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Merge master.kernel.org:/pub/scm/linux/kernel/git/sam/kbuild

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* master.kernel.org:/pub/scm/linux/kernel/git/sam/kbuild: (46 commits)
  kbuild: remove obsoleted scripts/reference_* files
  kbuild: fix make help & make *pkg
  kconfig: fix time ordering of writes to .kconfig.d and include/linux/autoconf.h
  Kconfig: remove the CONFIG_CC_ALIGN_* options
  kbuild: add -fverbose-asm to i386 Makefile
  kbuild: clean-up genksyms
  kbuild: Lindent genksyms.c
  kbuild: fix genksyms build error
  kbuild: in makefile.txt note that Makefile is preferred name for kbuild files
  kbuild: replace PHONY with FORCE
  kbuild: Fix bug in crc symbol generating of kernel and modules
  kbuild: change kbuild to not rely on incorrect GNU make behavior
  kbuild: when warning symbols exported twice now tell user this is the problem
  kbuild: fix make dir/file.xx when asm symlink is missing
  kbuild: in the section mismatch check try harder to find symbols
  kbuild: fix section mismatch check for unwind on IA64
  kbuild: kill false positives from section mismatch warnings for powerpc
  kbuild: kill trailing whitespace in modpost & friends
  kbuild: small update of allnoconfig description
  kbuild: make namespace.pl CROSS_COMPILE happy
  ...

Trivial conflict in arch/ppc/boot/Makefile manually fixed up
This commit is contained in:
Linus Torvalds
2006-03-25 08:48:48 -08:00
parent 315ab19a6d eae0f536f6
commit 2e1ca21d46
52 changed files with 1509 additions and 1268 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
Documentation/DocBook/Makefile
View File

@@ -28,7 +28,7 @@ PS_METHOD = $(prefer-db2x)
###
# The targets that may be used.
.PHONY: xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs
PHONY += xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs
BOOKS := $(addprefix $(obj)/,$(DOCBOOKS))
xmldocs: $(BOOKS)
@@ -211,3 +211,9 @@ clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS))
#man put files in man subdir - traverse down
subdir- := man/
# Declare the contents of the .PHONY variable as phony. We keep that
# information in a variable se we can use it in if_changed and friends.
.PHONY: $(PHONY)

172
Documentation/kbuild/makefiles.txt
View File

@@ -17,6 +17,7 @@ This document describes the Linux kernel Makefiles.
--- 3.8 Command line dependency
--- 3.9 Dependency tracking
--- 3.10 Special Rules
--- 3.11 $(CC) support functions
=== 4 Host Program support
--- 4.1 Simple Host Program
@@ -38,7 +39,6 @@ This document describes the Linux kernel Makefiles.
--- 6.6 Commands useful for building a boot image
--- 6.7 Custom kbuild commands
--- 6.8 Preprocessing linker scripts
--- 6.9 $(CC) support functions
=== 7 Kbuild Variables
=== 8 Makefile language
@@ -106,9 +106,9 @@ This document is aimed towards normal developers and arch developers.
Most Makefiles within the kernel are kbuild Makefiles that use the
kbuild infrastructure. This chapter introduce the syntax used in the
kbuild makefiles.
The preferred name for the kbuild files is 'Kbuild' but 'Makefile' will
continue to be supported. All new developmen is expected to use the
Kbuild filename.
The preferred name for the kbuild files are 'Makefile' but 'Kbuild' can
be used and if both a 'Makefile' and a 'Kbuild' file exists then the 'Kbuild'
file will be used.
Section 3.1 "Goal definitions" is a quick intro, further chapters provide
more details, with real examples.
@@ -385,6 +385,102 @@ more details, with real examples.
to prerequisites are referenced with $(src) (because they are not
generated files).
--- 3.11 $(CC) support functions
The kernel may be build with several different versions of
$(CC), each supporting a unique set of features and options.
kbuild provide basic support to check for valid options for $(CC).
$(CC) is useally the gcc compiler, but other alternatives are
available.
as-option
as-option is used to check if $(CC) when used to compile
assembler (*.S) files supports the given option. An optional
second option may be specified if first option are not supported.
Example:
#arch/sh/Makefile
cflags-y += $(call as-option,-Wa$(comma)-isa=$(isa-y),)
In the above example cflags-y will be assinged the the option
-Wa$(comma)-isa=$(isa-y) if it is supported by $(CC).
The second argument is optional, and if supplied will be used
if first argument is not supported.
cc-option
cc-option is used to check if $(CC) support a given option, and not
supported to use an optional second option.
Example:
#arch/i386/Makefile
cflags-y += $(call cc-option,-march=pentium-mmx,-march=i586)
In the above example cflags-y will be assigned the option
-march=pentium-mmx if supported by $(CC), otherwise -march-i586.
The second argument to cc-option is optional, and if omitted
cflags-y will be assigned no value if first option is not supported.
cc-option-yn
cc-option-yn is used to check if gcc supports a given option
and return 'y' if supported, otherwise 'n'.
Example:
#arch/ppc/Makefile
biarch := $(call cc-option-yn, -m32)
aflags-$(biarch) += -a32
cflags-$(biarch) += -m32
In the above example $(biarch) is set to y if $(CC) supports the -m32
option. When $(biarch) equals to y the expanded variables $(aflags-y)
and $(cflags-y) will be assigned the values -a32 and -m32.
cc-option-align
gcc version >= 3.0 shifted type of options used to speify
alignment of functions, loops etc. $(cc-option-align) whrn used
as prefix to the align options will select the right prefix:
gcc < 3.00
cc-option-align = -malign
gcc >= 3.00
cc-option-align = -falign
Example:
CFLAGS += $(cc-option-align)-functions=4
In the above example the option -falign-functions=4 is used for
gcc >= 3.00. For gcc < 3.00 -malign-functions=4 is used.
cc-version
cc-version return a numerical version of the $(CC) compiler version.
The format is <major><minor> where both are two digits. So for example
gcc 3.41 would return 0341.
cc-version is useful when a specific $(CC) version is faulty in one
area, for example the -mregparm=3 were broken in some gcc version
even though the option was accepted by gcc.
Example:
#arch/i386/Makefile
cflags-y += $(shell \
if [ $(call cc-version) -ge 0300 ] ; then \
echo "-mregparm=3"; fi ;)
In the above example -mregparm=3 is only used for gcc version greater
than or equal to gcc 3.0.
cc-ifversion
cc-ifversion test the version of $(CC) and equals last argument if
version expression is true.
Example:
#fs/reiserfs/Makefile
EXTRA_CFLAGS := $(call cc-ifversion, -lt, 0402, -O1)
In this example EXTRA_CFLAGS will be assigned the value -O1 if the
$(CC) version is less than 4.2.
cc-ifversion takes all the shell operators:
-eq, -ne, -lt, -le, -gt, and -ge
The third parameter may be a text as in this example, but it may also
be an expanded variable or a macro.
=== 4 Host Program support
@@ -973,74 +1069,6 @@ When kbuild executes the following steps are followed (roughly):
architecture specific files.
--- 6.9 $(CC) support functions
The kernel may be build with several different versions of
$(CC), each supporting a unique set of features and options.
kbuild provide basic support to check for valid options for $(CC).
$(CC) is useally the gcc compiler, but other alternatives are
available.
cc-option
cc-option is used to check if $(CC) support a given option, and not
supported to use an optional second option.
Example:
#arch/i386/Makefile
cflags-y += $(call cc-option,-march=pentium-mmx,-march=i586)
In the above example cflags-y will be assigned the option
-march=pentium-mmx if supported by $(CC), otherwise -march-i586.
The second argument to cc-option is optional, and if omitted
cflags-y will be assigned no value if first option is not supported.
cc-option-yn
cc-option-yn is used to check if gcc supports a given option
and return 'y' if supported, otherwise 'n'.
Example:
#arch/ppc/Makefile
biarch := $(call cc-option-yn, -m32)
aflags-$(biarch) += -a32
cflags-$(biarch) += -m32
In the above example $(biarch) is set to y if $(CC) supports the -m32
option. When $(biarch) equals to y the expanded variables $(aflags-y)
and $(cflags-y) will be assigned the values -a32 and -m32.
cc-option-align
gcc version >= 3.0 shifted type of options used to speify
alignment of functions, loops etc. $(cc-option-align) whrn used
as prefix to the align options will select the right prefix:
gcc < 3.00
cc-option-align = -malign
gcc >= 3.00
cc-option-align = -falign
Example:
CFLAGS += $(cc-option-align)-functions=4
In the above example the option -falign-functions=4 is used for
gcc >= 3.00. For gcc < 3.00 -malign-functions=4 is used.
cc-version
cc-version return a numerical version of the $(CC) compiler version.
The format is <major><minor> where both are two digits. So for example
gcc 3.41 would return 0341.
cc-version is useful when a specific $(CC) version is faulty in one
area, for example the -mregparm=3 were broken in some gcc version
even though the option was accepted by gcc.
Example:
#arch/i386/Makefile
cflags-y += $(shell \
if [ $(call cc-version) -ge 0300 ] ; then \
echo "-mregparm=3"; fi ;)
In the above example -mregparm=3 is only used for gcc version greater
than or equal to gcc 3.0.
=== 7 Kbuild Variables
The top Makefile exports the following variables:

98
Documentation/kbuild/modules.txt
View File

@@ -13,6 +13,7 @@ In this document you will find information about:
--- 2.2 Available targets
--- 2.3 Available options
--- 2.4 Preparing the kernel tree for module build
--- 2.5 Building separate files for a module
=== 3. Example commands
=== 4. Creating a kbuild file for an external module
=== 5. Include files
@@ -22,7 +23,10 @@ In this document you will find information about:
=== 6. Module installation
--- 6.1 INSTALL_MOD_PATH
--- 6.2 INSTALL_MOD_DIR
=== 7. Module versioning
=== 7. Module versioning & Module.symvers
--- 7.1 Symbols fron the kernel (vmlinux + modules)
--- 7.2 Symbols and external modules
--- 7.3 Symbols from another external module
=== 8. Tips & Tricks
--- 8.1 Testing for CONFIG_FOO_BAR
@@ -88,7 +92,8 @@ when building an external module.
make -C $KDIR M=$PWD modules_install
Install the external module(s).
Installation default is in /lib/modules/<kernel-version>/extra,
but may be prefixed with INSTALL_MOD_PATH - see separate chapter.
but may be prefixed with INSTALL_MOD_PATH - see separate
chapter.
make -C $KDIR M=$PWD clean
Remove all generated files for the module - the kernel
@@ -131,6 +136,16 @@ when building an external module.
Therefore a full kernel build needs to be executed to make
module versioning work.
--- 2.5 Building separate files for a module
It is possible to build single files which is part of a module.
This works equal for the kernel, a module and even for external
modules.
Examples (module foo.ko, consist of bar.o, baz.o):
make -C $KDIR M=`pwd` bar.lst
make -C $KDIR M=`pwd` bar.o
make -C $KDIR M=`pwd` foo.ko
make -C $KDIR M=`pwd` /
=== 3. Example commands
@@ -422,7 +437,7 @@ External modules are installed in the directory:
=> Install dir: /lib/modules/$(KERNELRELEASE)/gandalf
=== 7. Module versioning
=== 7. Module versioning & Module.symvers
Module versioning is enabled by the CONFIG_MODVERSIONS tag.
@@ -432,11 +447,80 @@ when a module is loaded/used then the CRC values contained in the kernel are
compared with similar values in the module. If they are not equal then the
kernel refuses to load the module.
During a kernel build a file named Module.symvers will be generated. This
file includes the symbol version of all symbols within the kernel. If the
Module.symvers file is saved from the last full kernel compile one does not
have to do a full kernel compile to build a module version's compatible module.
Module.symvers contains a list of all exported symbols from a kernel build.
--- 7.1 Symbols fron the kernel (vmlinux + modules)
During a kernel build a file named Module.symvers will be generated.
Module.symvers contains all exported symbols from the kernel and
compiled modules. For each symbols the corresponding CRC value
is stored too.
The syntax of the Module.symvers file is:
<CRC> <Symbol> <module>
Sample:
0x2d036834 scsi_remove_host drivers/scsi/scsi_mod
For a kernel build without CONFIG_MODVERSIONING enabled the crc
would read: 0x00000000
Module.symvers serve two purposes.
1) It list all exported symbols both from vmlinux and all modules
2) It list CRC if CONFIG_MODVERSION is enabled
--- 7.2 Symbols and external modules
When building an external module the build system needs access to
the symbols from the kernel to check if all external symbols are
defined. This is done in the MODPOST step and to obtain all
symbols modpost reads Module.symvers from the kernel.
If a Module.symvers file is present in the directory where
the external module is being build this file will be read too.
During the MODPOST step a new Module.symvers file will be written
containing all exported symbols that was not defined in the kernel.
--- 7.3 Symbols from another external module
Sometimes one external module uses exported symbols from another
external module. Kbuild needs to have full knowledge on all symbols
to avoid spitting out warnings about undefined symbols.
Two solutions exist to let kbuild know all symbols of more than
one external module.
The method with a top-level kbuild file is recommended but may be
impractical in certain situations.
Use a top-level Kbuild file
If you have two modules: 'foo', 'bar' and 'foo' needs symbols
from 'bar' then one can use a common top-level kbuild file so
both modules are compiled in same build.
Consider following directory layout:
./foo/ <= contains the foo module
./bar/ <= contains the bar module
The top-level Kbuild file would then look like:
#./Kbuild: (this file may also be named Makefile)
obj-y := foo/ bar/
Executing:
make -C $KDIR M=`pwd`
will then do the expected and compile both modules with full
knowledge on symbols from both modules.
Use an extra Module.symvers file
When an external module is build a Module.symvers file is
generated containing all exported symbols which are not
defined in the kernel.
To get access to symbols from module 'bar' one can copy the
Module.symvers file from the compilation of the 'bar' module
to the directory where the 'foo' module is build.
During the module build kbuild will read the Module.symvers
file in the directory of the external module and when the
build is finished a new Module.symvers file is created
containing the sum of all symbols defined and not part of the
kernel.
=== 8. Tips & Tricks
--- 8.1 Testing for CONFIG_FOO_BAR

4
Documentation/smart-config.txt
View File

@@ -56,10 +56,6 @@ Here is the solution:
writing one file per option. It updates only the files for options
that have changed.
mkdep.c no longer generates warning messages for missing or unneeded
<linux/config.h> lines. The new top-level target 'make checkconfig'
checks for these problems.
Flag Dependencies
Martin Von Loewis contributed another feature to this patch:

197
Makefile
View File

@@ -95,7 +95,7 @@ ifdef O
endif
# That's our default target when none is given on the command line
.PHONY: _all
PHONY := _all
_all:
ifneq ($(KBUILD_OUTPUT),)
@@ -106,7 +106,7 @@ KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
$(if $(KBUILD_OUTPUT),, \
$(error output directory "$(saved-output)" does not exist))
.PHONY: $(MAKECMDGOALS)
PHONY += $(MAKECMDGOALS)
$(filter-out _all,$(MAKECMDGOALS)) _all:
$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
@@ -123,7 +123,7 @@ ifeq ($(skip-makefile),)
# If building an external module we do not care about the all: rule
# but instead _all depend on modules
.PHONY: all
PHONY += all
ifeq ($(KBUILD_EXTMOD),)
_all: all
else
@@ -137,7 +137,7 @@ objtree := $(CURDIR)
src := $(srctree)
obj := $(objtree)
VPATH := $(srctree)
VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
export srctree objtree VPATH TOPDIR
@@ -151,7 +151,7 @@ export srctree objtree VPATH TOPDIR
SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
-e s/arm.*/arm/ -e s/sa110/arm/ \
-e s/s390x/s390/ -e s/parisc64/parisc/ \
-e s/ppc.*/powerpc/ )
-e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
# Cross compiling and selecting different set of gcc/bin-utils
# ---------------------------------------------------------------------------
@@ -258,38 +258,6 @@ endif
export quiet Q KBUILD_VERBOSE
######
# cc support functions to be used (only) in arch/$(ARCH)/Makefile
# See documentation in Documentation/kbuild/makefiles.txt
# as-option
# Usage: cflags-y += $(call as-option, -Wa$(comma)-isa=foo,)
as-option = $(shell if $(CC) $(CFLAGS) $(1) -Wa,-Z -c -o /dev/null \
-xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \
else echo "$(2)"; fi ;)
# cc-option
# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
> /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
# cc-option-yn
# Usage: flag := $(call cc-option-yn, -march=winchip-c6)
cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
> /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
# cc-option-align
# Prefix align with either -falign or -malign
cc-option-align = $(subst -functions=0,,\
$(call cc-option,-falign-functions=0,-malign-functions=0))
# cc-version
# Usage gcc-ver := $(call cc-version $(CC))
cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
$(if $(1), $(1), $(CC)))
# Look for make include files relative to root of kernel src
MAKEFLAGS += --include-dir=$(srctree)
@@ -369,14 +337,14 @@ export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exc
# Rules shared between *config targets and build targets
# Basic helpers built in scripts/
.PHONY: scripts_basic
PHONY += scripts_basic
scripts_basic:
$(Q)$(MAKE) $(build)=scripts/basic
# To avoid any implicit rule to kick in, define an empty command.
scripts/basic/%: scripts_basic ;
.PHONY: outputmakefile
PHONY += outputmakefile
# outputmakefile generate a Makefile to be placed in output directory, if
# using a seperate output directory. This allows convinient use
# of make in output directory
@@ -452,7 +420,7 @@ ifeq ($(KBUILD_EXTMOD),)
# Additional helpers built in scripts/
# Carefully list dependencies so we do not try to build scripts twice
# in parrallel
.PHONY: scripts
PHONY += scripts
scripts: scripts_basic include/config/MARKER
$(Q)$(MAKE) $(build)=$(@)
@@ -504,13 +472,6 @@ else
CFLAGS += -O2
endif
#Add align options if CONFIG_CC_* is not equal to 0
add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
ifdef CONFIG_FRAME_POINTER
CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
else
@@ -756,7 +717,7 @@ $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
# make menuconfig etc.
# Error messages still appears in the original language
.PHONY: $(vmlinux-dirs)
PHONY += $(vmlinux-dirs)
$(vmlinux-dirs): prepare scripts
$(Q)$(MAKE) $(build)=$@
@@ -809,10 +770,10 @@ kernelrelease = $(KERNELVERSION)$(localver-full)
# version.h and scripts_basic is processed / created.
# Listed in dependency order
.PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
# prepare-all is deprecated, use prepare as valid replacement
.PHONY: prepare-all
PHONY += prepare-all
# prepare3 is used to check if we are building in a separate output directory,
# and if so do:
@@ -853,27 +814,6 @@ prepare prepare-all: prepare0
export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
# Single targets
# ---------------------------------------------------------------------------
%.s: %.c scripts FORCE
$(Q)$(MAKE) $(build)=$(@D) $@
%.i: %.c scripts FORCE
$(Q)$(MAKE) $(build)=$(@D) $@
%.o: %.c scripts FORCE
$(Q)$(MAKE) $(build)=$(@D) $@
%.ko: scripts FORCE
$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
%/: scripts prepare FORCE
$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
%.lst: %.c scripts FORCE
$(Q)$(MAKE) $(build)=$(@D) $@
%.s: %.S scripts FORCE
$(Q)$(MAKE) $(build)=$(@D) $@
%.o: %.S scripts FORCE
$(Q)$(MAKE) $(build)=$(@D) $@
# FIXME: The asm symlink changes when $(ARCH) changes. That's
# hard to detect, but I suppose "make mrproper" is a good idea
# before switching between archs anyway.
@@ -914,7 +854,7 @@ include/linux/version.h: $(srctree)/Makefile .config .kernelrelease FORCE
# ---------------------------------------------------------------------------
.PHONY: depend dep
PHONY += depend dep
depend dep:
@echo '*** Warning: make $@ is unnecessary now.'
@@ -929,21 +869,21 @@ all: modules
# Build modules
.PHONY: modules
PHONY += modules
modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
@echo ' Building modules, stage 2.';
$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
# Target to prepare building external modules
.PHONY: modules_prepare
PHONY += modules_prepare
modules_prepare: prepare scripts
# Target to install modules
.PHONY: modules_install
PHONY += modules_install
modules_install: _modinst_ _modinst_post
.PHONY: _modinst_
PHONY += _modinst_
_modinst_:
@if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
echo "Warning: you may need to install module-init-tools"; \
@@ -970,7 +910,7 @@ depmod_opts :=
else
depmod_opts := -b $(INSTALL_MOD_PATH) -r
endif
.PHONY: _modinst_post
PHONY += _modinst_post
_modinst_post: _modinst_
if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
@@ -1013,7 +953,7 @@ clean: rm-dirs := $(CLEAN_DIRS)
clean: rm-files := $(CLEAN_FILES)
clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
.PHONY: $(clean-dirs) clean archclean
PHONY += $(clean-dirs) clean archclean
$(clean-dirs):
$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
@@ -1031,7 +971,7 @@ mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
.PHONY: $(mrproper-dirs) mrproper archmrproper
PHONY += $(mrproper-dirs) mrproper archmrproper
$(mrproper-dirs):
$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
@@ -1041,7 +981,7 @@ mrproper: clean archmrproper $(mrproper-dirs)
# distclean
#
.PHONY: distclean
PHONY += distclean
distclean: mrproper
@find $(srctree) $(RCS_FIND_IGNORE) \
@@ -1057,12 +997,10 @@ distclean: mrproper
# rpm target kept for backward compatibility
package-dir := $(srctree)/scripts/package
.PHONY: %-pkg rpm
%pkg: FORCE
$(Q)$(MAKE) -f $(package-dir)/Makefile $@
$(Q)$(MAKE) $(build)=$(package-dir) $@
rpm: FORCE
$(Q)$(MAKE) -f $(package-dir)/Makefile $@
$(Q)$(MAKE) $(build)=$(package-dir) $@
# Brief documentation of the typical targets used
@@ -1094,13 +1032,11 @@ help:
@echo ' kernelversion - Output the version stored in Makefile'
@echo ''
@echo 'Static analysers'
@echo ' buildcheck - List dangling references to vmlinux discarded sections'
@echo ' and init sections from non-init sections'
@echo ' checkstack - Generate a list of stack hogs'
@echo ' namespacecheck - Name space analysis on compiled kernel'
@echo ''
@echo 'Kernel packaging:'
@$(MAKE) -f $(package-dir)/Makefile help
@$(MAKE) $(build)=$(package-dir) help
@echo ''
@echo 'Documentation targets:'
@$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
@@ -1149,11 +1085,12 @@ else # KBUILD_EXTMOD
# We are always building modules
KBUILD_MODULES := 1
.PHONY: crmodverdir
PHONY += crmodverdir
crmodverdir:
$(Q)rm -rf $(MODVERDIR)
$(Q)mkdir -p $(MODVERDIR)
.PHONY: $(objtree)/Module.symvers
PHONY += $(objtree)/Module.symvers
$(objtree)/Module.symvers:
@test -e $(objtree)/Module.symvers || ( \
echo; \
@@ -1162,7 +1099,7 @@ $(objtree)/Module.symvers:
echo )
module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
.PHONY: $(module-dirs) modules
PHONY += $(module-dirs) modules
$(module-dirs): crmodverdir $(objtree)/Module.symvers
$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
@@ -1170,13 +1107,32 @@ modules: $(module-dirs)
@echo ' Building modules, stage 2.';
$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
.PHONY: modules_install
modules_install:
PHONY += modules_install
modules_install: _emodinst_ _emodinst_post
install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
PHONY += _emodinst_
_emodinst_:
$(Q)rm -rf $(MODLIB)/$(install-dir)
$(Q)mkdir -p $(MODLIB)/$(install-dir)
$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
# Run depmod only is we have System.map and depmod is executable
quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
$(DEPMOD) -ae -F System.map \
$(if $(strip $(INSTALL_MOD_PATH)), \
-b $(INSTALL_MOD_PATH) -r) \
$(KERNELRELEASE); \
fi
PHONY += _emodinst_post
_emodinst_post: _emodinst_
$(call cmd,depmod)
clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
.PHONY: $(clean-dirs) clean
PHONY += $(clean-dirs) clean
$(clean-dirs):
$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
@@ -1196,6 +1152,11 @@ help:
@echo ' modules_install - install the module'
@echo ' clean - remove generated files in module directory only'
@echo ''
# Dummies...
PHONY += prepare scripts
prepare: ;
scripts: ;
endif # KBUILD_EXTMOD
# Generate tags for editors
@@ -1296,17 +1257,13 @@ versioncheck:
-name '*.[hcS]' -type f -print | sort \
| xargs $(PERL) -w scripts/checkversion.pl
buildcheck:
$(PERL) $(srctree)/scripts/reference_discarded.pl
$(PERL) $(srctree)/scripts/reference_init.pl
namespacecheck:
$(PERL) $(srctree)/scripts/namespace.pl
endif #ifeq ($(config-targets),1)
endif #ifeq ($(mixed-targets),1)
.PHONY: checkstack
PHONY += checkstack
checkstack:
$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
$(PERL) $(src)/scripts/checkstack.pl $(ARCH)
@@ -1317,6 +1274,44 @@ kernelrelease:
kernelversion:
@echo $(KERNELVERSION)
# Single targets
# ---------------------------------------------------------------------------
# The directory part is taken from first prerequisite, so this
# works even with external modules
%.s: %.c prepare scripts FORCE
$(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
%.i: %.c prepare scripts FORCE
$(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
%.o: %.c prepare scripts FORCE
$(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
%.lst: %.c prepare scripts FORCE
$(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
%.s: %.S prepare scripts FORCE
$(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
%.o: %.S prepare scripts FORCE
$(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
# For external modules we shall include any directory of the target,
# but usual case there is no directory part.
# make M=`pwd` module.o => $(dir $@)=./
# make M=`pwd` foo/module.o => $(dir $@)=foo/
# make M=`pwd` / => $(dir $@)=/
ifeq ($(KBUILD_EXTMOD),)
target-dir = $(@D)
else
zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
target-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
endif
/ %/: scripts prepare FORCE
$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
$(build)=$(target-dir)
%.ko: scripts FORCE
$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
$(build)=$(target-dir) $(@:.ko=.o)
$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
# FIXME Should go into a make.lib or something
# ===========================================================================
@@ -1351,4 +1346,10 @@ clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
endif # skip-makefile
PHONY += FORCE
FORCE:
# Declare the contents of the .PHONY variable as phony. We keep that
# information in a variable se we can use it in if_changed and friends.
.PHONY: $(PHONY)

5
arch/arm/Makefile
View File

@@ -1,6 +1,9 @@
#
# arch/arm/Makefile
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
# 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.
@@ -177,7 +180,7 @@ endif
archprepare: maketools
.PHONY: maketools FORCE
PHONY += maketools FORCE
maketools: include/linux/version.h include/asm-arm/.arch FORCE
$(Q)$(MAKE) $(build)=arch/arm/tools include/asm-arm/mach-types.h

5
arch/arm/boot/Makefile
View File

@@ -1,6 +1,9 @@
#
# arch/arm/boot/Makefile
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
# 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.
@@ -73,7 +76,7 @@ $(obj)/bootpImage: $(obj)/bootp/bootp FORCE
$(call if_changed,objcopy)
@echo ' Kernel: $@ is ready'
.PHONY: initrd FORCE
PHONY += initrd FORCE
initrd:
@test "$(INITRD_PHYS)" != "" || \
(echo This machine does not support INITRD; exit -1)

5
arch/arm/boot/bootp/Makefile
View File

@@ -1,6 +1,9 @@
#
# linux/arch/arm/boot/bootp/Makefile
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
LDFLAGS_bootp :=-p --no-undefined -X \
--defsym initrd_phys=$(INITRD_PHYS) \
@@ -21,4 +24,4 @@ $(obj)/kernel.o: arch/arm/boot/zImage FORCE
$(obj)/initrd.o: $(INITRD) FORCE
.PHONY: $(INITRD) FORCE
PHONY += $(INITRD) FORCE

7
arch/arm26/Makefile
View File

@@ -1,6 +1,9 @@
#
# arch/arm26/Makefile
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
# 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.
@@ -49,9 +52,9 @@ all: zImage
boot := arch/arm26/boot
.PHONY: maketools FORCE
PHONY += maketools FORCE
maketools: FORCE
# Convert bzImage to zImage
bzImage: vmlinux

5
arch/arm26/boot/Makefile
View File

@@ -1,6 +1,9 @@
#
# arch/arm26/boot/Makefile
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
# 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.
@@ -60,7 +63,7 @@ $(obj)/xipImage: vmlinux FORCE
@echo ' Kernel: $@ is ready'
endif
.PHONY: initrd
PHONY += initrd
initrd:
@test "$(INITRD_PHYS)" != "" || \
(echo This machine does not support INITRD; exit -1)

4
arch/i386/Makefile
View File

@@ -99,8 +99,8 @@ AFLAGS += $(mflags-y)
boot := arch/i386/boot
.PHONY: zImage bzImage compressed zlilo bzlilo \
zdisk bzdisk fdimage fdimage144 fdimage288 install
PHONY += zImage bzImage compressed zlilo bzlilo \
zdisk bzdisk fdimage fdimage144 fdimage288 install
all: bzImage

3
arch/i386/kernel/vmlinux.lds.S
View File

@@ -7,6 +7,7 @@
#include <asm-generic/vmlinux.lds.h>
#include <asm/thread_info.h>
#include <asm/page.h>
#include <asm/cache.h>
OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
OUTPUT_ARCH(i386)
@@ -135,7 +136,7 @@ SECTIONS
__initramfs_start = .;
.init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { *(.init.ramfs) }
__initramfs_end = .;
. = ALIGN(32);
. = ALIGN(L1_CACHE_BYTES);
__per_cpu_start = .;
.data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { *(.data.percpu) }
__per_cpu_end = .;

5
arch/ia64/Makefile
View File

@@ -1,6 +1,9 @@
#
# ia64/Makefile
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
# 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.
@@ -62,7 +65,7 @@ drivers-$(CONFIG_OPROFILE) += arch/ia64/oprofile/
boot := arch/ia64/hp/sim/boot
.PHONY: boot compressed check
PHONY += boot compressed check
all: compressed unwcheck

5
arch/m32r/Makefile
View File

@@ -1,6 +1,9 @@
#
# m32r/Makefile
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
LDFLAGS :=
OBJCOPYFLAGS := -O binary -R .note -R .comment -S
@@ -39,7 +42,7 @@ drivers-$(CONFIG_OPROFILE) += arch/m32r/oprofile/
boot := arch/m32r/boot
.PHONY: zImage
PHONY += zImage
all: zImage

2
arch/powerpc/Makefile
View File

@@ -150,7 +150,7 @@ CPPFLAGS_vmlinux.lds := -Upowerpc
BOOT_TARGETS = zImage zImage.initrd znetboot znetboot.initrd vmlinux.sm uImage vmlinux.bin
.PHONY: $(BOOT_TARGETS)
PHONY += $(BOOT_TARGETS)
boot := arch/$(ARCH)/boot

2
arch/ppc/Makefile
View File

@@ -82,7 +82,7 @@ drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
BOOT_TARGETS = zImage zImage.initrd znetboot znetboot.initrd vmlinux.sm
.PHONY: $(BOOT_TARGETS)
PHONY += $(BOOT_TARGETS)
all: uImage zImage

8
arch/ppc/boot/Makefile
View File

@@ -1,3 +1,9 @@
#
# arch/ppc/boot/Makefile
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
# 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.
@@ -22,7 +28,7 @@ subdir- += simple openfirmware
hostprogs-y := $(addprefix utils/, addnote mknote hack-coff mkprep mkbugboot mktree)
.PHONY: $(BOOT_TARGETS) $(bootdir-y)
PHONY += $(BOOT_TARGETS) $(bootdir-y)
$(BOOT_TARGETS): $(bootdir-y)

7
arch/ppc/boot/openfirmware/Makefile
View File

@@ -1,5 +1,8 @@
# Makefile for making bootable images on various OpenFirmware machines.
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
# Paul Mackerras January 1997
# XCOFF bootable images for PowerMacs
# Geert Uytterhoeven September 1997
@@ -86,7 +89,7 @@ $(images)/zImage.chrp-rs6k $(images)/zImage.initrd.chrp-rs6k: \
# The targets used on the make command-line
.PHONY: zImage zImage.initrd
PHONY += zImage zImage.initrd
zImage: $(images)/zImage.chrp \
$(images)/zImage.chrp-rs6k
@echo ' kernel: $@ is ready ($<)'
@@ -96,7 +99,7 @@ zImage.initrd: $(images)/zImage.initrd.chrp \
TFTPIMAGE := /tftpboot/zImage
.PHONY: znetboot znetboot.initrd
PHONY += znetboot znetboot.initrd
znetboot: $(images)/zImage.chrp
cp $(images)/zImage.chrp $(TFTPIMAGE).chrp$(END)
@echo ' kernel: $@ is ready ($<)'

2
arch/sh/Makefile
View File

@@ -172,7 +172,7 @@ include/asm-sh/.mach: $(wildcard include/config/sh/*.h) include/config/MARKER
archprepare: maketools include/asm-sh/.cpu include/asm-sh/.mach
.PHONY: maketools FORCE
PHONY += maketools FORCE
maketools: include/linux/version.h FORCE
$(Q)$(MAKE) $(build)=arch/sh/tools include/asm-sh/machtypes.h

7
arch/um/Makefile
View File

@@ -1,4 +1,7 @@
#
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
# Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
# Licensed under the GPL
#
@@ -88,7 +91,7 @@ CONFIG_KERNEL_HALF_GIGS ?= 0
SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000)
.PHONY: linux
PHONY += linux
all: linux

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