2ab23c95a0
In Uml, many definitions are borrowed from underlying subarch headers (with #include <asm/arch/stuff.h>). And it has become annoying to keep switching tag files all time, so by default index the underlying subarch headers too. Btw, it adds negligible space to the tags file (less than 1M surely, IIRC it was around 500k over 40M). Finally, preserve the ALLSOURCE_ARCHS command line option (I hope) - if it is set, it is used for headers too as before. But check my construct please, I didn't test this. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: Jeff Dike <jdike@addtoit.com> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1328 lines
43 KiB
Makefile
1328 lines
43 KiB
Makefile
VERSION = 2
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PATCHLEVEL = 6
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SUBLEVEL = 15
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EXTRAVERSION =-rc1
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NAME=Affluent Albatross
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# *DOCUMENTATION*
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# To see a list of typical targets execute "make help"
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# More info can be located in ./README
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# Comments in this file are targeted only to the developer, do not
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# expect to learn how to build the kernel reading this file.
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# Do not print "Entering directory ..."
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MAKEFLAGS += --no-print-directory
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# We are using a recursive build, so we need to do a little thinking
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# to get the ordering right.
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#
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# Most importantly: sub-Makefiles should only ever modify files in
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# their own directory. If in some directory we have a dependency on
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# a file in another dir (which doesn't happen often, but it's often
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# unavoidable when linking the built-in.o targets which finally
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# turn into vmlinux), we will call a sub make in that other dir, and
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# after that we are sure that everything which is in that other dir
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# is now up to date.
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#
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# The only cases where we need to modify files which have global
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# effects are thus separated out and done before the recursive
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# descending is started. They are now explicitly listed as the
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# prepare rule.
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# To put more focus on warnings, be less verbose as default
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# Use 'make V=1' to see the full commands
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ifdef V
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ifeq ("$(origin V)", "command line")
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KBUILD_VERBOSE = $(V)
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endif
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endif
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ifndef KBUILD_VERBOSE
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KBUILD_VERBOSE = 0
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endif
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# Call sparse as part of compilation of C files
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# Use 'make C=1' to enable sparse checking
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ifdef C
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ifeq ("$(origin C)", "command line")
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KBUILD_CHECKSRC = $(C)
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endif
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endif
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ifndef KBUILD_CHECKSRC
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KBUILD_CHECKSRC = 0
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endif
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# Use make M=dir to specify directory of external module to build
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# Old syntax make ... SUBDIRS=$PWD is still supported
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# Setting the environment variable KBUILD_EXTMOD take precedence
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ifdef SUBDIRS
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KBUILD_EXTMOD ?= $(SUBDIRS)
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endif
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ifdef M
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ifeq ("$(origin M)", "command line")
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KBUILD_EXTMOD := $(M)
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endif
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endif
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# kbuild supports saving output files in a separate directory.
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# To locate output files in a separate directory two syntaxes are supported.
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# In both cases the working directory must be the root of the kernel src.
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# 1) O=
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# Use "make O=dir/to/store/output/files/"
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#
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# 2) Set KBUILD_OUTPUT
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# Set the environment variable KBUILD_OUTPUT to point to the directory
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# where the output files shall be placed.
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# export KBUILD_OUTPUT=dir/to/store/output/files/
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# make
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#
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# The O= assignment takes precedence over the KBUILD_OUTPUT environment
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# variable.
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# KBUILD_SRC is set on invocation of make in OBJ directory
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# KBUILD_SRC is not intended to be used by the regular user (for now)
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ifeq ($(KBUILD_SRC),)
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# OK, Make called in directory where kernel src resides
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# Do we want to locate output files in a separate directory?
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ifdef O
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ifeq ("$(origin O)", "command line")
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KBUILD_OUTPUT := $(O)
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endif
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endif
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# That's our default target when none is given on the command line
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.PHONY: _all
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_all:
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ifneq ($(KBUILD_OUTPUT),)
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# Invoke a second make in the output directory, passing relevant variables
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# check that the output directory actually exists
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saved-output := $(KBUILD_OUTPUT)
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KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
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$(if $(KBUILD_OUTPUT),, \
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$(error output directory "$(saved-output)" does not exist))
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.PHONY: $(MAKECMDGOALS)
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$(filter-out _all,$(MAKECMDGOALS)) _all:
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$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
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KBUILD_SRC=$(CURDIR) \
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KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
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# Leave processing to above invocation of make
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skip-makefile := 1
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endif # ifneq ($(KBUILD_OUTPUT),)
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endif # ifeq ($(KBUILD_SRC),)
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# We process the rest of the Makefile if this is the final invocation of make
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ifeq ($(skip-makefile),)
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# If building an external module we do not care about the all: rule
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# but instead _all depend on modules
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.PHONY: all
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ifeq ($(KBUILD_EXTMOD),)
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_all: all
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else
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_all: modules
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endif
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srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
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TOPDIR := $(srctree)
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# FIXME - TOPDIR is obsolete, use srctree/objtree
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objtree := $(CURDIR)
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src := $(srctree)
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obj := $(objtree)
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VPATH := $(srctree)
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export srctree objtree VPATH TOPDIR
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nullstring :=
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space := $(nullstring) # end of line
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# Take the contents of any files called localversion* and the config
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# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be
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# careful not to include files twice if building in the source
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# directory. LOCALVERSION from the command line override all of this
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localver := $(objtree)/localversion* $(srctree)/localversion*
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localver := $(sort $(wildcard $(localver)))
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# skip backup files (containing '~')
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localver := $(foreach f, $(localver), $(if $(findstring ~, $(f)),,$(f)))
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LOCALVERSION = $(subst $(space),, \
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$(shell cat /dev/null $(localver)) \
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$(patsubst "%",%,$(CONFIG_LOCALVERSION)))
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KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION)
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# SUBARCH tells the usermode build what the underlying arch is. That is set
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# first, and if a usermode build is happening, the "ARCH=um" on the command
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# line overrides the setting of ARCH below. If a native build is happening,
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# then ARCH is assigned, getting whatever value it gets normally, and
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# SUBARCH is subsequently ignored.
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SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
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-e s/arm.*/arm/ -e s/sa110/arm/ \
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-e s/s390x/s390/ -e s/parisc64/parisc/ \
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-e s/ppc64/powerpc/ )
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# Cross compiling and selecting different set of gcc/bin-utils
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# ---------------------------------------------------------------------------
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#
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# When performing cross compilation for other architectures ARCH shall be set
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# to the target architecture. (See arch/* for the possibilities).
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# ARCH can be set during invocation of make:
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# make ARCH=ia64
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# Another way is to have ARCH set in the environment.
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# The default ARCH is the host where make is executed.
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# CROSS_COMPILE specify the prefix used for all executables used
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# during compilation. Only gcc and related bin-utils executables
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# are prefixed with $(CROSS_COMPILE).
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# CROSS_COMPILE can be set on the command line
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# make CROSS_COMPILE=ia64-linux-
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# Alternatively CROSS_COMPILE can be set in the environment.
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# Default value for CROSS_COMPILE is not to prefix executables
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# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
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ARCH ?= $(SUBARCH)
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CROSS_COMPILE ?=
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# Architecture as present in compile.h
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UTS_MACHINE := $(ARCH)
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# SHELL used by kbuild
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CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
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else if [ -x /bin/bash ]; then echo /bin/bash; \
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else echo sh; fi ; fi)
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HOSTCC = gcc
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HOSTCXX = g++
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HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
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HOSTCXXFLAGS = -O2
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# Decide whether to build built-in, modular, or both.
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# Normally, just do built-in.
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KBUILD_MODULES :=
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KBUILD_BUILTIN := 1
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# If we have only "make modules", don't compile built-in objects.
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# When we're building modules with modversions, we need to consider
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# the built-in objects during the descend as well, in order to
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# make sure the checksums are uptodate before we record them.
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ifeq ($(MAKECMDGOALS),modules)
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KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
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endif
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# If we have "make <whatever> modules", compile modules
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# in addition to whatever we do anyway.
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# Just "make" or "make all" shall build modules as well
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ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
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KBUILD_MODULES := 1
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endif
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ifeq ($(MAKECMDGOALS),)
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KBUILD_MODULES := 1
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endif
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export KBUILD_MODULES KBUILD_BUILTIN
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export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
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# Beautify output
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# ---------------------------------------------------------------------------
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#
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# Normally, we echo the whole command before executing it. By making
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# that echo $($(quiet)$(cmd)), we now have the possibility to set
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# $(quiet) to choose other forms of output instead, e.g.
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#
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# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
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# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
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#
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# If $(quiet) is empty, the whole command will be printed.
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# If it is set to "quiet_", only the short version will be printed.
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# If it is set to "silent_", nothing wil be printed at all, since
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# the variable $(silent_cmd_cc_o_c) doesn't exist.
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#
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# A simple variant is to prefix commands with $(Q) - that's usefull
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# for commands that shall be hidden in non-verbose mode.
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#
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# $(Q)ln $@ :<
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#
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# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
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# If KBUILD_VERBOSE equals 1 then the above command is displayed.
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ifeq ($(KBUILD_VERBOSE),1)
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quiet =
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Q =
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else
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quiet=quiet_
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Q = @
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endif
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# If the user is running make -s (silent mode), suppress echoing of
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# commands
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ifneq ($(findstring s,$(MAKEFLAGS)),)
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quiet=silent_
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endif
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export quiet Q KBUILD_VERBOSE
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######
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# cc support functions to be used (only) in arch/$(ARCH)/Makefile
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# See documentation in Documentation/kbuild/makefiles.txt
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# cc-option
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# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
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cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
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> /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
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# For backward compatibility
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check_gcc = $(warning check_gcc is deprecated - use cc-option) \
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$(call cc-option, $(1),$(2))
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# cc-option-yn
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# Usage: flag := $(call cc-option-yn, -march=winchip-c6)
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cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
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> /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
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# cc-option-align
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# Prefix align with either -falign or -malign
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cc-option-align = $(subst -functions=0,,\
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$(call cc-option,-falign-functions=0,-malign-functions=0))
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# cc-version
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# Usage gcc-ver := $(call cc-version $(CC))
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cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
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$(if $(1), $(1), $(CC)))
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# Look for make include files relative to root of kernel src
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MAKEFLAGS += --include-dir=$(srctree)
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# We need some generic definitions
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include $(srctree)/scripts/Kbuild.include
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# For maximum performance (+ possibly random breakage, uncomment
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# the following)
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#MAKEFLAGS += -rR
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# Make variables (CC, etc...)
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AS = $(CROSS_COMPILE)as
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LD = $(CROSS_COMPILE)ld
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CC = $(CROSS_COMPILE)gcc
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CPP = $(CC) -E
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AR = $(CROSS_COMPILE)ar
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NM = $(CROSS_COMPILE)nm
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STRIP = $(CROSS_COMPILE)strip
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OBJCOPY = $(CROSS_COMPILE)objcopy
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OBJDUMP = $(CROSS_COMPILE)objdump
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AWK = awk
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GENKSYMS = scripts/genksyms/genksyms
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DEPMOD = /sbin/depmod
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KALLSYMS = scripts/kallsyms
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PERL = perl
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CHECK = sparse
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CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
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MODFLAGS = -DMODULE
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CFLAGS_MODULE = $(MODFLAGS)
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AFLAGS_MODULE = $(MODFLAGS)
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LDFLAGS_MODULE = -r
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CFLAGS_KERNEL =
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AFLAGS_KERNEL =
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# Use LINUXINCLUDE when you must reference the include/ directory.
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# Needed to be compatible with the O= option
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LINUXINCLUDE := -Iinclude \
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$(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
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-include include/linux/autoconf.h
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CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
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CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
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-fno-strict-aliasing -fno-common \
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-ffreestanding
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AFLAGS := -D__ASSEMBLY__
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export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \
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ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
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CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
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HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
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export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
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export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
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export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
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# When compiling out-of-tree modules, put MODVERDIR in the module
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# tree rather than in the kernel tree. The kernel tree might
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# even be read-only.
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export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
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# Files to ignore in find ... statements
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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
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export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
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# ===========================================================================
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# Rules shared between *config targets and build targets
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# Basic helpers built in scripts/
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.PHONY: scripts_basic
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scripts_basic:
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$(Q)$(MAKE) $(build)=scripts/basic
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# To avoid any implicit rule to kick in, define an empty command.
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scripts/basic/%: scripts_basic ;
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.PHONY: outputmakefile
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# outputmakefile generate a Makefile to be placed in output directory, if
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# using a seperate output directory. This allows convinient use
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# of make in output directory
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outputmakefile:
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$(Q)if test ! $(srctree) -ef $(objtree); then \
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$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
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$(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
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> $(objtree)/Makefile; \
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echo ' GEN $(objtree)/Makefile'; \
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fi
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# To make sure we do not include .config for any of the *config targets
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# catch them early, and hand them over to scripts/kconfig/Makefile
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# It is allowed to specify more targets when calling make, including
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# mixing *config targets and build targets.
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# For example 'make oldconfig all'.
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# Detect when mixed targets is specified, and make a second invocation
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# of make so .config is not included in this case either (for *config).
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no-dot-config-targets := clean mrproper distclean \
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cscope TAGS tags help %docs check% kernelrelease
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config-targets := 0
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mixed-targets := 0
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dot-config := 1
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ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
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ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
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dot-config := 0
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endif
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endif
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ifeq ($(KBUILD_EXTMOD),)
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ifneq ($(filter config %config,$(MAKECMDGOALS)),)
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config-targets := 1
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ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
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mixed-targets := 1
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endif
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endif
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endif
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ifeq ($(mixed-targets),1)
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# ===========================================================================
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# We're called with mixed targets (*config and build targets).
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# Handle them one by one.
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%:: FORCE
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$(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
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else
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ifeq ($(config-targets),1)
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# ===========================================================================
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# *config targets only - make sure prerequisites are updated, and descend
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|
# in scripts/kconfig to make the *config target
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# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
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# KBUILD_DEFCONFIG may point out an alternative default configuration
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|
# used for 'make defconfig'
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include $(srctree)/arch/$(ARCH)/Makefile
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export KBUILD_DEFCONFIG
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|
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config %config: scripts_basic outputmakefile FORCE
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|
$(Q)mkdir -p include/linux
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$(Q)$(MAKE) $(build)=scripts/kconfig $@
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else
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# ===========================================================================
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|
# Build targets only - this includes vmlinux, arch specific targets, clean
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|
# targets and others. In general all targets except *config targets.
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|
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ifeq ($(KBUILD_EXTMOD),)
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# Additional helpers built in scripts/
|
|
# Carefully list dependencies so we do not try to build scripts twice
|
|
# in parrallel
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|
.PHONY: scripts
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|
scripts: scripts_basic include/config/MARKER
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|
$(Q)$(MAKE) $(build)=$(@)
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scripts_basic: include/linux/autoconf.h
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|
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# Objects we will link into vmlinux / subdirs we need to visit
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|
init-y := init/
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drivers-y := drivers/ sound/
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|
net-y := net/
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|
libs-y := lib/
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|
core-y := usr/
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|
endif # KBUILD_EXTMOD
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|
|
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ifeq ($(dot-config),1)
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|
# In this section, we need .config
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|
|
|
# Read in dependencies to all Kconfig* files, make sure to run
|
|
# oldconfig if changes are detected.
|
|
-include .config.cmd
|
|
|
|
include .config
|
|
|
|
# If .config needs to be updated, it will be done via the dependency
|
|
# that autoconf has on .config.
|
|
# To avoid any implicit rule to kick in, define an empty command
|
|
.config: ;
|
|
|
|
# If .config is newer than include/linux/autoconf.h, someone tinkered
|
|
# with it and forgot to run make oldconfig
|
|
include/linux/autoconf.h: .config
|
|
$(Q)mkdir -p include/linux
|
|
$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
|
|
else
|
|
# Dummy target needed, because used as prerequisite
|
|
include/linux/autoconf.h: ;
|
|
endif
|
|
|
|
# The all: target is the default when no target is given on the
|
|
# command line.
|
|
# This allow a user to issue only 'make' to build a kernel including modules
|
|
# Defaults vmlinux but it is usually overriden in the arch makefile
|
|
all: vmlinux
|
|
|
|
ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
|
|
CFLAGS += -Os
|
|
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
|
|
CFLAGS += -fomit-frame-pointer
|
|
endif
|
|
|
|
ifdef CONFIG_DEBUG_INFO
|
|
CFLAGS += -g
|
|
endif
|
|
|
|
include $(srctree)/arch/$(ARCH)/Makefile
|
|
|
|
# arch Makefile may override CC so keep this after arch Makefile is included
|
|
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
|
|
CHECKFLAGS += $(NOSTDINC_FLAGS)
|
|
|
|
# warn about C99 declaration after statement
|
|
CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
|
|
|
|
# disable pointer signedness warnings in gcc 4.0
|
|
CFLAGS += $(call cc-option,-Wno-pointer-sign,)
|
|
|
|
# Default kernel image to build when no specific target is given.
|
|
# KBUILD_IMAGE may be overruled on the commandline or
|
|
# set in the environment
|
|
# Also any assignments in arch/$(ARCH)/Makefile take precedence over
|
|
# this default value
|
|
export KBUILD_IMAGE ?= vmlinux
|
|
|
|
#
|
|
# INSTALL_PATH specifies where to place the updated kernel and system map
|
|
# images. Default is /boot, but you can set it to other values
|
|
export INSTALL_PATH ?= /boot
|
|
|
|
# If CONFIG_LOCALVERSION_AUTO is set, we automatically perform some tests
|
|
# and try to determine if the current source tree is a release tree, of any sort,
|
|
# or if is a pure development tree.
|
|
#
|
|
# A 'release tree' is any tree with a git TAG associated
|
|
# with it. The primary goal of this is to make it safe for a native
|
|
# git/CVS/SVN user to build a release tree (i.e, 2.6.9) and also to
|
|
# continue developing against the current Linus tree, without having the Linus
|
|
# tree overwrite the 2.6.9 tree when installed.
|
|
#
|
|
# Currently, only git is supported.
|
|
# Other SCMs can edit scripts/setlocalversion and add the appropriate
|
|
# checks as needed.
|
|
|
|
|
|
ifdef CONFIG_LOCALVERSION_AUTO
|
|
localversion-auto := $(shell $(PERL) $(srctree)/scripts/setlocalversion $(srctree))
|
|
LOCALVERSION := $(LOCALVERSION)$(localversion-auto)
|
|
endif
|
|
|
|
#
|
|
# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
|
|
# relocations required by build roots. This is not defined in the
|
|
# makefile but the arguement can be passed to make if needed.
|
|
#
|
|
|
|
MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
|
|
export MODLIB
|
|
|
|
|
|
ifeq ($(KBUILD_EXTMOD),)
|
|
core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
|
|
|
|
vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
|
|
$(core-y) $(core-m) $(drivers-y) $(drivers-m) \
|
|
$(net-y) $(net-m) $(libs-y) $(libs-m)))
|
|
|
|
vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
|
|
$(init-n) $(init-) \
|
|
$(core-n) $(core-) $(drivers-n) $(drivers-) \
|
|
$(net-n) $(net-) $(libs-n) $(libs-))))
|
|
|
|
init-y := $(patsubst %/, %/built-in.o, $(init-y))
|
|
core-y := $(patsubst %/, %/built-in.o, $(core-y))
|
|
drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
|
|
net-y := $(patsubst %/, %/built-in.o, $(net-y))
|
|
libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
|
|
libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
|
|
libs-y := $(libs-y1) $(libs-y2)
|
|
|
|
# Build vmlinux
|
|
# ---------------------------------------------------------------------------
|
|
# vmlinux is build from the objects selected by $(vmlinux-init) and
|
|
# $(vmlinux-main). Most are built-in.o files from top-level directories
|
|
# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
|
|
# Ordering when linking is important, and $(vmlinux-init) must be first.
|
|
#
|
|
# vmlinux
|
|
# ^
|
|
# |
|
|
# +-< $(vmlinux-init)
|
|
# | +--< init/version.o + more
|
|
# |
|
|
# +--< $(vmlinux-main)
|
|
# | +--< driver/built-in.o mm/built-in.o + more
|
|
# |
|
|
# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
|
|
#
|
|
# vmlinux version (uname -v) cannot be updated during normal
|
|
# descending-into-subdirs phase since we do not yet know if we need to
|
|
# update vmlinux.
|
|
# Therefore this step is delayed until just before final link of vmlinux -
|
|
# except in the kallsyms case where it is done just before adding the
|
|
# symbols to the kernel.
|
|
#
|
|
# System.map is generated to document addresses of all kernel symbols
|
|
|
|
vmlinux-init := $(head-y) $(init-y)
|
|
vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
|
|
vmlinux-all := $(vmlinux-init) $(vmlinux-main)
|
|
vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
|
|
|
|
# Rule to link vmlinux - also used during CONFIG_KALLSYMS
|
|
# May be overridden by arch/$(ARCH)/Makefile
|
|
quiet_cmd_vmlinux__ ?= LD $@
|
|
cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
|
|
-T $(vmlinux-lds) $(vmlinux-init) \
|
|
--start-group $(vmlinux-main) --end-group \
|
|
$(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
|
|
|
|
# Generate new vmlinux version
|
|
quiet_cmd_vmlinux_version = GEN .version
|
|
cmd_vmlinux_version = set -e; \
|
|
if [ ! -r .version ]; then \
|
|
rm -f .version; \
|
|
echo 1 >.version; \
|
|
else \
|
|
mv .version .old_version; \
|
|
expr 0$$(cat .old_version) + 1 >.version; \
|
|
fi; \
|
|
$(MAKE) $(build)=init
|
|
|
|
# Generate System.map
|
|
quiet_cmd_sysmap = SYSMAP
|
|
cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
|
|
|
|
# Link of vmlinux
|
|
# If CONFIG_KALLSYMS is set .version is already updated
|
|
# Generate System.map and verify that the content is consistent
|
|
# Use + in front of the vmlinux_version rule to silent warning with make -j2
|
|
# First command is ':' to allow us to use + in front of the rule
|
|
define rule_vmlinux__
|
|
:
|
|
$(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
|
|
|
|
$(call cmd,vmlinux__)
|
|
$(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
|
|
|
|
$(Q)$(if $($(quiet)cmd_sysmap), \
|
|
echo ' $($(quiet)cmd_sysmap) System.map' &&) \
|
|
$(cmd_sysmap) $@ System.map; \
|
|
if [ $$? -ne 0 ]; then \
|
|
rm -f $@; \
|
|
/bin/false; \
|
|
fi;
|
|
$(verify_kallsyms)
|
|
endef
|
|
|
|
|
|
ifdef CONFIG_KALLSYMS
|
|
# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
|
|
# It's a three stage process:
|
|
# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
|
|
# empty
|
|
# Running kallsyms on that gives us .tmp_kallsyms1.o with
|
|
# the right size - vmlinux version (uname -v) is updated during this step
|
|
# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
|
|
# but due to the added section, some addresses have shifted.
|
|
# From here, we generate a correct .tmp_kallsyms2.o
|
|
# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
|
|
# o Verify that the System.map from vmlinux matches the map from
|
|
# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
|
|
# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
|
|
# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
|
|
# temporary bypass to allow the kernel to be built while the
|
|
# maintainers work out what went wrong with kallsyms.
|
|
|
|
ifdef CONFIG_KALLSYMS_EXTRA_PASS
|
|
last_kallsyms := 3
|
|
else
|
|
last_kallsyms := 2
|
|
endif
|
|
|
|
kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
|
|
|
|
define verify_kallsyms
|
|
$(Q)$(if $($(quiet)cmd_sysmap), \
|
|
echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
|
|
$(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
|
|
$(Q)cmp -s System.map .tmp_System.map || \
|
|
(echo Inconsistent kallsyms data; \
|
|
echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
|
|
rm .tmp_kallsyms* ; /bin/false )
|
|
endef
|
|
|
|
# Update vmlinux version before link
|
|
# Use + in front of this rule to silent warning about make -j1
|
|
# First command is ':' to allow us to use + in front of this rule
|
|
cmd_ksym_ld = $(cmd_vmlinux__)
|
|
define rule_ksym_ld
|
|
:
|
|
+$(call cmd,vmlinux_version)
|
|
$(call cmd,vmlinux__)
|
|
$(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
|
|
endef
|
|
|
|
# Generate .S file with all kernel symbols
|
|
quiet_cmd_kallsyms = KSYM $@
|
|
cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
|
|
$(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
|
|
|
|
.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
|
|
$(call if_changed_dep,as_o_S)
|
|
|
|
.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
|
|
$(call cmd,kallsyms)
|
|
|
|
# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
|
|
.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
|
|
$(call if_changed_rule,ksym_ld)
|
|
|
|
.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
|
|
$(call if_changed,vmlinux__)
|
|
|
|
.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
|
|
$(call if_changed,vmlinux__)
|
|
|
|
# Needs to visit scripts/ before $(KALLSYMS) can be used.
|
|
$(KALLSYMS): scripts ;
|
|
|
|
# Generate some data for debugging strange kallsyms problems
|
|
debug_kallsyms: .tmp_map$(last_kallsyms)
|
|
|
|
.tmp_map%: .tmp_vmlinux% FORCE
|
|
($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
|
|
|
|
.tmp_map3: .tmp_map2
|
|
|
|
.tmp_map2: .tmp_map1
|
|
|
|
endif # ifdef CONFIG_KALLSYMS
|
|
|
|
# vmlinux image - including updated kernel symbols
|
|
vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
|
|
$(call if_changed_rule,vmlinux__)
|
|
$(Q)rm -f .old_version
|
|
|
|
# The actual objects are generated when descending,
|
|
# make sure no implicit rule kicks in
|
|
$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
|
|
|
|
# Handle descending into subdirectories listed in $(vmlinux-dirs)
|
|
# Preset locale variables to speed up the build process. Limit locale
|
|
# tweaks to this spot to avoid wrong language settings when running
|
|
# make menuconfig etc.
|
|
# Error messages still appears in the original language
|
|
|
|
.PHONY: $(vmlinux-dirs)
|
|
$(vmlinux-dirs): prepare scripts
|
|
$(Q)$(MAKE) $(build)=$@
|
|
|
|
# Things we need to do before we recursively start building the kernel
|
|
# or the modules are listed in "prepare".
|
|
# A multi level approach is used. prepareN is processed before prepareN-1.
|
|
# archprepare is used in arch Makefiles and when processed asm symlink,
|
|
# version.h and scripts_basic is processed / created.
|
|
|
|
# Listed in dependency order
|
|
.PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
|
|
|
|
# prepare-all is deprecated, use prepare as valid replacement
|
|
.PHONY: prepare-all
|
|
|
|
# prepare3 is used to check if we are building in a separate output directory,
|
|
# and if so do:
|
|
# 1) Check that make has not been executed in the kernel src $(srctree)
|
|
# 2) Create the include2 directory, used for the second asm symlink
|
|
|
|
prepare3:
|
|
ifneq ($(KBUILD_SRC),)
|
|
@echo ' Using $(srctree) as source for kernel'
|
|
$(Q)if [ -f $(srctree)/.config ]; then \
|
|
echo " $(srctree) is not clean, please run 'make mrproper'";\
|
|
echo " in the '$(srctree)' directory.";\
|
|
/bin/false; \
|
|
fi;
|
|
$(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
|
|
$(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
|
|
endif
|
|
|
|
# prepare2 creates a makefile if using a separate output directory
|
|
prepare2: prepare3 outputmakefile
|
|
|
|
prepare1: prepare2 include/linux/version.h include/asm \
|
|
include/config/MARKER
|
|
ifneq ($(KBUILD_MODULES),)
|
|
$(Q)rm -rf $(MODVERDIR)
|
|
$(Q)mkdir -p $(MODVERDIR)
|
|
endif
|
|
|
|
archprepare: prepare1 scripts_basic
|
|
|
|
prepare0: archprepare FORCE
|
|
$(Q)$(MAKE) $(build)=.
|
|
|
|
# All the preparing..
|
|
prepare prepare-all: prepare0
|
|
|
|
# Leave this as default for preprocessing vmlinux.lds.S, which is now
|
|
# done in arch/$(ARCH)/kernel/Makefile
|
|
|
|
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.
|
|
|
|
include/asm:
|
|
@echo ' SYMLINK $@ -> include/asm-$(ARCH)'
|
|
$(Q)if [ ! -d include ]; then mkdir -p include; fi;
|
|
@ln -fsn asm-$(ARCH) $@
|
|
|
|
# Split autoconf.h into include/linux/config/*
|
|
|
|
include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
|
|
@echo ' SPLIT include/linux/autoconf.h -> include/config/*'
|
|
@scripts/basic/split-include include/linux/autoconf.h include/config
|
|
@touch $@
|
|
|
|
# Generate some files
|
|
# ---------------------------------------------------------------------------
|
|
|
|
# KERNELRELEASE can change from a few different places, meaning version.h
|
|
# needs to be updated, so this check is forced on all builds
|
|
|
|
uts_len := 64
|
|
|
|
define filechk_version.h
|
|
if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
|
|
echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
|
|
exit 1; \
|
|
fi; \
|
|
(echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
|
|
echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
|
|
echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
|
|
)
|
|
endef
|
|
|
|
include/linux/version.h: $(srctree)/Makefile FORCE
|
|
$(call filechk,version.h)
|
|
|
|
# ---------------------------------------------------------------------------
|
|
|
|
.PHONY: depend dep
|
|
depend dep:
|
|
@echo '*** Warning: make $@ is unnecessary now.'
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Modules
|
|
|
|
ifdef CONFIG_MODULES
|
|
|
|
# By default, build modules as well
|
|
|
|
all: modules
|
|
|
|
# Build modules
|
|
|
|
.PHONY: modules
|
|
modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
|
|
@echo ' Building modules, stage 2.';
|
|
$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
|
|
|
|
|
|
# Target to prepare building external modules
|
|
.PHONY: modules_prepare
|
|
modules_prepare: prepare scripts
|
|
|
|
# Target to install modules
|
|
.PHONY: modules_install
|
|
modules_install: _modinst_ _modinst_post
|
|
|
|
.PHONY: _modinst_
|
|
_modinst_:
|
|
@if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
|
|
echo "Warning: you may need to install module-init-tools"; \
|
|
echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
|
|
sleep 1; \
|
|
fi
|
|
@rm -rf $(MODLIB)/kernel
|
|
@rm -f $(MODLIB)/source
|
|
@mkdir -p $(MODLIB)/kernel
|
|
@ln -s $(srctree) $(MODLIB)/source
|
|
@if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
|
|
rm -f $(MODLIB)/build ; \
|
|
ln -s $(objtree) $(MODLIB)/build ; \
|
|
fi
|
|
$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
|
|
|
|
# If System.map exists, run depmod. This deliberately does not have a
|
|
# dependency on System.map since that would run the dependency tree on
|
|
# vmlinux. This depmod is only for convenience to give the initial
|
|
# boot a modules.dep even before / is mounted read-write. However the
|
|
# boot script depmod is the master version.
|
|
ifeq "$(strip $(INSTALL_MOD_PATH))" ""
|
|
depmod_opts :=
|
|
else
|
|
depmod_opts := -b $(INSTALL_MOD_PATH) -r
|
|
endif
|
|
.PHONY: _modinst_post
|
|
_modinst_post: _modinst_
|
|
if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
|
|
|
|
else # CONFIG_MODULES
|
|
|
|
# Modules not configured
|
|
# ---------------------------------------------------------------------------
|
|
|
|
modules modules_install: FORCE
|
|
@echo
|
|
@echo "The present kernel configuration has modules disabled."
|
|
@echo "Type 'make config' and enable loadable module support."
|
|
@echo "Then build a kernel with module support enabled."
|
|
@echo
|
|
@exit 1
|
|
|
|
endif # CONFIG_MODULES
|
|
|
|
###
|
|
# Cleaning is done on three levels.
|
|
# make clean Delete most generated files
|
|
# Leave enough to build external modules
|
|
# make mrproper Delete the current configuration, and all generated files
|
|
# make distclean Remove editor backup files, patch leftover files and the like
|
|
|
|
# Directories & files removed with 'make clean'
|
|
CLEAN_DIRS += $(MODVERDIR)
|
|
CLEAN_FILES += vmlinux System.map \
|
|
.tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
|
|
|
|
# Directories & files removed with 'make mrproper'
|
|
MRPROPER_DIRS += include/config include2
|
|
MRPROPER_FILES += .config .config.old include/asm .version \
|
|
include/linux/autoconf.h include/linux/version.h \
|
|
Module.symvers tags TAGS cscope*
|
|
|
|
# clean - Delete most, but leave enough to build external modules
|
|
#
|
|
clean: rm-dirs := $(CLEAN_DIRS)
|
|
clean: rm-files := $(CLEAN_FILES)
|
|
clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
|
|
|
|
.PHONY: $(clean-dirs) clean archclean
|
|
$(clean-dirs):
|
|
$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
|
|
|
|
clean: archclean $(clean-dirs)
|
|
$(call cmd,rmdirs)
|
|
$(call cmd,rmfiles)
|
|
@find . $(RCS_FIND_IGNORE) \
|
|
\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
|
|
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
|
|
-type f -print | xargs rm -f
|
|
|
|
# mrproper - Delete all generated files, including .config
|
|
#
|
|
mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
|
|
mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
|
|
mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
|
|
|
|
.PHONY: $(mrproper-dirs) mrproper archmrproper
|
|
$(mrproper-dirs):
|
|
$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
|
|
|
|
mrproper: clean archmrproper $(mrproper-dirs)
|
|
$(call cmd,rmdirs)
|
|
$(call cmd,rmfiles)
|
|
|
|
# distclean
|
|
#
|
|
.PHONY: distclean
|
|
|
|
distclean: mrproper
|
|
@find $(srctree) $(RCS_FIND_IGNORE) \
|
|
\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
|
|
-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
|
|
-o -name '.*.rej' -o -size 0 \
|
|
-o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
|
|
-type f -print | xargs rm -f
|
|
|
|
|
|
# Packaging of the kernel to various formats
|
|
# ---------------------------------------------------------------------------
|
|
# rpm target kept for backward compatibility
|
|
package-dir := $(srctree)/scripts/package
|
|
|
|
.PHONY: %-pkg rpm
|
|
|
|
%pkg: FORCE
|
|
$(Q)$(MAKE) -f $(package-dir)/Makefile $@
|
|
rpm: FORCE
|
|
$(Q)$(MAKE) -f $(package-dir)/Makefile $@
|
|
|
|
|
|
# Brief documentation of the typical targets used
|
|
# ---------------------------------------------------------------------------
|
|
|
|
boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
|
|
boards := $(notdir $(boards))
|
|
|
|
help:
|
|
@echo 'Cleaning targets:'
|
|
@echo ' clean - remove most generated files but keep the config'
|
|
@echo ' mrproper - remove all generated files + config + various backup files'
|
|
@echo ''
|
|
@echo 'Configuration targets:'
|
|
@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
|
|
@echo ''
|
|
@echo 'Other generic targets:'
|
|
@echo ' all - Build all targets marked with [*]'
|
|
@echo '* vmlinux - Build the bare kernel'
|
|
@echo '* modules - Build all modules'
|
|
@echo ' modules_install - Install all modules'
|
|
@echo ' dir/ - Build all files in dir and below'
|
|
@echo ' dir/file.[ois] - Build specified target only'
|
|
@echo ' dir/file.ko - Build module including final link'
|
|
@echo ' rpm - Build a kernel as an RPM package'
|
|
@echo ' tags/TAGS - Generate tags file for editors'
|
|
@echo ' cscope - Generate cscope index'
|
|
@echo ' kernelrelease - Output the release version string'
|
|
@echo ''
|
|
@echo 'Static analysers'
|
|
@echo ' buildcheck - List dangling references to vmlinux discarded sections'
|
|
@echo ' and init sections from non-init sections'
|
|
@echo ' checkstack - Generate a list of stack hogs'
|
|
@echo ' namespacecheck - Name space analysis on compiled kernel'
|
|
@echo ''
|
|
@echo 'Kernel packaging:'
|
|
@$(MAKE) -f $(package-dir)/Makefile help
|
|
@echo ''
|
|
@echo 'Documentation targets:'
|
|
@$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
|
|
@echo ''
|
|
@echo 'Architecture specific targets ($(ARCH)):'
|
|
@$(if $(archhelp),$(archhelp),\
|
|
echo ' No architecture specific help defined for $(ARCH)')
|
|
@echo ''
|
|
@$(if $(boards), \
|
|
$(foreach b, $(boards), \
|
|
printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
|
|
echo '')
|
|
|
|
@echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
|
|
@echo ' make O=dir [targets] Locate all output files in "dir", including .config'
|
|
@echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
|
|
@echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
|
|
@echo ''
|
|
@echo 'Execute "make" or "make all" to build all targets marked with [*] '
|
|
@echo 'For further info see the ./README file'
|
|
|
|
|
|
# Documentation targets
|
|
# ---------------------------------------------------------------------------
|
|
%docs: scripts_basic FORCE
|
|
$(Q)$(MAKE) $(build)=Documentation/DocBook $@
|
|
|
|
else # KBUILD_EXTMOD
|
|
|
|
###
|
|
# External module support.
|
|
# When building external modules the kernel used as basis is considered
|
|
# read-only, and no consistency checks are made and the make
|
|
# system is not used on the basis kernel. If updates are required
|
|
# in the basis kernel ordinary make commands (without M=...) must
|
|
# be used.
|
|
#
|
|
# The following are the only valid targets when building external
|
|
# modules.
|
|
# make M=dir clean Delete all automatically generated files
|
|
# make M=dir modules Make all modules in specified dir
|
|
# make M=dir Same as 'make M=dir modules'
|
|
# make M=dir modules_install
|
|
# Install the modules build in the module directory
|
|
# Assumes install directory is already created
|
|
|
|
# We are always building modules
|
|
KBUILD_MODULES := 1
|
|
.PHONY: crmodverdir
|
|
crmodverdir:
|
|
$(Q)mkdir -p $(MODVERDIR)
|
|
|
|
.PHONY: $(objtree)/Module.symvers
|
|
$(objtree)/Module.symvers:
|
|
@test -e $(objtree)/Module.symvers || ( \
|
|
echo; \
|
|
echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
|
|
echo " is missing; modules will have no dependencies and modversions."; \
|
|
echo )
|
|
|
|
module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
|
|
.PHONY: $(module-dirs) modules
|
|
$(module-dirs): crmodverdir $(objtree)/Module.symvers
|
|
$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
|
|
|
|
modules: $(module-dirs)
|
|
@echo ' Building modules, stage 2.';
|
|
$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
|
|
|
|
.PHONY: modules_install
|
|
modules_install:
|
|
$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
|
|
|
|
clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
|
|
|
|
.PHONY: $(clean-dirs) clean
|
|
$(clean-dirs):
|
|
$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
|
|
|
|
clean: rm-dirs := $(MODVERDIR)
|
|
clean: $(clean-dirs)
|
|
$(call cmd,rmdirs)
|
|
@find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
|
|
\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
|
|
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
|
|
-type f -print | xargs rm -f
|
|
|
|
help:
|
|
@echo ' Building external modules.'
|
|
@echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
|
|
@echo ''
|
|
@echo ' modules - default target, build the module(s)'
|
|
@echo ' modules_install - install the module'
|
|
@echo ' clean - remove generated files in module directory only'
|
|
@echo ''
|
|
endif # KBUILD_EXTMOD
|
|
|
|
# Generate tags for editors
|
|
# ---------------------------------------------------------------------------
|
|
|
|
#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
|
|
#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
|
|
#Adding $(srctree) adds about 20M on i386 to the size of the output file!
|
|
|
|
ifeq ($(src),$(obj))
|
|
__srctree =
|
|
else
|
|
__srctree = $(srctree)/
|
|
endif
|
|
|
|
ifeq ($(ALLSOURCE_ARCHS),)
|
|
ifeq ($(ARCH),um)
|
|
ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
|
|
else
|
|
ALLINCLUDE_ARCHS := $(ARCH)
|
|
endif
|
|
else
|
|
#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
|
|
ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
|
|
endif
|
|
|
|
ALLSOURCE_ARCHS := $(ARCH)
|
|
|
|
define all-sources
|
|
( find $(__srctree) $(RCS_FIND_IGNORE) \
|
|
\( -name include -o -name arch \) -prune -o \
|
|
-name '*.[chS]' -print; \
|
|
for ARCH in $(ALLSOURCE_ARCHS) ; do \
|
|
find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
|
|
-name '*.[chS]' -print; \
|
|
done ; \
|
|
find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
|
|
-name '*.[chS]' -print; \
|
|
find $(__srctree)include $(RCS_FIND_IGNORE) \
|
|
\( -name config -o -name 'asm-*' \) -prune \
|
|
-o -name '*.[chS]' -print; \
|
|
for ARCH in $(ALLINCLUDE_ARCHS) ; do \
|
|
find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
|
|
-name '*.[chS]' -print; \
|
|
done ; \
|
|
find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
|
|
-name '*.[chS]' -print )
|
|
endef
|
|
|
|
quiet_cmd_cscope-file = FILELST cscope.files
|
|
cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
|
|
|
|
quiet_cmd_cscope = MAKE cscope.out
|
|
cmd_cscope = cscope -b
|
|
|
|
cscope: FORCE
|
|
$(call cmd,cscope-file)
|
|
$(call cmd,cscope)
|
|
|
|
quiet_cmd_TAGS = MAKE $@
|
|
define cmd_TAGS
|
|
rm -f $@; \
|
|
ETAGSF=`etags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \
|
|
$(all-sources) | xargs etags $$ETAGSF -a
|
|
endef
|
|
|
|
TAGS: FORCE
|
|
$(call cmd,TAGS)
|
|
|
|
|
|
quiet_cmd_tags = MAKE $@
|
|
define cmd_tags
|
|
rm -f $@; \
|
|
CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \
|
|
$(all-sources) | xargs ctags $$CTAGSF -a
|
|
endef
|
|
|
|
tags: FORCE
|
|
$(call cmd,tags)
|
|
|
|
|
|
# Scripts to check various things for consistency
|
|
# ---------------------------------------------------------------------------
|
|
|
|
includecheck:
|
|
find * $(RCS_FIND_IGNORE) \
|
|
-name '*.[hcS]' -type f -print | sort \
|
|
| xargs $(PERL) -w scripts/checkincludes.pl
|
|
|
|
versioncheck:
|
|
find * $(RCS_FIND_IGNORE) \
|
|
-name '*.[hcS]' -type f -print | sort \
|
|
| xargs $(PERL) -w scripts/checkversion.pl
|
|
|
|
buildcheck:
|
|
$(PERL) $(srctree)/scripts/reference_discarded.pl
|
|
$(PERL) $(srctree)/scripts/reference_init.pl
|
|
|
|
namespacecheck:
|
|
$(PERL) $(srctree)/scripts/namespace.pl
|
|
|
|
endif #ifeq ($(config-targets),1)
|
|
endif #ifeq ($(mixed-targets),1)
|
|
|
|
.PHONY: checkstack
|
|
checkstack:
|
|
$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
|
|
$(PERL) $(src)/scripts/checkstack.pl $(ARCH)
|
|
|
|
kernelrelease:
|
|
@echo $(KERNELRELEASE)
|
|
|
|
# FIXME Should go into a make.lib or something
|
|
# ===========================================================================
|
|
|
|
quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
|
|
cmd_rmdirs = rm -rf $(rm-dirs)
|
|
|
|
quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
|
|
cmd_rmfiles = rm -f $(rm-files)
|
|
|
|
|
|
a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
|
|
$(NOSTDINC_FLAGS) $(CPPFLAGS) \
|
|
$(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
|
|
|
|
quiet_cmd_as_o_S = AS $@
|
|
cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
|
|
|
|
# read all saved command lines
|
|
|
|
targets := $(wildcard $(sort $(targets)))
|
|
cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
|
|
|
|
ifneq ($(cmd_files),)
|
|
$(cmd_files): ; # Do not try to update included dependency files
|
|
include $(cmd_files)
|
|
endif
|
|
|
|
# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
|
|
# Usage:
|
|
# $(Q)$(MAKE) $(clean)=dir
|
|
clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
|
|
|
|
endif # skip-makefile
|
|
|
|
FORCE:
|