2521f2c228
Enable the use of GCC's coverage testing tool gcov [1] with the Linux kernel. gcov may be useful for: * debugging (has this code been reached at all?) * test improvement (how do I change my test to cover these lines?) * minimizing kernel configurations (do I need this option if the associated code is never run?) The profiling patch incorporates the following changes: * change kbuild to include profiling flags * provide functions needed by profiling code * present profiling data as files in debugfs Note that on some architectures, enabling gcc's profiling option "-fprofile-arcs" for the entire kernel may trigger compile/link/ run-time problems, some of which are caused by toolchain bugs and others which require adjustment of architecture code. For this reason profiling the entire kernel is initially restricted to those architectures for which it is known to work without changes. This restriction can be lifted once an architecture has been tested and found compatible with gcc's profiling. Profiling of single files or directories is still available on all platforms (see config help text). [1] http://gcc.gnu.org/onlinedocs/gcc/Gcov.html Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Huang Ying <ying.huang@intel.com> Cc: Li Wei <W.Li@Sun.COM> Cc: Michael Ellerman <michaele@au1.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Heiko Carstens <heicars2@linux.vnet.ibm.com> Cc: Martin Schwidefsky <mschwid2@linux.vnet.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: WANG Cong <xiyou.wangcong@gmail.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Jeff Dike <jdike@addtoit.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1596 lines
54 KiB
Makefile
1596 lines
54 KiB
Makefile
VERSION = 2
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PATCHLEVEL = 6
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SUBLEVEL = 30
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EXTRAVERSION =
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NAME = Man-Eating Seals of Antiquity
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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:
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# o use make's built-in rules and variables
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# (this increases performance and avoids hard-to-debug behaviour);
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# o print "Entering directory ...";
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MAKEFLAGS += -rR --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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ifeq ("$(origin V)", "command line")
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KBUILD_VERBOSE = $(V)
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endif
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ifndef KBUILD_VERBOSE
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KBUILD_VERBOSE = 0
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endif
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# Call a source code checker (by default, "sparse") as part of the
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# C compilation.
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#
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# Use 'make C=1' to enable checking of only re-compiled files.
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# Use 'make C=2' to enable checking of *all* source files, regardless
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# of whether they are re-compiled or not.
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#
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# See the file "Documentation/sparse.txt" for more details, including
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# where to get the "sparse" utility.
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ifeq ("$(origin C)", "command line")
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KBUILD_CHECKSRC = $(C)
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endif
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ifndef KBUILD_CHECKSRC
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KBUILD_CHECKSRC = 0
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endif
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# Use make M=dir to specify directory of external module to build
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# Old syntax make ... SUBDIRS=$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 ?= $(SUBDIRS)
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endif
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ifeq ("$(origin M)", "command line")
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KBUILD_EXTMOD := $(M)
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endif
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# kbuild supports saving output files in a separate directory.
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# To locate output files in a separate directory two syntaxes are supported.
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# In both cases the working directory must be the root of the kernel src.
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# 1) O=
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# Use "make O=dir/to/store/output/files/"
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#
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# 2) Set KBUILD_OUTPUT
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# Set the environment variable KBUILD_OUTPUT to point to the directory
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# where the output files shall be placed.
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# export KBUILD_OUTPUT=dir/to/store/output/files/
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# make
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#
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# The O= assignment takes precedence over the KBUILD_OUTPUT environment
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# variable.
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# KBUILD_SRC is set on invocation of make in OBJ directory
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# KBUILD_SRC is not intended to be used by the regular user (for now)
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ifeq ($(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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ifeq ("$(origin O)", "command line")
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KBUILD_OUTPUT := $(O)
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endif
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# That's our default target when none is given on the command line
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PHONY := _all
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_all:
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# Cancel implicit rules on top Makefile
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$(CURDIR)/Makefile Makefile: ;
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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 += $(MAKECMDGOALS) sub-make
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$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
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$(Q)@:
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sub-make: FORCE
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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 $(CURDIR)/Makefile \
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$(filter-out _all sub-make,$(MAKECMDGOALS))
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# Leave processing to above invocation of make
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skip-makefile := 1
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endif # ifneq ($(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 := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
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export srctree objtree VPATH TOPDIR
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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/ppc.*/powerpc/ -e s/mips.*/mips/ \
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-e s/sh[234].*/sh/ )
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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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export KBUILD_BUILDHOST := $(SUBARCH)
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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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SRCARCH := $(ARCH)
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# Additional ARCH settings for x86
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ifeq ($(ARCH),i386)
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SRCARCH := x86
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endif
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ifeq ($(ARCH),x86_64)
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SRCARCH := x86
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endif
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# Additional ARCH settings for sparc
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ifeq ($(ARCH),sparc64)
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SRCARCH := sparc
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endif
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# Additional ARCH settings for sh
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ifeq ($(ARCH),sh64)
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SRCARCH := sh
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endif
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# Where to locate arch specific headers
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hdr-arch := $(SRCARCH)
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ifeq ($(ARCH),m68knommu)
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hdr-arch := m68k
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endif
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KCONFIG_CONFIG ?= .config
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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 up to date 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 will 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 useful
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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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# Look for make include files relative to root of kernel src
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MAKEFLAGS += --include-dir=$(srctree)
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# We need some generic definitions (do not try to remake the file).
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$(srctree)/scripts/Kbuild.include: ;
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include $(srctree)/scripts/Kbuild.include
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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__ \
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-Wbitwise -Wno-return-void $(CF)
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MODFLAGS = -DMODULE
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CFLAGS_MODULE = $(MODFLAGS)
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AFLAGS_MODULE = $(MODFLAGS)
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LDFLAGS_MODULE =
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CFLAGS_KERNEL =
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AFLAGS_KERNEL =
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CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
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# Use LINUXINCLUDE when you must reference the include/ directory.
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# Needed to be compatible with the O= option
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LINUXINCLUDE := -Iinclude \
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$(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
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-I$(srctree)/arch/$(hdr-arch)/include \
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-include include/linux/autoconf.h
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KBUILD_CPPFLAGS := -D__KERNEL__
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KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
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-fno-strict-aliasing -fno-common \
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-Werror-implicit-function-declaration
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KBUILD_AFLAGS := -D__ASSEMBLY__
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|
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# Read KERNELRELEASE from include/config/kernel.release (if it exists)
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KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
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KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
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export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
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export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
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export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
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export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
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export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
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export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
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export KBUILD_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/
|
|
PHONY += scripts_basic
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scripts_basic:
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$(Q)$(MAKE) $(build)=scripts/basic
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|
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# To avoid any implicit rule to kick in, define an empty command.
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scripts/basic/%: scripts_basic ;
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|
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PHONY += outputmakefile
|
|
# outputmakefile generates a Makefile in the output directory, if using a
|
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# separate output directory. This allows convenient use of make in the
|
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# output directory.
|
|
outputmakefile:
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ifneq ($(KBUILD_SRC),)
|
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$(Q)ln -fsn $(srctree) source
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|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
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$(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
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endif
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|
|
|
# To make sure we do not include .config for any of the *config targets
|
|
# catch them early, and hand them over to scripts/kconfig/Makefile
|
|
# It is allowed to specify more targets when calling make, including
|
|
# mixing *config targets and build targets.
|
|
# For example 'make oldconfig all'.
|
|
# Detect when mixed targets is specified, and make a second invocation
|
|
# of make so .config is not included in this case either (for *config).
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|
|
|
no-dot-config-targets := clean mrproper distclean \
|
|
cscope TAGS tags help %docs check% \
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|
include/linux/version.h headers_% \
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|
kernelrelease kernelversion
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|
|
|
config-targets := 0
|
|
mixed-targets := 0
|
|
dot-config := 1
|
|
|
|
ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
|
|
ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
|
|
dot-config := 0
|
|
endif
|
|
endif
|
|
|
|
ifeq ($(KBUILD_EXTMOD),)
|
|
ifneq ($(filter config %config,$(MAKECMDGOALS)),)
|
|
config-targets := 1
|
|
ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
|
|
mixed-targets := 1
|
|
endif
|
|
endif
|
|
endif
|
|
|
|
ifeq ($(mixed-targets),1)
|
|
# ===========================================================================
|
|
# We're called with mixed targets (*config and build targets).
|
|
# Handle them one by one.
|
|
|
|
%:: FORCE
|
|
$(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
|
|
|
|
else
|
|
ifeq ($(config-targets),1)
|
|
# ===========================================================================
|
|
# *config targets only - make sure prerequisites are updated, and descend
|
|
# in scripts/kconfig to make the *config target
|
|
|
|
# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
|
|
# KBUILD_DEFCONFIG may point out an alternative default configuration
|
|
# used for 'make defconfig'
|
|
include $(srctree)/arch/$(SRCARCH)/Makefile
|
|
export KBUILD_DEFCONFIG KBUILD_KCONFIG
|
|
|
|
config: scripts_basic outputmakefile FORCE
|
|
$(Q)mkdir -p include/linux include/config
|
|
$(Q)$(MAKE) $(build)=scripts/kconfig $@
|
|
|
|
%config: scripts_basic outputmakefile FORCE
|
|
$(Q)mkdir -p include/linux include/config
|
|
$(Q)$(MAKE) $(build)=scripts/kconfig $@
|
|
|
|
else
|
|
# ===========================================================================
|
|
# Build targets only - this includes vmlinux, arch specific targets, clean
|
|
# targets and others. In general all targets except *config targets.
|
|
|
|
ifeq ($(KBUILD_EXTMOD),)
|
|
# Additional helpers built in scripts/
|
|
# Carefully list dependencies so we do not try to build scripts twice
|
|
# in parallel
|
|
PHONY += scripts
|
|
scripts: scripts_basic include/config/auto.conf
|
|
$(Q)$(MAKE) $(build)=$(@)
|
|
|
|
# Objects we will link into vmlinux / subdirs we need to visit
|
|
init-y := init/
|
|
drivers-y := drivers/ sound/ firmware/
|
|
net-y := net/
|
|
libs-y := lib/
|
|
core-y := usr/
|
|
endif # KBUILD_EXTMOD
|
|
|
|
ifeq ($(dot-config),1)
|
|
# Read in config
|
|
-include include/config/auto.conf
|
|
|
|
ifeq ($(KBUILD_EXTMOD),)
|
|
# Read in dependencies to all Kconfig* files, make sure to run
|
|
# oldconfig if changes are detected.
|
|
-include include/config/auto.conf.cmd
|
|
|
|
# To avoid any implicit rule to kick in, define an empty command
|
|
$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
|
|
|
|
# If .config is newer than include/config/auto.conf, someone tinkered
|
|
# with it and forgot to run make oldconfig.
|
|
# if auto.conf.cmd is missing then we are probably in a cleaned tree so
|
|
# we execute the config step to be sure to catch updated Kconfig files
|
|
include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
|
|
$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
|
|
else
|
|
# external modules needs include/linux/autoconf.h and include/config/auto.conf
|
|
# but do not care if they are up-to-date. Use auto.conf to trigger the test
|
|
PHONY += include/config/auto.conf
|
|
|
|
include/config/auto.conf:
|
|
$(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
|
|
echo; \
|
|
echo " ERROR: Kernel configuration is invalid."; \
|
|
echo " include/linux/autoconf.h or $@ are missing."; \
|
|
echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
|
|
echo; \
|
|
/bin/false)
|
|
|
|
endif # KBUILD_EXTMOD
|
|
|
|
else
|
|
# Dummy target needed, because used as prerequisite
|
|
include/config/auto.conf: ;
|
|
endif # $(dot-config)
|
|
|
|
# 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 overridden in the arch makefile
|
|
all: vmlinux
|
|
|
|
ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
|
|
KBUILD_CFLAGS += -Os
|
|
else
|
|
KBUILD_CFLAGS += -O2
|
|
endif
|
|
|
|
include $(srctree)/arch/$(SRCARCH)/Makefile
|
|
|
|
ifneq ($(CONFIG_FRAME_WARN),0)
|
|
KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
|
|
endif
|
|
|
|
# Force gcc to behave correct even for buggy distributions
|
|
ifndef CONFIG_CC_STACKPROTECTOR
|
|
KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
|
|
endif
|
|
|
|
ifdef CONFIG_FRAME_POINTER
|
|
KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
|
|
else
|
|
KBUILD_CFLAGS += -fomit-frame-pointer
|
|
endif
|
|
|
|
ifdef CONFIG_DEBUG_INFO
|
|
KBUILD_CFLAGS += -g
|
|
KBUILD_AFLAGS += -gdwarf-2
|
|
endif
|
|
|
|
ifdef CONFIG_FUNCTION_TRACER
|
|
KBUILD_CFLAGS += -pg
|
|
endif
|
|
|
|
# We trigger additional mismatches with less inlining
|
|
ifdef CONFIG_DEBUG_SECTION_MISMATCH
|
|
KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
|
|
endif
|
|
|
|
# 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
|
|
KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
|
|
|
|
# disable pointer signed / unsigned warnings in gcc 4.0
|
|
KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
|
|
|
|
# disable invalid "can't wrap" optimizations for signed / pointers
|
|
KBUILD_CFLAGS += $(call cc-option,-fwrapv)
|
|
|
|
# revert to pre-gcc-4.4 behaviour of .eh_frame
|
|
KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
|
|
|
|
# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
|
|
# But warn user when we do so
|
|
warn-assign = \
|
|
$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
|
|
|
|
ifneq ($(KCPPFLAGS),)
|
|
$(call warn-assign,CPPFLAGS)
|
|
KBUILD_CPPFLAGS += $(KCPPFLAGS)
|
|
endif
|
|
ifneq ($(KAFLAGS),)
|
|
$(call warn-assign,AFLAGS)
|
|
KBUILD_AFLAGS += $(KAFLAGS)
|
|
endif
|
|
ifneq ($(KCFLAGS),)
|
|
$(call warn-assign,CFLAGS)
|
|
KBUILD_CFLAGS += $(KCFLAGS)
|
|
endif
|
|
|
|
# Use --build-id when available.
|
|
LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
|
|
$(call ld-option, -Wl$(comma)--build-id,))
|
|
LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
|
|
LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
|
|
|
|
ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
|
|
LDFLAGS_vmlinux += -X
|
|
endif
|
|
|
|
# Default kernel image to build when no specific target is given.
|
|
# KBUILD_IMAGE may be overruled on the command line 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
|
|
|
|
#
|
|
# 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 argument can be passed to make if needed.
|
|
#
|
|
|
|
MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
|
|
export MODLIB
|
|
|
|
#
|
|
# INSTALL_MOD_STRIP, if defined, will cause modules to be
|
|
# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
|
|
# the default option --strip-debug will be used. Otherwise,
|
|
# INSTALL_MOD_STRIP will used as the options to the strip command.
|
|
|
|
ifdef INSTALL_MOD_STRIP
|
|
ifeq ($(INSTALL_MOD_STRIP),1)
|
|
mod_strip_cmd = $(STRIP) --strip-debug
|
|
else
|
|
mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
|
|
endif # INSTALL_MOD_STRIP=1
|
|
else
|
|
mod_strip_cmd = true
|
|
endif # INSTALL_MOD_STRIP
|
|
export mod_strip_cmd
|
|
|
|
|
|
ifeq ($(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 built 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) $(vmlinux-main)
|
|
vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
|
|
export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
|
|
|
|
# Rule to link vmlinux - also used during CONFIG_KALLSYMS
|
|
# May be overridden by arch/$(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) $(vmlinux-main) vmlinux.o FORCE ,$^)
|
|
|
|
# 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
|
|
|
|
# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
|
|
# relevant sections renamed as per the linker script.
|
|
quiet_cmd_vmlinux-modpost = LD $@
|
|
cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
|
|
$(vmlinux-init) --start-group $(vmlinux-main) --end-group \
|
|
$(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
|
|
define rule_vmlinux-modpost
|
|
:
|
|
+$(call cmd,vmlinux-modpost)
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
|
|
$(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
|
|
endef
|
|
|
|
# vmlinux image - including updated kernel symbols
|
|
vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
|
|
ifdef CONFIG_HEADERS_CHECK
|
|
$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
|
|
endif
|
|
ifdef CONFIG_SAMPLES
|
|
$(Q)$(MAKE) $(build)=samples
|
|
endif
|
|
ifdef CONFIG_BUILD_DOCSRC
|
|
$(Q)$(MAKE) $(build)=Documentation
|
|
endif
|
|
$(call vmlinux-modpost)
|
|
$(call if_changed_rule,vmlinux__)
|
|
$(Q)rm -f .old_version
|
|
|
|
# build vmlinux.o first to catch section mismatch errors early
|
|
ifdef CONFIG_KALLSYMS
|
|
.tmp_vmlinux1: vmlinux.o
|
|
endif
|
|
|
|
modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
|
|
vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
|
|
$(call if_changed_rule,vmlinux-modpost)
|
|
|
|
# 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) $(build)=$@
|
|
|
|
# Build the kernel release string
|
|
#
|
|
# The KERNELRELEASE value built here is stored in the file
|
|
# include/config/kernel.release, and is used when executing several
|
|
# make targets, such as "make install" or "make modules_install."
|
|
#
|
|
# The eventual kernel release string consists of the following fields,
|
|
# shown in a hierarchical format to show how smaller parts are concatenated
|
|
# to form the larger and final value, with values coming from places like
|
|
# the Makefile, kernel config options, make command line options and/or
|
|
# SCM tag information.
|
|
#
|
|
# $(KERNELVERSION)
|
|
# $(VERSION) eg, 2
|
|
# $(PATCHLEVEL) eg, 6
|
|
# $(SUBLEVEL) eg, 18
|
|
# $(EXTRAVERSION) eg, -rc6
|
|
# $(localver-full)
|
|
# $(localver)
|
|
# localversion* (files without backups, containing '~')
|
|
# $(CONFIG_LOCALVERSION) (from kernel config setting)
|
|
# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
|
|
# ./scripts/setlocalversion (SCM tag, if one exists)
|
|
# $(LOCALVERSION) (from make command line if provided)
|
|
#
|
|
# Note how the final $(localver-auto) string is included *only* if the
|
|
# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
|
|
# moment, only git is supported but other SCMs can edit the script
|
|
# scripts/setlocalversion and add the appropriate checks as needed.
|
|
|
|
pattern = ".*/localversion[^~]*"
|
|
string = $(shell cat /dev/null \
|
|
`find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
|
|
|
|
localver = $(subst $(space),, $(string) \
|
|
$(patsubst "%",%,$(CONFIG_LOCALVERSION)))
|
|
|
|
# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
|
|
# and if the SCM is know a tag from the SCM is appended.
|
|
# The appended tag is determined by the SCM used.
|
|
#
|
|
# .scmversion is used when generating rpm packages so we do not loose
|
|
# the version information from the SCM when we do the build of the kernel
|
|
# from the copied source
|
|
ifdef CONFIG_LOCALVERSION_AUTO
|
|
|
|
ifeq ($(wildcard .scmversion),)
|
|
_localver-auto = $(shell $(CONFIG_SHELL) \
|
|
$(srctree)/scripts/setlocalversion $(srctree))
|
|
else
|
|
_localver-auto = $(shell cat .scmversion 2> /dev/null)
|
|
endif
|
|
|
|
localver-auto = $(LOCALVERSION)$(_localver-auto)
|
|
endif
|
|
|
|
localver-full = $(localver)$(localver-auto)
|
|
|
|
# Store (new) KERNELRELASE string in include/config/kernel.release
|
|
kernelrelease = $(KERNELVERSION)$(localver-full)
|
|
include/config/kernel.release: include/config/auto.conf FORCE
|
|
$(Q)rm -f $@
|
|
$(Q)echo $(kernelrelease) > $@
|
|
|
|
|
|
# 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
|
|
|
|
# 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 $(srctree)
|
|
# 2) Create the include2 directory, used for the second asm symlink
|
|
prepare3: include/config/kernel.release
|
|
ifneq ($(KBUILD_SRC),)
|
|
@$(kecho) ' Using $(srctree) as source for kernel'
|
|
$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/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; \
|
|
ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
|
|
fi
|
|
endif
|
|
|
|
# prepare2 creates a makefile if using a separate output directory
|
|
prepare2: prepare3 outputmakefile
|
|
|
|
prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
|
|
include/asm include/config/auto.conf
|
|
$(cmd_crmodverdir)
|
|
|
|
archprepare: prepare1 scripts_basic
|
|
|
|
prepare0: archprepare FORCE
|
|
$(Q)$(MAKE) $(build)=.
|
|
$(Q)$(MAKE) $(build)=. missing-syscalls
|
|
|
|
# All the preparing..
|
|
prepare: prepare0
|
|
|
|
# Leave this as default for preprocessing vmlinux.lds.S, which is now
|
|
# done in arch/$(ARCH)/kernel/Makefile
|
|
|
|
export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
|
|
|
|
# The asm symlink changes when $(ARCH) changes.
|
|
# Detect this and ask user to run make mrproper
|
|
# If asm is a stale symlink (point to dir that does not exist) remove it
|
|
define check-symlink
|
|
set -e; \
|
|
if [ -L include/asm ]; then \
|
|
asmlink=`readlink include/asm | cut -d '-' -f 2`; \
|
|
if [ "$$asmlink" != "$(SRCARCH)" ]; then \
|
|
echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
|
|
echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
|
|
exit 1; \
|
|
fi; \
|
|
test -e $$asmlink || rm include/asm; \
|
|
elif [ -d include/asm ]; then \
|
|
echo "ERROR: $@ is a directory but a symlink was expected";\
|
|
exit 1; \
|
|
fi
|
|
endef
|
|
|
|
# We create the target directory of the symlink if it does
|
|
# not exist so the test in check-symlink works and we have a
|
|
# directory for generated filesas used by some architectures.
|
|
define create-symlink
|
|
if [ ! -L include/asm ]; then \
|
|
$(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
|
|
if [ ! -d include/asm-$(SRCARCH) ]; then \
|
|
mkdir -p include/asm-$(SRCARCH); \
|
|
fi; \
|
|
ln -fsn asm-$(SRCARCH) $@; \
|
|
fi
|
|
endef
|
|
|
|
include/asm: FORCE
|
|
$(Q)$(check-symlink)
|
|
$(Q)$(create-symlink)
|
|
|
|
# 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_utsrelease.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)\";)
|
|
endef
|
|
|
|
define filechk_version.h
|
|
(echo \#define LINUX_VERSION_CODE $(shell \
|
|
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)
|
|
|
|
include/linux/utsrelease.h: include/config/kernel.release FORCE
|
|
$(call filechk,utsrelease.h)
|
|
|
|
PHONY += headerdep
|
|
headerdep:
|
|
$(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
|
|
|
|
# ---------------------------------------------------------------------------
|
|
|
|
PHONY += depend dep
|
|
depend dep:
|
|
@echo '*** Warning: make $@ is unnecessary now.'
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Firmware install
|
|
INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
|
|
export INSTALL_FW_PATH
|
|
|
|
PHONY += firmware_install
|
|
firmware_install: FORCE
|
|
@mkdir -p $(objtree)/firmware
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Kernel headers
|
|
|
|
#Default location for installed headers
|
|
export INSTALL_HDR_PATH = $(objtree)/usr
|
|
|
|
hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
|
|
# Find out where the Kbuild file is located to support
|
|
# arch/$(ARCH)/include/asm
|
|
hdr-dir = $(strip \
|
|
$(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
|
|
arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
|
|
|
|
# If we do an all arch process set dst to asm-$(hdr-arch)
|
|
hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
|
|
|
|
PHONY += __headers
|
|
__headers: include/linux/version.h scripts_basic FORCE
|
|
$(Q)$(MAKE) $(build)=scripts scripts/unifdef
|
|
|
|
PHONY += headers_install_all
|
|
headers_install_all:
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
|
|
|
|
PHONY += headers_install
|
|
headers_install: __headers
|
|
$(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
|
|
$(error Headers not exportable for the $(SRCARCH) architecture))
|
|
$(Q)$(MAKE) $(hdr-inst)=include
|
|
$(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
|
|
|
|
PHONY += headers_check_all
|
|
headers_check_all: headers_install_all
|
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
|
|
|
|
PHONY += headers_check
|
|
headers_check: headers_install
|
|
$(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
|
|
$(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Modules
|
|
|
|
ifdef CONFIG_MODULES
|
|
|
|
# By default, build modules as well
|
|
|
|
all: modules
|
|
|
|
# Build modules
|
|
#
|
|
# A module can be listed more than once in obj-m resulting in
|
|
# duplicate lines in modules.order files. Those are removed
|
|
# using awk while concatenating to the final file.
|
|
|
|
PHONY += modules
|
|
modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
|
|
$(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
|
|
@$(kecho) ' Building modules, stage 2.';
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
|
|
|
|
|
|
# Target to prepare building external modules
|
|
PHONY += modules_prepare
|
|
modules_prepare: prepare scripts
|
|
|
|
# Target to install modules
|
|
PHONY += modules_install
|
|
modules_install: _modinst_ _modinst_post
|
|
|
|
PHONY += _modinst_
|
|
_modinst_:
|
|
@if [ -z "`$(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
|
|
@cp -f $(objtree)/modules.order $(MODLIB)/
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
|
|
|
|
# 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.
|
|
PHONY += _modinst_post
|
|
_modinst_post: _modinst_
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
|
|
$(call cmd,depmod)
|
|
|
|
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 usr/include include/generated
|
|
MRPROPER_FILES += .config .config.old include/asm .version .old_version \
|
|
include/linux/autoconf.h include/linux/version.h \
|
|
include/linux/utsrelease.h \
|
|
include/linux/bounds.h include/asm*/asm-offsets.h \
|
|
Module.symvers Module.markers 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) Documentation)
|
|
|
|
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) \
|
|
\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
|
|
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
|
|
-o -name '*.symtypes' -o -name 'modules.order' \
|
|
-o -name 'Module.markers' -o -name '.tmp_*.o.*' \
|
|
-o -name '*.gcno' \) -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
|
|
|
|
%pkg: include/config/kernel.release FORCE
|
|
$(Q)$(MAKE) $(build)=$(package-dir) $@
|
|
rpm: include/config/kernel.release FORCE
|
|
$(Q)$(MAKE) $(build)=$(package-dir) $@
|
|
|
|
|
|
# Brief documentation of the typical targets used
|
|
# ---------------------------------------------------------------------------
|
|
|
|
boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
|
|
boards := $(notdir $(boards))
|
|
board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
|
|
board-dirs := $(sort $(notdir $(board-dirs:/=)))
|
|
|
|
help:
|
|
@echo 'Cleaning targets:'
|
|
@echo ' clean - Remove most generated files but keep the config and'
|
|
@echo ' enough build support to build external modules'
|
|
@echo ' mrproper - Remove all generated files + config + various backup files'
|
|
@echo ' distclean - mrproper + remove editor backup and patch files'
|
|
@echo ''
|
|
@echo 'Configuration targets:'
|
|
@$(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 to INSTALL_MOD_PATH (default: /)'
|
|
@echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
|
|
@echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
|
|
@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 ' modules_prepare - Set up for building external modules'
|
|
@echo ' tags/TAGS - Generate tags file for editors'
|
|
@echo ' cscope - Generate cscope index'
|
|
@echo ' kernelrelease - Output the release version string'
|
|
@echo ' kernelversion - Output the version stored in Makefile'
|
|
@echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
|
|
echo ' (default: $(INSTALL_HDR_PATH))'; \
|
|
echo ''
|
|
@echo 'Static analysers'
|
|
@echo ' checkstack - Generate a list of stack hogs'
|
|
@echo ' namespacecheck - Name space analysis on compiled kernel'
|
|
@echo ' versioncheck - Sanity check on version.h usage'
|
|
@echo ' includecheck - Check for duplicate included header files'
|
|
@echo ' export_report - List the usages of all exported symbols'
|
|
@echo ' headers_check - Sanity check on exported headers'
|
|
@echo ' headerdep - Detect inclusion cycles in headers'; \
|
|
echo ''
|
|
@echo 'Kernel packaging:'
|
|
@$(MAKE) $(build)=$(package-dir) help
|
|
@echo ''
|
|
@echo 'Documentation targets:'
|
|
@$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
|
|
@echo ''
|
|
@echo 'Architecture specific targets ($(SRCARCH)):'
|
|
@$(if $(archhelp),$(archhelp),\
|
|
echo ' No architecture specific help defined for $(SRCARCH)')
|
|
@echo ''
|
|
@$(if $(boards), \
|
|
$(foreach b, $(boards), \
|
|
printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
|
|
echo '')
|
|
@$(if $(board-dirs), \
|
|
$(foreach b, $(board-dirs), \
|
|
printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
|
|
printf " %-16s - Show all of the above\\n" help-boards; \
|
|
echo '')
|
|
|
|
@echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
|
|
@echo ' make V=2 [targets] 2 => give reason for rebuild of target'
|
|
@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 by default)'
|
|
@echo ' make C=2 [targets] Force check of all c source with $$CHECK'
|
|
@echo ''
|
|
@echo 'Execute "make" or "make all" to build all targets marked with [*] '
|
|
@echo 'For further info see the ./README file'
|
|
|
|
|
|
help-board-dirs := $(addprefix help-,$(board-dirs))
|
|
|
|
help-boards: $(help-board-dirs)
|
|
|
|
boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
|
|
|
|
$(help-board-dirs): help-%:
|
|
@echo 'Architecture specific targets ($(SRCARCH) $*):'
|
|
@$(if $(boards-per-dir), \
|
|
$(foreach b, $(boards-per-dir), \
|
|
printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
|
|
echo '')
|
|
|
|
|
|
# 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 built in the module directory
|
|
# Assumes install directory is already created
|
|
|
|
# We are always building modules
|
|
KBUILD_MODULES := 1
|
|
PHONY += crmodverdir
|
|
crmodverdir:
|
|
$(cmd_crmodverdir)
|
|
|
|
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: $(module-dirs)
|
|
@$(kecho) ' Building modules, stage 2.';
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
|
|
|
|
PHONY += modules_install
|
|
modules_install: _emodinst_ _emodinst_post
|
|
|
|
install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
|
|
PHONY += _emodinst_
|
|
_emodinst_:
|
|
$(Q)mkdir -p $(MODLIB)/$(install-dir)
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
|
|
|
|
PHONY += _emodinst_post
|
|
_emodinst_post: _emodinst_
|
|
$(call cmd,depmod)
|
|
|
|
clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
|
|
|
|
PHONY += $(clean-dirs) clean
|
|
$(clean-dirs):
|
|
$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
|
|
|
|
clean: rm-dirs := $(MODVERDIR)
|
|
clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
|
|
$(KBUILD_EXTMOD)/Module.markers \
|
|
$(KBUILD_EXTMOD)/modules.order
|
|
clean: $(clean-dirs)
|
|
$(call cmd,rmdirs)
|
|
$(call cmd,rmfiles)
|
|
@find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
|
|
\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
|
|
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
|
|
-o -name '*.gcno' \) -type f -print | xargs rm -f
|
|
|
|
help:
|
|
@echo ' Building external modules.'
|
|
@echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
|
|
@echo ''
|
|
@echo ' modules - default target, build the module(s)'
|
|
@echo ' modules_install - install the module'
|
|
@echo ' clean - remove generated files in module directory only'
|
|
@echo ''
|
|
|
|
# Dummies...
|
|
PHONY += prepare scripts
|
|
prepare: ;
|
|
scripts: ;
|
|
endif # KBUILD_EXTMOD
|
|
|
|
# Generate tags for editors
|
|
# ---------------------------------------------------------------------------
|
|
quiet_cmd_tags = GEN $@
|
|
cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
|
|
|
|
tags TAGS cscope: FORCE
|
|
$(call cmd,tags)
|
|
|
|
# Scripts to check various things for consistency
|
|
# ---------------------------------------------------------------------------
|
|
|
|
includecheck:
|
|
find * $(RCS_FIND_IGNORE) \
|
|
-name '*.[hcS]' -type f -print | sort \
|
|
| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
|
|
|
|
versioncheck:
|
|
find * $(RCS_FIND_IGNORE) \
|
|
-name '*.[hcS]' -type f -print | sort \
|
|
| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
|
|
|
|
namespacecheck:
|
|
$(PERL) $(srctree)/scripts/namespace.pl
|
|
|
|
export_report:
|
|
$(PERL) $(srctree)/scripts/export_report.pl
|
|
|
|
endif #ifeq ($(config-targets),1)
|
|
endif #ifeq ($(mixed-targets),1)
|
|
|
|
PHONY += checkstack kernelrelease kernelversion
|
|
|
|
# UML needs a little special treatment here. It wants to use the host
|
|
# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
|
|
# else wants $(ARCH), including people doing cross-builds, which means
|
|
# that $(SUBARCH) doesn't work here.
|
|
ifeq ($(ARCH), um)
|
|
CHECKSTACK_ARCH := $(SUBARCH)
|
|
else
|
|
CHECKSTACK_ARCH := $(ARCH)
|
|
endif
|
|
checkstack:
|
|
$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
|
|
$(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
|
|
|
|
kernelrelease:
|
|
$(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
|
|
$(error kernelrelease not valid - run 'make prepare' to update it))
|
|
kernelversion:
|
|
@echo $(KERNELVERSION)
|
|
|
|
# Single targets
|
|
# ---------------------------------------------------------------------------
|
|
# Single targets are compatible with:
|
|
# - build with mixed source and output
|
|
# - build with separate output dir 'make O=...'
|
|
# - external modules
|
|
#
|
|
# target-dir => where to store outputfile
|
|
# build-dir => directory in kernel source tree to use
|
|
|
|
ifeq ($(KBUILD_EXTMOD),)
|
|
build-dir = $(patsubst %/,%,$(dir $@))
|
|
target-dir = $(dir $@)
|
|
else
|
|
zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
|
|
build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
|
|
target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
|
|
endif
|
|
|
|
%.s: %.c prepare scripts FORCE
|
|
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
|
%.i: %.c prepare scripts FORCE
|
|
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
|
%.o: %.c prepare scripts FORCE
|
|
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
|
%.lst: %.c prepare scripts FORCE
|
|
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
|
%.s: %.S prepare scripts FORCE
|
|
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
|
%.o: %.S prepare scripts FORCE
|
|
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
|
%.symtypes: %.c prepare scripts FORCE
|
|
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
|
|
|
# Modules
|
|
/: prepare scripts FORCE
|
|
$(cmd_crmodverdir)
|
|
$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
|
|
$(build)=$(build-dir)
|
|
%/: prepare scripts FORCE
|
|
$(cmd_crmodverdir)
|
|
$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
|
|
$(build)=$(build-dir)
|
|
%.ko: prepare scripts FORCE
|
|
$(cmd_crmodverdir)
|
|
$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
|
|
$(build)=$(build-dir) $(@:.ko=.o)
|
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
|
|
|
|
# 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)
|
|
|
|
# Run depmod only if 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) ) \
|
|
$(KERNELRELEASE); \
|
|
fi
|
|
|
|
# Create temporary dir for module support files
|
|
# clean it up only when building all modules
|
|
cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
|
|
$(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
|
|
|
|
a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
|
|
$(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
|
|
$(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).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
|
|
|
|
PHONY += FORCE
|
|
FORCE:
|
|
|
|
# Declare the contents of the .PHONY variable as phony. We keep that
|
|
# information in a variable so we can use it in if_changed and friends.
|
|
.PHONY: $(PHONY)
|