xref: /openbmc/linux/Makefile (revision 18aecc2b)
11da177e4SLinus TorvaldsVERSION = 2
21da177e4SLinus TorvaldsPATCHLEVEL = 6
30ce790e7SLinus TorvaldsSUBLEVEL = 39
48e10cd74SLinus TorvaldsEXTRAVERSION = -rc5
5cd07202cSLinus TorvaldsNAME = Flesh-Eating Bats with Fangs
61da177e4SLinus Torvalds
71da177e4SLinus Torvalds# *DOCUMENTATION*
81da177e4SLinus Torvalds# To see a list of typical targets execute "make help"
91da177e4SLinus Torvalds# More info can be located in ./README
101da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not
111da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file.
121da177e4SLinus Torvalds
1315964864SOleg Verych# Do not:
1415964864SOleg Verych# o  use make's built-in rules and variables
15d384e35aSLinus Nilsson#    (this increases performance and avoids hard-to-debug behaviour);
1615964864SOleg Verych# o  print "Entering directory ...";
1715964864SOleg VerychMAKEFLAGS += -rR --no-print-directory
181da177e4SLinus Torvalds
19c051346bSH. Peter Anvin# Avoid funny character set dependencies
2006b5dc64SH. Peter Anvinunexport LC_ALL
21c051346bSH. Peter AnvinLC_COLLATE=C
22c051346bSH. Peter AnvinLC_NUMERIC=C
2307105202SMichal Marekexport LC_COLLATE LC_NUMERIC
24c051346bSH. Peter Anvin
251da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking
261da177e4SLinus Torvalds# to get the ordering right.
271da177e4SLinus Torvalds#
281da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in
291da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on
301da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often
311da177e4SLinus Torvalds# unavoidable when linking the built-in.o targets which finally
321da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and
331da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir
341da177e4SLinus Torvalds# is now up to date.
351da177e4SLinus Torvalds#
361da177e4SLinus Torvalds# The only cases where we need to modify files which have global
371da177e4SLinus Torvalds# effects are thus separated out and done before the recursive
381da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the
391da177e4SLinus Torvalds# prepare rule.
401da177e4SLinus Torvalds
411da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
421da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
431da177e4SLinus Torvalds
441da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
451da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
461da177e4SLinus Torvaldsendif
471da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
481da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
491da177e4SLinus Torvaldsendif
501da177e4SLinus Torvalds
511c7bafe7SRobert P. J. Day# Call a source code checker (by default, "sparse") as part of the
521c7bafe7SRobert P. J. Day# C compilation.
531c7bafe7SRobert P. J. Day#
541c7bafe7SRobert P. J. Day# Use 'make C=1' to enable checking of only re-compiled files.
551c7bafe7SRobert P. J. Day# Use 'make C=2' to enable checking of *all* source files, regardless
561c7bafe7SRobert P. J. Day# of whether they are re-compiled or not.
571c7bafe7SRobert P. J. Day#
581c7bafe7SRobert P. J. Day# See the file "Documentation/sparse.txt" for more details, including
591c7bafe7SRobert P. J. Day# where to get the "sparse" utility.
601da177e4SLinus Torvalds
611da177e4SLinus Torvaldsifeq ("$(origin C)", "command line")
621da177e4SLinus Torvalds  KBUILD_CHECKSRC = $(C)
631da177e4SLinus Torvaldsendif
641da177e4SLinus Torvaldsifndef KBUILD_CHECKSRC
651da177e4SLinus Torvalds  KBUILD_CHECKSRC = 0
661da177e4SLinus Torvaldsendif
671da177e4SLinus Torvalds
681da177e4SLinus Torvalds# Use make M=dir to specify directory of external module to build
691da177e4SLinus Torvalds# Old syntax make ... SUBDIRS=$PWD is still supported
701da177e4SLinus Torvalds# Setting the environment variable KBUILD_EXTMOD take precedence
711da177e4SLinus Torvaldsifdef SUBDIRS
721da177e4SLinus Torvalds  KBUILD_EXTMOD ?= $(SUBDIRS)
731da177e4SLinus Torvaldsendif
74b8b0618cSCheng Renquan
751da177e4SLinus Torvaldsifeq ("$(origin M)", "command line")
761da177e4SLinus Torvalds  KBUILD_EXTMOD := $(M)
771da177e4SLinus Torvaldsendif
781da177e4SLinus Torvalds
791da177e4SLinus Torvalds# kbuild supports saving output files in a separate directory.
801da177e4SLinus Torvalds# To locate output files in a separate directory two syntaxes are supported.
811da177e4SLinus Torvalds# In both cases the working directory must be the root of the kernel src.
821da177e4SLinus Torvalds# 1) O=
831da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
841da177e4SLinus Torvalds#
851da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
861da177e4SLinus Torvalds# Set the environment variable KBUILD_OUTPUT to point to the directory
871da177e4SLinus Torvalds# where the output files shall be placed.
881da177e4SLinus Torvalds# export KBUILD_OUTPUT=dir/to/store/output/files/
891da177e4SLinus Torvalds# make
901da177e4SLinus Torvalds#
911da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
921da177e4SLinus Torvalds# variable.
931da177e4SLinus Torvalds
941da177e4SLinus Torvalds
951da177e4SLinus Torvalds# KBUILD_SRC is set on invocation of make in OBJ directory
961da177e4SLinus Torvalds# KBUILD_SRC is not intended to be used by the regular user (for now)
971da177e4SLinus Torvaldsifeq ($(KBUILD_SRC),)
981da177e4SLinus Torvalds
991da177e4SLinus Torvalds# OK, Make called in directory where kernel src resides
1001da177e4SLinus Torvalds# Do we want to locate output files in a separate directory?
1011da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
1021da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
1031da177e4SLinus Torvaldsendif
1041da177e4SLinus Torvalds
1054a5838adSBorislav Petkovifeq ("$(origin W)", "command line")
1064a5838adSBorislav Petkov  export KBUILD_ENABLE_EXTRA_GCC_CHECKS := 1
1074a5838adSBorislav Petkovendif
1084a5838adSBorislav Petkov
1091da177e4SLinus Torvalds# That's our default target when none is given on the command line
1104f193362SPaul SmithPHONY := _all
1111da177e4SLinus Torvalds_all:
1121da177e4SLinus Torvalds
1131cacc9abSSam Ravnborg# Cancel implicit rules on top Makefile
1141cacc9abSSam Ravnborg$(CURDIR)/Makefile Makefile: ;
1151cacc9abSSam Ravnborg
1161da177e4SLinus Torvaldsifneq ($(KBUILD_OUTPUT),)
1171da177e4SLinus Torvalds# Invoke a second make in the output directory, passing relevant variables
1181da177e4SLinus Torvalds# check that the output directory actually exists
1191da177e4SLinus Torvaldssaved-output := $(KBUILD_OUTPUT)
1201da177e4SLinus TorvaldsKBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
1211da177e4SLinus Torvalds$(if $(KBUILD_OUTPUT),, \
1221da177e4SLinus Torvalds     $(error output directory "$(saved-output)" does not exist))
1231da177e4SLinus Torvalds
1240b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make
1250b35786dSMilton Miller
1261cacc9abSSam Ravnborg$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
1270b35786dSMilton Miller	$(Q)@:
1280b35786dSMilton Miller
1290b35786dSMilton Millersub-make: FORCE
1301da177e4SLinus Torvalds	$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
13123a45e2cSSam Ravnborg	KBUILD_SRC=$(CURDIR) \
1320b35786dSMilton Miller	KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
1330b35786dSMilton Miller	$(filter-out _all sub-make,$(MAKECMDGOALS))
1341da177e4SLinus Torvalds
1351da177e4SLinus Torvalds# Leave processing to above invocation of make
1361da177e4SLinus Torvaldsskip-makefile := 1
1371da177e4SLinus Torvaldsendif # ifneq ($(KBUILD_OUTPUT),)
1381da177e4SLinus Torvaldsendif # ifeq ($(KBUILD_SRC),)
1391da177e4SLinus Torvalds
1401da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
1411da177e4SLinus Torvaldsifeq ($(skip-makefile),)
1421da177e4SLinus Torvalds
1431da177e4SLinus Torvalds# If building an external module we do not care about the all: rule
1441da177e4SLinus Torvalds# but instead _all depend on modules
1454f193362SPaul SmithPHONY += all
1461da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1471da177e4SLinus Torvalds_all: all
1481da177e4SLinus Torvaldselse
1491da177e4SLinus Torvalds_all: modules
1501da177e4SLinus Torvaldsendif
1511da177e4SLinus Torvalds
1521da177e4SLinus Torvaldssrctree		:= $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
1531da177e4SLinus Torvaldsobjtree		:= $(CURDIR)
1541da177e4SLinus Torvaldssrc		:= $(srctree)
1551da177e4SLinus Torvaldsobj		:= $(objtree)
1561da177e4SLinus Torvalds
1570f558c33SMattia DongiliVPATH		:= $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
1581da177e4SLinus Torvalds
15911294235SAmerigo Wangexport srctree objtree VPATH
1601da177e4SLinus Torvalds
1611da177e4SLinus Torvalds
1621da177e4SLinus Torvalds# SUBARCH tells the usermode build what the underlying arch is.  That is set
1631da177e4SLinus Torvalds# first, and if a usermode build is happening, the "ARCH=um" on the command
1641da177e4SLinus Torvalds# line overrides the setting of ARCH below.  If a native build is happening,
1651da177e4SLinus Torvalds# then ARCH is assigned, getting whatever value it gets normally, and
1661da177e4SLinus Torvalds# SUBARCH is subsequently ignored.
1671da177e4SLinus Torvalds
1681da177e4SLinus TorvaldsSUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
1691da177e4SLinus Torvalds				  -e s/arm.*/arm/ -e s/sa110/arm/ \
17039990b5eSLinus Torvalds				  -e s/s390x/s390/ -e s/parisc64/parisc/ \
171236b1957SPaul Mundt				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
1723cc000b5SPaul Mundt				  -e s/sh[234].*/sh/ )
1731da177e4SLinus Torvalds
1741da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
1751da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1761da177e4SLinus Torvalds#
1771da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
1781da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
1791da177e4SLinus Torvalds# ARCH can be set during invocation of make:
1801da177e4SLinus Torvalds# make ARCH=ia64
1811da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
1821da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
1831da177e4SLinus Torvalds
1841da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
1851da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
1861da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
1871da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
1881da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
1891da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
19084336466SRoland McGrath# A third alternative is to store a setting in .config so that plain
19184336466SRoland McGrath# "make" in the configured kernel build directory always uses that.
1921da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
1931da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
1944ce6efedSSam Ravnborgexport KBUILD_BUILDHOST := $(SUBARCH)
1952331d1a6SSam RavnborgARCH		?= $(SUBARCH)
19684336466SRoland McGrathCROSS_COMPILE	?= $(CONFIG_CROSS_COMPILE:"%"=%)
1971da177e4SLinus Torvalds
1981da177e4SLinus Torvalds# Architecture as present in compile.h
1991da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
2006752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
2011da177e4SLinus Torvalds
202d746d647SSam Ravnborg# Additional ARCH settings for x86
203d746d647SSam Ravnborgifeq ($(ARCH),i386)
204d746d647SSam Ravnborg        SRCARCH := x86
205d746d647SSam Ravnborgendif
206d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
207d746d647SSam Ravnborg        SRCARCH := x86
208d746d647SSam Ravnborgendif
20974b469f2SSam Ravnborg
2105e538790SSam Ravnborg# Additional ARCH settings for sparc
211e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
212e69f58c0SNamhyung Kim       SRCARCH := sparc
213e69f58c0SNamhyung Kimendif
214a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
2155e538790SSam Ravnborg       SRCARCH := sparc
216a439fe51SSam Ravnborgendif
2172fb9b1bdSSam Ravnborg
2183cc000b5SPaul Mundt# Additional ARCH settings for sh
2193cc000b5SPaul Mundtifeq ($(ARCH),sh64)
2203cc000b5SPaul Mundt       SRCARCH := sh
2213cc000b5SPaul Mundtendif
2223cc000b5SPaul Mundt
223*18aecc2bSChris Metcalf# Additional ARCH settings for tile
224*18aecc2bSChris Metcalfifeq ($(ARCH),tilegx)
225*18aecc2bSChris Metcalf       SRCARCH := tile
226*18aecc2bSChris Metcalfendif
227*18aecc2bSChris Metcalf
2285e538790SSam Ravnborg# Where to locate arch specific headers
2295e538790SSam Ravnborghdr-arch  := $(SRCARCH)
2305e538790SSam Ravnborg
23149148020SSam Ravnborgifeq ($(ARCH),m68knommu)
23249148020SSam Ravnborg       hdr-arch  := m68k
23349148020SSam Ravnborgendif
23449148020SSam Ravnborg
23514cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
23641263fc6SBen Gardinerexport KCONFIG_CONFIG
23714cdd3c4SRoman Zippel
2381da177e4SLinus Torvalds# SHELL used by kbuild
2391da177e4SLinus TorvaldsCONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
2401da177e4SLinus Torvalds	  else if [ -x /bin/bash ]; then echo /bin/bash; \
2411da177e4SLinus Torvalds	  else echo sh; fi ; fi)
2421da177e4SLinus Torvalds
2431da177e4SLinus TorvaldsHOSTCC       = gcc
2441da177e4SLinus TorvaldsHOSTCXX      = g++
24525583d4bSJosh TriplettHOSTCFLAGS   = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
2461da177e4SLinus TorvaldsHOSTCXXFLAGS = -O2
2471da177e4SLinus Torvalds
2481da177e4SLinus Torvalds# Decide whether to build built-in, modular, or both.
2491da177e4SLinus Torvalds# Normally, just do built-in.
2501da177e4SLinus Torvalds
2511da177e4SLinus TorvaldsKBUILD_MODULES :=
2521da177e4SLinus TorvaldsKBUILD_BUILTIN := 1
2531da177e4SLinus Torvalds
2541da177e4SLinus Torvalds#	If we have only "make modules", don't compile built-in objects.
2551da177e4SLinus Torvalds#	When we're building modules with modversions, we need to consider
2561da177e4SLinus Torvalds#	the built-in objects during the descend as well, in order to
2571da177e4SLinus Torvalds#	make sure the checksums are up to date before we record them.
2581da177e4SLinus Torvalds
2591da177e4SLinus Torvaldsifeq ($(MAKECMDGOALS),modules)
2601da177e4SLinus Torvalds  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
2611da177e4SLinus Torvaldsendif
2621da177e4SLinus Torvalds
2631da177e4SLinus Torvalds#	If we have "make <whatever> modules", compile modules
2641da177e4SLinus Torvalds#	in addition to whatever we do anyway.
2651da177e4SLinus Torvalds#	Just "make" or "make all" shall build modules as well
2661da177e4SLinus Torvalds
2671da177e4SLinus Torvaldsifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
2681da177e4SLinus Torvalds  KBUILD_MODULES := 1
2691da177e4SLinus Torvaldsendif
2701da177e4SLinus Torvalds
2711da177e4SLinus Torvaldsifeq ($(MAKECMDGOALS),)
2721da177e4SLinus Torvalds  KBUILD_MODULES := 1
2731da177e4SLinus Torvaldsendif
2741da177e4SLinus Torvalds
275e579d351SSam Ravnborgexport KBUILD_MODULES KBUILD_BUILTIN
2761da177e4SLinus Torvaldsexport KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
2771da177e4SLinus Torvalds
2781da177e4SLinus Torvalds# Beautify output
2791da177e4SLinus Torvalds# ---------------------------------------------------------------------------
2801da177e4SLinus Torvalds#
2811da177e4SLinus Torvalds# Normally, we echo the whole command before executing it. By making
2821da177e4SLinus Torvalds# that echo $($(quiet)$(cmd)), we now have the possibility to set
2831da177e4SLinus Torvalds# $(quiet) to choose other forms of output instead, e.g.
2841da177e4SLinus Torvalds#
2851da177e4SLinus Torvalds#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
2861da177e4SLinus Torvalds#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
2871da177e4SLinus Torvalds#
2881da177e4SLinus Torvalds# If $(quiet) is empty, the whole command will be printed.
2891da177e4SLinus Torvalds# If it is set to "quiet_", only the short version will be printed.
290070b98bfSSam Ravnborg# If it is set to "silent_", nothing will be printed at all, since
2911da177e4SLinus Torvalds# the variable $(silent_cmd_cc_o_c) doesn't exist.
2921da177e4SLinus Torvalds#
293a58a414fSAdrian Bunk# A simple variant is to prefix commands with $(Q) - that's useful
2941da177e4SLinus Torvalds# for commands that shall be hidden in non-verbose mode.
2951da177e4SLinus Torvalds#
2961da177e4SLinus Torvalds#	$(Q)ln $@ :<
2971da177e4SLinus Torvalds#
2981da177e4SLinus Torvalds# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
2991da177e4SLinus Torvalds# If KBUILD_VERBOSE equals 1 then the above command is displayed.
3001da177e4SLinus Torvalds
3011da177e4SLinus Torvaldsifeq ($(KBUILD_VERBOSE),1)
3021da177e4SLinus Torvalds  quiet =
3031da177e4SLinus Torvalds  Q =
3041da177e4SLinus Torvaldselse
3051da177e4SLinus Torvalds  quiet=quiet_
3061da177e4SLinus Torvalds  Q = @
3071da177e4SLinus Torvaldsendif
3081da177e4SLinus Torvalds
3091da177e4SLinus Torvalds# If the user is running make -s (silent mode), suppress echoing of
3101da177e4SLinus Torvalds# commands
3111da177e4SLinus Torvalds
3121da177e4SLinus Torvaldsifneq ($(findstring s,$(MAKEFLAGS)),)
3131da177e4SLinus Torvalds  quiet=silent_
3141da177e4SLinus Torvaldsendif
3151da177e4SLinus Torvalds
3161da177e4SLinus Torvaldsexport quiet Q KBUILD_VERBOSE
3171da177e4SLinus Torvalds
3181da177e4SLinus Torvalds
3191da177e4SLinus Torvalds# Look for make include files relative to root of kernel src
3201da177e4SLinus TorvaldsMAKEFLAGS += --include-dir=$(srctree)
3211da177e4SLinus Torvalds
3221cacc9abSSam Ravnborg# We need some generic definitions (do not try to remake the file).
3231cacc9abSSam Ravnborg$(srctree)/scripts/Kbuild.include: ;
3242a691470SSam Ravnborginclude $(srctree)/scripts/Kbuild.include
3258ec4b4ffSSam Ravnborg
3261da177e4SLinus Torvalds# Make variables (CC, etc...)
3271da177e4SLinus Torvalds
3281da177e4SLinus TorvaldsAS		= $(CROSS_COMPILE)as
3291da177e4SLinus TorvaldsLD		= $(CROSS_COMPILE)ld
3301da177e4SLinus TorvaldsCC		= $(CROSS_COMPILE)gcc
3311da177e4SLinus TorvaldsCPP		= $(CC) -E
3321da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
3331da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
3341da177e4SLinus TorvaldsSTRIP		= $(CROSS_COMPILE)strip
3351da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
3361da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
3371da177e4SLinus TorvaldsAWK		= awk
3381da177e4SLinus TorvaldsGENKSYMS	= scripts/genksyms/genksyms
339caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
3401da177e4SLinus TorvaldsDEPMOD		= /sbin/depmod
3411da177e4SLinus TorvaldsKALLSYMS	= scripts/kallsyms
3421da177e4SLinus TorvaldsPERL		= perl
3431da177e4SLinus TorvaldsCHECK		= sparse
3441da177e4SLinus Torvalds
34580a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
34680a7d1d9SHannes Eder		  -Wbitwise -Wno-return-void $(CF)
3476588169dSSam RavnborgCFLAGS_MODULE   =
3486588169dSSam RavnborgAFLAGS_MODULE   =
3496588169dSSam RavnborgLDFLAGS_MODULE  =
3501da177e4SLinus TorvaldsCFLAGS_KERNEL	=
3511da177e4SLinus TorvaldsAFLAGS_KERNEL	=
3522521f2c2SPeter OberparleiterCFLAGS_GCOV	= -fprofile-arcs -ftest-coverage
3531da177e4SLinus Torvalds
3541da177e4SLinus Torvalds
3551da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
3561da177e4SLinus Torvalds# Needed to be compatible with the O= option
35724a675e8SSam RavnborgLINUXINCLUDE    := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \
35896f13045SSam Ravnborg                   $(if $(KBUILD_SRC), -I$(srctree)/include) \
359264a2683SSam Ravnborg                   -include include/generated/autoconf.h
3601da177e4SLinus Torvalds
361d8672b40SSam RavnborgKBUILD_CPPFLAGS := -D__KERNEL__
3621da177e4SLinus Torvalds
363a0f97e06SSam RavnborgKBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
36494bed2a9SDave Jones		   -fno-strict-aliasing -fno-common \
365a8735821SFloris Kraak		   -Werror-implicit-function-declaration \
366a3ca86aeSEugene Teo		   -Wno-format-security \
367a3ca86aeSEugene Teo		   -fno-delete-null-pointer-checks
36880c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
36980c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
370222d394dSSam RavnborgKBUILD_AFLAGS   := -D__ASSEMBLY__
3716588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
3726588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
3736588169dSSam RavnborgKBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
3741da177e4SLinus Torvalds
375f1d28fb0SRoman Zippel# Read KERNELRELEASE from include/config/kernel.release (if it exists)
376f1d28fb0SRoman ZippelKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
3772244cbd8SSam RavnborgKERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
378cb58455cSSam Ravnborg
379070b98bfSSam Ravnborgexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
38080ef88d6SSam Ravnborgexport ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
381caa27b66SSam Ravnborgexport CPP AR NM STRIP OBJCOPY OBJDUMP
382caa27b66SSam Ravnborgexport MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
383070b98bfSSam Ravnborgexport HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
3841da177e4SLinus Torvalds
38506c5040cSSam Ravnborgexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
3862521f2c2SPeter Oberparleiterexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
387222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
3886588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
38980c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
3901da177e4SLinus Torvalds
3911da177e4SLinus Torvalds# When compiling out-of-tree modules, put MODVERDIR in the module
3921da177e4SLinus Torvalds# tree rather than in the kernel tree. The kernel tree might
3931da177e4SLinus Torvalds# even be read-only.
3941da177e4SLinus Torvaldsexport MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
3951da177e4SLinus Torvalds
3961da177e4SLinus Torvalds# Files to ignore in find ... statements
3971da177e4SLinus Torvalds
398406119f4STrond MyklebustRCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
399406119f4STrond Myklebustexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
4001da177e4SLinus Torvalds
4011da177e4SLinus Torvalds# ===========================================================================
4021da177e4SLinus Torvalds# Rules shared between *config targets and build targets
4031da177e4SLinus Torvalds
4041da177e4SLinus Torvalds# Basic helpers built in scripts/
4054f193362SPaul SmithPHONY += scripts_basic
4061da177e4SLinus Torvaldsscripts_basic:
4071da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
408638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
4091da177e4SLinus Torvalds
410cd05e6bdSJan Beulich# To avoid any implicit rule to kick in, define an empty command.
411cd05e6bdSJan Beulichscripts/basic/%: scripts_basic ;
412cd05e6bdSJan Beulich
4134f193362SPaul SmithPHONY += outputmakefile
414fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
415fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
416fd5f0cd6SJan Beulich# output directory.
4171da177e4SLinus Torvaldsoutputmakefile:
418fd5f0cd6SJan Beulichifneq ($(KBUILD_SRC),)
41992979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
420fd5f0cd6SJan Beulich	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
421fd5f0cd6SJan Beulich	    $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
422fd5f0cd6SJan Beulichendif
4231da177e4SLinus Torvalds
4241da177e4SLinus Torvalds# To make sure we do not include .config for any of the *config targets
4251da177e4SLinus Torvalds# catch them early, and hand them over to scripts/kconfig/Makefile
4261da177e4SLinus Torvalds# It is allowed to specify more targets when calling make, including
4271da177e4SLinus Torvalds# mixing *config targets and build targets.
4281da177e4SLinus Torvalds# For example 'make oldconfig all'.
4291da177e4SLinus Torvalds# Detect when mixed targets is specified, and make a second invocation
4301da177e4SLinus Torvalds# of make so .config is not included in this case either (for *config).
4311da177e4SLinus Torvalds
4323eb3c740SRoman Zippelno-dot-config-targets := clean mrproper distclean \
433f4ed1009SJianbin Kang			 cscope gtags TAGS tags help %docs check% coccicheck \
4343eb3c740SRoman Zippel			 include/linux/version.h headers_% \
4354aed2fd8SLinus Torvalds			 kernelversion %src-pkg
4361da177e4SLinus Torvalds
4371da177e4SLinus Torvaldsconfig-targets := 0
4381da177e4SLinus Torvaldsmixed-targets  := 0
4391da177e4SLinus Torvaldsdot-config     := 1
4401da177e4SLinus Torvalds
4411da177e4SLinus Torvaldsifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
4421da177e4SLinus Torvalds	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
4431da177e4SLinus Torvalds		dot-config := 0
4441da177e4SLinus Torvalds	endif
4451da177e4SLinus Torvaldsendif
4461da177e4SLinus Torvalds
4471da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
4481da177e4SLinus Torvalds        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
4491da177e4SLinus Torvalds                config-targets := 1
4501da177e4SLinus Torvalds                ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
4511da177e4SLinus Torvalds                        mixed-targets := 1
4521da177e4SLinus Torvalds                endif
4531da177e4SLinus Torvalds        endif
4541da177e4SLinus Torvaldsendif
4551da177e4SLinus Torvalds
4561da177e4SLinus Torvaldsifeq ($(mixed-targets),1)
4571da177e4SLinus Torvalds# ===========================================================================
4581da177e4SLinus Torvalds# We're called with mixed targets (*config and build targets).
4591da177e4SLinus Torvalds# Handle them one by one.
4601da177e4SLinus Torvalds
4611da177e4SLinus Torvalds%:: FORCE
4621da177e4SLinus Torvalds	$(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
4631da177e4SLinus Torvalds
4641da177e4SLinus Torvaldselse
4651da177e4SLinus Torvaldsifeq ($(config-targets),1)
4661da177e4SLinus Torvalds# ===========================================================================
4671da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
4681da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
4691da177e4SLinus Torvalds
4701da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
4711da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
4721da177e4SLinus Torvalds# used for 'make defconfig'
47374b469f2SSam Ravnborginclude $(srctree)/arch/$(SRCARCH)/Makefile
47461bee204SAl Viroexport KBUILD_DEFCONFIG KBUILD_KCONFIG
4751da177e4SLinus Torvalds
47631110ebbSSam Ravnborgconfig: scripts_basic outputmakefile FORCE
47731110ebbSSam Ravnborg	$(Q)mkdir -p include/linux include/config
47831110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
47931110ebbSSam Ravnborg
48031110ebbSSam Ravnborg%config: scripts_basic outputmakefile FORCE
481c955ccafSRoman Zippel	$(Q)mkdir -p include/linux include/config
4821da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
4831da177e4SLinus Torvalds
4841da177e4SLinus Torvaldselse
4851da177e4SLinus Torvalds# ===========================================================================
4861da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
4871da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
4881da177e4SLinus Torvalds
4891da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
4901da177e4SLinus Torvalds# Additional helpers built in scripts/
4911da177e4SLinus Torvalds# Carefully list dependencies so we do not try to build scripts twice
492070b98bfSSam Ravnborg# in parallel
4934f193362SPaul SmithPHONY += scripts
494bc081dd6SMichal Marekscripts: scripts_basic include/config/auto.conf include/config/tristate.conf
4951da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=$(@)
4961da177e4SLinus Torvalds
4971da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
4981da177e4SLinus Torvaldsinit-y		:= init/
4994d2acfbfSDavid Woodhousedrivers-y	:= drivers/ sound/ firmware/
5001da177e4SLinus Torvaldsnet-y		:= net/
5011da177e4SLinus Torvaldslibs-y		:= lib/
5021da177e4SLinus Torvaldscore-y		:= usr/
5031da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
5041da177e4SLinus Torvalds
5051da177e4SLinus Torvaldsifeq ($(dot-config),1)
5069ee4e336SSam Ravnborg# Read in config
5079ee4e336SSam Ravnborg-include include/config/auto.conf
5081da177e4SLinus Torvalds
5099ee4e336SSam Ravnborgifeq ($(KBUILD_EXTMOD),)
5101da177e4SLinus Torvalds# Read in dependencies to all Kconfig* files, make sure to run
5111da177e4SLinus Torvalds# oldconfig if changes are detected.
512c955ccafSRoman Zippel-include include/config/auto.conf.cmd
5131da177e4SLinus Torvalds
5141da177e4SLinus Torvalds# To avoid any implicit rule to kick in, define an empty command
51514cdd3c4SRoman Zippel$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
5161da177e4SLinus Torvalds
517c955ccafSRoman Zippel# If .config is newer than include/config/auto.conf, someone tinkered
518752625cfSSam Ravnborg# with it and forgot to run make oldconfig.
519070b98bfSSam Ravnborg# if auto.conf.cmd is missing then we are probably in a cleaned tree so
520752625cfSSam Ravnborg# we execute the config step to be sure to catch updated Kconfig files
521bc081dd6SMichal Marekinclude/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
5221da177e4SLinus Torvalds	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
5231da177e4SLinus Torvaldselse
524264a2683SSam Ravnborg# external modules needs include/generated/autoconf.h and include/config/auto.conf
5259ee4e336SSam Ravnborg# but do not care if they are up-to-date. Use auto.conf to trigger the test
5269ee4e336SSam RavnborgPHONY += include/config/auto.conf
5279ee4e336SSam Ravnborg
5289ee4e336SSam Ravnborginclude/config/auto.conf:
529264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
5309ee4e336SSam Ravnborg	echo;								\
5319ee4e336SSam Ravnborg	echo "  ERROR: Kernel configuration is invalid.";		\
532264a2683SSam Ravnborg	echo "         include/generated/autoconf.h or $@ are missing.";\
5339ee4e336SSam Ravnborg	echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
5349ee4e336SSam Ravnborg	echo;								\
5359ee4e336SSam Ravnborg	/bin/false)
5369ee4e336SSam Ravnborg
5379ee4e336SSam Ravnborgendif # KBUILD_EXTMOD
538c955ccafSRoman Zippel
5391da177e4SLinus Torvaldselse
5401da177e4SLinus Torvalds# Dummy target needed, because used as prerequisite
541c955ccafSRoman Zippelinclude/config/auto.conf: ;
5429ee4e336SSam Ravnborgendif # $(dot-config)
5431da177e4SLinus Torvalds
5441da177e4SLinus Torvalds# The all: target is the default when no target is given on the
5451da177e4SLinus Torvalds# command line.
5461da177e4SLinus Torvalds# This allow a user to issue only 'make' to build a kernel including modules
547c8447161SMichal Marek# Defaults to vmlinux, but the arch makefile usually adds further targets
5481da177e4SLinus Torvaldsall: vmlinux
5491da177e4SLinus Torvalds
5501da177e4SLinus Torvaldsifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
551a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -Os
5521da177e4SLinus Torvaldselse
553a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -O2
5541da177e4SLinus Torvaldsendif
5551da177e4SLinus Torvalds
556bef5b54bSRalf Baechleinclude $(srctree)/arch/$(SRCARCH)/Makefile
557bef5b54bSRalf Baechle
55808f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
55935bb5b1eSAndi KleenKBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
56035bb5b1eSAndi Kleenendif
56135bb5b1eSAndi Kleen
562e06b8b98SSam Ravnborg# Force gcc to behave correct even for buggy distributions
5635d707e9cSTejun Heoifndef CONFIG_CC_STACKPROTECTOR
564e06b8b98SSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
5655d707e9cSTejun Heoendif
566e06b8b98SSam Ravnborg
5671da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
568a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
5691da177e4SLinus Torvaldselse
5707e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
5717e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
5727e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
5737e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
5747e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
5757e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
576a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
5771da177e4SLinus Torvaldsendif
5787e9501fdSRabin Vincentendif
5791da177e4SLinus Torvalds
5801da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
581a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -g
582222d394dSSam RavnborgKBUILD_AFLAGS	+= -gdwarf-2
5831da177e4SLinus Torvaldsendif
5841da177e4SLinus Torvalds
585d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
586d6f4ceb7SAndi KleenKBUILD_CFLAGS 	+= $(call cc-option, -femit-struct-debug-baseonly)
587d6f4ceb7SAndi Kleenendif
588d6f4ceb7SAndi Kleen
589606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
59016444a8aSArnaldo Carvalho de MeloKBUILD_CFLAGS	+= -pg
59172441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE
592cf4db259SSteven Rostedt	ifdef CONFIG_HAVE_C_RECORDMCOUNT
59372441cb1SSteven Rostedt		BUILD_C_RECORDMCOUNT := y
59472441cb1SSteven Rostedt		export BUILD_C_RECORDMCOUNT
59572441cb1SSteven Rostedt	endif
59672441cb1SSteven Rostedtendif
59716444a8aSArnaldo Carvalho de Meloendif
59816444a8aSArnaldo Carvalho de Melo
59991341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
60091341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
60191341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
60291341d4bSSam Ravnborgendif
60391341d4bSSam Ravnborg
604e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
605e8f5bdb0SRik van RielNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
606e8e69931SSam RavnborgCHECKFLAGS     += $(NOSTDINC_FLAGS)
607e8e69931SSam Ravnborg
6081da177e4SLinus Torvalds# warn about C99 declaration after statement
609a0f97e06SSam RavnborgKBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
6101da177e4SLinus Torvalds
611070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
612a0f97e06SSam RavnborgKBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
6131da177e4SLinus Torvalds
614fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
615a137802eSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
616d0115552SLinus Torvalds
6178f7f5c9fSAndi Kleen# conserve stack if available
6188f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
6198f7f5c9fSAndi Kleen
620bf5438fcSJason Baron# check for 'asm goto'
621bf5438fcSJason Baronifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
622bf5438fcSJason Baron	KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
623bf5438fcSJason Baronendif
624bf5438fcSJason Baron
62506c5040cSSam Ravnborg# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
62669ee0b35SSam Ravnborg# But warn user when we do so
62769ee0b35SSam Ravnborgwarn-assign = \
62869ee0b35SSam Ravnborg$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
62969ee0b35SSam Ravnborg
63069ee0b35SSam Ravnborgifneq ($(KCPPFLAGS),)
63169ee0b35SSam Ravnborg        $(call warn-assign,CPPFLAGS)
63269ee0b35SSam Ravnborg        KBUILD_CPPFLAGS += $(KCPPFLAGS)
63369ee0b35SSam Ravnborgendif
63469ee0b35SSam Ravnborgifneq ($(KAFLAGS),)
63569ee0b35SSam Ravnborg        $(call warn-assign,AFLAGS)
63669ee0b35SSam Ravnborg        KBUILD_AFLAGS += $(KAFLAGS)
63769ee0b35SSam Ravnborgendif
63869ee0b35SSam Ravnborgifneq ($(KCFLAGS),)
63969ee0b35SSam Ravnborg        $(call warn-assign,CFLAGS)
64069ee0b35SSam Ravnborg        KBUILD_CFLAGS += $(KCFLAGS)
64169ee0b35SSam Ravnborgendif
64252bcc330SSam Ravnborg
64318991197SRoland McGrath# Use --build-id when available.
64418991197SRoland McGrathLDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
645f86fd306SSam Ravnborg			      $(call cc-ldoption, -Wl$(comma)--build-id,))
6466588169dSSam RavnborgKBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
64718991197SRoland McGrathLDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
64818991197SRoland McGrath
6495d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
650d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
6515d7d18f5SDavid Howellsendif
6525d7d18f5SDavid Howells
6531da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
6541da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
6551da177e4SLinus Torvalds# set in the environment
6561da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
6571da177e4SLinus Torvalds# this default value
6581da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
6591da177e4SLinus Torvalds
6601da177e4SLinus Torvalds#
6611da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
6621da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
6631da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
6641da177e4SLinus Torvalds
6651da177e4SLinus Torvalds#
6661da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
6671da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
668070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
6691da177e4SLinus Torvalds#
6701da177e4SLinus Torvalds
671df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
6721da177e4SLinus Torvaldsexport MODLIB
6731da177e4SLinus Torvalds
674ac031f26STheodore Ts'o#
6752ea03891SSam Ravnborg#  INSTALL_MOD_STRIP, if defined, will cause modules to be
6762ea03891SSam Ravnborg#  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
6772ea03891SSam Ravnborg#  the default option --strip-debug will be used.  Otherwise,
678177b241dSGilles Espinasse#  INSTALL_MOD_STRIP value will be used as the options to the strip command.
6792ea03891SSam Ravnborg
680ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP
681ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1)
6822ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug
683ac031f26STheodore Ts'oelse
6842ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
685ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1
686ac031f26STheodore Ts'oelse
6872ea03891SSam Ravnborgmod_strip_cmd = true
688ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP
689ac031f26STheodore Ts'oexport mod_strip_cmd
690ac031f26STheodore Ts'o
6911da177e4SLinus Torvalds
6921da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
6933a65dfe8SJens Axboecore-y		+= kernel/ mm/ fs/ ipc/ security/ crypto/ block/
6941da177e4SLinus Torvalds
6951da177e4SLinus Torvaldsvmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
6961da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
6971da177e4SLinus Torvalds		     $(net-y) $(net-m) $(libs-y) $(libs-m)))
6981da177e4SLinus Torvalds
6991da177e4SLinus Torvaldsvmlinux-alldirs	:= $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
7001da177e4SLinus Torvalds		     $(init-n) $(init-) \
7011da177e4SLinus Torvalds		     $(core-n) $(core-) $(drivers-n) $(drivers-) \
7021da177e4SLinus Torvalds		     $(net-n)  $(net-)  $(libs-n)    $(libs-))))
7031da177e4SLinus Torvalds
7041da177e4SLinus Torvaldsinit-y		:= $(patsubst %/, %/built-in.o, $(init-y))
7051da177e4SLinus Torvaldscore-y		:= $(patsubst %/, %/built-in.o, $(core-y))
7061da177e4SLinus Torvaldsdrivers-y	:= $(patsubst %/, %/built-in.o, $(drivers-y))
7071da177e4SLinus Torvaldsnet-y		:= $(patsubst %/, %/built-in.o, $(net-y))
7081da177e4SLinus Torvaldslibs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))
7091da177e4SLinus Torvaldslibs-y2		:= $(patsubst %/, %/built-in.o, $(libs-y))
7101da177e4SLinus Torvaldslibs-y		:= $(libs-y1) $(libs-y2)
7111da177e4SLinus Torvalds
7121da177e4SLinus Torvalds# Build vmlinux
7131da177e4SLinus Torvalds# ---------------------------------------------------------------------------
714070b98bfSSam Ravnborg# vmlinux is built from the objects selected by $(vmlinux-init) and
7151da177e4SLinus Torvalds# $(vmlinux-main). Most are built-in.o files from top-level directories
7162462566fSUwe Zeisberger# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
7171da177e4SLinus Torvalds# Ordering when linking is important, and $(vmlinux-init) must be first.
7181da177e4SLinus Torvalds#
7191da177e4SLinus Torvalds# vmlinux
7201da177e4SLinus Torvalds#   ^
7211da177e4SLinus Torvalds#   |
7221da177e4SLinus Torvalds#   +-< $(vmlinux-init)
7231da177e4SLinus Torvalds#   |   +--< init/version.o + more
7241da177e4SLinus Torvalds#   |
7251da177e4SLinus Torvalds#   +--< $(vmlinux-main)
7261da177e4SLinus Torvalds#   |    +--< driver/built-in.o mm/built-in.o + more
7271da177e4SLinus Torvalds#   |
7281da177e4SLinus Torvalds#   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
7291da177e4SLinus Torvalds#
7301da177e4SLinus Torvalds# vmlinux version (uname -v) cannot be updated during normal
7311da177e4SLinus Torvalds# descending-into-subdirs phase since we do not yet know if we need to
7321da177e4SLinus Torvalds# update vmlinux.
7331da177e4SLinus Torvalds# Therefore this step is delayed until just before final link of vmlinux -
7341da177e4SLinus Torvalds# except in the kallsyms case where it is done just before adding the
7351da177e4SLinus Torvalds# symbols to the kernel.
7361da177e4SLinus Torvalds#
7371da177e4SLinus Torvalds# System.map is generated to document addresses of all kernel symbols
7381da177e4SLinus Torvalds
7391da177e4SLinus Torvaldsvmlinux-init := $(head-y) $(init-y)
7401da177e4SLinus Torvaldsvmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
7411da177e4SLinus Torvaldsvmlinux-all  := $(vmlinux-init) $(vmlinux-main)
7426752ed90SThomas Gleixnervmlinux-lds  := arch/$(SRCARCH)/kernel/vmlinux.lds
74385bd2fddSSam Ravnborgexport KBUILD_VMLINUX_OBJS := $(vmlinux-all)
7441da177e4SLinus Torvalds
7451da177e4SLinus Torvalds# Rule to link vmlinux - also used during CONFIG_KALLSYMS
7461da177e4SLinus Torvalds# May be overridden by arch/$(ARCH)/Makefile
7471da177e4SLinus Torvaldsquiet_cmd_vmlinux__ ?= LD      $@
7481da177e4SLinus Torvalds      cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
7491da177e4SLinus Torvalds      -T $(vmlinux-lds) $(vmlinux-init)                          \
7501da177e4SLinus Torvalds      --start-group $(vmlinux-main) --end-group                  \
751741f98feSSam Ravnborg      $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
7521da177e4SLinus Torvalds
7531da177e4SLinus Torvalds# Generate new vmlinux version
7541da177e4SLinus Torvaldsquiet_cmd_vmlinux_version = GEN     .version
7551da177e4SLinus Torvalds      cmd_vmlinux_version = set -e;                     \
7564e25d8bbSJan Beulich	if [ ! -r .version ]; then			\
7574e25d8bbSJan Beulich	  rm -f .version;				\
7584e25d8bbSJan Beulich	  echo 1 >.version;				\
7594e25d8bbSJan Beulich	else						\
7604e25d8bbSJan Beulich	  mv .version .old_version;			\
7614e25d8bbSJan Beulich	  expr 0$$(cat .old_version) + 1 >.version;	\
7624e25d8bbSJan Beulich	fi;						\
7631da177e4SLinus Torvalds	$(MAKE) $(build)=init
7641da177e4SLinus Torvalds
7651da177e4SLinus Torvalds# Generate System.map
7661da177e4SLinus Torvaldsquiet_cmd_sysmap = SYSMAP
7671da177e4SLinus Torvalds      cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
7681da177e4SLinus Torvalds
7691da177e4SLinus Torvalds# Link of vmlinux
7701da177e4SLinus Torvalds# If CONFIG_KALLSYMS is set .version is already updated
7711da177e4SLinus Torvalds# Generate System.map and verify that the content is consistent
77239ca371cSMark Rustad# Use + in front of the vmlinux_version rule to silent warning with make -j2
77339ca371cSMark Rustad# First command is ':' to allow us to use + in front of the rule
7741da177e4SLinus Torvaldsdefine rule_vmlinux__
77539ca371cSMark Rustad	:
7761da177e4SLinus Torvalds	$(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
7771da177e4SLinus Torvalds
7781da177e4SLinus Torvalds	$(call cmd,vmlinux__)
7791da177e4SLinus Torvalds	$(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
7801da177e4SLinus Torvalds
7811da177e4SLinus Torvalds	$(Q)$(if $($(quiet)cmd_sysmap),                                      \
7821da177e4SLinus Torvalds	  echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
7831da177e4SLinus Torvalds	$(cmd_sysmap) $@ System.map;                                         \
7841da177e4SLinus Torvalds	if [ $$? -ne 0 ]; then                                               \
7851da177e4SLinus Torvalds		rm -f $@;                                                    \
7861da177e4SLinus Torvalds		/bin/false;                                                  \
7871da177e4SLinus Torvalds	fi;
7881da177e4SLinus Torvalds	$(verify_kallsyms)
7891da177e4SLinus Torvaldsendef
7901da177e4SLinus Torvalds
7911da177e4SLinus Torvalds
7921da177e4SLinus Torvaldsifdef CONFIG_KALLSYMS
7931da177e4SLinus Torvalds# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
7941da177e4SLinus Torvalds# It's a three stage process:
7951da177e4SLinus Torvalds# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
7961da177e4SLinus Torvalds#   empty
7971da177e4SLinus Torvalds#   Running kallsyms on that gives us .tmp_kallsyms1.o with
7981da177e4SLinus Torvalds#   the right size - vmlinux version (uname -v) is updated during this step
7991da177e4SLinus Torvalds# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
8001da177e4SLinus Torvalds#   but due to the added section, some addresses have shifted.
8011da177e4SLinus Torvalds#   From here, we generate a correct .tmp_kallsyms2.o
8021da177e4SLinus Torvalds# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
8031da177e4SLinus Torvalds# o Verify that the System.map from vmlinux matches the map from
8041da177e4SLinus Torvalds#   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
8051da177e4SLinus Torvalds# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
8061da177e4SLinus Torvalds#   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
8071da177e4SLinus Torvalds#   temporary bypass to allow the kernel to be built while the
8081da177e4SLinus Torvalds#   maintainers work out what went wrong with kallsyms.
8091da177e4SLinus Torvalds
8101da177e4SLinus Torvaldsifdef CONFIG_KALLSYMS_EXTRA_PASS
8111da177e4SLinus Torvaldslast_kallsyms := 3
8121da177e4SLinus Torvaldselse
8131da177e4SLinus Torvaldslast_kallsyms := 2
8141da177e4SLinus Torvaldsendif
8151da177e4SLinus Torvalds
8161da177e4SLinus Torvaldskallsyms.o := .tmp_kallsyms$(last_kallsyms).o
8171da177e4SLinus Torvalds
8181da177e4SLinus Torvaldsdefine verify_kallsyms
8191da177e4SLinus Torvalds	$(Q)$(if $($(quiet)cmd_sysmap),                                      \
8201da177e4SLinus Torvalds	  echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
8211da177e4SLinus Torvalds	  $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
8221da177e4SLinus Torvalds	$(Q)cmp -s System.map .tmp_System.map ||                             \
8231da177e4SLinus Torvalds		(echo Inconsistent kallsyms data;                            \
8241da177e4SLinus Torvalds		 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
8251da177e4SLinus Torvalds		 rm .tmp_kallsyms* ; /bin/false )
8261da177e4SLinus Torvaldsendef
8271da177e4SLinus Torvalds
8281da177e4SLinus Torvalds# Update vmlinux version before link
8291da177e4SLinus Torvalds# Use + in front of this rule to silent warning about make -j1
83072ba47c1SSam Ravnborg# First command is ':' to allow us to use + in front of this rule
8311da177e4SLinus Torvaldscmd_ksym_ld = $(cmd_vmlinux__)
8321da177e4SLinus Torvaldsdefine rule_ksym_ld
83372ba47c1SSam Ravnborg	:
8341da177e4SLinus Torvalds	+$(call cmd,vmlinux_version)
8351da177e4SLinus Torvalds	$(call cmd,vmlinux__)
8361da177e4SLinus Torvalds	$(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
8371da177e4SLinus Torvaldsendef
8381da177e4SLinus Torvalds
8391da177e4SLinus Torvalds# Generate .S file with all kernel symbols
8401da177e4SLinus Torvaldsquiet_cmd_kallsyms = KSYM    $@
8412ea03891SSam Ravnborg      cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
8422ea03891SSam Ravnborg                     $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
8431da177e4SLinus Torvalds
8442ea03891SSam Ravnborg.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
8451da177e4SLinus Torvalds	$(call if_changed_dep,as_o_S)
8461da177e4SLinus Torvalds
8472ea03891SSam Ravnborg.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
8481da177e4SLinus Torvalds	$(call cmd,kallsyms)
8491da177e4SLinus Torvalds
8501da177e4SLinus Torvalds# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
8512ea03891SSam Ravnborg.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
8522ea03891SSam Ravnborg	$(call if_changed_rule,ksym_ld)
8531da177e4SLinus Torvalds
8542ea03891SSam Ravnborg.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
8552ea03891SSam Ravnborg	$(call if_changed,vmlinux__)
8561da177e4SLinus Torvalds
8572ea03891SSam Ravnborg.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
8582ea03891SSam Ravnborg	$(call if_changed,vmlinux__)
8591da177e4SLinus Torvalds
8601da177e4SLinus Torvalds# Needs to visit scripts/ before $(KALLSYMS) can be used.
8611da177e4SLinus Torvalds$(KALLSYMS): scripts ;
8621da177e4SLinus Torvalds
86333bc25eaSSam Ravnborg# Generate some data for debugging strange kallsyms problems
86433bc25eaSSam Ravnborgdebug_kallsyms: .tmp_map$(last_kallsyms)
86533bc25eaSSam Ravnborg
86633bc25eaSSam Ravnborg.tmp_map%: .tmp_vmlinux% FORCE
86733bc25eaSSam Ravnborg	($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
86833bc25eaSSam Ravnborg
86933bc25eaSSam Ravnborg.tmp_map3: .tmp_map2
87033bc25eaSSam Ravnborg
87133bc25eaSSam Ravnborg.tmp_map2: .tmp_map1
87233bc25eaSSam Ravnborg
8731da177e4SLinus Torvaldsendif # ifdef CONFIG_KALLSYMS
8741da177e4SLinus Torvalds
875741f98feSSam Ravnborg# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
876741f98feSSam Ravnborg# relevant sections renamed as per the linker script.
877741f98feSSam Ravnborgquiet_cmd_vmlinux-modpost = LD      $@
878741f98feSSam Ravnborg      cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
879741f98feSSam Ravnborg	 $(vmlinux-init) --start-group $(vmlinux-main) --end-group             \
88090ebd878SSam Ravnborg	 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
881741f98feSSam Ravnborgdefine rule_vmlinux-modpost
882741f98feSSam Ravnborg	:
883741f98feSSam Ravnborg	+$(call cmd,vmlinux-modpost)
884741f98feSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
885741f98feSSam Ravnborg	$(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
886741f98feSSam Ravnborgendef
887741f98feSSam Ravnborg
8881da177e4SLinus Torvalds# vmlinux image - including updated kernel symbols
889310f8243SSam Ravnborgvmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
8900f836e5fSDavid Woodhouseifdef CONFIG_HEADERS_CHECK
8910e7af8d0SDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
8920f836e5fSDavid Woodhouseendif
893267c4025SMathieu Desnoyersifdef CONFIG_SAMPLES
894267c4025SMathieu Desnoyers	$(Q)$(MAKE) $(build)=samples
895267c4025SMathieu Desnoyersendif
8963794f3e8SRandy Dunlapifdef CONFIG_BUILD_DOCSRC
8973794f3e8SRandy Dunlap	$(Q)$(MAKE) $(build)=Documentation
8983794f3e8SRandy Dunlapendif
899741f98feSSam Ravnborg	$(call vmlinux-modpost)
9001da177e4SLinus Torvalds	$(call if_changed_rule,vmlinux__)
9014e25d8bbSJan Beulich	$(Q)rm -f .old_version
9021da177e4SLinus Torvalds
903310f8243SSam Ravnborg# build vmlinux.o first to catch section mismatch errors early
904cf87dcd1SSam Ravnborgifdef CONFIG_KALLSYMS
905cf87dcd1SSam Ravnborg.tmp_vmlinux1: vmlinux.o
906cf87dcd1SSam Ravnborgendif
90790ebd878SSam Ravnborg
90890ebd878SSam Ravnborgmodpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
90990ebd878SSam Ravnborgvmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
910741f98feSSam Ravnborg	$(call if_changed_rule,vmlinux-modpost)
911741f98feSSam Ravnborg
9121da177e4SLinus Torvalds# The actual objects are generated when descending,
9131da177e4SLinus Torvalds# make sure no implicit rule kicks in
9141da177e4SLinus Torvalds$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
9151da177e4SLinus Torvalds
9161da177e4SLinus Torvalds# Handle descending into subdirectories listed in $(vmlinux-dirs)
9171da177e4SLinus Torvalds# Preset locale variables to speed up the build process. Limit locale
9181da177e4SLinus Torvalds# tweaks to this spot to avoid wrong language settings when running
9191da177e4SLinus Torvalds# make menuconfig etc.
9201da177e4SLinus Torvalds# Error messages still appears in the original language
9211da177e4SLinus Torvalds
9224f193362SPaul SmithPHONY += $(vmlinux-dirs)
9235bb78269SSam Ravnborg$(vmlinux-dirs): prepare scripts
9241da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=$@
9251da177e4SLinus Torvalds
926f1d28fb0SRoman Zippel# Store (new) KERNELRELASE string in include/config/kernel.release
927f1d28fb0SRoman Zippelinclude/config/kernel.release: include/config/auto.conf FORCE
9282244cbd8SSam Ravnborg	$(Q)rm -f $@
9297263e715SMichal Marek	$(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
930cb58455cSSam Ravnborg
931cb58455cSSam Ravnborg
9321da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
9335bb78269SSam Ravnborg# or the modules are listed in "prepare".
9345bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
9355bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
9365bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
9371da177e4SLinus Torvalds
9385bb78269SSam Ravnborg# Listed in dependency order
9394f193362SPaul SmithPHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
9405bb78269SSam Ravnborg
94186feeaa8SSam Ravnborg# prepare3 is used to check if we are building in a separate output directory,
9421da177e4SLinus Torvalds# and if so do:
9431da177e4SLinus Torvalds# 1) Check that make has not been executed in the kernel src $(srctree)
944f1d28fb0SRoman Zippelprepare3: include/config/kernel.release
9451da177e4SLinus Torvaldsifneq ($(KBUILD_SRC),)
946fd54f502SMike Frysinger	@$(kecho) '  Using $(srctree) as source for kernel'
947c955ccafSRoman Zippel	$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
9481da177e4SLinus Torvalds		echo "  $(srctree) is not clean, please run 'make mrproper'";\
9491da177e4SLinus Torvalds		echo "  in the '$(srctree)' directory.";\
9501da177e4SLinus Torvalds		/bin/false; \
9511da177e4SLinus Torvalds	fi;
9521da177e4SLinus Torvaldsendif
9531da177e4SLinus Torvalds
95486feeaa8SSam Ravnborg# prepare2 creates a makefile if using a separate output directory
95586feeaa8SSam Ravnborgprepare2: prepare3 outputmakefile
9561da177e4SLinus Torvalds
957273b281fSSam Ravnborgprepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
958f7f16b77SSam Ravnborg                   include/config/auto.conf
9597bb9d092SSam Ravnborg	$(cmd_crmodverdir)
9601da177e4SLinus Torvalds
9615bb78269SSam Ravnborgarchprepare: prepare1 scripts_basic
9625bb78269SSam Ravnborg
9635bb78269SSam Ravnborgprepare0: archprepare FORCE
9648d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
965c53aeca0SSam Ravnborg	$(Q)$(MAKE) $(build)=. missing-syscalls
96686feeaa8SSam Ravnborg
9671da177e4SLinus Torvalds# All the preparing..
968d395efb5SRobert P. J. Dayprepare: prepare0
9691da177e4SLinus Torvalds
9701da177e4SLinus Torvalds# Generate some files
9711da177e4SLinus Torvalds# ---------------------------------------------------------------------------
9721da177e4SLinus Torvalds
9731da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
9741da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
9751da177e4SLinus Torvalds
9761da177e4SLinus Torvaldsuts_len := 64
97763104eecSSam Ravnborgdefine filechk_utsrelease.h
9781da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
9791da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
9801da177e4SLinus Torvalds	  exit 1;                                                         \
9811da177e4SLinus Torvalds	fi;                                                               \
98263104eecSSam Ravnborg	(echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
9831da177e4SLinus Torvaldsendef
9841da177e4SLinus Torvalds
98563104eecSSam Ravnborgdefine filechk_version.h
98663104eecSSam Ravnborg	(echo \#define LINUX_VERSION_CODE $(shell                             \
98763104eecSSam Ravnborg	expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
98863104eecSSam Ravnborg	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
98963104eecSSam Ravnborgendef
99063104eecSSam Ravnborg
99163104eecSSam Ravnborginclude/linux/version.h: $(srctree)/Makefile FORCE
9921da177e4SLinus Torvalds	$(call filechk,version.h)
9931da177e4SLinus Torvalds
994273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
99563104eecSSam Ravnborg	$(call filechk,utsrelease.h)
99663104eecSSam Ravnborg
997179efcb4SVegard NossumPHONY += headerdep
998179efcb4SVegard Nossumheaderdep:
999179efcb4SVegard Nossum	$(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1000179efcb4SVegard Nossum
10011da177e4SLinus Torvalds# ---------------------------------------------------------------------------
10021da177e4SLinus Torvalds
10034f193362SPaul SmithPHONY += depend dep
10041da177e4SLinus Torvaldsdepend dep:
10051da177e4SLinus Torvalds	@echo '*** Warning: make $@ is unnecessary now.'
10061da177e4SLinus Torvalds
10071da177e4SLinus Torvalds# ---------------------------------------------------------------------------
100888ecf814SDavid Woodhouse# Firmware install
100988ecf814SDavid WoodhouseINSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
101088ecf814SDavid Woodhouseexport INSTALL_FW_PATH
101188ecf814SDavid Woodhouse
101288ecf814SDavid WoodhousePHONY += firmware_install
101388ecf814SDavid Woodhousefirmware_install: FORCE
101488ecf814SDavid Woodhouse	@mkdir -p $(objtree)/firmware
101588ecf814SDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
101688ecf814SDavid Woodhouse
101788ecf814SDavid Woodhouse# ---------------------------------------------------------------------------
10188d730cfbSDavid Woodhouse# Kernel headers
10198d730cfbSDavid Woodhouse
1020e6883b18SSam Ravnborg#Default location for installed headers
1021e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1022e6883b18SSam Ravnborg
1023e6883b18SSam Ravnborghdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
10242fb9b1bdSSam Ravnborg
10252fb9b1bdSSam Ravnborg# If we do an all arch process set dst to asm-$(hdr-arch)
10262fb9b1bdSSam Ravnborghdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1027e6883b18SSam Ravnborg
1028e6883b18SSam RavnborgPHONY += __headers
1029e6883b18SSam Ravnborg__headers: include/linux/version.h scripts_basic FORCE
1030e1b702cfSMike Waychison	$(Q)$(MAKE) $(build)=scripts build_unifdef
10316d716275SDavid Woodhouse
10326d716275SDavid WoodhousePHONY += headers_install_all
10332fb9b1bdSSam Ravnborgheaders_install_all:
10342fb9b1bdSSam Ravnborg	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
10356d716275SDavid Woodhouse
10368d730cfbSDavid WoodhousePHONY += headers_install
1037e6883b18SSam Ravnborgheaders_install: __headers
1038c95fa08aSSam Ravnborg	$(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
10392fb9b1bdSSam Ravnborg	$(error Headers not exportable for the $(SRCARCH) architecture))
104088181ec3SSam Ravnborg	$(Q)$(MAKE) $(hdr-inst)=include
1041c95fa08aSSam Ravnborg	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
10428d730cfbSDavid Woodhouse
10431f85712eSMike FrysingerPHONY += headers_check_all
10441f85712eSMike Frysingerheaders_check_all: headers_install_all
10452fb9b1bdSSam Ravnborg	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
10461f85712eSMike Frysinger
104768475359SDavid WoodhousePHONY += headers_check
104868475359SDavid Woodhouseheaders_check: headers_install
104988181ec3SSam Ravnborg	$(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
1050c95fa08aSSam Ravnborg	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
105168475359SDavid Woodhouse
10528d730cfbSDavid Woodhouse# ---------------------------------------------------------------------------
10531da177e4SLinus Torvalds# Modules
10541da177e4SLinus Torvalds
10551da177e4SLinus Torvaldsifdef CONFIG_MODULES
10561da177e4SLinus Torvalds
10571da177e4SLinus Torvalds# By default, build modules as well
10581da177e4SLinus Torvalds
105973d1393eSMichal Marekall: modules
10601da177e4SLinus Torvalds
10611da177e4SLinus Torvalds#	Build modules
1062551559e1STejun Heo#
1063551559e1STejun Heo#	A module can be listed more than once in obj-m resulting in
1064551559e1STejun Heo#	duplicate lines in modules.order files.  Those are removed
1065551559e1STejun Heo#	using awk while concatenating to the final file.
10661da177e4SLinus Torvalds
10674f193362SPaul SmithPHONY += modules
10682da30e70SMichal Marekmodules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
1069551559e1STejun Heo	$(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1070fd54f502SMike Frysinger	@$(kecho) '  Building modules, stage 2.';
1071b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
107244463f7dSDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
10731da177e4SLinus Torvalds
1074a6c36632SMichal Marekmodules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1075a6c36632SMichal Marek	$(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1076a6c36632SMichal Marek
107773d1393eSMichal Marek%/modules.builtin: include/config/auto.conf
1078a6c36632SMichal Marek	$(Q)$(MAKE) $(modbuiltin)=$*
1079a6c36632SMichal Marek
10801da177e4SLinus Torvalds
10811da177e4SLinus Torvalds# Target to prepare building external modules
10824f193362SPaul SmithPHONY += modules_prepare
10835bb78269SSam Ravnborgmodules_prepare: prepare scripts
10841da177e4SLinus Torvalds
10851da177e4SLinus Torvalds# Target to install modules
10864f193362SPaul SmithPHONY += modules_install
10871da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post
10881da177e4SLinus Torvalds
10894f193362SPaul SmithPHONY += _modinst_
10902da30e70SMichal Marek_modinst_:
1091ce454d4dSTom Rini	@if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
10921da177e4SLinus Torvalds		echo "Warning: you may need to install module-init-tools"; \
10931da177e4SLinus Torvalds		echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
10941da177e4SLinus Torvalds		sleep 1; \
10951da177e4SLinus Torvalds	fi
10961da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
10971da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
10981da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
10991da177e4SLinus Torvalds	@ln -s $(srctree) $(MODLIB)/source
11001da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
11011da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
11021da177e4SLinus Torvalds		ln -s $(objtree) $(MODLIB)/build ; \
11031da177e4SLinus Torvalds	fi
1104551559e1STejun Heo	@cp -f $(objtree)/modules.order $(MODLIB)/
1105bc081dd6SMichal Marek	@cp -f $(objtree)/modules.builtin $(MODLIB)/
1106b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
11071da177e4SLinus Torvalds
110850a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial
11091da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write.  However the
11101da177e4SLinus Torvalds# boot script depmod is the master version.
11114f193362SPaul SmithPHONY += _modinst_post
11121da177e4SLinus Torvalds_modinst_post: _modinst_
111388ecf814SDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
111450a8ec31SSam Ravnborg	$(call cmd,depmod)
11151da177e4SLinus Torvalds
11161da177e4SLinus Torvaldselse # CONFIG_MODULES
11171da177e4SLinus Torvalds
11181da177e4SLinus Torvalds# Modules not configured
11191da177e4SLinus Torvalds# ---------------------------------------------------------------------------
11201da177e4SLinus Torvalds
11211da177e4SLinus Torvaldsmodules modules_install: FORCE
11221da177e4SLinus Torvalds	@echo
11231da177e4SLinus Torvalds	@echo "The present kernel configuration has modules disabled."
11241da177e4SLinus Torvalds	@echo "Type 'make config' and enable loadable module support."
11251da177e4SLinus Torvalds	@echo "Then build a kernel with module support enabled."
11261da177e4SLinus Torvalds	@echo
11271da177e4SLinus Torvalds	@exit 1
11281da177e4SLinus Torvalds
11291da177e4SLinus Torvaldsendif # CONFIG_MODULES
11301da177e4SLinus Torvalds
11311da177e4SLinus Torvalds###
11321da177e4SLinus Torvalds# Cleaning is done on three levels.
11331da177e4SLinus Torvalds# make clean     Delete most generated files
11341da177e4SLinus Torvalds#                Leave enough to build external modules
11351da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
11361da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
11371da177e4SLinus Torvalds
11381da177e4SLinus Torvalds# Directories & files removed with 'make clean'
11391da177e4SLinus TorvaldsCLEAN_DIRS  += $(MODVERDIR)
11401da177e4SLinus TorvaldsCLEAN_FILES +=	vmlinux System.map \
11411da177e4SLinus Torvalds                .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
11421da177e4SLinus Torvalds
11431da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
114496f13045SSam RavnborgMRPROPER_DIRS  += include/config usr/include include/generated
1145f7f16b77SSam RavnborgMRPROPER_FILES += .config .config.old .version .old_version             \
1146264a2683SSam Ravnborg                  include/linux/version.h                               \
1147f4ed1009SJianbin Kang		  Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
11481da177e4SLinus Torvalds
11491da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
11501da177e4SLinus Torvalds#
11511da177e4SLinus Torvaldsclean: rm-dirs  := $(CLEAN_DIRS)
11521da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
1153c47f214aSMichal Marekclean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation)
11541da177e4SLinus Torvalds
11554f193362SPaul SmithPHONY += $(clean-dirs) clean archclean
11561da177e4SLinus Torvalds$(clean-dirs):
11571da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
11581da177e4SLinus Torvalds
115988d7be03SMichal Marekclean: archclean
11601da177e4SLinus Torvalds
11611da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
11621da177e4SLinus Torvalds#
11631da177e4SLinus Torvaldsmrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
11641da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
11651da177e4SLinus Torvaldsmrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
11661da177e4SLinus Torvalds
11674f193362SPaul SmithPHONY += $(mrproper-dirs) mrproper archmrproper
11681da177e4SLinus Torvalds$(mrproper-dirs):
11691da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
11701da177e4SLinus Torvalds
11711da177e4SLinus Torvaldsmrproper: clean archmrproper $(mrproper-dirs)
11721da177e4SLinus Torvalds	$(call cmd,rmdirs)
11731da177e4SLinus Torvalds	$(call cmd,rmfiles)
11741da177e4SLinus Torvalds
11751da177e4SLinus Torvalds# distclean
11761da177e4SLinus Torvalds#
11774f193362SPaul SmithPHONY += distclean
11781da177e4SLinus Torvalds
11791da177e4SLinus Torvaldsdistclean: mrproper
11801da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
11811da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
11821da177e4SLinus Torvalds		-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
11831da177e4SLinus Torvalds		-o -name '.*.rej' -o -size 0 \
11841da177e4SLinus Torvalds		-o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
11851da177e4SLinus Torvalds		-type f -print | xargs rm -f
11861da177e4SLinus Torvalds
11871da177e4SLinus Torvalds
11881da177e4SLinus Torvalds# Packaging of the kernel to various formats
11891da177e4SLinus Torvalds# ---------------------------------------------------------------------------
11901da177e4SLinus Torvalds# rpm target kept for backward compatibility
11911da177e4SLinus Torvaldspackage-dir	:= $(srctree)/scripts/package
11921da177e4SLinus Torvalds
1193bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1194bafb6747SArnaldo Carvalho de Melo	$(Q)$(MAKE) $(build)=$(package-dir) $@
1195031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
11966c2133e1SSam Ravnborg	$(Q)$(MAKE) $(build)=$(package-dir) $@
1197031ecc6dSZach Brownrpm: include/config/kernel.release FORCE
11986c2133e1SSam Ravnborg	$(Q)$(MAKE) $(build)=$(package-dir) $@
11991da177e4SLinus Torvalds
12001da177e4SLinus Torvalds
12011da177e4SLinus Torvalds# Brief documentation of the typical targets used
12021da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12031da177e4SLinus Torvalds
12045dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
12051da177e4SLinus Torvaldsboards := $(notdir $(boards))
12065dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
12075dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
12081da177e4SLinus Torvalds
12091da177e4SLinus Torvaldshelp:
12101da177e4SLinus Torvalds	@echo  'Cleaning targets:'
12115ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
12125cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
12135ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
12145cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
12151da177e4SLinus Torvalds	@echo  ''
12161da177e4SLinus Torvalds	@echo  'Configuration targets:'
12171da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
12181da177e4SLinus Torvalds	@echo  ''
12191da177e4SLinus Torvalds	@echo  'Other generic targets:'
12201da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
12211da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
12221da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
12239cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
122488ecf814SDavid Woodhouse	@echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
122588ecf814SDavid Woodhouse	@echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
12261da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
122762718979SJoe Perches	@echo  '  dir/file.[oisS] - Build specified target only'
122862718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
122962718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1230155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1231c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
12321da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
12331da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1234f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
12356d128842SZach Brown	@echo  '  kernelrelease	  - Output the release version string'
1236cb58455cSSam Ravnborg	@echo  '  kernelversion	  - Output the version stored in Makefile'
12372fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
123859df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
12392fb9b1bdSSam Ravnborg	 echo  ''
12401da177e4SLinus Torvalds	@echo  'Static analysers'
12411da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
12421da177e4SLinus Torvalds	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1243aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1244ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1245295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
1246179efcb4SVegard Nossum	@echo  '  headers_check   - Sanity check on exported headers'
124774425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
124874425eeeSNicolas Palix	@$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
124974425eeeSNicolas Palix	@echo  ''
12501da177e4SLinus Torvalds	@echo  'Kernel packaging:'
12516c2133e1SSam Ravnborg	@$(MAKE) $(build)=$(package-dir) help
12521da177e4SLinus Torvalds	@echo  ''
12531da177e4SLinus Torvalds	@echo  'Documentation targets:'
12541da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
12551da177e4SLinus Torvalds	@echo  ''
125601dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
12571da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
125801dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
12591da177e4SLinus Torvalds	@echo  ''
12601da177e4SLinus Torvalds	@$(if $(boards), \
12611da177e4SLinus Torvalds		$(foreach b, $(boards), \
12621da177e4SLinus Torvalds		printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
12631da177e4SLinus Torvalds		echo '')
12645dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
12655dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
12665dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
12675dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
12685dffbe81SSegher Boessenkool		echo '')
12691da177e4SLinus Torvalds
12701da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
127145d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
12721da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1273701842e3SDustin Kirkland	@echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1274701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
12754a5838adSBorislav Petkov	@echo  '  make W=1   [targets] Enable extra gcc checks'
12761da177e4SLinus Torvalds	@echo  ''
12771da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
12781da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
12791da177e4SLinus Torvalds
12801da177e4SLinus Torvalds
12815dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
12825dffbe81SSegher Boessenkool
12835dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
12845dffbe81SSegher Boessenkool
12855dffbe81SSegher Boessenkoolboards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
12865dffbe81SSegher Boessenkool
12875dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
12885dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
12895dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
12905dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
12915dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
12925dffbe81SSegher Boessenkool		echo '')
12935dffbe81SSegher Boessenkool
12945dffbe81SSegher Boessenkool
12951da177e4SLinus Torvalds# Documentation targets
12961da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12971da177e4SLinus Torvalds%docs: scripts_basic FORCE
12981da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=Documentation/DocBook $@
12991da177e4SLinus Torvalds
13001da177e4SLinus Torvaldselse # KBUILD_EXTMOD
13011da177e4SLinus Torvalds
13021da177e4SLinus Torvalds###
13031da177e4SLinus Torvalds# External module support.
13041da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
13051da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
13061da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
13071da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
13081da177e4SLinus Torvalds# be used.
13091da177e4SLinus Torvalds#
13101da177e4SLinus Torvalds# The following are the only valid targets when building external
13111da177e4SLinus Torvalds# modules.
13121da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
13131da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
13141da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
13151da177e4SLinus Torvalds# make M=dir modules_install
1316070b98bfSSam Ravnborg#                      Install the modules built in the module directory
13171da177e4SLinus Torvalds#                      Assumes install directory is already created
13181da177e4SLinus Torvalds
13191da177e4SLinus Torvalds# We are always building modules
13201da177e4SLinus TorvaldsKBUILD_MODULES := 1
13214f193362SPaul SmithPHONY += crmodverdir
13221da177e4SLinus Torvaldscrmodverdir:
13237bb9d092SSam Ravnborg	$(cmd_crmodverdir)
13241da177e4SLinus Torvalds
13254f193362SPaul SmithPHONY += $(objtree)/Module.symvers
13261da177e4SLinus Torvalds$(objtree)/Module.symvers:
13271da177e4SLinus Torvalds	@test -e $(objtree)/Module.symvers || ( \
13281da177e4SLinus Torvalds	echo; \
13291da177e4SLinus Torvalds	echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
13301da177e4SLinus Torvalds	echo "           is missing; modules will have no dependencies and modversions."; \
13311da177e4SLinus Torvalds	echo )
13321da177e4SLinus Torvalds
13331da177e4SLinus Torvaldsmodule-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
13344f193362SPaul SmithPHONY += $(module-dirs) modules
13351da177e4SLinus Torvalds$(module-dirs): crmodverdir $(objtree)/Module.symvers
13361da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
13371da177e4SLinus Torvalds
13381da177e4SLinus Torvaldsmodules: $(module-dirs)
1339fd54f502SMike Frysinger	@$(kecho) '  Building modules, stage 2.';
1340b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
13411da177e4SLinus Torvalds
13424f193362SPaul SmithPHONY += modules_install
1343a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post
1344a67dc21aSSam Ravnborg
1345a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
13464f193362SPaul SmithPHONY += _emodinst_
1347a67dc21aSSam Ravnborg_emodinst_:
1348a67dc21aSSam Ravnborg	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1349b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
13501da177e4SLinus Torvalds
13514f193362SPaul SmithPHONY += _emodinst_post
1352a67dc21aSSam Ravnborg_emodinst_post: _emodinst_
1353a67dc21aSSam Ravnborg	$(call cmd,depmod)
1354a67dc21aSSam Ravnborg
13551da177e4SLinus Torvaldsclean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
13561da177e4SLinus Torvalds
13574f193362SPaul SmithPHONY += $(clean-dirs) clean
13581da177e4SLinus Torvalds$(clean-dirs):
13591da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
13601da177e4SLinus Torvalds
13611da177e4SLinus Torvaldsclean:	rm-dirs := $(MODVERDIR)
136288d7be03SMichal Marekclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
13631da177e4SLinus Torvalds
13641da177e4SLinus Torvaldshelp:
13651da177e4SLinus Torvalds	@echo  '  Building external modules.'
13661da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
13671da177e4SLinus Torvalds	@echo  ''
13681da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
13691da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
13701da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
13711da177e4SLinus Torvalds	@echo  ''
137206300b21SSam Ravnborg
137306300b21SSam Ravnborg# Dummies...
13744f193362SPaul SmithPHONY += prepare scripts
137506300b21SSam Ravnborgprepare: ;
137606300b21SSam Ravnborgscripts: ;
13771da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
13781da177e4SLinus Torvalds
137988d7be03SMichal Marekclean: $(clean-dirs)
138088d7be03SMichal Marek	$(call cmd,rmdirs)
138188d7be03SMichal Marek	$(call cmd,rmfiles)
138288d7be03SMichal Marek	@find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
138388d7be03SMichal Marek		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
138488d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
138588d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
138688d7be03SMichal Marek		-o -name modules.builtin -o -name '.tmp_*.o.*' \
138788d7be03SMichal Marek		-o -name '*.gcno' \) -type f -print | xargs rm -f
138888d7be03SMichal Marek
13891da177e4SLinus Torvalds# Generate tags for editors
13901da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1391a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1392a680eedcSSam Ravnborg      cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
13931da177e4SLinus Torvalds
1394f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
13951da177e4SLinus Torvalds	$(call cmd,tags)
13961da177e4SLinus Torvalds
13971da177e4SLinus Torvalds# Scripts to check various things for consistency
13981da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13991da177e4SLinus Torvalds
14001da177e4SLinus Torvaldsincludecheck:
14011da177e4SLinus Torvalds	find * $(RCS_FIND_IGNORE) \
14021da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
140380007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
14041da177e4SLinus Torvalds
14051da177e4SLinus Torvaldsversioncheck:
14061da177e4SLinus Torvalds	find * $(RCS_FIND_IGNORE) \
14071da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
140880007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
14091da177e4SLinus Torvalds
141074425eeeSNicolas Palixcoccicheck:
141174425eeeSNicolas Palix	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
141274425eeeSNicolas Palix
14131da177e4SLinus Torvaldsnamespacecheck:
14141da177e4SLinus Torvalds	$(PERL) $(srctree)/scripts/namespace.pl
14151da177e4SLinus Torvalds
1416295ac051SAdrian Bunkexport_report:
1417295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1418295ac051SAdrian Bunk
14191da177e4SLinus Torvaldsendif #ifeq ($(config-targets),1)
14201da177e4SLinus Torvaldsendif #ifeq ($(mixed-targets),1)
14211da177e4SLinus Torvalds
1422c30a02e0SRoman ZippelPHONY += checkstack kernelrelease kernelversion
1423e3ccf6e3SJeff Dike
1424011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1425011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1426011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1427011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1428011e3a9aSJeff Dikeifeq ($(ARCH), um)
1429011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1430011e3a9aSJeff Dikeelse
1431011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1432011e3a9aSJeff Dikeendif
14331da177e4SLinus Torvaldscheckstack:
14341da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1435011e3a9aSJeff Dike	$(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
14361da177e4SLinus Torvalds
14377b8ea53dSAmerigo Wangkernelrelease:
14387b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
143901ab1788SAmerigo Wang
1440cb58455cSSam Ravnborgkernelversion:
14412244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
14421da177e4SLinus Torvalds
144306300b21SSam Ravnborg# Single targets
144406300b21SSam Ravnborg# ---------------------------------------------------------------------------
1445bc2546a6SSam Ravnborg# Single targets are compatible with:
1446e1b8513dSRobert P. J. Day# - build with mixed source and output
1447bc2546a6SSam Ravnborg# - build with separate output dir 'make O=...'
1448bc2546a6SSam Ravnborg# - external modules
1449bc2546a6SSam Ravnborg#
1450bc2546a6SSam Ravnborg#  target-dir => where to store outputfile
1451bc2546a6SSam Ravnborg#  build-dir  => directory in kernel source tree to use
145206300b21SSam Ravnborg
145306300b21SSam Ravnborgifeq ($(KBUILD_EXTMOD),)
1454aa360879SSam Ravnborg        build-dir  = $(patsubst %/,%,$(dir $@))
1455bc2546a6SSam Ravnborg        target-dir = $(dir $@)
145606300b21SSam Ravnborgelse
145706300b21SSam Ravnborg        zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1458bc2546a6SSam Ravnborg        build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1459bc2546a6SSam Ravnborg        target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
146006300b21SSam Ravnborgendif
146106300b21SSam Ravnborg
1462bc2546a6SSam Ravnborg%.s: %.c prepare scripts FORCE
1463bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1464bc2546a6SSam Ravnborg%.i: %.c prepare scripts FORCE
1465bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1466bc2546a6SSam Ravnborg%.o: %.c prepare scripts FORCE
1467bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1468bc2546a6SSam Ravnborg%.lst: %.c prepare scripts FORCE
1469bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1470bc2546a6SSam Ravnborg%.s: %.S prepare scripts FORCE
1471bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1472bc2546a6SSam Ravnborg%.o: %.S prepare scripts FORCE
1473bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
147415fde675SAndreas Gruenbacher%.symtypes: %.c prepare scripts FORCE
147515fde675SAndreas Gruenbacher	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1476bc2546a6SSam Ravnborg
1477bc2546a6SSam Ravnborg# Modules
147831110ebbSSam Ravnborg/: prepare scripts FORCE
147931110ebbSSam Ravnborg	$(cmd_crmodverdir)
148031110ebbSSam Ravnborg	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
148131110ebbSSam Ravnborg	$(build)=$(build-dir)
148231110ebbSSam Ravnborg%/: prepare scripts FORCE
14837bb9d092SSam Ravnborg	$(cmd_crmodverdir)
148406300b21SSam Ravnborg	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1485bc2546a6SSam Ravnborg	$(build)=$(build-dir)
1486bc2546a6SSam Ravnborg%.ko: prepare scripts FORCE
14877bb9d092SSam Ravnborg	$(cmd_crmodverdir)
148806300b21SSam Ravnborg	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1489bc2546a6SSam Ravnborg	$(build)=$(build-dir) $(@:.ko=.o)
1490b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
149106300b21SSam Ravnborg
14921da177e4SLinus Torvalds# FIXME Should go into a make.lib or something
14931da177e4SLinus Torvalds# ===========================================================================
14941da177e4SLinus Torvalds
14951da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
14961da177e4SLinus Torvalds      cmd_rmdirs = rm -rf $(rm-dirs)
14971da177e4SLinus Torvalds
14981da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
14991da177e4SLinus Torvalds      cmd_rmfiles = rm -f $(rm-files)
15001da177e4SLinus Torvalds
1501bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable
150250a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
150350a8ec31SSam Ravnborg      cmd_depmod = \
1504d8d2e78aSSam Ravnborg	if [ -r System.map -a -x $(DEPMOD) ]; then                              \
150550a8ec31SSam Ravnborg		$(DEPMOD) -ae -F System.map                                     \
150675bccd88SGilles Espinasse		$(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) )     \
150750a8ec31SSam Ravnborg		$(KERNELRELEASE);                                               \
150850a8ec31SSam Ravnborg	fi
150950a8ec31SSam Ravnborg
15107bb9d092SSam Ravnborg# Create temporary dir for module support files
1511ab19f879SSam Ravnborg# clean it up only when building all modules
1512ab19f879SSam Ravnborgcmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1513ab19f879SSam Ravnborg                  $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
15141da177e4SLinus Torvalds
1515222d394dSSam Ravnborga_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
151680c00ba9SSam Ravnborg	  $(KBUILD_AFLAGS_KERNEL)                              \
1517d8672b40SSam Ravnborg	  $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
15185e8d780dSSam Ravnborg	  $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
15191da177e4SLinus Torvalds
15201da177e4SLinus Torvaldsquiet_cmd_as_o_S = AS      $@
15211da177e4SLinus Torvaldscmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
15221da177e4SLinus Torvalds
15231da177e4SLinus Torvalds# read all saved command lines
15241da177e4SLinus Torvalds
15251da177e4SLinus Torvaldstargets := $(wildcard $(sort $(targets)))
15261da177e4SLinus Torvaldscmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
15271da177e4SLinus Torvalds
15281da177e4SLinus Torvaldsifneq ($(cmd_files),)
15291da177e4SLinus Torvalds  $(cmd_files): ;	# Do not try to update included dependency files
15301da177e4SLinus Torvalds  include $(cmd_files)
15311da177e4SLinus Torvaldsendif
15321da177e4SLinus Torvalds
15331da177e4SLinus Torvalds# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
15341da177e4SLinus Torvalds# Usage:
15351da177e4SLinus Torvalds# $(Q)$(MAKE) $(clean)=dir
15361da177e4SLinus Torvaldsclean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
15371da177e4SLinus Torvalds
15381da177e4SLinus Torvaldsendif	# skip-makefile
15391da177e4SLinus Torvalds
15404f193362SPaul SmithPHONY += FORCE
15411da177e4SLinus TorvaldsFORCE:
15424f193362SPaul Smith
15434f193362SPaul Smith# Declare the contents of the .PHONY variable as phony.  We keep that
1544fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
15454f193362SPaul Smith.PHONY: $(PHONY)
1546