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