xref: /openbmc/linux/Makefile (revision 19583ca5)
155922c9dSLinus TorvaldsVERSION = 3
27171511eSLinus TorvaldsPATCHLEVEL = 16
355922c9dSLinus TorvaldsSUBLEVEL = 0
4*19583ca5SLinus TorvaldsEXTRAVERSION =
538dbfb59SLinus TorvaldsNAME = Shuffling Zombie Juror
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
25ab7474eaSBorislav Petkov# Avoid interference with shell env settings
26ab7474eaSBorislav Petkovunexport GREP_OPTIONS
27ab7474eaSBorislav Petkov
281da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking
291da177e4SLinus Torvalds# to get the ordering right.
301da177e4SLinus Torvalds#
311da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in
321da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on
331da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often
341da177e4SLinus Torvalds# unavoidable when linking the built-in.o targets which finally
351da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and
361da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir
371da177e4SLinus Torvalds# is now up to date.
381da177e4SLinus Torvalds#
391da177e4SLinus Torvalds# The only cases where we need to modify files which have global
401da177e4SLinus Torvalds# effects are thus separated out and done before the recursive
411da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the
421da177e4SLinus Torvalds# prepare rule.
431da177e4SLinus Torvalds
44066b7ed9SMichal Marek# Beautify output
45066b7ed9SMichal Marek# ---------------------------------------------------------------------------
46066b7ed9SMichal Marek#
47066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making
48066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set
49066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g.
50066b7ed9SMichal Marek#
51066b7ed9SMichal Marek#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
52066b7ed9SMichal Marek#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
53066b7ed9SMichal Marek#
54066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed.
55066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed.
56066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since
57066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist.
58066b7ed9SMichal Marek#
59066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful
60066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode.
61066b7ed9SMichal Marek#
62066b7ed9SMichal Marek#	$(Q)ln $@ :<
63066b7ed9SMichal Marek#
64066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
65066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed.
66066b7ed9SMichal Marek#
671da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
681da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
691da177e4SLinus Torvalds
701da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
711da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
721da177e4SLinus Torvaldsendif
731da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
741da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
751da177e4SLinus Torvaldsendif
761da177e4SLinus Torvalds
77066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1)
78066b7ed9SMichal Marek  quiet =
79066b7ed9SMichal Marek  Q =
80066b7ed9SMichal Marekelse
81066b7ed9SMichal Marek  quiet=quiet_
82066b7ed9SMichal Marek  Q = @
83066b7ed9SMichal Marekendif
84066b7ed9SMichal Marek
85066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
86066b7ed9SMichal Marek# commands
87066b7ed9SMichal Marek
88066b7ed9SMichal Marekifneq ($(filter 4.%,$(MAKE_VERSION)),)	# make-4
89066b7ed9SMichal Marekifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
90066b7ed9SMichal Marek  quiet=silent_
91066b7ed9SMichal Marekendif
92066b7ed9SMichal Marekelse					# make-3.8x
93066b7ed9SMichal Marekifneq ($(filter s% -s%,$(MAKEFLAGS)),)
94066b7ed9SMichal Marek  quiet=silent_
95066b7ed9SMichal Marekendif
96066b7ed9SMichal Marekendif
97066b7ed9SMichal Marek
98066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
99066b7ed9SMichal Marek
1001c7bafe7SRobert P. J. Day# Call a source code checker (by default, "sparse") as part of the
1011c7bafe7SRobert P. J. Day# C compilation.
1021c7bafe7SRobert P. J. Day#
1031c7bafe7SRobert P. J. Day# Use 'make C=1' to enable checking of only re-compiled files.
1041c7bafe7SRobert P. J. Day# Use 'make C=2' to enable checking of *all* source files, regardless
1051c7bafe7SRobert P. J. Day# of whether they are re-compiled or not.
1061c7bafe7SRobert P. J. Day#
1071c7bafe7SRobert P. J. Day# See the file "Documentation/sparse.txt" for more details, including
1081c7bafe7SRobert P. J. Day# where to get the "sparse" utility.
1091da177e4SLinus Torvalds
1101da177e4SLinus Torvaldsifeq ("$(origin C)", "command line")
1111da177e4SLinus Torvalds  KBUILD_CHECKSRC = $(C)
1121da177e4SLinus Torvaldsendif
1131da177e4SLinus Torvaldsifndef KBUILD_CHECKSRC
1141da177e4SLinus Torvalds  KBUILD_CHECKSRC = 0
1151da177e4SLinus Torvaldsendif
1161da177e4SLinus Torvalds
1171da177e4SLinus Torvalds# Use make M=dir to specify directory of external module to build
1181da177e4SLinus Torvalds# Old syntax make ... SUBDIRS=$PWD is still supported
1191da177e4SLinus Torvalds# Setting the environment variable KBUILD_EXTMOD take precedence
1201da177e4SLinus Torvaldsifdef SUBDIRS
1211da177e4SLinus Torvalds  KBUILD_EXTMOD ?= $(SUBDIRS)
1221da177e4SLinus Torvaldsendif
123b8b0618cSCheng Renquan
1241da177e4SLinus Torvaldsifeq ("$(origin M)", "command line")
1251da177e4SLinus Torvalds  KBUILD_EXTMOD := $(M)
1261da177e4SLinus Torvaldsendif
1271da177e4SLinus Torvalds
1281da177e4SLinus Torvalds# kbuild supports saving output files in a separate directory.
1291da177e4SLinus Torvalds# To locate output files in a separate directory two syntaxes are supported.
1301da177e4SLinus Torvalds# In both cases the working directory must be the root of the kernel src.
1311da177e4SLinus Torvalds# 1) O=
1321da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
1331da177e4SLinus Torvalds#
1341da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
1351da177e4SLinus Torvalds# Set the environment variable KBUILD_OUTPUT to point to the directory
1361da177e4SLinus Torvalds# where the output files shall be placed.
1371da177e4SLinus Torvalds# export KBUILD_OUTPUT=dir/to/store/output/files/
1381da177e4SLinus Torvalds# make
1391da177e4SLinus Torvalds#
1401da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
1411da177e4SLinus Torvalds# variable.
1421da177e4SLinus Torvalds
1431da177e4SLinus Torvalds
1441da177e4SLinus Torvalds# KBUILD_SRC is set on invocation of make in OBJ directory
1451da177e4SLinus Torvalds# KBUILD_SRC is not intended to be used by the regular user (for now)
1461da177e4SLinus Torvaldsifeq ($(KBUILD_SRC),)
1471da177e4SLinus Torvalds
1481da177e4SLinus Torvalds# OK, Make called in directory where kernel src resides
1491da177e4SLinus Torvalds# Do we want to locate output files in a separate directory?
1501da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
1511da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
1521da177e4SLinus Torvaldsendif
1531da177e4SLinus Torvalds
1541da177e4SLinus Torvalds# That's our default target when none is given on the command line
1554f193362SPaul SmithPHONY := _all
1561da177e4SLinus Torvalds_all:
1571da177e4SLinus Torvalds
1581cacc9abSSam Ravnborg# Cancel implicit rules on top Makefile
1591cacc9abSSam Ravnborg$(CURDIR)/Makefile Makefile: ;
1601cacc9abSSam Ravnborg
1611da177e4SLinus Torvaldsifneq ($(KBUILD_OUTPUT),)
1621da177e4SLinus Torvalds# Invoke a second make in the output directory, passing relevant variables
1631da177e4SLinus Torvalds# check that the output directory actually exists
1641da177e4SLinus Torvaldssaved-output := $(KBUILD_OUTPUT)
1651c9e70a5SMasahiro YamadaKBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
1661c9e70a5SMasahiro Yamada								&& /bin/pwd)
1671da177e4SLinus Torvalds$(if $(KBUILD_OUTPUT),, \
1681c9e70a5SMasahiro Yamada     $(error failed to create output directory "$(saved-output)"))
1691da177e4SLinus Torvalds
1700b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make
1710b35786dSMilton Miller
1721cacc9abSSam Ravnborg$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
17316f89098SCharles Keepax	@:
1740b35786dSMilton Miller
175c2e28dc9SMichal Marek# Fake the "Entering directory" message once, so that IDEs/editors are
176c2e28dc9SMichal Marek# able to understand relative filenames.
177066b7ed9SMichal Marek       echodir := @echo
178066b7ed9SMichal Marek quiet_echodir := @echo
179066b7ed9SMichal Mareksilent_echodir := @:
1800b35786dSMilton Millersub-make: FORCE
181066b7ed9SMichal Marek	$($(quiet)echodir) "make[1]: Entering directory \`$(KBUILD_OUTPUT)'"
1821da177e4SLinus Torvalds	$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
18323a45e2cSSam Ravnborg	KBUILD_SRC=$(CURDIR) \
1840b35786dSMilton Miller	KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
1850b35786dSMilton Miller	$(filter-out _all sub-make,$(MAKECMDGOALS))
1861da177e4SLinus Torvalds
1871da177e4SLinus Torvalds# Leave processing to above invocation of make
1881da177e4SLinus Torvaldsskip-makefile := 1
1891da177e4SLinus Torvaldsendif # ifneq ($(KBUILD_OUTPUT),)
1901da177e4SLinus Torvaldsendif # ifeq ($(KBUILD_SRC),)
1911da177e4SLinus Torvalds
1921da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
1931da177e4SLinus Torvaldsifeq ($(skip-makefile),)
1941da177e4SLinus Torvalds
1951da177e4SLinus Torvalds# If building an external module we do not care about the all: rule
1961da177e4SLinus Torvalds# but instead _all depend on modules
1974f193362SPaul SmithPHONY += all
1981da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1991da177e4SLinus Torvalds_all: all
2001da177e4SLinus Torvaldselse
2011da177e4SLinus Torvalds_all: modules
2021da177e4SLinus Torvaldsendif
2031da177e4SLinus Torvalds
2049da0763bSMichal Marekifeq ($(KBUILD_SRC),)
2059da0763bSMichal Marek        # building in the source tree
2069da0763bSMichal Marek        srctree := .
2079da0763bSMichal Marekelse
2089da0763bSMichal Marek        ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
2099da0763bSMichal Marek                # building in a subdirectory of the source tree
2109da0763bSMichal Marek                srctree := ..
2119da0763bSMichal Marek        else
2129da0763bSMichal Marek                srctree := $(KBUILD_SRC)
2139da0763bSMichal Marek        endif
2149da0763bSMichal Marekendif
2157e1c0477SMichal Marekobjtree		:= .
2161da177e4SLinus Torvaldssrc		:= $(srctree)
2171da177e4SLinus Torvaldsobj		:= $(objtree)
2181da177e4SLinus Torvalds
2190f558c33SMattia DongiliVPATH		:= $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
2201da177e4SLinus Torvalds
22111294235SAmerigo Wangexport srctree objtree VPATH
2221da177e4SLinus Torvalds
2231da177e4SLinus Torvalds
2241da177e4SLinus Torvalds# SUBARCH tells the usermode build what the underlying arch is.  That is set
2251da177e4SLinus Torvalds# first, and if a usermode build is happening, the "ARCH=um" on the command
2261da177e4SLinus Torvalds# line overrides the setting of ARCH below.  If a native build is happening,
2271da177e4SLinus Torvalds# then ARCH is assigned, getting whatever value it gets normally, and
2281da177e4SLinus Torvalds# SUBARCH is subsequently ignored.
2291da177e4SLinus Torvalds
230ffee0de4SDavid WoodhouseSUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
231ffee0de4SDavid Woodhouse				  -e s/sun4u/sparc64/ \
2321da177e4SLinus Torvalds				  -e s/arm.*/arm/ -e s/sa110/arm/ \
23339990b5eSLinus Torvalds				  -e s/s390x/s390/ -e s/parisc64/parisc/ \
234236b1957SPaul Mundt				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
235f1b99392SWill Deacon				  -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
2361da177e4SLinus Torvalds
2371da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
2381da177e4SLinus Torvalds# ---------------------------------------------------------------------------
2391da177e4SLinus Torvalds#
2401da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
2411da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
2421da177e4SLinus Torvalds# ARCH can be set during invocation of make:
2431da177e4SLinus Torvalds# make ARCH=ia64
2441da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
2451da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
2461da177e4SLinus Torvalds
2471da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
2481da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
2491da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
2501da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
2511da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
2521da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
25384336466SRoland McGrath# A third alternative is to store a setting in .config so that plain
25484336466SRoland McGrath# "make" in the configured kernel build directory always uses that.
2551da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
2561da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
2572331d1a6SSam RavnborgARCH		?= $(SUBARCH)
25884336466SRoland McGrathCROSS_COMPILE	?= $(CONFIG_CROSS_COMPILE:"%"=%)
2591da177e4SLinus Torvalds
2601da177e4SLinus Torvalds# Architecture as present in compile.h
2611da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
2626752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
2631da177e4SLinus Torvalds
264d746d647SSam Ravnborg# Additional ARCH settings for x86
265d746d647SSam Ravnborgifeq ($(ARCH),i386)
266d746d647SSam Ravnborg        SRCARCH := x86
267d746d647SSam Ravnborgendif
268d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
269d746d647SSam Ravnborg        SRCARCH := x86
270d746d647SSam Ravnborgendif
27174b469f2SSam Ravnborg
2725e538790SSam Ravnborg# Additional ARCH settings for sparc
273e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
274e69f58c0SNamhyung Kim       SRCARCH := sparc
275e69f58c0SNamhyung Kimendif
276a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
2775e538790SSam Ravnborg       SRCARCH := sparc
278a439fe51SSam Ravnborgendif
2792fb9b1bdSSam Ravnborg
2803cc000b5SPaul Mundt# Additional ARCH settings for sh
2813cc000b5SPaul Mundtifeq ($(ARCH),sh64)
2823cc000b5SPaul Mundt       SRCARCH := sh
2833cc000b5SPaul Mundtendif
2843cc000b5SPaul Mundt
28518aecc2bSChris Metcalf# Additional ARCH settings for tile
2866738d321SChris Metcalfifeq ($(ARCH),tilepro)
2876738d321SChris Metcalf       SRCARCH := tile
2886738d321SChris Metcalfendif
28918aecc2bSChris Metcalfifeq ($(ARCH),tilegx)
29018aecc2bSChris Metcalf       SRCARCH := tile
29118aecc2bSChris Metcalfendif
29218aecc2bSChris Metcalf
2935e538790SSam Ravnborg# Where to locate arch specific headers
2945e538790SSam Ravnborghdr-arch  := $(SRCARCH)
2955e538790SSam Ravnborg
29614cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
29741263fc6SBen Gardinerexport KCONFIG_CONFIG
29814cdd3c4SRoman Zippel
2991da177e4SLinus Torvalds# SHELL used by kbuild
3001da177e4SLinus TorvaldsCONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
3011da177e4SLinus Torvalds	  else if [ -x /bin/bash ]; then echo /bin/bash; \
3021da177e4SLinus Torvalds	  else echo sh; fi ; fi)
3031da177e4SLinus Torvalds
3041da177e4SLinus TorvaldsHOSTCC       = gcc
3051da177e4SLinus TorvaldsHOSTCXX      = g++
30625583d4bSJosh TriplettHOSTCFLAGS   = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
3071da177e4SLinus TorvaldsHOSTCXXFLAGS = -O2
3081da177e4SLinus Torvalds
30961163efaSBehan Websterifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
31061163efaSBehan WebsterHOSTCFLAGS  += -Wno-unused-value -Wno-unused-parameter \
31161163efaSBehan Webster		-Wno-missing-field-initializers -fno-delete-null-pointer-checks
31261163efaSBehan Websterendif
31361163efaSBehan Webster
3141da177e4SLinus Torvalds# Decide whether to build built-in, modular, or both.
3151da177e4SLinus Torvalds# Normally, just do built-in.
3161da177e4SLinus Torvalds
3171da177e4SLinus TorvaldsKBUILD_MODULES :=
3181da177e4SLinus TorvaldsKBUILD_BUILTIN := 1
3191da177e4SLinus Torvalds
3201da177e4SLinus Torvalds# If we have only "make modules", don't compile built-in objects.
3211da177e4SLinus Torvalds# When we're building modules with modversions, we need to consider
3221da177e4SLinus Torvalds# the built-in objects during the descend as well, in order to
3231da177e4SLinus Torvalds# make sure the checksums are up to date before we record them.
3241da177e4SLinus Torvalds
3251da177e4SLinus Torvaldsifeq ($(MAKECMDGOALS),modules)
3261da177e4SLinus Torvalds  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
3271da177e4SLinus Torvaldsendif
3281da177e4SLinus Torvalds
3291da177e4SLinus Torvalds# If we have "make <whatever> modules", compile modules
3301da177e4SLinus Torvalds# in addition to whatever we do anyway.
3311da177e4SLinus Torvalds# Just "make" or "make all" shall build modules as well
3321da177e4SLinus Torvalds
3331da177e4SLinus Torvaldsifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
3341da177e4SLinus Torvalds  KBUILD_MODULES := 1
3351da177e4SLinus Torvaldsendif
3361da177e4SLinus Torvalds
3371da177e4SLinus Torvaldsifeq ($(MAKECMDGOALS),)
3381da177e4SLinus Torvalds  KBUILD_MODULES := 1
3391da177e4SLinus Torvaldsendif
3401da177e4SLinus Torvalds
341e579d351SSam Ravnborgexport KBUILD_MODULES KBUILD_BUILTIN
3421da177e4SLinus Torvaldsexport KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
3431da177e4SLinus Torvalds
34461163efaSBehan Websterifneq ($(CC),)
34561163efaSBehan Websterifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)
34661163efaSBehan WebsterCOMPILER := clang
34761163efaSBehan Websterelse
34861163efaSBehan WebsterCOMPILER := gcc
34961163efaSBehan Websterendif
35061163efaSBehan Websterexport COMPILER
35161163efaSBehan Websterendif
3521da177e4SLinus Torvalds
3531da177e4SLinus Torvalds# Look for make include files relative to root of kernel src
3541da177e4SLinus TorvaldsMAKEFLAGS += --include-dir=$(srctree)
3551da177e4SLinus Torvalds
3561cacc9abSSam Ravnborg# We need some generic definitions (do not try to remake the file).
3571cacc9abSSam Ravnborg$(srctree)/scripts/Kbuild.include: ;
3582a691470SSam Ravnborginclude $(srctree)/scripts/Kbuild.include
3598ec4b4ffSSam Ravnborg
3601da177e4SLinus Torvalds# Make variables (CC, etc...)
3611da177e4SLinus TorvaldsAS		= $(CROSS_COMPILE)as
3621da177e4SLinus TorvaldsLD		= $(CROSS_COMPILE)ld
3631da177e4SLinus TorvaldsCC		= $(CROSS_COMPILE)gcc
3641da177e4SLinus TorvaldsCPP		= $(CC) -E
3651da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
3661da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
3671da177e4SLinus TorvaldsSTRIP		= $(CROSS_COMPILE)strip
3681da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
3691da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
3701da177e4SLinus TorvaldsAWK		= awk
3711da177e4SLinus TorvaldsGENKSYMS	= scripts/genksyms/genksyms
372caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
3731da177e4SLinus TorvaldsDEPMOD		= /sbin/depmod
3741da177e4SLinus TorvaldsPERL		= perl
3751da177e4SLinus TorvaldsCHECK		= sparse
3761da177e4SLinus Torvalds
37780a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
37880a7d1d9SHannes Eder		  -Wbitwise -Wno-return-void $(CF)
3796588169dSSam RavnborgCFLAGS_MODULE   =
3806588169dSSam RavnborgAFLAGS_MODULE   =
3816588169dSSam RavnborgLDFLAGS_MODULE  =
3821da177e4SLinus TorvaldsCFLAGS_KERNEL	=
3831da177e4SLinus TorvaldsAFLAGS_KERNEL	=
3842521f2c2SPeter OberparleiterCFLAGS_GCOV	= -fprofile-arcs -ftest-coverage
3851da177e4SLinus Torvalds
3861da177e4SLinus Torvalds
387abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
388abbf1590SDavid HowellsUSERINCLUDE    := \
389abbf1590SDavid Howells		-I$(srctree)/arch/$(hdr-arch)/include/uapi \
390abbf1590SDavid Howells		-Iarch/$(hdr-arch)/include/generated/uapi \
391abbf1590SDavid Howells		-I$(srctree)/include/uapi \
392abbf1590SDavid Howells		-Iinclude/generated/uapi \
393abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
394abbf1590SDavid Howells
3951da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
3961da177e4SLinus Torvalds# Needed to be compatible with the O= option
397abbf1590SDavid HowellsLINUXINCLUDE    := \
398abbf1590SDavid Howells		-I$(srctree)/arch/$(hdr-arch)/include \
399abbf1590SDavid Howells		-Iarch/$(hdr-arch)/include/generated \
40096f13045SSam Ravnborg		$(if $(KBUILD_SRC), -I$(srctree)/include) \
401abbf1590SDavid Howells		-Iinclude \
402abbf1590SDavid Howells		$(USERINCLUDE)
4031da177e4SLinus Torvalds
404d8672b40SSam RavnborgKBUILD_CPPFLAGS := -D__KERNEL__
4051da177e4SLinus Torvalds
406a0f97e06SSam RavnborgKBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
40794bed2a9SDave Jones		   -fno-strict-aliasing -fno-common \
408a8735821SFloris Kraak		   -Werror-implicit-function-declaration \
409a1c48bb1SGeert Uytterhoeven		   -Wno-format-security
410a1c48bb1SGeert Uytterhoeven
41180c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
41280c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
413222d394dSSam RavnborgKBUILD_AFLAGS   := -D__ASSEMBLY__
4146588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
4156588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
4166588169dSSam RavnborgKBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
4171da177e4SLinus Torvalds
418f1d28fb0SRoman Zippel# Read KERNELRELEASE from include/config/kernel.release (if it exists)
419f1d28fb0SRoman ZippelKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
420cacd54efSMichal MarekKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
421cb58455cSSam Ravnborg
422070b98bfSSam Ravnborgexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
42380ef88d6SSam Ravnborgexport ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
424caa27b66SSam Ravnborgexport CPP AR NM STRIP OBJCOPY OBJDUMP
425caa27b66SSam Ravnborgexport MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
426070b98bfSSam Ravnborgexport HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
4271da177e4SLinus Torvalds
42806c5040cSSam Ravnborgexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
4292521f2c2SPeter Oberparleiterexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
430222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
4316588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
43280c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
43340df759eSMichal Marekexport KBUILD_ARFLAGS
4341da177e4SLinus Torvalds
4351da177e4SLinus Torvalds# When compiling out-of-tree modules, put MODVERDIR in the module
4361da177e4SLinus Torvalds# tree rather than in the kernel tree. The kernel tree might
4371da177e4SLinus Torvalds# even be read-only.
4381da177e4SLinus Torvaldsexport MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
4391da177e4SLinus Torvalds
4401da177e4SLinus Torvalds# Files to ignore in find ... statements
4411da177e4SLinus Torvalds
442ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
443ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
444ae63b2d7SPrarit Bhargava			  -prune -o
445450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
446450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
4471da177e4SLinus Torvalds
4481da177e4SLinus Torvalds# ===========================================================================
4491da177e4SLinus Torvalds# Rules shared between *config targets and build targets
4501da177e4SLinus Torvalds
4511da177e4SLinus Torvalds# Basic helpers built in scripts/
4524f193362SPaul SmithPHONY += scripts_basic
4531da177e4SLinus Torvaldsscripts_basic:
4541da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
455638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
4561da177e4SLinus Torvalds
457cd05e6bdSJan Beulich# To avoid any implicit rule to kick in, define an empty command.
458cd05e6bdSJan Beulichscripts/basic/%: scripts_basic ;
459cd05e6bdSJan Beulich
4604f193362SPaul SmithPHONY += outputmakefile
461fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
462fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
463fd5f0cd6SJan Beulich# output directory.
4641da177e4SLinus Torvaldsoutputmakefile:
465fd5f0cd6SJan Beulichifneq ($(KBUILD_SRC),)
46692979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
467fd5f0cd6SJan Beulich	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
468fd5f0cd6SJan Beulich	    $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
469fd5f0cd6SJan Beulichendif
4701da177e4SLinus Torvalds
471d8ecc5cdSSam Ravnborg# Support for using generic headers in asm-generic
472d8ecc5cdSSam RavnborgPHONY += asm-generic
473d8ecc5cdSSam Ravnborgasm-generic:
474d8ecc5cdSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
4753c5994c8SCatalin Marinas	            src=asm obj=arch/$(SRCARCH)/include/generated/asm
4763c5994c8SCatalin Marinas	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
4773c5994c8SCatalin Marinas	            src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
478d8ecc5cdSSam Ravnborg
4791da177e4SLinus Torvalds# To make sure we do not include .config for any of the *config targets
4801da177e4SLinus Torvalds# catch them early, and hand them over to scripts/kconfig/Makefile
4811da177e4SLinus Torvalds# It is allowed to specify more targets when calling make, including
4821da177e4SLinus Torvalds# mixing *config targets and build targets.
4831da177e4SLinus Torvalds# For example 'make oldconfig all'.
4841da177e4SLinus Torvalds# Detect when mixed targets is specified, and make a second invocation
4851da177e4SLinus Torvalds# of make so .config is not included in this case either (for *config).
4861da177e4SLinus Torvalds
48710b63956SDavid Howellsversion_h := include/generated/uapi/linux/version.h
488d183e6f5SDavid Howells
4893eb3c740SRoman Zippelno-dot-config-targets := clean mrproper distclean \
490f4ed1009SJianbin Kang			 cscope gtags TAGS tags help %docs check% coccicheck \
491d183e6f5SDavid Howells			 $(version_h) headers_% archheaders archscripts \
4924aed2fd8SLinus Torvalds			 kernelversion %src-pkg
4931da177e4SLinus Torvalds
4941da177e4SLinus Torvaldsconfig-targets := 0
4951da177e4SLinus Torvaldsmixed-targets  := 0
4961da177e4SLinus Torvaldsdot-config     := 1
4971da177e4SLinus Torvalds
4981da177e4SLinus Torvaldsifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
4991da177e4SLinus Torvalds	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
5001da177e4SLinus Torvalds		dot-config := 0
5011da177e4SLinus Torvalds	endif
5021da177e4SLinus Torvaldsendif
5031da177e4SLinus Torvalds
5041da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
5051da177e4SLinus Torvalds        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
5061da177e4SLinus Torvalds                config-targets := 1
5071da177e4SLinus Torvalds                ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
5081da177e4SLinus Torvalds                        mixed-targets := 1
5091da177e4SLinus Torvalds                endif
5101da177e4SLinus Torvalds        endif
5111da177e4SLinus Torvaldsendif
5121da177e4SLinus Torvalds
5131da177e4SLinus Torvaldsifeq ($(mixed-targets),1)
5141da177e4SLinus Torvalds# ===========================================================================
5151da177e4SLinus Torvalds# We're called with mixed targets (*config and build targets).
5161da177e4SLinus Torvalds# Handle them one by one.
5171da177e4SLinus Torvalds
5189319f453SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
5199319f453SMasahiro Yamada
5209319f453SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
5219319f453SMasahiro Yamada	@:
5229319f453SMasahiro Yamada
5239319f453SMasahiro Yamada__build_one_by_one:
5249319f453SMasahiro Yamada	$(Q)set -e; \
5259319f453SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
5269319f453SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
5279319f453SMasahiro Yamada	done
5281da177e4SLinus Torvalds
5291da177e4SLinus Torvaldselse
5301da177e4SLinus Torvaldsifeq ($(config-targets),1)
5311da177e4SLinus Torvalds# ===========================================================================
5321da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
5331da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
5341da177e4SLinus Torvalds
5351da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
5361da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
5371da177e4SLinus Torvalds# used for 'make defconfig'
53874b469f2SSam Ravnborginclude $(srctree)/arch/$(SRCARCH)/Makefile
53961bee204SAl Viroexport KBUILD_DEFCONFIG KBUILD_KCONFIG
5401da177e4SLinus Torvalds
54131110ebbSSam Ravnborgconfig: scripts_basic outputmakefile FORCE
54231110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
54331110ebbSSam Ravnborg
54431110ebbSSam Ravnborg%config: scripts_basic outputmakefile FORCE
5451da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
5461da177e4SLinus Torvalds
5471da177e4SLinus Torvaldselse
5481da177e4SLinus Torvalds# ===========================================================================
5491da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
5501da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
5511da177e4SLinus Torvalds
5521da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
5531da177e4SLinus Torvalds# Additional helpers built in scripts/
5541da177e4SLinus Torvalds# Carefully list dependencies so we do not try to build scripts twice
555070b98bfSSam Ravnborg# in parallel
5564f193362SPaul SmithPHONY += scripts
557a54292f5SAndreas Schwabscripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
558a54292f5SAndreas Schwab	 asm-generic
5591da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=$(@)
5601da177e4SLinus Torvalds
5611da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
5621da177e4SLinus Torvaldsinit-y		:= init/
5634d2acfbfSDavid Woodhousedrivers-y	:= drivers/ sound/ firmware/
5641da177e4SLinus Torvaldsnet-y		:= net/
5651da177e4SLinus Torvaldslibs-y		:= lib/
5661da177e4SLinus Torvaldscore-y		:= usr/
5671da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
5681da177e4SLinus Torvalds
5691da177e4SLinus Torvaldsifeq ($(dot-config),1)
5709ee4e336SSam Ravnborg# Read in config
5719ee4e336SSam Ravnborg-include include/config/auto.conf
5721da177e4SLinus Torvalds
5739ee4e336SSam Ravnborgifeq ($(KBUILD_EXTMOD),)
5741da177e4SLinus Torvalds# Read in dependencies to all Kconfig* files, make sure to run
5751da177e4SLinus Torvalds# oldconfig if changes are detected.
576c955ccafSRoman Zippel-include include/config/auto.conf.cmd
5771da177e4SLinus Torvalds
5781da177e4SLinus Torvalds# To avoid any implicit rule to kick in, define an empty command
57914cdd3c4SRoman Zippel$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
5801da177e4SLinus Torvalds
581c955ccafSRoman Zippel# If .config is newer than include/config/auto.conf, someone tinkered
582752625cfSSam Ravnborg# with it and forgot to run make oldconfig.
583070b98bfSSam Ravnborg# if auto.conf.cmd is missing then we are probably in a cleaned tree so
584752625cfSSam Ravnborg# we execute the config step to be sure to catch updated Kconfig files
585bc081dd6SMichal Marekinclude/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
5861da177e4SLinus Torvalds	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
5871da177e4SLinus Torvaldselse
588264a2683SSam Ravnborg# external modules needs include/generated/autoconf.h and include/config/auto.conf
5899ee4e336SSam Ravnborg# but do not care if they are up-to-date. Use auto.conf to trigger the test
5909ee4e336SSam RavnborgPHONY += include/config/auto.conf
5919ee4e336SSam Ravnborg
5929ee4e336SSam Ravnborginclude/config/auto.conf:
593264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
5945369f550SMichal Marek	echo >&2;							\
5955369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
5965369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
5975369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
5985369f550SMichal Marek	echo >&2 ;							\
5999ee4e336SSam Ravnborg	/bin/false)
6009ee4e336SSam Ravnborg
6019ee4e336SSam Ravnborgendif # KBUILD_EXTMOD
602c955ccafSRoman Zippel
6031da177e4SLinus Torvaldselse
6041da177e4SLinus Torvalds# Dummy target needed, because used as prerequisite
605c955ccafSRoman Zippelinclude/config/auto.conf: ;
6069ee4e336SSam Ravnborgendif # $(dot-config)
6071da177e4SLinus Torvalds
6081da177e4SLinus Torvalds# The all: target is the default when no target is given on the
6091da177e4SLinus Torvalds# command line.
6101da177e4SLinus Torvalds# This allow a user to issue only 'make' to build a kernel including modules
611c8447161SMichal Marek# Defaults to vmlinux, but the arch makefile usually adds further targets
6121da177e4SLinus Torvaldsall: vmlinux
6131da177e4SLinus Torvalds
614a1c48bb1SGeert Uytterhoeveninclude $(srctree)/arch/$(SRCARCH)/Makefile
615a1c48bb1SGeert Uytterhoeven
616a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
617a1c48bb1SGeert Uytterhoeven
6181da177e4SLinus Torvaldsifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
619e74fc973SArnd BergmannKBUILD_CFLAGS	+= -Os $(call cc-disable-warning,maybe-uninitialized,)
6201da177e4SLinus Torvaldselse
621a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -O2
6221da177e4SLinus Torvaldsendif
6231da177e4SLinus Torvalds
6241873e870SAndi Kleenifdef CONFIG_READABLE_ASM
6251873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
6261873e870SAndi Kleen# reorder blocks reorders the control in the function
6271873e870SAndi Kleen# ipa clone creates specialized cloned functions
6281873e870SAndi Kleen# partial inlining inlines only parts of functions
6291873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
6301873e870SAndi Kleen                 $(call cc-option,-fno-ipa-cp-clone,) \
6311873e870SAndi Kleen                 $(call cc-option,-fno-partial-inlining)
6321873e870SAndi Kleenendif
6331873e870SAndi Kleen
63408f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
63535bb5b1eSAndi KleenKBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
63635bb5b1eSAndi Kleenendif
63735bb5b1eSAndi Kleen
63819952a92SKees Cook# Handle stack protector mode.
6398779657dSKees Cookifdef CONFIG_CC_STACKPROTECTOR_REGULAR
64019952a92SKees Cook  stackp-flag := -fstack-protector
64119952a92SKees Cook  ifeq ($(call cc-option, $(stackp-flag)),)
6426c15b327SJan Beulich    $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
64327b2a49aSFathi Boudra             -fstack-protector not supported by compiler)
6445d707e9cSTejun Heo  endif
6456c15b327SJan Beulichelse
6466c15b327SJan Beulichifdef CONFIG_CC_STACKPROTECTOR_STRONG
6478779657dSKees Cook  stackp-flag := -fstack-protector-strong
6488779657dSKees Cook  ifeq ($(call cc-option, $(stackp-flag)),)
6498779657dSKees Cook    $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
6508779657dSKees Cook	      -fstack-protector-strong not supported by compiler)
6518779657dSKees Cook  endif
65219952a92SKees Cookelse
65319952a92SKees Cook  # Force off for distro compilers that enable stack protector by default.
65419952a92SKees Cook  stackp-flag := $(call cc-option, -fno-stack-protector)
65519952a92SKees Cookendif
6566c15b327SJan Beulichendif
65719952a92SKees CookKBUILD_CFLAGS += $(stackp-flag)
658e06b8b98SSam Ravnborg
65961163efaSBehan Websterifeq ($(COMPILER),clang)
66061163efaSBehan WebsterKBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
66161163efaSBehan WebsterKBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
66261163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
66361163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
66461163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, gnu)
66561163efaSBehan Webster# Quiet clang warning: comparison of unsigned expression < 0 is always false
66661163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
66761163efaSBehan Webster# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
66861163efaSBehan Webster# source of a reference will be _MergedGlobals and not on of the whitelisted names.
66961163efaSBehan Webster# See modpost pattern 2
67061163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
67161163efaSBehan Websterelse
67261163efaSBehan Webster
673af0e5d56SDave Jones# This warning generated too much noise in a regular build.
674af0e5d56SDave Jones# Use make W=1 to enable this warning (see scripts/Makefile.build)
6758417da6fSMichal MarekKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
67661163efaSBehan Websterendif
677af0e5d56SDave Jones
6781da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
679a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
6801da177e4SLinus Torvaldselse
6817e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
6827e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
6837e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
6847e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
6857e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
6867e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
687a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
6881da177e4SLinus Torvaldsendif
6897e9501fdSRabin Vincentendif
6901da177e4SLinus Torvalds
6912062afb4SLinus TorvaldsKBUILD_CFLAGS   += $(call cc-option, -fno-var-tracking-assignments)
6922062afb4SLinus Torvalds
6931da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
694a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -g
6952288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
6961da177e4SLinus Torvaldsendif
6971da177e4SLinus Torvalds
698d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
699e82c4bb8SAndi KleenKBUILD_CFLAGS 	+= $(call cc-option, -femit-struct-debug-baseonly) \
700e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
701d6f4ceb7SAndi Kleenendif
702d6f4ceb7SAndi Kleen
703606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
704a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
705a2546faeSSteven RostedtCC_USING_FENTRY	:= $(call cc-option, -mfentry -DCC_USING_FENTRY)
706a2546faeSSteven Rostedtendif
707a2546faeSSteven RostedtKBUILD_CFLAGS	+= -pg $(CC_USING_FENTRY)
708a2546faeSSteven RostedtKBUILD_AFLAGS	+= $(CC_USING_FENTRY)
70972441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE
710cf4db259SSteven Rostedt	ifdef CONFIG_HAVE_C_RECORDMCOUNT
71172441cb1SSteven Rostedt		BUILD_C_RECORDMCOUNT := y
71272441cb1SSteven Rostedt		export BUILD_C_RECORDMCOUNT
71372441cb1SSteven Rostedt	endif
71472441cb1SSteven Rostedtendif
71516444a8aSArnaldo Carvalho de Meloendif
71616444a8aSArnaldo Carvalho de Melo
71791341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
71891341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
71991341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
72091341d4bSSam Ravnborgendif
72191341d4bSSam Ravnborg
722e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
723e8f5bdb0SRik van RielNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
724e8e69931SSam RavnborgCHECKFLAGS     += $(NOSTDINC_FLAGS)
725e8e69931SSam Ravnborg
7261da177e4SLinus Torvalds# warn about C99 declaration after statement
727a0f97e06SSam RavnborgKBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
7281da177e4SLinus Torvalds
729070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
7308417da6fSMichal MarekKBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
7311da177e4SLinus Torvalds
732fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
733a137802eSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
734d0115552SLinus Torvalds
7358f7f5c9fSAndi Kleen# conserve stack if available
7368f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
7378f7f5c9fSAndi Kleen
73880970472SSergei Trofimovich# disallow errors like 'EXPORT_GPL(foo);' with missing header
73980970472SSergei TrofimovichKBUILD_CFLAGS   += $(call cc-option,-Werror=implicit-int)
74080970472SSergei Trofimovich
74180970472SSergei Trofimovich# require functions to have arguments in prototypes, not empty 'int foo()'
74280970472SSergei TrofimovichKBUILD_CFLAGS   += $(call cc-option,-Werror=strict-prototypes)
74380970472SSergei Trofimovich
744fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
745fe7c36c7SJosh TriplettKBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
746fe7c36c7SJosh Triplett
74740df759eSMichal Marek# use the deterministic mode of AR if available
74840df759eSMichal MarekKBUILD_ARFLAGS := $(call ar-option,D)
74940df759eSMichal Marek
750bf5438fcSJason Baron# check for 'asm goto'
751bf5438fcSJason Baronifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
752bf5438fcSJason Baron	KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
753bf5438fcSJason Baronendif
754bf5438fcSJason Baron
755a86fe353SMasahiro Yamadainclude $(srctree)/scripts/Makefile.extrawarn
756a86fe353SMasahiro Yamada
75706c5040cSSam Ravnborg# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
75869ee0b35SSam RavnborgKBUILD_CPPFLAGS += $(KCPPFLAGS)
75969ee0b35SSam RavnborgKBUILD_AFLAGS += $(KAFLAGS)
76069ee0b35SSam RavnborgKBUILD_CFLAGS += $(KCFLAGS)
76152bcc330SSam Ravnborg
76218991197SRoland McGrath# Use --build-id when available.
76318991197SRoland McGrathLDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
764f86fd306SSam Ravnborg			      $(call cc-ldoption, -Wl$(comma)--build-id,))
7656588169dSSam RavnborgKBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
76618991197SRoland McGrathLDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
76718991197SRoland McGrath
7685d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
769d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
7705d7d18f5SDavid Howellsendif
7715d7d18f5SDavid Howells
7721da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
7731da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
7741da177e4SLinus Torvalds# set in the environment
7751da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
7761da177e4SLinus Torvalds# this default value
7771da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
7781da177e4SLinus Torvalds
7791da177e4SLinus Torvalds#
7801da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
7811da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
7821da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
7831da177e4SLinus Torvalds
7841da177e4SLinus Torvalds#
785f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
786f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
787f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
788f4d4ffc0SJason Cooper#
789f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
790f4d4ffc0SJason Cooper
791f4d4ffc0SJason Cooper#
7921da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
7931da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
794070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
7951da177e4SLinus Torvalds#
7961da177e4SLinus Torvalds
797df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
7981da177e4SLinus Torvaldsexport MODLIB
7991da177e4SLinus Torvalds
800ac031f26STheodore Ts'o#
8012ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be
8022ea03891SSam Ravnborg# stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
8032ea03891SSam Ravnborg# the default option --strip-debug will be used.  Otherwise,
804177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command.
8052ea03891SSam Ravnborg
806ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP
807ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1)
8082ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug
809ac031f26STheodore Ts'oelse
8102ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
811ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1
812ac031f26STheodore Ts'oelse
8132ea03891SSam Ravnborgmod_strip_cmd = true
814ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP
815ac031f26STheodore Ts'oexport mod_strip_cmd
816ac031f26STheodore Ts'o
8171bf49dd4SP J P# Select initial ramdisk compression format, default is gzip(1).
8181bf49dd4SP J P# This shall be used by the dracut(8) tool while creating an initramfs image.
8191bf49dd4SP J P#
8207ac18156SJan BeulichINITRD_COMPRESS-y                  := gzip
8217ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
8227ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZMA)  := lzma
8237ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_XZ)    := xz
8247ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZO)   := lzo
8257ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZ4)   := lz4
826b7000adeSLinus Torvalds# do not export INITRD_COMPRESS, since we didn't actually
827b7000adeSLinus Torvalds# choose a sane default compression above.
828b7000adeSLinus Torvalds# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
8291da177e4SLinus Torvalds
830d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL
831e2a666d5SRusty RussellMODSECKEY = ./signing_key.priv
832e2a666d5SRusty RussellMODPUBKEY = ./signing_key.x509
833e2a666d5SRusty Russellexport MODPUBKEY
8344bc9410cSMichal Marekmod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
835e2a666d5SRusty Russellelse
836e2a666d5SRusty Russellmod_sign_cmd = true
837e2a666d5SRusty Russellendif
838e2a666d5SRusty Russellexport mod_sign_cmd
839e2a666d5SRusty Russell
840e2a666d5SRusty Russell
8411da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
8423a65dfe8SJens Axboecore-y		+= kernel/ mm/ fs/ ipc/ security/ crypto/ block/
8431da177e4SLinus Torvalds
8441da177e4SLinus Torvaldsvmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
8451da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
8461da177e4SLinus Torvalds		     $(net-y) $(net-m) $(libs-y) $(libs-m)))
8471da177e4SLinus Torvalds
8481da177e4SLinus Torvaldsvmlinux-alldirs	:= $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
8491da177e4SLinus Torvalds		     $(init-n) $(init-) \
8501da177e4SLinus Torvalds		     $(core-n) $(core-) $(drivers-n) $(drivers-) \
8511da177e4SLinus Torvalds		     $(net-n)  $(net-)  $(libs-n)    $(libs-))))
8521da177e4SLinus Torvalds
8531da177e4SLinus Torvaldsinit-y		:= $(patsubst %/, %/built-in.o, $(init-y))
8541da177e4SLinus Torvaldscore-y		:= $(patsubst %/, %/built-in.o, $(core-y))
8551da177e4SLinus Torvaldsdrivers-y	:= $(patsubst %/, %/built-in.o, $(drivers-y))
8561da177e4SLinus Torvaldsnet-y		:= $(patsubst %/, %/built-in.o, $(net-y))
8571da177e4SLinus Torvaldslibs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))
8581da177e4SLinus Torvaldslibs-y2		:= $(patsubst %/, %/built-in.o, $(libs-y))
8591da177e4SLinus Torvaldslibs-y		:= $(libs-y1) $(libs-y2)
8601da177e4SLinus Torvalds
8611f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
86295698570SSam Ravnborgexport KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
86395698570SSam Ravnborgexport KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
86495698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
8651f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux
8666615d6c3SMichal Marek# used by scripts/pacmage/Makefile
8676615d6c3SMichal Marekexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
8681da177e4SLinus Torvalds
8691f2bfbd0SSam Ravnborgvmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
8701da177e4SLinus Torvalds
8711f2bfbd0SSam Ravnborg# Final link of vmlinux
8721f2bfbd0SSam Ravnborg      cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
8731f2bfbd0SSam Ravnborgquiet_cmd_link-vmlinux = LINK    $@
8741da177e4SLinus Torvalds
8751f2bfbd0SSam Ravnborg# Include targets which we want to
8761f2bfbd0SSam Ravnborg# execute if the rest of the kernel build went well.
8771f2bfbd0SSam Ravnborgvmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
8780f836e5fSDavid Woodhouseifdef CONFIG_HEADERS_CHECK
8790e7af8d0SDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
8800f836e5fSDavid Woodhouseendif
881267c4025SMathieu Desnoyersifdef CONFIG_SAMPLES
882267c4025SMathieu Desnoyers	$(Q)$(MAKE) $(build)=samples
883267c4025SMathieu Desnoyersendif
8843794f3e8SRandy Dunlapifdef CONFIG_BUILD_DOCSRC
8853794f3e8SRandy Dunlap	$(Q)$(MAKE) $(build)=Documentation
8863794f3e8SRandy Dunlapendif
8871f2bfbd0SSam Ravnborg	+$(call if_changed,link-vmlinux)
888741f98feSSam Ravnborg
8891da177e4SLinus Torvalds# The actual objects are generated when descending,
8901da177e4SLinus Torvalds# make sure no implicit rule kicks in
8911f2bfbd0SSam Ravnborg$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
8921da177e4SLinus Torvalds
8931da177e4SLinus Torvalds# Handle descending into subdirectories listed in $(vmlinux-dirs)
8941da177e4SLinus Torvalds# Preset locale variables to speed up the build process. Limit locale
8951da177e4SLinus Torvalds# tweaks to this spot to avoid wrong language settings when running
8961da177e4SLinus Torvalds# make menuconfig etc.
8971da177e4SLinus Torvalds# Error messages still appears in the original language
8981da177e4SLinus Torvalds
8994f193362SPaul SmithPHONY += $(vmlinux-dirs)
9005bb78269SSam Ravnborg$(vmlinux-dirs): prepare scripts
9011da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=$@
9021da177e4SLinus Torvalds
9030d0e7718SMichal Marekdefine filechk_kernel.release
9040d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
9050d0e7718SMichal Marekendef
9060d0e7718SMichal Marek
90783a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
908f1d28fb0SRoman Zippelinclude/config/kernel.release: include/config/auto.conf FORCE
9090d0e7718SMichal Marek	$(call filechk,kernel.release)
910cb58455cSSam Ravnborg
911cb58455cSSam Ravnborg
9121da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
9135bb78269SSam Ravnborg# or the modules are listed in "prepare".
9145bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
9155bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
9165bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
9171da177e4SLinus Torvalds
9185bb78269SSam Ravnborg# Listed in dependency order
9194f193362SPaul SmithPHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
9205bb78269SSam Ravnborg
92186feeaa8SSam Ravnborg# prepare3 is used to check if we are building in a separate output directory,
9221da177e4SLinus Torvalds# and if so do:
9231da177e4SLinus Torvalds# 1) Check that make has not been executed in the kernel src $(srctree)
924f1d28fb0SRoman Zippelprepare3: include/config/kernel.release
9251da177e4SLinus Torvaldsifneq ($(KBUILD_SRC),)
926fd54f502SMike Frysinger	@$(kecho) '  Using $(srctree) as source for kernel'
927c955ccafSRoman Zippel	$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
9285369f550SMichal Marek		echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \
9295369f550SMichal Marek		echo >&2 "  in the '$(srctree)' directory.";\
9301da177e4SLinus Torvalds		/bin/false; \
9311da177e4SLinus Torvalds	fi;
9321da177e4SLinus Torvaldsendif
9331da177e4SLinus Torvalds
93486feeaa8SSam Ravnborg# prepare2 creates a makefile if using a separate output directory
935d8ecc5cdSSam Ravnborgprepare2: prepare3 outputmakefile asm-generic
9361da177e4SLinus Torvalds
937d183e6f5SDavid Howellsprepare1: prepare2 $(version_h) include/generated/utsrelease.h \
938f7f16b77SSam Ravnborg                   include/config/auto.conf
9397bb9d092SSam Ravnborg	$(cmd_crmodverdir)
9401da177e4SLinus Torvalds
9416520fe55SH. Peter Anvinarchprepare: archheaders archscripts prepare1 scripts_basic
9425bb78269SSam Ravnborg
9435bb78269SSam Ravnborgprepare0: archprepare FORCE
9448d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
94586feeaa8SSam Ravnborg
9461da177e4SLinus Torvalds# All the preparing..
947d395efb5SRobert P. J. Dayprepare: prepare0
9481da177e4SLinus Torvalds
9491da177e4SLinus Torvalds# Generate some files
9501da177e4SLinus Torvalds# ---------------------------------------------------------------------------
9511da177e4SLinus Torvalds
9521da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
9531da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
9541da177e4SLinus Torvalds
9551da177e4SLinus Torvaldsuts_len := 64
95663104eecSSam Ravnborgdefine filechk_utsrelease.h
9571da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
9581da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
9591da177e4SLinus Torvalds	  exit 1;                                                         \
9601da177e4SLinus Torvalds	fi;                                                               \
96163104eecSSam Ravnborg	(echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
9621da177e4SLinus Torvaldsendef
9631da177e4SLinus Torvalds
96463104eecSSam Ravnborgdefine filechk_version.h
96563104eecSSam Ravnborg	(echo \#define LINUX_VERSION_CODE $(shell                         \
96678d3bb44SMichal Marek	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
96763104eecSSam Ravnborg	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
96863104eecSSam Ravnborgendef
96963104eecSSam Ravnborg
970d183e6f5SDavid Howells$(version_h): $(srctree)/Makefile FORCE
9711da177e4SLinus Torvalds	$(call filechk,version.h)
9721da177e4SLinus Torvalds
973273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
97463104eecSSam Ravnborg	$(call filechk,utsrelease.h)
97563104eecSSam Ravnborg
976179efcb4SVegard NossumPHONY += headerdep
977179efcb4SVegard Nossumheaderdep:
9789663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
9799663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
980179efcb4SVegard Nossum
9811da177e4SLinus Torvalds# ---------------------------------------------------------------------------
9821da177e4SLinus Torvalds
9834f193362SPaul SmithPHONY += depend dep
9841da177e4SLinus Torvaldsdepend dep:
9851da177e4SLinus Torvalds	@echo '*** Warning: make $@ is unnecessary now.'
9861da177e4SLinus Torvalds
9871da177e4SLinus Torvalds# ---------------------------------------------------------------------------
98888ecf814SDavid Woodhouse# Firmware install
98988ecf814SDavid WoodhouseINSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
99088ecf814SDavid Woodhouseexport INSTALL_FW_PATH
99188ecf814SDavid Woodhouse
99288ecf814SDavid WoodhousePHONY += firmware_install
99388ecf814SDavid Woodhousefirmware_install: FORCE
99488ecf814SDavid Woodhouse	@mkdir -p $(objtree)/firmware
99588ecf814SDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
99688ecf814SDavid Woodhouse
99788ecf814SDavid Woodhouse# ---------------------------------------------------------------------------
9988d730cfbSDavid Woodhouse# Kernel headers
9998d730cfbSDavid Woodhouse
1000e6883b18SSam Ravnborg#Default location for installed headers
1001e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1002e6883b18SSam Ravnborg
1003e6883b18SSam Ravnborghdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
10042fb9b1bdSSam Ravnborg
10052fb9b1bdSSam Ravnborg# If we do an all arch process set dst to asm-$(hdr-arch)
10062fb9b1bdSSam Ravnborghdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1007e6883b18SSam Ravnborg
1008052ad274SH. Peter AnvinPHONY += archheaders
1009052ad274SH. Peter Anvinarchheaders:
1010052ad274SH. Peter Anvin
10116520fe55SH. Peter AnvinPHONY += archscripts
10126520fe55SH. Peter Anvinarchscripts:
10136520fe55SH. Peter Anvin
1014e6883b18SSam RavnborgPHONY += __headers
1015d183e6f5SDavid Howells__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
1016e1b702cfSMike Waychison	$(Q)$(MAKE) $(build)=scripts build_unifdef
10176d716275SDavid Woodhouse
10186d716275SDavid WoodhousePHONY += headers_install_all
10192fb9b1bdSSam Ravnborgheaders_install_all:
10202fb9b1bdSSam Ravnborg	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
10216d716275SDavid Woodhouse
10228d730cfbSDavid WoodhousePHONY += headers_install
1023e6883b18SSam Ravnborgheaders_install: __headers
102410b63956SDavid Howells	$(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
10252fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
102610b63956SDavid Howells	$(Q)$(MAKE) $(hdr-inst)=include/uapi
102710b63956SDavid Howells	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
10288d730cfbSDavid Woodhouse
10291f85712eSMike FrysingerPHONY += headers_check_all
10301f85712eSMike Frysingerheaders_check_all: headers_install_all
10312fb9b1bdSSam Ravnborg	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
10321f85712eSMike Frysinger
103368475359SDavid WoodhousePHONY += headers_check
103468475359SDavid Woodhouseheaders_check: headers_install
103510b63956SDavid Howells	$(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
103610b63956SDavid Howells	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
103768475359SDavid Woodhouse
10388d730cfbSDavid Woodhouse# ---------------------------------------------------------------------------
10391da177e4SLinus Torvalds# Modules
10401da177e4SLinus Torvalds
10411da177e4SLinus Torvaldsifdef CONFIG_MODULES
10421da177e4SLinus Torvalds
10431da177e4SLinus Torvalds# By default, build modules as well
10441da177e4SLinus Torvalds
104573d1393eSMichal Marekall: modules
10461da177e4SLinus Torvalds
10471da177e4SLinus Torvalds# Build modules
1048551559e1STejun Heo#
1049551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1050551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1051551559e1STejun Heo# using awk while concatenating to the final file.
10521da177e4SLinus Torvalds
10534f193362SPaul SmithPHONY += modules
10542da30e70SMichal Marekmodules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
1055551559e1STejun Heo	$(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1056fd54f502SMike Frysinger	@$(kecho) '  Building modules, stage 2.';
1057b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
105844463f7dSDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
10591da177e4SLinus Torvalds
1060a6c36632SMichal Marekmodules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1061a6c36632SMichal Marek	$(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1062a6c36632SMichal Marek
106373d1393eSMichal Marek%/modules.builtin: include/config/auto.conf
1064a6c36632SMichal Marek	$(Q)$(MAKE) $(modbuiltin)=$*
1065a6c36632SMichal Marek
10661da177e4SLinus Torvalds
10671da177e4SLinus Torvalds# Target to prepare building external modules
10684f193362SPaul SmithPHONY += modules_prepare
10695bb78269SSam Ravnborgmodules_prepare: prepare scripts
10701da177e4SLinus Torvalds
10711da177e4SLinus Torvalds# Target to install modules
10724f193362SPaul SmithPHONY += modules_install
10731da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post
10741da177e4SLinus Torvalds
10754f193362SPaul SmithPHONY += _modinst_
10762da30e70SMichal Marek_modinst_:
10771da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
10781da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
10791da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
1080890676c6SMichal Marek	@ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
10811da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
10821da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
10837e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
10841da177e4SLinus Torvalds	fi
1085551559e1STejun Heo	@cp -f $(objtree)/modules.order $(MODLIB)/
1086bc081dd6SMichal Marek	@cp -f $(objtree)/modules.builtin $(MODLIB)/
1087b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
10881da177e4SLinus Torvalds
108950a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial
10901da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write.  However the
10911da177e4SLinus Torvalds# boot script depmod is the master version.
10924f193362SPaul SmithPHONY += _modinst_post
10936d128e1eSLinus Torvalds_modinst_post: _modinst_
109488ecf814SDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
109550a8ec31SSam Ravnborg	$(call cmd,depmod)
10961da177e4SLinus Torvalds
1097d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y)
1098d890f510SJosh BoyerPHONY += modules_sign
1099d890f510SJosh Boyermodules_sign:
1100d890f510SJosh Boyer	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1101d890f510SJosh Boyerendif
1102d890f510SJosh Boyer
11031da177e4SLinus Torvaldselse # CONFIG_MODULES
11041da177e4SLinus Torvalds
11051da177e4SLinus Torvalds# Modules not configured
11061da177e4SLinus Torvalds# ---------------------------------------------------------------------------
11071da177e4SLinus Torvalds
11081da177e4SLinus Torvaldsmodules modules_install: FORCE
11095369f550SMichal Marek	@echo >&2
11105369f550SMichal Marek	@echo >&2 "The present kernel configuration has modules disabled."
11115369f550SMichal Marek	@echo >&2 "Type 'make config' and enable loadable module support."
11125369f550SMichal Marek	@echo >&2 "Then build a kernel with module support enabled."
11135369f550SMichal Marek	@echo >&2
11141da177e4SLinus Torvalds	@exit 1
11151da177e4SLinus Torvalds
11161da177e4SLinus Torvaldsendif # CONFIG_MODULES
11171da177e4SLinus Torvalds
11181da177e4SLinus Torvalds###
11191da177e4SLinus Torvalds# Cleaning is done on three levels.
11201da177e4SLinus Torvalds# make clean     Delete most generated files
11211da177e4SLinus Torvalds#                Leave enough to build external modules
11221da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
11231da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
11241da177e4SLinus Torvalds
11251da177e4SLinus Torvalds# Directories & files removed with 'make clean'
11261da177e4SLinus TorvaldsCLEAN_DIRS  += $(MODVERDIR)
11271da177e4SLinus Torvalds
11281da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
1129d8ecc5cdSSam RavnborgMRPROPER_DIRS  += include/config usr/include include/generated          \
113079192ca8SJason Cooper		  arch/*/include/generated .tmp_objdiff
1131d183e6f5SDavid HowellsMRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
1132d5b71936SRusty Russell		  Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1133d5b71936SRusty Russell		  signing_key.priv signing_key.x509 x509.genkey		\
1134d5b71936SRusty Russell		  extra_certificates signing_key.x509.keyid		\
11359c8cdb71SPaul Gortmaker		  signing_key.x509.signer include/linux/version.h
11361da177e4SLinus Torvalds
11371da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
11381da177e4SLinus Torvalds#
11391da177e4SLinus Torvaldsclean: rm-dirs  := $(CLEAN_DIRS)
11401da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
1141fb68d4beSGerard Snitselaarclean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
11421da177e4SLinus Torvalds
1143bd1ee804SPawel MollPHONY += $(clean-dirs) clean archclean vmlinuxclean
11441da177e4SLinus Torvalds$(clean-dirs):
11451da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
11461da177e4SLinus Torvalds
1147bd1ee804SPawel Mollvmlinuxclean:
1148bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1149bd1ee804SPawel Moll
1150bd1ee804SPawel Mollclean: archclean vmlinuxclean
11511da177e4SLinus Torvalds
11521da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
11531da177e4SLinus Torvalds#
11541da177e4SLinus Torvaldsmrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
11551da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
11561da177e4SLinus Torvaldsmrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
11571da177e4SLinus Torvalds
11584f193362SPaul SmithPHONY += $(mrproper-dirs) mrproper archmrproper
11591da177e4SLinus Torvalds$(mrproper-dirs):
11601da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
11611da177e4SLinus Torvalds
11621da177e4SLinus Torvaldsmrproper: clean archmrproper $(mrproper-dirs)
11631da177e4SLinus Torvalds	$(call cmd,rmdirs)
11641da177e4SLinus Torvalds	$(call cmd,rmfiles)
11651da177e4SLinus Torvalds
11661da177e4SLinus Torvalds# distclean
11671da177e4SLinus Torvalds#
11684f193362SPaul SmithPHONY += distclean
11691da177e4SLinus Torvalds
11701da177e4SLinus Torvaldsdistclean: mrproper
11711da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
11721da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
11731da177e4SLinus Torvalds		-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1174a03fcb50SMasahiro Yamada		-o -name '.*.rej' -o -name '*%'  -o -name 'core' \) \
11751da177e4SLinus Torvalds		-type f -print | xargs rm -f
11761da177e4SLinus Torvalds
11771da177e4SLinus Torvalds
11781da177e4SLinus Torvalds# Packaging of the kernel to various formats
11791da177e4SLinus Torvalds# ---------------------------------------------------------------------------
11801da177e4SLinus Torvalds# rpm target kept for backward compatibility
1181c79624c1SMichal Marekpackage-dir	:= scripts/package
11821da177e4SLinus Torvalds
1183bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1184bafb6747SArnaldo Carvalho de Melo	$(Q)$(MAKE) $(build)=$(package-dir) $@
1185031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
11866c2133e1SSam Ravnborg	$(Q)$(MAKE) $(build)=$(package-dir) $@
1187031ecc6dSZach Brownrpm: include/config/kernel.release FORCE
11886c2133e1SSam Ravnborg	$(Q)$(MAKE) $(build)=$(package-dir) $@
11891da177e4SLinus Torvalds
11901da177e4SLinus Torvalds
11911da177e4SLinus Torvalds# Brief documentation of the typical targets used
11921da177e4SLinus Torvalds# ---------------------------------------------------------------------------
11931da177e4SLinus Torvalds
11945dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
11951da177e4SLinus Torvaldsboards := $(notdir $(boards))
11965dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
11975dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
11981da177e4SLinus Torvalds
11991da177e4SLinus Torvaldshelp:
12001da177e4SLinus Torvalds	@echo  'Cleaning targets:'
12015ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
12025cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
12035ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
12045cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
12051da177e4SLinus Torvalds	@echo  ''
12061da177e4SLinus Torvalds	@echo  'Configuration targets:'
12071da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
12081da177e4SLinus Torvalds	@echo  ''
12091da177e4SLinus Torvalds	@echo  'Other generic targets:'
12101da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
12111da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
12121da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
12139cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
121488ecf814SDavid Woodhouse	@echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
121588ecf814SDavid Woodhouse	@echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
12161da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
121762718979SJoe Perches	@echo  '  dir/file.[oisS] - Build specified target only'
121862718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
121962718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1220155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1221c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
12221da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
12231da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1224f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
12256d128842SZach Brown	@echo  '  kernelrelease	  - Output the release version string'
1226cb58455cSSam Ravnborg	@echo  '  kernelversion	  - Output the version stored in Makefile'
1227c398ff00SMike Marciniszyn	@echo  '  image_name	  - Output the image name'
12282fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
122959df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
12302fb9b1bdSSam Ravnborg	 echo  ''
12311da177e4SLinus Torvalds	@echo  'Static analysers'
12321da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
12331da177e4SLinus Torvalds	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1234aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1235ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1236295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
1237179efcb4SVegard Nossum	@echo  '  headers_check   - Sanity check on exported headers'
123874425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
123974425eeeSNicolas Palix	@$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
124074425eeeSNicolas Palix	@echo  ''
12411da177e4SLinus Torvalds	@echo  'Kernel packaging:'
12426c2133e1SSam Ravnborg	@$(MAKE) $(build)=$(package-dir) help
12431da177e4SLinus Torvalds	@echo  ''
12441da177e4SLinus Torvalds	@echo  'Documentation targets:'
12451da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
12461da177e4SLinus Torvalds	@echo  ''
124701dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
12481da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
124901dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
12501da177e4SLinus Torvalds	@echo  ''
12511da177e4SLinus Torvalds	@$(if $(boards), \
12521da177e4SLinus Torvalds		$(foreach b, $(boards), \
12531da177e4SLinus Torvalds		printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
12541da177e4SLinus Torvalds		echo '')
12555dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
12565dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
12575dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
12585dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
12595dffbe81SSegher Boessenkool		echo '')
12601da177e4SLinus Torvalds
12611da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
126245d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
12631da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1264701842e3SDustin Kirkland	@echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1265701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1266af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
126728bc20dcSSam Ravnborg	@echo  '  make W=n   [targets] Enable extra gcc checks, n=1,2,3 where'
126828bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
126928bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
127028bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1271a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
12721da177e4SLinus Torvalds	@echo  ''
12731da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
12741da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
12751da177e4SLinus Torvalds
12761da177e4SLinus Torvalds
12775dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
12785dffbe81SSegher Boessenkool
12795dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
12805dffbe81SSegher Boessenkool
12815dffbe81SSegher Boessenkoolboards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
12825dffbe81SSegher Boessenkool
12835dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
12845dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
12855dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
12865dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
12875dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
12885dffbe81SSegher Boessenkool		echo '')
12895dffbe81SSegher Boessenkool
12905dffbe81SSegher Boessenkool
12911da177e4SLinus Torvalds# Documentation targets
12921da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12931da177e4SLinus Torvalds%docs: scripts_basic FORCE
1294bffd2020SPeter Foley	$(Q)$(MAKE) $(build)=scripts build_docproc
12951da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=Documentation/DocBook $@
12961da177e4SLinus Torvalds
12971da177e4SLinus Torvaldselse # KBUILD_EXTMOD
12981da177e4SLinus Torvalds
12991da177e4SLinus Torvalds###
13001da177e4SLinus Torvalds# External module support.
13011da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
13021da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
13031da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
13041da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
13051da177e4SLinus Torvalds# be used.
13061da177e4SLinus Torvalds#
13071da177e4SLinus Torvalds# The following are the only valid targets when building external
13081da177e4SLinus Torvalds# modules.
13091da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
13101da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
13111da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
13121da177e4SLinus Torvalds# make M=dir modules_install
1313070b98bfSSam Ravnborg#                      Install the modules built in the module directory
13141da177e4SLinus Torvalds#                      Assumes install directory is already created
13151da177e4SLinus Torvalds
13161da177e4SLinus Torvalds# We are always building modules
13171da177e4SLinus TorvaldsKBUILD_MODULES := 1
13184f193362SPaul SmithPHONY += crmodverdir
13191da177e4SLinus Torvaldscrmodverdir:
13207bb9d092SSam Ravnborg	$(cmd_crmodverdir)
13211da177e4SLinus Torvalds
13224f193362SPaul SmithPHONY += $(objtree)/Module.symvers
13231da177e4SLinus Torvalds$(objtree)/Module.symvers:
13241da177e4SLinus Torvalds	@test -e $(objtree)/Module.symvers || ( \
13251da177e4SLinus Torvalds	echo; \
13261da177e4SLinus Torvalds	echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
13271da177e4SLinus Torvalds	echo "           is missing; modules will have no dependencies and modversions."; \
13281da177e4SLinus Torvalds	echo )
13291da177e4SLinus Torvalds
13301da177e4SLinus Torvaldsmodule-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
13314f193362SPaul SmithPHONY += $(module-dirs) modules
13321da177e4SLinus Torvalds$(module-dirs): crmodverdir $(objtree)/Module.symvers
13331da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
13341da177e4SLinus Torvalds
13351da177e4SLinus Torvaldsmodules: $(module-dirs)
1336fd54f502SMike Frysinger	@$(kecho) '  Building modules, stage 2.';
1337b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
13381da177e4SLinus Torvalds
13394f193362SPaul SmithPHONY += modules_install
1340a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post
1341a67dc21aSSam Ravnborg
1342a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
13434f193362SPaul SmithPHONY += _emodinst_
1344a67dc21aSSam Ravnborg_emodinst_:
1345a67dc21aSSam Ravnborg	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1346b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
13471da177e4SLinus Torvalds
13484f193362SPaul SmithPHONY += _emodinst_post
1349a67dc21aSSam Ravnborg_emodinst_post: _emodinst_
1350a67dc21aSSam Ravnborg	$(call cmd,depmod)
1351a67dc21aSSam Ravnborg
13521da177e4SLinus Torvaldsclean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
13531da177e4SLinus Torvalds
13544f193362SPaul SmithPHONY += $(clean-dirs) clean
13551da177e4SLinus Torvalds$(clean-dirs):
13561da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
13571da177e4SLinus Torvalds
13581da177e4SLinus Torvaldsclean:	rm-dirs := $(MODVERDIR)
135988d7be03SMichal Marekclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
13601da177e4SLinus Torvalds
13611da177e4SLinus Torvaldshelp:
13621da177e4SLinus Torvalds	@echo  '  Building external modules.'
13631da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
13641da177e4SLinus Torvalds	@echo  ''
13651da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
13661da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
13671da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
13681da177e4SLinus Torvalds	@echo  ''
136906300b21SSam Ravnborg
137006300b21SSam Ravnborg# Dummies...
13714f193362SPaul SmithPHONY += prepare scripts
137206300b21SSam Ravnborgprepare: ;
137306300b21SSam Ravnborgscripts: ;
13741da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
13751da177e4SLinus Torvalds
137688d7be03SMichal Marekclean: $(clean-dirs)
137788d7be03SMichal Marek	$(call cmd,rmdirs)
137888d7be03SMichal Marek	$(call cmd,rmfiles)
137943f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
138088d7be03SMichal Marek		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1381addbcdbbSDavid Howells		-o -name '*.ko.*' \
138288d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
138388d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
138488d7be03SMichal Marek		-o -name modules.builtin -o -name '.tmp_*.o.*' \
138588d7be03SMichal Marek		-o -name '*.gcno' \) -type f -print | xargs rm -f
138688d7be03SMichal Marek
13871da177e4SLinus Torvalds# Generate tags for editors
13881da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1389a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1390a680eedcSSam Ravnborg      cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
13911da177e4SLinus Torvalds
1392f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
13931da177e4SLinus Torvalds	$(call cmd,tags)
13941da177e4SLinus Torvalds
13951da177e4SLinus Torvalds# Scripts to check various things for consistency
13961da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13971da177e4SLinus Torvalds
1398279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report
1399279f3dd3SPeter Foley
14001da177e4SLinus Torvaldsincludecheck:
1401436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
14021da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
140380007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
14041da177e4SLinus Torvalds
14051da177e4SLinus Torvaldsversioncheck:
14062ee2d292SPeter Foley	find $(srctree)/* $(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
1422c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
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
1443c398ff00SMike Marciniszynimage_name:
1444c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1445c398ff00SMike Marciniszyn
1446ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake
1447ea01fa9fSBorislav Petkovtools/: FORCE
1448bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1449a50e4333SBorislav Petkov	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
1450ea01fa9fSBorislav Petkov
1451ea01fa9fSBorislav Petkovtools/%: FORCE
1452bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1453a50e4333SBorislav Petkov	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
1454ea01fa9fSBorislav Petkov
145506300b21SSam Ravnborg# Single targets
145606300b21SSam Ravnborg# ---------------------------------------------------------------------------
1457bc2546a6SSam Ravnborg# Single targets are compatible with:
1458e1b8513dSRobert P. J. Day# - build with mixed source and output
1459bc2546a6SSam Ravnborg# - build with separate output dir 'make O=...'
1460bc2546a6SSam Ravnborg# - external modules
1461bc2546a6SSam Ravnborg#
1462bc2546a6SSam Ravnborg#  target-dir => where to store outputfile
1463bc2546a6SSam Ravnborg#  build-dir  => directory in kernel source tree to use
146406300b21SSam Ravnborg
146506300b21SSam Ravnborgifeq ($(KBUILD_EXTMOD),)
1466aa360879SSam Ravnborg        build-dir  = $(patsubst %/,%,$(dir $@))
1467bc2546a6SSam Ravnborg        target-dir = $(dir $@)
146806300b21SSam Ravnborgelse
146906300b21SSam Ravnborg        zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1470bc2546a6SSam Ravnborg        build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1471bc2546a6SSam Ravnborg        target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
147206300b21SSam Ravnborgendif
147306300b21SSam Ravnborg
1474bc2546a6SSam Ravnborg%.s: %.c prepare scripts FORCE
1475bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1476bc2546a6SSam Ravnborg%.i: %.c prepare scripts FORCE
1477bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1478bc2546a6SSam Ravnborg%.o: %.c prepare scripts FORCE
1479bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1480bc2546a6SSam Ravnborg%.lst: %.c prepare scripts FORCE
1481bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1482bc2546a6SSam Ravnborg%.s: %.S prepare scripts FORCE
1483bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1484bc2546a6SSam Ravnborg%.o: %.S prepare scripts FORCE
1485bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
148615fde675SAndreas Gruenbacher%.symtypes: %.c prepare scripts FORCE
148715fde675SAndreas Gruenbacher	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1488bc2546a6SSam Ravnborg
1489bc2546a6SSam Ravnborg# Modules
149031110ebbSSam Ravnborg/: prepare scripts FORCE
149131110ebbSSam Ravnborg	$(cmd_crmodverdir)
149231110ebbSSam Ravnborg	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
149331110ebbSSam Ravnborg	$(build)=$(build-dir)
149431110ebbSSam Ravnborg%/: prepare scripts FORCE
14957bb9d092SSam Ravnborg	$(cmd_crmodverdir)
149606300b21SSam Ravnborg	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1497bc2546a6SSam Ravnborg	$(build)=$(build-dir)
1498bc2546a6SSam Ravnborg%.ko: prepare scripts FORCE
14997bb9d092SSam Ravnborg	$(cmd_crmodverdir)
150006300b21SSam Ravnborg	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1501bc2546a6SSam Ravnborg	$(build)=$(build-dir) $(@:.ko=.o)
1502b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
150306300b21SSam Ravnborg
15041da177e4SLinus Torvalds# FIXME Should go into a make.lib or something
15051da177e4SLinus Torvalds# ===========================================================================
15061da177e4SLinus Torvalds
15071da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
15081da177e4SLinus Torvalds      cmd_rmdirs = rm -rf $(rm-dirs)
15091da177e4SLinus Torvalds
15101da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
15111da177e4SLinus Torvalds      cmd_rmfiles = rm -f $(rm-files)
15121da177e4SLinus Torvalds
1513bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable
151450a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1515569658ddSMichal Marek      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1516b92021b0SRusty Russell                   $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
151750a8ec31SSam Ravnborg
15187bb9d092SSam Ravnborg# Create temporary dir for module support files
1519ab19f879SSam Ravnborg# clean it up only when building all modules
1520ab19f879SSam Ravnborgcmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1521ab19f879SSam Ravnborg                  $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
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