD take precedence
i f d e f S U B D I R S
KBUILD_EXTMOD ?= $( SUBDIRS)
e n d i f
i f e q ( "$(origin M)" , "command line" )
KBUILD_EXTMOD := $( M)
e n d i f
# kbuild supports saving output files in a separate directory.
# To locate output files in a separate directory two syntaxes are supported.
# In both cases the working directory must be the root of the kernel src.
@ -107,8 +179,14 @@ endif # ifeq ($(KBUILD_SRC),)
# We process the rest of the Makefile if this is the final invocation of make
i f e q ( $( skip -makefile ) , )
# If building an external module we do not care about the all: rule
# but instead _all depend on modules
PHONY += all
i f e q ( $( KBUILD_EXTMOD ) , )
_all : all
e l s e
_all : modules
e n d i f
srctree := $( if $( KBUILD_SRC) ,$( KBUILD_SRC) ,$( CURDIR) )
objtree := $( CURDIR)
@ -119,24 +197,6 @@ VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
export srctree objtree VPATH
# Call a source code checker (by default, "sparse") as part of the
# C compilation.
#
# Use 'make C=1' to enable checking of re-compiled files.
#
# See the linux kernel file "Documentation/sparse.txt" for more details,
# including where to get the "sparse" utility.
i f d e f C
i f e q ( "$(origin C)" , "command line" )
CHECKSRC := $( C)
e n d i f
e n d i f
i f n d e f C H E C K S R C
CHECKSRC = 0
e n d i f
export CHECKSRC
OBJTREE := $( objtree)
SPLTREE := $( OBJTREE) /spl
TPLTREE := $( OBJTREE) /tpl
@ -222,6 +282,78 @@ HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
HOSTLDFLAGS += $( call os_x_before, 10, 5, "-multiply_defined suppress" )
e n d i f
# Decide whether to build built-in, modular, or both.
# Normally, just do built-in.
KBUILD_MODULES :=
KBUILD_BUILTIN := 1
# If we have only "make modules", don't compile built-in objects.
# When we're building modules with modversions, we need to consider
# the built-in objects during the descend as well, in order to
# make sure the checksums are up to date before we record them.
i f e q ( $( MAKECMDGOALS ) , m o d u l e s )
KBUILD_BUILTIN := $( if $( CONFIG_MODVERSIONS) ,1)
e n d i f
# If we have "make <whatever> modules", compile modules
# in addition to whatever we do anyway.
# Just "make" or "make all" shall build modules as well
# U-Boot does not need modules
#ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
# KBUILD_MODULES := 1
#endif
#ifeq ($(MAKECMDGOALS),)
# KBUILD_MODULES := 1
#endif
export KBUILD_MODULES KBUILD_BUILTIN
export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
# Beautify output
# ---------------------------------------------------------------------------
#
# Normally, we echo the whole command before executing it. By making
# that echo $($(quiet)$(cmd)), we now have the possibility to set
# $(quiet) to choose other forms of output instead, e.g.
#
# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
#
# If $(quiet) is empty, the whole command will be printed.
# If it is set to "quiet_", only the short version will be printed.
# If it is set to "silent_", nothing will be printed at all, since
# the variable $(silent_cmd_cc_o_c) doesn't exist.
#
# A simple variant is to prefix commands with $(Q) - that's useful
# for commands that shall be hidden in non-verbose mode.
#
# $(Q)ln $@ :<
#
# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
# If KBUILD_VERBOSE equals 1 then the above command is displayed.
i f e q ( $( KBUILD_VERBOSE ) , 1 )
quiet =
Q =
e l s e
quiet = quiet_
Q = @
e n d i f
# If the user is running make -s (silent mode), suppress echoing of
# commands
i f n e q ( $( filter s % -s %,$ ( MAKEFLAGS ) ) , )
quiet = silent_
e n d i f
export quiet Q KBUILD_VERBOSE
# Look for make include files relative to root of kernel src
MAKEFLAGS += --include-dir= $( srctree)
@ -278,6 +410,31 @@ export DTC CHECK CHECKFLAGS
export KBUILD_CPPFLAGS NOSTDINC_FLAGS UBOOTINCLUDE
export KBUILD_CFLAGS KBUILD_AFLAGS
# When compiling out-of-tree modules, put MODVERDIR in the module
# tree rather than in the kernel tree. The kernel tree might
# even be read-only.
export MODVERDIR := $( if $( KBUILD_EXTMOD) ,$( firstword $( KBUILD_EXTMOD) ) /) .tmp_versions
# Files to ignore in find ... statements
RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
-o -name .pc -o -name .hg -o -name .git \) -prune -o
export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
--exclude CVS --exclude .pc --exclude .hg --exclude .git
# ===========================================================================
# Rules shared between *config targets and build targets
# Basic helpers built in scripts/
PHONY += scripts_basic
scripts_basic :
$( Q) $( MAKE) $( build) = scripts/basic
$( Q) rm -f .tmp_quiet_recordmcount
# To avoid any implicit rule to kick in, define an empty command.
scripts/basic/% : scripts_basic ;
KBUILD_CFLAGS += -Os #-fomit-frame-pointer
i f d e f B U I L D _ T A G
@ -333,6 +490,10 @@ endif
e n d i f
e n d i f
# FIX ME
cpp_flags := $( KBUILD_CPPFLAGS) $( CPPFLAGS) $( UBOOTINCLUDE) $( NOSTDINC_FLAGS)
c_flags := $( KBUILD_CFLAGS) $( cpp_flags)
# If board code explicitly specified LDSCRIPT or CONFIG_SYS_LDSCRIPT, use
# that (or fail if absent). Otherwise, search for a linker script in a
# standard location.
@ -446,12 +607,12 @@ LIBS := $(sort $(LIBS-y))
# Add GCC lib
i f d e f U S E _ P R I V A T E _ L I B G C C
i f e q ( "$(USE_PRIVATE_LIBGCC)" , "yes" )
PLATFORM_LIBGCC = $( OBJTREE) /arch/$( ARCH) /lib/libgcc.o
PLATFORM_LIBGCC = $( OBJTREE) /arch/$( ARCH) /lib/lib.a
e l s e
PLATFORM_LIBGCC = -L $( USE_PRIVATE_LIBGCC) -lgcc
e n d i f
e l s e
PLATFORM_LIBGCC := -L $( shell dirname ` $( CC) $( CFLAGS ) -print-libgcc-file-name` ) -lgcc
PLATFORM_LIBGCC := -L $( shell dirname ` $( CC) $( c_flags ) -print-libgcc-file-name` ) -lgcc
e n d i f
PLATFORM_LIBS += $( PLATFORM_LIBGCC)
export PLATFORM_LIBS
@ -701,7 +862,7 @@ u-boot: depend $(SUBDIR_TOOLS) $(OBJS) $(LIBS) u-boot.lds
i f e q ( $( CONFIG_KALLSYMS ) , y )
smap = ` $( call SYSTEM_MAP,u-boot) | \
awk '$$2 ~ /[tTwW]/ {printf $$1 $$3 "\\\\000"}' ` ; \
$( CC) $( CFLAGS ) -DSYSTEM_MAP= " \" $$ {smap}\" " \
$( CC) $( c_flags ) -DSYSTEM_MAP= " \" $$ {smap}\" " \
-c $( srctree) /common/system_map.c -o common/system_map.o
$( GEN_UBOOT) common/system_map.o
e n d i f
@ -709,27 +870,27 @@ endif
$(OBJS) :
@:
$(LIBS) : depend $( SUBDIR_TOOLS )
$( MAKE) $( build) = $( patsubst %/,%,$( dir $@ ) )
$(LIBS) : depend $( SUBDIR_TOOLS ) scripts_basic
$( Q) $( MAKE) $( build) = $( patsubst %/,%,$( dir $@ ) )
$(SUBDIRS) : depend
$( MAKE) $( build) = $@ all
$(SUBDIRS) : depend scripts_basic
$( Q) $( MAKE) $( build) = $@
$(SUBDIR_EXAMPLES-y) : u -boot
u-boot.lds : $( LDSCRIPT ) depend
$( CPP) $( CPPFLAGS ) $( LDPPFLAGS) -ansi -D__ASSEMBLY__ -P - <$< >$@
$( CPP) $( cpp_flags ) $( LDPPFLAGS) -ansi -D__ASSEMBLY__ -P - <$< >$@
nand_spl : $( TIMESTAMP_FILE ) $( VERSION_FILE ) depend
nand_spl : $( TIMESTAMP_FILE ) $( VERSION_FILE ) depend scripts_basic
$( MAKE) $( build) = nand_spl/board/$( BOARDDIR) all
u-boot-nand.bin : nand_spl u -boot .bin
cat nand_spl/u-boot-spl-16k.bin u-boot.bin > u-boot-nand.bin
spl/u-boot-spl.bin : $( SUBDIR_TOOLS ) depend
spl/u-boot-spl.bin : $( SUBDIR_TOOLS ) depend scripts_basic
$( MAKE) obj = spl -f $( srctree) /spl/Makefile all
tpl/u-boot-tpl.bin : $( SUBDIR_TOOLS ) depend
tpl/u-boot-tpl.bin : $( SUBDIR_TOOLS ) depend scripts_basic
$( MAKE) obj = tpl -f $( srctree) /spl/Makefile all CONFIG_TPL_BUILD = y
# Explicitly make _depend in subdirs containing multiple targets to prevent
@ -804,14 +965,14 @@ checkdtc:
include/autoconf.mk.dep : include /config .h include /common .h
@$( XECHO) Generating $@ ; \
: Generate the dependancies ; \
$( CC) -x c -DDO_DEPS_ONLY -M $( CFLAGS) $( CPPFLAGS ) \
$( CC) -x c -DDO_DEPS_ONLY -M $( c_flags ) \
-MQ include/autoconf.mk $( srctree) /include/common.h > $@ || \
rm $@
include/autoconf.mk : include /config .h
@$( XECHO) Generating $@ ; \
: Extract the config macros ; \
$( CPP) $( CFLAGS ) -DDO_DEPS_ONLY -dM $( srctree) /include/common.h > $@ .tmp && \
$( CPP) $( c_flags ) -DDO_DEPS_ONLY -dM $( srctree) /include/common.h > $@ .tmp && \
sed -n -f $( srctree) /tools/scripts/define2mk.sed $@ .tmp > $@ ; \
rm $@ .tmp
@ -819,7 +980,7 @@ include/autoconf.mk: include/config.h
include/tpl-autoconf.mk : include /config .h
@$( XECHO) Generating $@ ; \
: Extract the config macros ; \
$( CPP) $( CFLAGS ) -DCONFIG_TPL_BUILD -DCONFIG_SPL_BUILD\
$( CPP) $( c_flags ) -DCONFIG_TPL_BUILD -DCONFIG_SPL_BUILD\
-DDO_DEPS_ONLY -dM $( srctree) /include/common.h > $@ .tmp && \
sed -n -f $( srctree) /tools/scripts/define2mk.sed $@ .tmp > $@ ; \
rm $@ .tmp
@ -827,7 +988,7 @@ include/tpl-autoconf.mk: include/config.h
include/spl-autoconf.mk : include /config .h
@$( XECHO) Generating $@ ; \
: Extract the config macros ; \
$( CPP) $( CFLAGS ) -DCONFIG_SPL_BUILD -DDO_DEPS_ONLY -dM $( srctree) /include/common.h > $@ .tmp && \
$( CPP) $( c_flags ) -DCONFIG_SPL_BUILD -DDO_DEPS_ONLY -dM $( srctree) /include/common.h > $@ .tmp && \
sed -n -f $( srctree) /tools/scripts/define2mk.sed $@ .tmp > $@ ; \
rm $@ .tmp
@ -838,7 +999,7 @@ include/generated/generic-asm-offsets.h: lib/asm-offsets.s
lib/asm-offsets.s : include /config .h $( srctree ) /lib /asm -offsets .c
@mkdir -p lib
$( CC) -DDO_DEPS_ONLY \
$( CFLAGS ) $( CFLAGS_$( BCURDIR) /$( @F) ) $( CFLAGS_$( BCURDIR) ) \
$( c_flags ) $( CFLAGS_$( BCURDIR) /$( @F) ) $( CFLAGS_$( BCURDIR) ) \
-o $@ $( srctree) /lib/asm-offsets.c -c -S
include/generated/asm-offsets.h : $( CPUDIR ) /$( SOC ) /asm -offsets .s
@ -849,7 +1010,7 @@ $(CPUDIR)/$(SOC)/asm-offsets.s: include/config.h
@mkdir -p $( CPUDIR) /$( SOC)
if [ -f $( srctree) /$( CPUDIR) /$( SOC) /asm-offsets.c ] ; then \
$( CC) -DDO_DEPS_ONLY \
$( CFLAGS ) $( CFLAGS_$( BCURDIR) /$( @F) ) $( CFLAGS_$( BCURDIR) ) \
$( c_flags ) $( CFLAGS_$( BCURDIR) /$( @F) ) $( CFLAGS_$( BCURDIR) ) \
-o $@ $( srctree) /$( CPUDIR) /$( SOC) /asm-offsets.c -c -S; \
else \
touch $@ ; \
@ -900,15 +1061,15 @@ $(TIMESTAMP_FILE):
@cmp -s $@ $@ .tmp && rm -f $@ .tmp || mv -f $@ .tmp $@
easylogo env gdb :
$( MAKE) $( build) = tools/$@ MTD_VERSION = ${ MTD_VERSION }
$( Q) $( MAKE) $( build) = tools/$@ MTD_VERSION = ${ MTD_VERSION }
gdbtools : gdb
xmldocs pdfdocs psdocs htmldocs mandocs : tools /kernel -doc /docproc
$( MAKE) U_BOOT_VERSION = $( U_BOOT_VERSION) $( build) = doc/DocBook $@
$( Q) $( MAKE) U_BOOT_VERSION = $( U_BOOT_VERSION) $( build) = doc/DocBook $@
tools-all : easylogo env gdb $( VERSION_FILE ) $( TIMESTAMP_FILE )
$( MAKE) $( build) = tools HOST_TOOLS_ALL = y
$( Q) $( MAKE) $( build) = tools HOST_TOOLS_ALL = y
.PHONY : CHANGELOG
CHANGELOG :
@ -968,7 +1129,7 @@ clean:
@$( MAKE) -f $( srctree) /doc/DocBook/Makefile cleandocs
@find $( OBJTREE) -type f \
\( -name 'core' -o -name '*.bak' -o -name '*~' -o -name '*.su' \
-o -name '*.o' -o -name '*.a' -o -name '*.exe' \
-o -name '*.o' -o -name '*.a' -o -name '*.exe' -o -name '*.cmd' \
-o -name '*.cfgtmp' \) -print \
| xargs rm -f
Masahiro Yamada
11 years ago
committed by
Tom Rini