1c517d838SLinus TorvaldsVERSION = 4 21001354cSLinus TorvaldsPATCHLEVEL = 9 355922c9dSLinus TorvaldsSUBLEVEL = 0 4bc33b0caSLinus TorvaldsEXTRAVERSION = -rc4 51a695a90SLinus TorvaldsNAME = Psychotic Stoned Sheep 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 13a436bb7bSMasahiro Yamada# o Do not use make's built-in rules and variables 14d384e35aSLinus Nilsson# (this increases performance and avoids hard-to-debug behaviour); 15a436bb7bSMasahiro Yamada# o Look for make include files relative to root of kernel src 16a436bb7bSMasahiro YamadaMAKEFLAGS += -rR --include-dir=$(CURDIR) 171da177e4SLinus Torvalds 18c051346bSH. Peter Anvin# Avoid funny character set dependencies 1906b5dc64SH. Peter Anvinunexport LC_ALL 20c051346bSH. Peter AnvinLC_COLLATE=C 21c051346bSH. Peter AnvinLC_NUMERIC=C 2207105202SMichal Marekexport LC_COLLATE LC_NUMERIC 23c051346bSH. Peter Anvin 24ab7474eaSBorislav Petkov# Avoid interference with shell env settings 25ab7474eaSBorislav Petkovunexport GREP_OPTIONS 26ab7474eaSBorislav Petkov 271da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking 281da177e4SLinus Torvalds# to get the ordering right. 291da177e4SLinus Torvalds# 301da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in 311da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on 321da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often 331da177e4SLinus Torvalds# unavoidable when linking the built-in.o targets which finally 341da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and 351da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir 361da177e4SLinus Torvalds# is now up to date. 371da177e4SLinus Torvalds# 381da177e4SLinus Torvalds# The only cases where we need to modify files which have global 391da177e4SLinus Torvalds# effects are thus separated out and done before the recursive 401da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the 411da177e4SLinus Torvalds# prepare rule. 421da177e4SLinus Torvalds 43066b7ed9SMichal Marek# Beautify output 44066b7ed9SMichal Marek# --------------------------------------------------------------------------- 45066b7ed9SMichal Marek# 46066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making 47066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set 48066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g. 49066b7ed9SMichal Marek# 50066b7ed9SMichal Marek# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 51066b7ed9SMichal Marek# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 52066b7ed9SMichal Marek# 53066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed. 54066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed. 55066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since 56066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist. 57066b7ed9SMichal Marek# 58066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful 59066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode. 60066b7ed9SMichal Marek# 61066b7ed9SMichal Marek# $(Q)ln $@ :< 62066b7ed9SMichal Marek# 63066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 64066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed. 65066b7ed9SMichal Marek# 661da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default 671da177e4SLinus Torvalds# Use 'make V=1' to see the full commands 681da177e4SLinus Torvalds 691da177e4SLinus Torvaldsifeq ("$(origin V)", "command line") 701da177e4SLinus Torvalds KBUILD_VERBOSE = $(V) 711da177e4SLinus Torvaldsendif 721da177e4SLinus Torvaldsifndef KBUILD_VERBOSE 731da177e4SLinus Torvalds KBUILD_VERBOSE = 0 741da177e4SLinus Torvaldsendif 751da177e4SLinus Torvalds 76066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1) 77066b7ed9SMichal Marek quiet = 78066b7ed9SMichal Marek Q = 79066b7ed9SMichal Marekelse 80066b7ed9SMichal Marek quiet=quiet_ 81066b7ed9SMichal Marek Q = @ 82066b7ed9SMichal Marekendif 83066b7ed9SMichal Marek 84066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of 85066b7ed9SMichal Marek# commands 86066b7ed9SMichal Marek 87066b7ed9SMichal Marekifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4 88066b7ed9SMichal Marekifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),) 89066b7ed9SMichal Marek quiet=silent_ 90066b7ed9SMichal Marekendif 91066b7ed9SMichal Marekelse # make-3.8x 92066b7ed9SMichal Marekifneq ($(filter s% -s%,$(MAKEFLAGS)),) 93066b7ed9SMichal Marek quiet=silent_ 94066b7ed9SMichal Marekendif 95066b7ed9SMichal Marekendif 96066b7ed9SMichal Marek 97066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE 98066b7ed9SMichal Marek 991da177e4SLinus Torvalds# kbuild supports saving output files in a separate directory. 1001da177e4SLinus Torvalds# To locate output files in a separate directory two syntaxes are supported. 1011da177e4SLinus Torvalds# In both cases the working directory must be the root of the kernel src. 1021da177e4SLinus Torvalds# 1) O= 1031da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/" 1041da177e4SLinus Torvalds# 1051da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT 1061da177e4SLinus Torvalds# Set the environment variable KBUILD_OUTPUT to point to the directory 1071da177e4SLinus Torvalds# where the output files shall be placed. 1081da177e4SLinus Torvalds# export KBUILD_OUTPUT=dir/to/store/output/files/ 1091da177e4SLinus Torvalds# make 1101da177e4SLinus Torvalds# 1111da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment 1121da177e4SLinus Torvalds# variable. 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds# KBUILD_SRC is set on invocation of make in OBJ directory 1151da177e4SLinus Torvalds# KBUILD_SRC is not intended to be used by the regular user (for now) 1161da177e4SLinus Torvaldsifeq ($(KBUILD_SRC),) 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds# OK, Make called in directory where kernel src resides 1191da177e4SLinus Torvalds# Do we want to locate output files in a separate directory? 1201da177e4SLinus Torvaldsifeq ("$(origin O)", "command line") 1211da177e4SLinus Torvalds KBUILD_OUTPUT := $(O) 1221da177e4SLinus Torvaldsendif 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds# That's our default target when none is given on the command line 1254f193362SPaul SmithPHONY := _all 1261da177e4SLinus Torvalds_all: 1271da177e4SLinus Torvalds 1281cacc9abSSam Ravnborg# Cancel implicit rules on top Makefile 1291cacc9abSSam Ravnborg$(CURDIR)/Makefile Makefile: ; 1301cacc9abSSam Ravnborg 13151193b76SRobert Jarzmikifneq ($(words $(subst :, ,$(CURDIR))), 1) 13251193b76SRobert Jarzmik $(error main directory cannot contain spaces nor colons) 13351193b76SRobert Jarzmikendif 13451193b76SRobert Jarzmik 1351da177e4SLinus Torvaldsifneq ($(KBUILD_OUTPUT),) 1361da177e4SLinus Torvalds# Invoke a second make in the output directory, passing relevant variables 1371da177e4SLinus Torvalds# check that the output directory actually exists 1381da177e4SLinus Torvaldssaved-output := $(KBUILD_OUTPUT) 1391c9e70a5SMasahiro YamadaKBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ 1401c9e70a5SMasahiro Yamada && /bin/pwd) 1411da177e4SLinus Torvalds$(if $(KBUILD_OUTPUT),, \ 1421c9e70a5SMasahiro Yamada $(error failed to create output directory "$(saved-output)")) 1431da177e4SLinus Torvalds 1440b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make 1450b35786dSMilton Miller 1461cacc9abSSam Ravnborg$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 14716f89098SCharles Keepax @: 1480b35786dSMilton Miller 1492e8d696bSMasahiro Yamadasub-make: 150745a2543SMasahiro Yamada $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ 151aa55c8e2SMasahiro Yamada -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds# Leave processing to above invocation of make 1541da177e4SLinus Torvaldsskip-makefile := 1 1551da177e4SLinus Torvaldsendif # ifneq ($(KBUILD_OUTPUT),) 1561da177e4SLinus Torvaldsendif # ifeq ($(KBUILD_SRC),) 1571da177e4SLinus Torvalds 1581da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 1591da177e4SLinus Torvaldsifeq ($(skip-makefile),) 1601da177e4SLinus Torvalds 1617ff52571SMasahiro Yamada# Do not print "Entering directory ...", 1627ff52571SMasahiro Yamada# but we want to display it when entering to the output directory 1637ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames. 1647ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory 1657ff52571SMasahiro Yamada 166aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the 167aa55c8e2SMasahiro Yamada# C compilation. 168aa55c8e2SMasahiro Yamada# 169aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files. 170aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless 171aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not. 172aa55c8e2SMasahiro Yamada# 173aa55c8e2SMasahiro Yamada# See the file "Documentation/sparse.txt" for more details, including 174aa55c8e2SMasahiro Yamada# where to get the "sparse" utility. 175aa55c8e2SMasahiro Yamada 176aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line") 177aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = $(C) 178aa55c8e2SMasahiro Yamadaendif 179aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC 180aa55c8e2SMasahiro Yamada KBUILD_CHECKSRC = 0 181aa55c8e2SMasahiro Yamadaendif 182aa55c8e2SMasahiro Yamada 183aa55c8e2SMasahiro Yamada# Use make M=dir to specify directory of external module to build 184aa55c8e2SMasahiro Yamada# Old syntax make ... SUBDIRS=$PWD is still supported 185aa55c8e2SMasahiro Yamada# Setting the environment variable KBUILD_EXTMOD take precedence 186aa55c8e2SMasahiro Yamadaifdef SUBDIRS 187aa55c8e2SMasahiro Yamada KBUILD_EXTMOD ?= $(SUBDIRS) 188aa55c8e2SMasahiro Yamadaendif 189aa55c8e2SMasahiro Yamada 190aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line") 191aa55c8e2SMasahiro Yamada KBUILD_EXTMOD := $(M) 192aa55c8e2SMasahiro Yamadaendif 193aa55c8e2SMasahiro Yamada 1941da177e4SLinus Torvalds# If building an external module we do not care about the all: rule 1951da177e4SLinus Torvalds# but instead _all depend on modules 1964f193362SPaul SmithPHONY += all 1971da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 1981da177e4SLinus Torvalds_all: all 1991da177e4SLinus Torvaldselse 2001da177e4SLinus Torvalds_all: modules 2011da177e4SLinus Torvaldsendif 2021da177e4SLinus Torvalds 2039da0763bSMichal Marekifeq ($(KBUILD_SRC),) 2049da0763bSMichal Marek # building in the source tree 2059da0763bSMichal Marek srctree := . 2069da0763bSMichal Marekelse 2079da0763bSMichal Marek ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) 2089da0763bSMichal Marek # building in a subdirectory of the source tree 2099da0763bSMichal Marek srctree := .. 2109da0763bSMichal Marek else 2119da0763bSMichal Marek srctree := $(KBUILD_SRC) 2129da0763bSMichal Marek endif 2139da0763bSMichal Marekendif 2147e1c0477SMichal Marekobjtree := . 2151da177e4SLinus Torvaldssrc := $(srctree) 2161da177e4SLinus Torvaldsobj := $(objtree) 2171da177e4SLinus Torvalds 2180f558c33SMattia DongiliVPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 2191da177e4SLinus Torvalds 22011294235SAmerigo Wangexport srctree objtree VPATH 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds# SUBARCH tells the usermode build what the underlying arch is. That is set 2231da177e4SLinus Torvalds# first, and if a usermode build is happening, the "ARCH=um" on the command 2241da177e4SLinus Torvalds# line overrides the setting of ARCH below. If a native build is happening, 2251da177e4SLinus Torvalds# then ARCH is assigned, getting whatever value it gets normally, and 2261da177e4SLinus Torvalds# SUBARCH is subsequently ignored. 2271da177e4SLinus Torvalds 228ffee0de4SDavid WoodhouseSUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ 229ffee0de4SDavid Woodhouse -e s/sun4u/sparc64/ \ 2301da177e4SLinus Torvalds -e s/arm.*/arm/ -e s/sa110/arm/ \ 23139990b5eSLinus Torvalds -e s/s390x/s390/ -e s/parisc64/parisc/ \ 232236b1957SPaul Mundt -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 233f1b99392SWill Deacon -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ ) 2341da177e4SLinus Torvalds 2351da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 2361da177e4SLinus Torvalds# --------------------------------------------------------------------------- 2371da177e4SLinus Torvalds# 2381da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 2391da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 2401da177e4SLinus Torvalds# ARCH can be set during invocation of make: 2411da177e4SLinus Torvalds# make ARCH=ia64 2421da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 2431da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 2461da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 2471da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 2481da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 2491da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 2501da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 25184336466SRoland McGrath# A third alternative is to store a setting in .config so that plain 25284336466SRoland McGrath# "make" in the configured kernel build directory always uses that. 2531da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 2541da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 2552331d1a6SSam RavnborgARCH ?= $(SUBARCH) 25684336466SRoland McGrathCROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) 2571da177e4SLinus Torvalds 2581da177e4SLinus Torvalds# Architecture as present in compile.h 2591da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 2606752ed90SThomas GleixnerSRCARCH := $(ARCH) 2611da177e4SLinus Torvalds 262d746d647SSam Ravnborg# Additional ARCH settings for x86 263d746d647SSam Ravnborgifeq ($(ARCH),i386) 264d746d647SSam Ravnborg SRCARCH := x86 265d746d647SSam Ravnborgendif 266d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 267d746d647SSam Ravnborg SRCARCH := x86 268d746d647SSam Ravnborgendif 26974b469f2SSam Ravnborg 2705e538790SSam Ravnborg# Additional ARCH settings for sparc 271e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 272e69f58c0SNamhyung Kim SRCARCH := sparc 273e69f58c0SNamhyung Kimendif 274a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 2755e538790SSam Ravnborg SRCARCH := sparc 276a439fe51SSam Ravnborgendif 2772fb9b1bdSSam Ravnborg 2783cc000b5SPaul Mundt# Additional ARCH settings for sh 2793cc000b5SPaul Mundtifeq ($(ARCH),sh64) 2803cc000b5SPaul Mundt SRCARCH := sh 2813cc000b5SPaul Mundtendif 2823cc000b5SPaul Mundt 28318aecc2bSChris Metcalf# Additional ARCH settings for tile 2846738d321SChris Metcalfifeq ($(ARCH),tilepro) 2856738d321SChris Metcalf SRCARCH := tile 2866738d321SChris Metcalfendif 28718aecc2bSChris Metcalfifeq ($(ARCH),tilegx) 28818aecc2bSChris Metcalf SRCARCH := tile 28918aecc2bSChris Metcalfendif 29018aecc2bSChris Metcalf 2915e538790SSam Ravnborg# Where to locate arch specific headers 2925e538790SSam Ravnborghdr-arch := $(SRCARCH) 2935e538790SSam Ravnborg 29414cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 29541263fc6SBen Gardinerexport KCONFIG_CONFIG 29614cdd3c4SRoman Zippel 2971da177e4SLinus Torvalds# SHELL used by kbuild 2981da177e4SLinus TorvaldsCONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 2991da177e4SLinus Torvalds else if [ -x /bin/bash ]; then echo /bin/bash; \ 3001da177e4SLinus Torvalds else echo sh; fi ; fi) 3011da177e4SLinus Torvalds 3021da177e4SLinus TorvaldsHOSTCC = gcc 3031da177e4SLinus TorvaldsHOSTCXX = g++ 30451b97e35SKirill A. ShutemovHOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89 3051da177e4SLinus TorvaldsHOSTCXXFLAGS = -O2 3061da177e4SLinus Torvalds 30761163efaSBehan Websterifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1) 30861163efaSBehan WebsterHOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \ 30961163efaSBehan Webster -Wno-missing-field-initializers -fno-delete-null-pointer-checks 31061163efaSBehan Websterendif 31161163efaSBehan Webster 3121da177e4SLinus Torvalds# Decide whether to build built-in, modular, or both. 3131da177e4SLinus Torvalds# Normally, just do built-in. 3141da177e4SLinus Torvalds 3151da177e4SLinus TorvaldsKBUILD_MODULES := 3161da177e4SLinus TorvaldsKBUILD_BUILTIN := 1 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds# If we have only "make modules", don't compile built-in objects. 3191da177e4SLinus Torvalds# When we're building modules with modversions, we need to consider 3201da177e4SLinus Torvalds# the built-in objects during the descend as well, in order to 3211da177e4SLinus Torvalds# make sure the checksums are up to date before we record them. 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvaldsifeq ($(MAKECMDGOALS),modules) 3241da177e4SLinus Torvalds KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 3251da177e4SLinus Torvaldsendif 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds# If we have "make <whatever> modules", compile modules 3281da177e4SLinus Torvalds# in addition to whatever we do anyway. 3291da177e4SLinus Torvalds# Just "make" or "make all" shall build modules as well 3301da177e4SLinus Torvalds 3311da177e4SLinus Torvaldsifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 3321da177e4SLinus Torvalds KBUILD_MODULES := 1 3331da177e4SLinus Torvaldsendif 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvaldsifeq ($(MAKECMDGOALS),) 3361da177e4SLinus Torvalds KBUILD_MODULES := 1 3371da177e4SLinus Torvaldsendif 3381da177e4SLinus Torvalds 339e579d351SSam Ravnborgexport KBUILD_MODULES KBUILD_BUILTIN 3401da177e4SLinus Torvaldsexport KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 3411da177e4SLinus Torvalds 3421cacc9abSSam Ravnborg# We need some generic definitions (do not try to remake the file). 343a436bb7bSMasahiro Yamadascripts/Kbuild.include: ; 344a436bb7bSMasahiro Yamadainclude scripts/Kbuild.include 3458ec4b4ffSSam Ravnborg 3461da177e4SLinus Torvalds# Make variables (CC, etc...) 3471da177e4SLinus TorvaldsAS = $(CROSS_COMPILE)as 3481da177e4SLinus TorvaldsLD = $(CROSS_COMPILE)ld 3491da177e4SLinus TorvaldsCC = $(CROSS_COMPILE)gcc 3501da177e4SLinus TorvaldsCPP = $(CC) -E 3511da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 3521da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 3531da177e4SLinus TorvaldsSTRIP = $(CROSS_COMPILE)strip 3541da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 3551da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 3561da177e4SLinus TorvaldsAWK = awk 3571da177e4SLinus TorvaldsGENKSYMS = scripts/genksyms/genksyms 358caa27b66SSam RavnborgINSTALLKERNEL := installkernel 3591da177e4SLinus TorvaldsDEPMOD = /sbin/depmod 3601da177e4SLinus TorvaldsPERL = perl 361011bf125SMasahiro YamadaPYTHON = python 3621da177e4SLinus TorvaldsCHECK = sparse 3631da177e4SLinus Torvalds 36480a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 36580a7d1d9SHannes Eder -Wbitwise -Wno-return-void $(CF) 366b36fad65SMichal MarekNOSTDINC_FLAGS = 3676588169dSSam RavnborgCFLAGS_MODULE = 3686588169dSSam RavnborgAFLAGS_MODULE = 3696588169dSSam RavnborgLDFLAGS_MODULE = 3701da177e4SLinus TorvaldsCFLAGS_KERNEL = 3711da177e4SLinus TorvaldsAFLAGS_KERNEL = 372b36fad65SMichal MarekLDFLAGS_vmlinux = 373*a76bcf55SArnd BergmannCFLAGS_GCOV = -fprofile-arcs -ftest-coverage -fno-tree-loop-im -Wno-maybe-uninitialized 374543c37cbSEmese RevfyCFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,) 3751da177e4SLinus Torvalds 3761da177e4SLinus Torvalds 377abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 378abbf1590SDavid HowellsUSERINCLUDE := \ 379abbf1590SDavid Howells -I$(srctree)/arch/$(hdr-arch)/include/uapi \ 3803308b285SArnd Bergmann -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \ 381abbf1590SDavid Howells -I$(srctree)/include/uapi \ 3823308b285SArnd Bergmann -I$(objtree)/include/generated/uapi \ 383abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 384abbf1590SDavid Howells 3851da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 3861da177e4SLinus Torvalds# Needed to be compatible with the O= option 387abbf1590SDavid HowellsLINUXINCLUDE := \ 388abbf1590SDavid Howells -I$(srctree)/arch/$(hdr-arch)/include \ 3893308b285SArnd Bergmann -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \ 3903308b285SArnd Bergmann -I$(objtree)/arch/$(hdr-arch)/include/generated \ 39196f13045SSam Ravnborg $(if $(KBUILD_SRC), -I$(srctree)/include) \ 3923308b285SArnd Bergmann -I$(objtree)/include 393dc33db7cSArnd Bergmann 394dc33db7cSArnd BergmannLINUXINCLUDE += $(filter-out $(LINUXINCLUDE),$(USERINCLUDE)) 3951da177e4SLinus Torvalds 396d8672b40SSam RavnborgKBUILD_CPPFLAGS := -D__KERNEL__ 3971da177e4SLinus Torvalds 398a0f97e06SSam RavnborgKBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 39994bed2a9SDave Jones -fno-strict-aliasing -fno-common \ 400a8735821SFloris Kraak -Werror-implicit-function-declaration \ 40151b97e35SKirill A. Shutemov -Wno-format-security \ 40251b97e35SKirill A. Shutemov -std=gnu89 403a1c48bb1SGeert Uytterhoeven 40480c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 40580c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 406222d394dSSam RavnborgKBUILD_AFLAGS := -D__ASSEMBLY__ 4076588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 4086588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 4096588169dSSam RavnborgKBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 4101da177e4SLinus Torvalds 411f1d28fb0SRoman Zippel# Read KERNELRELEASE from include/config/kernel.release (if it exists) 412f1d28fb0SRoman ZippelKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 413cacd54efSMichal MarekKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 414cb58455cSSam Ravnborg 415070b98bfSSam Ravnborgexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 41680ef88d6SSam Ravnborgexport ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 417caa27b66SSam Ravnborgexport CPP AR NM STRIP OBJCOPY OBJDUMP 418011bf125SMasahiro Yamadaexport MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE 419070b98bfSSam Ravnborgexport HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 4201da177e4SLinus Torvalds 42106c5040cSSam Ravnborgexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 4225c9a8750SDmitry Vyukovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN 423222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 4246588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 42580c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 42640df759eSMichal Marekexport KBUILD_ARFLAGS 4271da177e4SLinus Torvalds 4281da177e4SLinus Torvalds# When compiling out-of-tree modules, put MODVERDIR in the module 4291da177e4SLinus Torvalds# tree rather than in the kernel tree. The kernel tree might 4301da177e4SLinus Torvalds# even be read-only. 4311da177e4SLinus Torvaldsexport MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 4321da177e4SLinus Torvalds 4331da177e4SLinus Torvalds# Files to ignore in find ... statements 4341da177e4SLinus Torvalds 435ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 436ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 437ae63b2d7SPrarit Bhargava -prune -o 438450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 439450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds# =========================================================================== 4421da177e4SLinus Torvalds# Rules shared between *config targets and build targets 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds# Basic helpers built in scripts/ 4454f193362SPaul SmithPHONY += scripts_basic 4461da177e4SLinus Torvaldsscripts_basic: 4471da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 448638adb05SSteven Rostedt $(Q)rm -f .tmp_quiet_recordmcount 4491da177e4SLinus Torvalds 450cd05e6bdSJan Beulich# To avoid any implicit rule to kick in, define an empty command. 451cd05e6bdSJan Beulichscripts/basic/%: scripts_basic ; 452cd05e6bdSJan Beulich 4534f193362SPaul SmithPHONY += outputmakefile 454fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 455fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 456fd5f0cd6SJan Beulich# output directory. 4571da177e4SLinus Torvaldsoutputmakefile: 458fd5f0cd6SJan Beulichifneq ($(KBUILD_SRC),) 45992979997SAndi Kleen $(Q)ln -fsn $(srctree) source 460fd5f0cd6SJan Beulich $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 461fd5f0cd6SJan Beulich $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 462fd5f0cd6SJan Beulichendif 4631da177e4SLinus Torvalds 464d8ecc5cdSSam Ravnborg# Support for using generic headers in asm-generic 465d8ecc5cdSSam RavnborgPHONY += asm-generic 466d8ecc5cdSSam Ravnborgasm-generic: 467d8ecc5cdSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 4683c5994c8SCatalin Marinas src=asm obj=arch/$(SRCARCH)/include/generated/asm 4693c5994c8SCatalin Marinas $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 4703c5994c8SCatalin Marinas src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm 471d8ecc5cdSSam Ravnborg 4721da177e4SLinus Torvalds# To make sure we do not include .config for any of the *config targets 4731da177e4SLinus Torvalds# catch them early, and hand them over to scripts/kconfig/Makefile 4741da177e4SLinus Torvalds# It is allowed to specify more targets when calling make, including 4751da177e4SLinus Torvalds# mixing *config targets and build targets. 4761da177e4SLinus Torvalds# For example 'make oldconfig all'. 4771da177e4SLinus Torvalds# Detect when mixed targets is specified, and make a second invocation 4781da177e4SLinus Torvalds# of make so .config is not included in this case either (for *config). 4791da177e4SLinus Torvalds 48010b63956SDavid Howellsversion_h := include/generated/uapi/linux/version.h 481223c24a7SMichal Marekold_version_h := include/linux/version.h 482d183e6f5SDavid Howells 4833eb3c740SRoman Zippelno-dot-config-targets := clean mrproper distclean \ 484fbae4d58SMichal Marek cscope gtags TAGS tags help% %docs check% coccicheck \ 485d183e6f5SDavid Howells $(version_h) headers_% archheaders archscripts \ 4864aed2fd8SLinus Torvalds kernelversion %src-pkg 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvaldsconfig-targets := 0 4891da177e4SLinus Torvaldsmixed-targets := 0 4901da177e4SLinus Torvaldsdot-config := 1 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvaldsifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 4931da177e4SLinus Torvalds ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 4941da177e4SLinus Torvalds dot-config := 0 4951da177e4SLinus Torvalds endif 4961da177e4SLinus Torvaldsendif 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 4991da177e4SLinus Torvalds ifneq ($(filter config %config,$(MAKECMDGOALS)),) 5001da177e4SLinus Torvalds config-targets := 1 501d0d38cd9SMasahiro Yamada ifneq ($(words $(MAKECMDGOALS)),1) 5021da177e4SLinus Torvalds mixed-targets := 1 5031da177e4SLinus Torvalds endif 5041da177e4SLinus Torvalds endif 5051da177e4SLinus Torvaldsendif 506a85a41edSMichal Marek# install and module_install need also be processed one by one 507a85a41edSMichal Marekifneq ($(filter install,$(MAKECMDGOALS)),) 508a85a41edSMichal Marek ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 509a85a41edSMichal Marek mixed-targets := 1 510a85a41edSMichal Marek endif 511a85a41edSMichal Marekendif 5121da177e4SLinus Torvalds 5131da177e4SLinus Torvaldsifeq ($(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' 538a436bb7bSMasahiro Yamadainclude 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 \ 5586b90bd4bSEmese Revfy asm-generic gcc-plugins 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/ 56737d9fe47SFeng Wuvirt-y := virt/ 5681da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 5691da177e4SLinus Torvalds 5701da177e4SLinus Torvaldsifeq ($(dot-config),1) 5719ee4e336SSam Ravnborg# Read in config 5729ee4e336SSam Ravnborg-include include/config/auto.conf 5731da177e4SLinus Torvalds 5749ee4e336SSam Ravnborgifeq ($(KBUILD_EXTMOD),) 5751da177e4SLinus Torvalds# Read in dependencies to all Kconfig* files, make sure to run 5761da177e4SLinus Torvalds# oldconfig if changes are detected. 577c955ccafSRoman Zippel-include include/config/auto.conf.cmd 5781da177e4SLinus Torvalds 5791da177e4SLinus Torvalds# To avoid any implicit rule to kick in, define an empty command 58014cdd3c4SRoman Zippel$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 5811da177e4SLinus Torvalds 582c955ccafSRoman Zippel# If .config is newer than include/config/auto.conf, someone tinkered 583752625cfSSam Ravnborg# with it and forgot to run make oldconfig. 584070b98bfSSam Ravnborg# if auto.conf.cmd is missing then we are probably in a cleaned tree so 585752625cfSSam Ravnborg# we execute the config step to be sure to catch updated Kconfig files 586bc081dd6SMichal Marekinclude/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 5871da177e4SLinus Torvalds $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 5881da177e4SLinus Torvaldselse 589264a2683SSam Ravnborg# external modules needs include/generated/autoconf.h and include/config/auto.conf 5909ee4e336SSam Ravnborg# but do not care if they are up-to-date. Use auto.conf to trigger the test 5919ee4e336SSam RavnborgPHONY += include/config/auto.conf 5929ee4e336SSam Ravnborg 5939ee4e336SSam Ravnborginclude/config/auto.conf: 594264a2683SSam Ravnborg $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 5955369f550SMichal Marek echo >&2; \ 5965369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 5975369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 5985369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 5995369f550SMichal Marek echo >&2 ; \ 6009ee4e336SSam Ravnborg /bin/false) 6019ee4e336SSam Ravnborg 6029ee4e336SSam Ravnborgendif # KBUILD_EXTMOD 603c955ccafSRoman Zippel 6041da177e4SLinus Torvaldselse 6051da177e4SLinus Torvalds# Dummy target needed, because used as prerequisite 606c955ccafSRoman Zippelinclude/config/auto.conf: ; 6079ee4e336SSam Ravnborgendif # $(dot-config) 6081da177e4SLinus Torvalds 6091da177e4SLinus Torvalds# The all: target is the default when no target is given on the 6101da177e4SLinus Torvalds# command line. 6111da177e4SLinus Torvalds# This allow a user to issue only 'make' to build a kernel including modules 612c8447161SMichal Marek# Defaults to vmlinux, but the arch makefile usually adds further targets 6131da177e4SLinus Torvaldsall: vmlinux 6141da177e4SLinus Torvalds 6156dd3f13eSMichal Marek# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default 6166dd3f13eSMichal Marek# values of the respective KBUILD_* variables 6176dd3f13eSMichal MarekARCH_CPPFLAGS := 6186dd3f13eSMichal MarekARCH_AFLAGS := 6196dd3f13eSMichal MarekARCH_CFLAGS := 620a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile 621a1c48bb1SGeert Uytterhoeven 622a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 623ef6000b4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 624a1c48bb1SGeert Uytterhoeven 625b67067f1SNicholas Pigginifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 626b67067f1SNicholas PigginKBUILD_CFLAGS += $(call cc-option,-ffunction-sections,) 627b67067f1SNicholas PigginKBUILD_CFLAGS += $(call cc-option,-fdata-sections,) 628b67067f1SNicholas Pigginendif 629b67067f1SNicholas Piggin 6301da177e4SLinus Torvaldsifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 631*a76bcf55SArnd BergmannKBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,) 6321da177e4SLinus Torvaldselse 633815eb71eSArnd Bergmannifdef CONFIG_PROFILE_ALL_BRANCHES 634*a76bcf55SArnd BergmannKBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) 635815eb71eSArnd Bergmannelse 636a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 6371da177e4SLinus Torvaldsendif 638815eb71eSArnd Bergmannendif 6391da177e4SLinus Torvalds 640*a76bcf55SArnd BergmannKBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \ 641*a76bcf55SArnd Bergmann $(call cc-disable-warning,maybe-uninitialized,)) 642*a76bcf55SArnd Bergmann 64369102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 64469102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 64569102311SJiri Kosina 6466b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins 6476b90bd4bSEmese Revfy 6481873e870SAndi Kleenifdef CONFIG_READABLE_ASM 6491873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 6501873e870SAndi Kleen# reorder blocks reorders the control in the function 6511873e870SAndi Kleen# ipa clone creates specialized cloned functions 6521873e870SAndi Kleen# partial inlining inlines only parts of functions 6531873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 6541873e870SAndi Kleen $(call cc-option,-fno-ipa-cp-clone,) \ 6551873e870SAndi Kleen $(call cc-option,-fno-partial-inlining) 6561873e870SAndi Kleenendif 6571873e870SAndi Kleen 65808f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 65935bb5b1eSAndi KleenKBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 66035bb5b1eSAndi Kleenendif 66135bb5b1eSAndi Kleen 662c965b105SKees Cook# This selects the stack protector compiler flag. Testing it is delayed 663c965b105SKees Cook# until after .config has been reprocessed, in the prepare-compiler-check 664c965b105SKees Cook# target. 6658779657dSKees Cookifdef CONFIG_CC_STACKPROTECTOR_REGULAR 66619952a92SKees Cook stackp-flag := -fstack-protector 667c965b105SKees Cook stackp-name := REGULAR 6686c15b327SJan Beulichelse 6696c15b327SJan Beulichifdef CONFIG_CC_STACKPROTECTOR_STRONG 6708779657dSKees Cook stackp-flag := -fstack-protector-strong 671c965b105SKees Cook stackp-name := STRONG 67219952a92SKees Cookelse 67319952a92SKees Cook # Force off for distro compilers that enable stack protector by default. 67419952a92SKees Cook stackp-flag := $(call cc-option, -fno-stack-protector) 67519952a92SKees Cookendif 6766c15b327SJan Beulichendif 677c965b105SKees Cook# Find arch-specific stack protector compiler sanity-checking script. 678c965b105SKees Cookifdef CONFIG_CC_STACKPROTECTOR 679228d96c6SKees Cook stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh 680228d96c6SKees Cook stackp-check := $(wildcard $(stackp-path)) 681c965b105SKees Cookendif 68219952a92SKees CookKBUILD_CFLAGS += $(stackp-flag) 683e06b8b98SSam Ravnborg 6845631d9c4SMichal Marekifeq ($(cc-name),clang) 68561163efaSBehan WebsterKBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) 68661163efaSBehan WebsterKBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,) 68761163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, unused-variable) 68861163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) 68961163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, gnu) 69061163efaSBehan Webster# Quiet clang warning: comparison of unsigned expression < 0 is always false 69161163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) 69261163efaSBehan Webster# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 69361163efaSBehan Webster# source of a reference will be _MergedGlobals and not on of the whitelisted names. 69461163efaSBehan Webster# See modpost pattern 2 69561163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) 69626ea6bb1SBehan WebsterKBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) 69761163efaSBehan Websterelse 69861163efaSBehan Webster 699c9c6837dSArnd Bergmann# These warnings generated too much noise in a regular build. 700c9c6837dSArnd Bergmann# Use make W=1 to enable them (see scripts/Makefile.build) 7018417da6fSMichal MarekKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 702c9c6837dSArnd BergmannKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 70361163efaSBehan Websterendif 704af0e5d56SDave Jones 7051da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 706a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 7071da177e4SLinus Torvaldselse 7087e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 7097e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 7107e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 7117e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 7127e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 7137e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 714a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 7151da177e4SLinus Torvaldsendif 7167e9501fdSRabin Vincentendif 7171da177e4SLinus Torvalds 7182062afb4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) 7192062afb4SLinus Torvalds 7201da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO 721866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT 722866ced95SAndi KleenKBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) 723866ced95SAndi Kleenelse 724a0f97e06SSam RavnborgKBUILD_CFLAGS += -g 725866ced95SAndi Kleenendif 7262288328cSBehan WebsterKBUILD_AFLAGS += -Wa,-gdwarf-2 7271da177e4SLinus Torvaldsendif 728bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4 729bfaf2dd3SAndi KleenKBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) 730bfaf2dd3SAndi Kleenendif 7311da177e4SLinus Torvalds 732d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED 733e82c4bb8SAndi KleenKBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 734e82c4bb8SAndi Kleen $(call cc-option,-fno-var-tracking) 735d6f4ceb7SAndi Kleenendif 736d6f4ceb7SAndi Kleen 737606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 738c0a80c0cSHeiko Carstensifndef CC_FLAGS_FTRACE 739c0a80c0cSHeiko CarstensCC_FLAGS_FTRACE := -pg 740c0a80c0cSHeiko Carstensendif 741c0a80c0cSHeiko Carstensexport CC_FLAGS_FTRACE 742a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY 743a2546faeSSteven RostedtCC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) 744a2546faeSSteven Rostedtendif 745c0a80c0cSHeiko CarstensKBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY) 746a2546faeSSteven RostedtKBUILD_AFLAGS += $(CC_USING_FENTRY) 74772441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE 748cf4db259SSteven Rostedt ifdef CONFIG_HAVE_C_RECORDMCOUNT 74972441cb1SSteven Rostedt BUILD_C_RECORDMCOUNT := y 75072441cb1SSteven Rostedt export BUILD_C_RECORDMCOUNT 75172441cb1SSteven Rostedt endif 75272441cb1SSteven Rostedtendif 75316444a8aSArnaldo Carvalho de Meloendif 75416444a8aSArnaldo Carvalho de Melo 75591341d4bSSam Ravnborg# We trigger additional mismatches with less inlining 75691341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH 75791341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 75891341d4bSSam Ravnborgendif 75991341d4bSSam Ravnborg 760e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 761e8f5bdb0SRik van RielNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 762e8e69931SSam RavnborgCHECKFLAGS += $(NOSTDINC_FLAGS) 763e8e69931SSam Ravnborg 7641da177e4SLinus Torvalds# warn about C99 declaration after statement 765a0f97e06SSam RavnborgKBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 7661da177e4SLinus Torvalds 767070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 7688417da6fSMichal MarekKBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) 7691da177e4SLinus Torvalds 770fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 771a137802eSLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 772d0115552SLinus Torvalds 7738f7f5c9fSAndi Kleen# conserve stack if available 7748f7f5c9fSAndi KleenKBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 7758f7f5c9fSAndi Kleen 77680970472SSergei Trofimovich# disallow errors like 'EXPORT_GPL(foo);' with missing header 77780970472SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) 77880970472SSergei Trofimovich 77980970472SSergei Trofimovich# require functions to have arguments in prototypes, not empty 'int foo()' 78080970472SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) 78180970472SSergei Trofimovich 782fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 783fe7c36c7SJosh TriplettKBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 784fe7c36c7SJosh Triplett 785ea8daa7bSDaniel Wagner# enforce correct pointer usage 786ea8daa7bSDaniel WagnerKBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 787ea8daa7bSDaniel Wagner 78840df759eSMichal Marek# use the deterministic mode of AR if available 78940df759eSMichal MarekKBUILD_ARFLAGS := $(call ar-option,D) 79040df759eSMichal Marek 791bf5438fcSJason Baron# check for 'asm goto' 792bf5438fcSJason Baronifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) 793bf5438fcSJason Baron KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO 794c0ccf6f9SAnton Blanchard KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO 795bf5438fcSJason Baronendif 796bf5438fcSJason Baron 797a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan 798a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn 799c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan 800a86fe353SMasahiro Yamada 80161754c18SMichal Marek# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the 80261754c18SMichal Marek# last assignments 80361754c18SMichal MarekKBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) 80461754c18SMichal MarekKBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) 80561754c18SMichal MarekKBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) 80652bcc330SSam Ravnborg 80718991197SRoland McGrath# Use --build-id when available. 80818991197SRoland McGrathLDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 809f86fd306SSam Ravnborg $(call cc-ldoption, -Wl$(comma)--build-id,)) 8106588169dSSam RavnborgKBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 81118991197SRoland McGrathLDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 81218991197SRoland McGrath 813b67067f1SNicholas Pigginifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 814b67067f1SNicholas PigginLDFLAGS_vmlinux += $(call ld-option, --gc-sections,) 815b67067f1SNicholas Pigginendif 816b67067f1SNicholas Piggin 8175d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 818d79a2719SAndi KleenLDFLAGS_vmlinux += $(call ld-option, -X,) 8195d7d18f5SDavid Howellsendif 8205d7d18f5SDavid Howells 8211da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 8221da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 8231da177e4SLinus Torvalds# set in the environment 8241da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 8251da177e4SLinus Torvalds# this default value 8261da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvalds# 8291da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 8301da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 8311da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 8321da177e4SLinus Torvalds 8331da177e4SLinus Torvalds# 834f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 835f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 836f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 837f4d4ffc0SJason Cooper# 838f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 839f4d4ffc0SJason Cooper 840f4d4ffc0SJason Cooper# 8411da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 8421da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 843070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 8441da177e4SLinus Torvalds# 8451da177e4SLinus Torvalds 846df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 8471da177e4SLinus Torvaldsexport MODLIB 8481da177e4SLinus Torvalds 849ac031f26STheodore Ts'o# 8502ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be 8512ea03891SSam Ravnborg# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 8522ea03891SSam Ravnborg# the default option --strip-debug will be used. Otherwise, 853177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command. 8542ea03891SSam Ravnborg 855ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP 856ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1) 8572ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug 858ac031f26STheodore Ts'oelse 8592ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 860ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1 861ac031f26STheodore Ts'oelse 8622ea03891SSam Ravnborgmod_strip_cmd = true 863ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP 864ac031f26STheodore Ts'oexport mod_strip_cmd 865ac031f26STheodore Ts'o 866beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 867beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 868beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ. 869beb50df3SBertrand Jacquin 870beb50df3SBertrand Jacquinmod_compress_cmd = true 871beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS 872beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_GZIP 8733d1450d5SJason A. Donenfeld mod_compress_cmd = gzip -n -f 874beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_GZIP 875beb50df3SBertrand Jacquin ifdef CONFIG_MODULE_COMPRESS_XZ 8763d1450d5SJason A. Donenfeld mod_compress_cmd = xz -f 877beb50df3SBertrand Jacquin endif # CONFIG_MODULE_COMPRESS_XZ 878beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS 879beb50df3SBertrand Jacquinexport mod_compress_cmd 880beb50df3SBertrand Jacquin 8811bf49dd4SP J P# Select initial ramdisk compression format, default is gzip(1). 8821bf49dd4SP J P# This shall be used by the dracut(8) tool while creating an initramfs image. 8831bf49dd4SP J P# 8847ac18156SJan BeulichINITRD_COMPRESS-y := gzip 8857ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 8867ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma 8877ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_XZ) := xz 8887ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo 8897ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 890b7000adeSLinus Torvalds# do not export INITRD_COMPRESS, since we didn't actually 891b7000adeSLinus Torvalds# choose a sane default compression above. 892b7000adeSLinus Torvalds# export INITRD_COMPRESS := $(INITRD_COMPRESS-y) 8931da177e4SLinus Torvalds 894d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL 8953ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY)) 8963ee550f1SDavid Woodhouse 8973ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 898e2a666d5SRusty Russellelse 899e2a666d5SRusty Russellmod_sign_cmd = true 900e2a666d5SRusty Russellendif 901e2a666d5SRusty Russellexport mod_sign_cmd 902e2a666d5SRusty Russell 903e2a666d5SRusty Russell 9041da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 905cfc411e7SDavid Howellscore-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 9061da177e4SLinus Torvalds 9071da177e4SLinus Torvaldsvmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 9081da177e4SLinus Torvalds $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 90937d9fe47SFeng Wu $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 9101da177e4SLinus Torvalds 9111da177e4SLinus Torvaldsvmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 91237d9fe47SFeng Wu $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) 9131da177e4SLinus Torvalds 9141da177e4SLinus Torvaldsinit-y := $(patsubst %/, %/built-in.o, $(init-y)) 9151da177e4SLinus Torvaldscore-y := $(patsubst %/, %/built-in.o, $(core-y)) 9161da177e4SLinus Torvaldsdrivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 9171da177e4SLinus Torvaldsnet-y := $(patsubst %/, %/built-in.o, $(net-y)) 9181da177e4SLinus Torvaldslibs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 9191da177e4SLinus Torvaldslibs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 9201da177e4SLinus Torvaldslibs-y := $(libs-y1) $(libs-y2) 92137d9fe47SFeng Wuvirt-y := $(patsubst %/, %/built-in.o, $(virt-y)) 9221da177e4SLinus Torvalds 9231f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 92495698570SSam Ravnborgexport KBUILD_VMLINUX_INIT := $(head-y) $(init-y) 92537d9fe47SFeng Wuexport KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y) 92695698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 9271f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux 9286615d6c3SMichal Marek# used by scripts/pacmage/Makefile 92937d9fe47SFeng Wuexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) 9301da177e4SLinus Torvalds 9311f2bfbd0SSam Ravnborgvmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) 9321da177e4SLinus Torvalds 9332441e78bSNicolas Pitre# Include targets which we want to execute sequentially if the rest of the 9342441e78bSNicolas Pitre# kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be 9352441e78bSNicolas Pitre# evaluated more than once. 9362441e78bSNicolas PitrePHONY += vmlinux_prereq 9372441e78bSNicolas Pitrevmlinux_prereq: $(vmlinux-deps) FORCE 9380f836e5fSDavid Woodhouseifdef CONFIG_HEADERS_CHECK 9390e7af8d0SDavid Woodhouse $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 9400f836e5fSDavid Woodhouseendif 9413ee7b3faSJan Kiszkaifdef CONFIG_GDB_SCRIPTS 9423ee7b3faSJan Kiszka $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py 9433ee7b3faSJan Kiszkaendif 9442441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS 945ba79d401SNicolas Ferre $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 9462441e78bSNicolas Pitre "$(MAKE) KBUILD_MODULES=1 -f $(srctree)/Makefile vmlinux_prereq" 9472441e78bSNicolas Pitreendif 94823121ca2SNicolas Pitre 94923121ca2SNicolas Pitre# standalone target for easier testing 95023121ca2SNicolas Pitreinclude/generated/autoksyms.h: FORCE 951ba79d401SNicolas Ferre $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true 95223121ca2SNicolas Pitre 953fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 954fbe6e37dSNicholas Piggin 955fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link 956fbe6e37dSNicholas Piggin cmd_link-vmlinux = \ 957fbe6e37dSNicholas Piggin $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \ 958fbe6e37dSNicholas Piggin $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 9592441e78bSNicolas Pitre 960edf69470SNicolas Pitrevmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE 9611f2bfbd0SSam Ravnborg +$(call if_changed,link-vmlinux) 962741f98feSSam Ravnborg 963dd92478aSNicolas Pitre# Build samples along the rest of the kernel 964dd92478aSNicolas Pitreifdef CONFIG_SAMPLES 965dd92478aSNicolas Pitrevmlinux-dirs += samples 966dd92478aSNicolas Pitreendif 967dd92478aSNicolas Pitre 9681da177e4SLinus Torvalds# The actual objects are generated when descending, 9691da177e4SLinus Torvalds# make sure no implicit rule kicks in 9701f2bfbd0SSam Ravnborg$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 9711da177e4SLinus Torvalds 9721da177e4SLinus Torvalds# Handle descending into subdirectories listed in $(vmlinux-dirs) 9731da177e4SLinus Torvalds# Preset locale variables to speed up the build process. Limit locale 9741da177e4SLinus Torvalds# tweaks to this spot to avoid wrong language settings when running 9751da177e4SLinus Torvalds# make menuconfig etc. 9761da177e4SLinus Torvalds# Error messages still appears in the original language 9771da177e4SLinus Torvalds 9784f193362SPaul SmithPHONY += $(vmlinux-dirs) 9795bb78269SSam Ravnborg$(vmlinux-dirs): prepare scripts 9801da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=$@ 9811da177e4SLinus Torvalds 9820d0e7718SMichal Marekdefine filechk_kernel.release 9830d0e7718SMichal Marek echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 9840d0e7718SMichal Marekendef 9850d0e7718SMichal Marek 98683a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 987f1d28fb0SRoman Zippelinclude/config/kernel.release: include/config/auto.conf FORCE 9880d0e7718SMichal Marek $(call filechk,kernel.release) 989cb58455cSSam Ravnborg 990cb58455cSSam Ravnborg 9911da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 9925bb78269SSam Ravnborg# or the modules are listed in "prepare". 9935bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 9945bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 9955bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 9961da177e4SLinus Torvalds 9975bb78269SSam Ravnborg# Listed in dependency order 9984f193362SPaul SmithPHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 9995bb78269SSam Ravnborg 100086feeaa8SSam Ravnborg# prepare3 is used to check if we are building in a separate output directory, 10011da177e4SLinus Torvalds# and if so do: 10021da177e4SLinus Torvalds# 1) Check that make has not been executed in the kernel src $(srctree) 1003f1d28fb0SRoman Zippelprepare3: include/config/kernel.release 10041da177e4SLinus Torvaldsifneq ($(KBUILD_SRC),) 1005fd54f502SMike Frysinger @$(kecho) ' Using $(srctree) as source for kernel' 1006c955ccafSRoman Zippel $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 10075369f550SMichal Marek echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ 10085369f550SMichal Marek echo >&2 " in the '$(srctree)' directory.";\ 10091da177e4SLinus Torvalds /bin/false; \ 10101da177e4SLinus Torvalds fi; 10111da177e4SLinus Torvaldsendif 10121da177e4SLinus Torvalds 1013c965b105SKees Cook# prepare2 creates a makefile if using a separate output directory. 1014c965b105SKees Cook# From this point forward, .config has been reprocessed, so any rules 1015c965b105SKees Cook# that need to depend on updated CONFIG_* values can be checked here. 1016c965b105SKees Cookprepare2: prepare3 prepare-compiler-check outputmakefile asm-generic 10171da177e4SLinus Torvalds 1018d183e6f5SDavid Howellsprepare1: prepare2 $(version_h) include/generated/utsrelease.h \ 1019f7f16b77SSam Ravnborg include/config/auto.conf 10207bb9d092SSam Ravnborg $(cmd_crmodverdir) 1021f2355416SNicolas Pitre $(Q)test -e include/generated/autoksyms.h || \ 1022f2355416SNicolas Pitre touch include/generated/autoksyms.h 10231da177e4SLinus Torvalds 10246520fe55SH. Peter Anvinarchprepare: archheaders archscripts prepare1 scripts_basic 10255bb78269SSam Ravnborg 10266b90bd4bSEmese Revfyprepare0: archprepare gcc-plugins 10278d36a623SSam Ravnborg $(Q)$(MAKE) $(build)=. 102886feeaa8SSam Ravnborg 10291da177e4SLinus Torvalds# All the preparing.. 1030b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool 1031b9ab5ebbSJosh Poimboeuf 10323b27a0c8SJosh Poimboeufifdef CONFIG_STACK_VALIDATION 1033c2bb9e32SSteven Rostedt has_libelf := $(call try-run,\ 1034c2bb9e32SSteven Rostedt echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) 10353b27a0c8SJosh Poimboeuf ifeq ($(has_libelf),1) 10363b27a0c8SJosh Poimboeuf objtool_target := tools/objtool FORCE 10373b27a0c8SJosh Poimboeuf else 1038b573d802SJean Delvare $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel") 10393b27a0c8SJosh Poimboeuf SKIP_STACK_VALIDATION := 1 10403b27a0c8SJosh Poimboeuf export SKIP_STACK_VALIDATION 10413b27a0c8SJosh Poimboeuf endif 10423b27a0c8SJosh Poimboeufendif 10433b27a0c8SJosh Poimboeuf 1044b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool 10453b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target) 10461da177e4SLinus Torvalds 1047c965b105SKees Cook# Check for CONFIG flags that require compiler support. Abort the build 1048c965b105SKees Cook# after .config has been processed, but before the kernel build starts. 1049c965b105SKees Cook# 1050c965b105SKees Cook# For security-sensitive CONFIG options, we don't want to fallback and/or 1051c965b105SKees Cook# silently change which compiler flags will be used, since that leads to 1052c965b105SKees Cook# producing kernels with different security feature characteristics 1053c965b105SKees Cook# depending on the compiler used. (For example, "But I selected 1054c965b105SKees Cook# CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!") 1055c965b105SKees CookPHONY += prepare-compiler-check 1056c965b105SKees Cookprepare-compiler-check: FORCE 1057c965b105SKees Cook# Make sure compiler supports requested stack protector flag. 1058c965b105SKees Cookifdef stackp-name 1059c965b105SKees Cook ifeq ($(call cc-option, $(stackp-flag)),) 1060c965b105SKees Cook @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ 1061c965b105SKees Cook $(stackp-flag) not supported by compiler >&2 && exit 1 1062c965b105SKees Cook endif 1063c965b105SKees Cookendif 1064c965b105SKees Cook# Make sure compiler does not have buggy stack-protector support. 1065c965b105SKees Cookifdef stackp-check 1066c965b105SKees Cook ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) 1067c965b105SKees Cook @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ 1068c965b105SKees Cook $(stackp-flag) available but compiler is broken >&2 && exit 1 1069c965b105SKees Cook endif 1070c965b105SKees Cookendif 1071c965b105SKees Cook @: 1072c965b105SKees Cook 10731da177e4SLinus Torvalds# Generate some files 10741da177e4SLinus Torvalds# --------------------------------------------------------------------------- 10751da177e4SLinus Torvalds 10761da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 10771da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 10781da177e4SLinus Torvalds 10791da177e4SLinus Torvaldsuts_len := 64 108063104eecSSam Ravnborgdefine filechk_utsrelease.h 10811da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 10821da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 10831da177e4SLinus Torvalds exit 1; \ 10841da177e4SLinus Torvalds fi; \ 108563104eecSSam Ravnborg (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 10861da177e4SLinus Torvaldsendef 10871da177e4SLinus Torvalds 108863104eecSSam Ravnborgdefine filechk_version.h 108963104eecSSam Ravnborg (echo \#define LINUX_VERSION_CODE $(shell \ 109078d3bb44SMichal Marek expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 109163104eecSSam Ravnborg echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 109263104eecSSam Ravnborgendef 109363104eecSSam Ravnborg 1094d183e6f5SDavid Howells$(version_h): $(srctree)/Makefile FORCE 10951da177e4SLinus Torvalds $(call filechk,version.h) 1096223c24a7SMichal Marek $(Q)rm -f $(old_version_h) 10971da177e4SLinus Torvalds 1098273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 109963104eecSSam Ravnborg $(call filechk,utsrelease.h) 110063104eecSSam Ravnborg 1101179efcb4SVegard NossumPHONY += headerdep 1102179efcb4SVegard Nossumheaderdep: 11039663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 11049663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1105179efcb4SVegard Nossum 11061da177e4SLinus Torvalds# --------------------------------------------------------------------------- 110788ecf814SDavid Woodhouse# Firmware install 110888ecf814SDavid WoodhouseINSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 110988ecf814SDavid Woodhouseexport INSTALL_FW_PATH 111088ecf814SDavid Woodhouse 111188ecf814SDavid WoodhousePHONY += firmware_install 11122e8d696bSMasahiro Yamadafirmware_install: 111388ecf814SDavid Woodhouse @mkdir -p $(objtree)/firmware 111488ecf814SDavid Woodhouse $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 111588ecf814SDavid Woodhouse 111688ecf814SDavid Woodhouse# --------------------------------------------------------------------------- 11178d730cfbSDavid Woodhouse# Kernel headers 11188d730cfbSDavid Woodhouse 1119e6883b18SSam Ravnborg#Default location for installed headers 1120e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1121e6883b18SSam Ravnborg 11222fb9b1bdSSam Ravnborg# If we do an all arch process set dst to asm-$(hdr-arch) 11232fb9b1bdSSam Ravnborghdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1124e6883b18SSam Ravnborg 1125052ad274SH. Peter AnvinPHONY += archheaders 1126052ad274SH. Peter Anvinarchheaders: 1127052ad274SH. Peter Anvin 11286520fe55SH. Peter AnvinPHONY += archscripts 11296520fe55SH. Peter Anvinarchscripts: 11306520fe55SH. Peter Anvin 1131e6883b18SSam RavnborgPHONY += __headers 11322e8d696bSMasahiro Yamada__headers: $(version_h) scripts_basic asm-generic archheaders archscripts 1133e1b702cfSMike Waychison $(Q)$(MAKE) $(build)=scripts build_unifdef 11346d716275SDavid Woodhouse 11356d716275SDavid WoodhousePHONY += headers_install_all 11362fb9b1bdSSam Ravnborgheaders_install_all: 11372fb9b1bdSSam Ravnborg $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 11386d716275SDavid Woodhouse 11398d730cfbSDavid WoodhousePHONY += headers_install 1140e6883b18SSam Ravnborgheaders_install: __headers 114110b63956SDavid Howells $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \ 11422fb9b1bdSSam Ravnborg $(error Headers not exportable for the $(SRCARCH) architecture)) 114310b63956SDavid Howells $(Q)$(MAKE) $(hdr-inst)=include/uapi 114410b63956SDavid Howells $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) 11458d730cfbSDavid Woodhouse 11461f85712eSMike FrysingerPHONY += headers_check_all 11471f85712eSMike Frysingerheaders_check_all: headers_install_all 11482fb9b1bdSSam Ravnborg $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 11491f85712eSMike Frysinger 115068475359SDavid WoodhousePHONY += headers_check 115168475359SDavid Woodhouseheaders_check: headers_install 115210b63956SDavid Howells $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 115310b63956SDavid Howells $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1 115468475359SDavid Woodhouse 11558d730cfbSDavid Woodhouse# --------------------------------------------------------------------------- 11565a5da78bSShuah Khan# Kernel selftest 11575a5da78bSShuah Khan 11585a5da78bSShuah KhanPHONY += kselftest 11595a5da78bSShuah Khankselftest: 11605a5da78bSShuah Khan $(Q)$(MAKE) -C tools/testing/selftests run_tests 11615a5da78bSShuah Khan 1162dcb825a9SWang Longkselftest-clean: 1163dcb825a9SWang Long $(Q)$(MAKE) -C tools/testing/selftests clean 1164dcb825a9SWang Long 11653d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge 11663d6dee7aSBamvor Jian Zhangkselftest-merge: 11673d6dee7aSBamvor Jian Zhang $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 11683d6dee7aSBamvor Jian Zhang $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 11693d6dee7aSBamvor Jian Zhang -m $(objtree)/.config \ 11703d6dee7aSBamvor Jian Zhang $(srctree)/tools/testing/selftests/*/config 11713d6dee7aSBamvor Jian Zhang +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 11723d6dee7aSBamvor Jian Zhang 11735a5da78bSShuah Khan# --------------------------------------------------------------------------- 11741da177e4SLinus Torvalds# Modules 11751da177e4SLinus Torvalds 11761da177e4SLinus Torvaldsifdef CONFIG_MODULES 11771da177e4SLinus Torvalds 11781da177e4SLinus Torvalds# By default, build modules as well 11791da177e4SLinus Torvalds 118073d1393eSMichal Marekall: modules 11811da177e4SLinus Torvalds 11821da177e4SLinus Torvalds# Build modules 1183551559e1STejun Heo# 1184551559e1STejun Heo# A module can be listed more than once in obj-m resulting in 1185551559e1STejun Heo# duplicate lines in modules.order files. Those are removed 1186551559e1STejun Heo# using awk while concatenating to the final file. 11871da177e4SLinus Torvalds 11884f193362SPaul SmithPHONY += modules 11892da30e70SMichal Marekmodules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1190551559e1STejun Heo $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1191fd54f502SMike Frysinger @$(kecho) ' Building modules, stage 2.'; 1192b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 119344463f7dSDavid Woodhouse $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 11941da177e4SLinus Torvalds 1195a6c36632SMichal Marekmodules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1196a6c36632SMichal Marek $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1197a6c36632SMichal Marek 119873d1393eSMichal Marek%/modules.builtin: include/config/auto.conf 1199a6c36632SMichal Marek $(Q)$(MAKE) $(modbuiltin)=$* 1200a6c36632SMichal Marek 12011da177e4SLinus Torvalds 12021da177e4SLinus Torvalds# Target to prepare building external modules 12034f193362SPaul SmithPHONY += modules_prepare 12045bb78269SSam Ravnborgmodules_prepare: prepare scripts 12051da177e4SLinus Torvalds 12061da177e4SLinus Torvalds# Target to install modules 12074f193362SPaul SmithPHONY += modules_install 12081da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post 12091da177e4SLinus Torvalds 12104f193362SPaul SmithPHONY += _modinst_ 12112da30e70SMichal Marek_modinst_: 12121da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 12131da177e4SLinus Torvalds @rm -f $(MODLIB)/source 12141da177e4SLinus Torvalds @mkdir -p $(MODLIB)/kernel 1215890676c6SMichal Marek @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source 12161da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 12171da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 12187e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 12191da177e4SLinus Torvalds fi 1220551559e1STejun Heo @cp -f $(objtree)/modules.order $(MODLIB)/ 1221bc081dd6SMichal Marek @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1222b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 12231da177e4SLinus Torvalds 122450a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial 12251da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write. However the 12261da177e4SLinus Torvalds# boot script depmod is the master version. 12274f193362SPaul SmithPHONY += _modinst_post 12286d128e1eSLinus Torvalds_modinst_post: _modinst_ 122988ecf814SDavid Woodhouse $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 123050a8ec31SSam Ravnborg $(call cmd,depmod) 12311da177e4SLinus Torvalds 1232d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y) 1233d890f510SJosh BoyerPHONY += modules_sign 1234d890f510SJosh Boyermodules_sign: 1235d890f510SJosh Boyer $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1236d890f510SJosh Boyerendif 1237d890f510SJosh Boyer 12381da177e4SLinus Torvaldselse # CONFIG_MODULES 12391da177e4SLinus Torvalds 12401da177e4SLinus Torvalds# Modules not configured 12411da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12421da177e4SLinus Torvalds 1243612e47ceSMasahiro YamadaPHONY += modules modules_install 1244612e47ceSMasahiro Yamadamodules modules_install: 12455369f550SMichal Marek @echo >&2 12465369f550SMichal Marek @echo >&2 "The present kernel configuration has modules disabled." 12475369f550SMichal Marek @echo >&2 "Type 'make config' and enable loadable module support." 12485369f550SMichal Marek @echo >&2 "Then build a kernel with module support enabled." 12495369f550SMichal Marek @echo >&2 12501da177e4SLinus Torvalds @exit 1 12511da177e4SLinus Torvalds 12521da177e4SLinus Torvaldsendif # CONFIG_MODULES 12531da177e4SLinus Torvalds 12541da177e4SLinus Torvalds### 12551da177e4SLinus Torvalds# Cleaning is done on three levels. 12561da177e4SLinus Torvalds# make clean Delete most generated files 12571da177e4SLinus Torvalds# Leave enough to build external modules 12581da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 12591da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 12601da177e4SLinus Torvalds 12611da177e4SLinus Torvalds# Directories & files removed with 'make clean' 12621da177e4SLinus TorvaldsCLEAN_DIRS += $(MODVERDIR) 12631da177e4SLinus Torvalds 12641da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 1265d8ecc5cdSSam RavnborgMRPROPER_DIRS += include/config usr/include include/generated \ 126679192ca8SJason Cooper arch/*/include/generated .tmp_objdiff 1267c22bd32cSMasahiro YamadaMRPROPER_FILES += .config .config.old .version .old_version \ 1268d5b71936SRusty Russell Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ 1269fb117949SDavid Woodhouse signing_key.pem signing_key.priv signing_key.x509 \ 1270fb117949SDavid Woodhouse x509.genkey extra_certificates signing_key.x509.keyid \ 12713ee7b3faSJan Kiszka signing_key.x509.signer vmlinux-gdb.py 12721da177e4SLinus Torvalds 12731da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 12741da177e4SLinus Torvalds# 12751da177e4SLinus Torvaldsclean: rm-dirs := $(CLEAN_DIRS) 12761da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 1277fb68d4beSGerard Snitselaarclean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) 12781da177e4SLinus Torvalds 1279bd1ee804SPawel MollPHONY += $(clean-dirs) clean archclean vmlinuxclean 12801da177e4SLinus Torvalds$(clean-dirs): 12811da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 12821da177e4SLinus Torvalds 1283bd1ee804SPawel Mollvmlinuxclean: 1284bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1285fbe6e37dSNicholas Piggin $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1286bd1ee804SPawel Moll 1287bd1ee804SPawel Mollclean: archclean vmlinuxclean 12881da177e4SLinus Torvalds 12891da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 12901da177e4SLinus Torvalds# 12911da177e4SLinus Torvaldsmrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 12921da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 12931da177e4SLinus Torvaldsmrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 12941da177e4SLinus Torvalds 12954f193362SPaul SmithPHONY += $(mrproper-dirs) mrproper archmrproper 12961da177e4SLinus Torvalds$(mrproper-dirs): 12971da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 12981da177e4SLinus Torvalds 12991da177e4SLinus Torvaldsmrproper: clean archmrproper $(mrproper-dirs) 13001da177e4SLinus Torvalds $(call cmd,rmdirs) 13011da177e4SLinus Torvalds $(call cmd,rmfiles) 13021da177e4SLinus Torvalds 13031da177e4SLinus Torvalds# distclean 13041da177e4SLinus Torvalds# 13054f193362SPaul SmithPHONY += distclean 13061da177e4SLinus Torvalds 13071da177e4SLinus Torvaldsdistclean: mrproper 13081da177e4SLinus Torvalds @find $(srctree) $(RCS_FIND_IGNORE) \ 13091da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 13101da177e4SLinus Torvalds -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1311a03fcb50SMasahiro Yamada -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \ 13121da177e4SLinus Torvalds -type f -print | xargs rm -f 13131da177e4SLinus Torvalds 13141da177e4SLinus Torvalds 13151da177e4SLinus Torvalds# Packaging of the kernel to various formats 13161da177e4SLinus Torvalds# --------------------------------------------------------------------------- 13171da177e4SLinus Torvalds# rpm target kept for backward compatibility 1318c79624c1SMichal Marekpackage-dir := scripts/package 13191da177e4SLinus Torvalds 1320bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1321bafb6747SArnaldo Carvalho de Melo $(Q)$(MAKE) $(build)=$(package-dir) $@ 1322031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 13236c2133e1SSam Ravnborg $(Q)$(MAKE) $(build)=$(package-dir) $@ 1324031ecc6dSZach Brownrpm: include/config/kernel.release FORCE 13256c2133e1SSam Ravnborg $(Q)$(MAKE) $(build)=$(package-dir) $@ 13261da177e4SLinus Torvalds 13271da177e4SLinus Torvalds 13281da177e4SLinus Torvalds# Brief documentation of the typical targets used 13291da177e4SLinus Torvalds# --------------------------------------------------------------------------- 13301da177e4SLinus Torvalds 13315dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1332a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards))) 13335dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 13345dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 13351da177e4SLinus Torvalds 1336fe69b420SMasahiro YamadaPHONY += help 13371da177e4SLinus Torvaldshelp: 13381da177e4SLinus Torvalds @echo 'Cleaning targets:' 13395ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 13405cc8d246SJesper Juhl @echo ' enough build support to build external modules' 13415ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 13425cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 13431da177e4SLinus Torvalds @echo '' 13441da177e4SLinus Torvalds @echo 'Configuration targets:' 13451da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 13461da177e4SLinus Torvalds @echo '' 13471da177e4SLinus Torvalds @echo 'Other generic targets:' 13481da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 13491da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 13501da177e4SLinus Torvalds @echo '* modules - Build all modules' 13519cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 135288ecf814SDavid Woodhouse @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 135388ecf814SDavid Woodhouse @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 13541da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 135540ab87a4SWang YanQing @echo ' dir/file.[ois] - Build specified target only' 135662718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 135762718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1358155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1359c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 13601da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 13611da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1362f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 13633f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 13643f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 13653f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 13662fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 136759df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 13682fb9b1bdSSam Ravnborg echo '' 13691da177e4SLinus Torvalds @echo 'Static analysers' 13701da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 13711da177e4SLinus Torvalds @echo ' namespacecheck - Name space analysis on compiled kernel' 1372aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1373ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1374295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 1375179efcb4SVegard Nossum @echo ' headers_check - Sanity check on exported headers' 137674425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 137774425eeeSNicolas Palix @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help 137874425eeeSNicolas Palix @echo '' 13795a5da78bSShuah Khan @echo 'Kernel selftest' 13805a5da78bSShuah Khan @echo ' kselftest - Build and run kernel selftest (run as root)' 13815a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 13825a5da78bSShuah Khan @echo ' running kselftest on it' 1383dcb825a9SWang Long @echo ' kselftest-clean - Remove all generated kselftest files' 13843d6dee7aSBamvor Jian Zhang @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existed' 13853d6dee7aSBamvor Jian Zhang @echo ' .config.' 13865a5da78bSShuah Khan @echo '' 13871da177e4SLinus Torvalds @echo 'Kernel packaging:' 13886c2133e1SSam Ravnborg @$(MAKE) $(build)=$(package-dir) help 13891da177e4SLinus Torvalds @echo '' 13901da177e4SLinus Torvalds @echo 'Documentation targets:' 1391ebc88ef0SJani Nikula @$(MAKE) -f $(srctree)/Documentation/Makefile.sphinx dochelp 1392ebc88ef0SJani Nikula @echo '' 13931da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 13941da177e4SLinus Torvalds @echo '' 139501dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 13961da177e4SLinus Torvalds @$(if $(archhelp),$(archhelp),\ 139701dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 13981da177e4SLinus Torvalds @echo '' 13991da177e4SLinus Torvalds @$(if $(boards), \ 14001da177e4SLinus Torvalds $(foreach b, $(boards), \ 14011da177e4SLinus Torvalds printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 14021da177e4SLinus Torvalds echo '') 14035dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 14045dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 14055dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 14065dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 14075dffbe81SSegher Boessenkool echo '') 14081da177e4SLinus Torvalds 14091da177e4SLinus Torvalds @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 141045d506bdSSam Ravnborg @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 14111da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1412701842e3SDustin Kirkland @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1413701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1414af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 141528bc20dcSSam Ravnborg @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 141628bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 141728bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 141828bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1419a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 14201da177e4SLinus Torvalds @echo '' 14211da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 14221da177e4SLinus Torvalds @echo 'For further info see the ./README file' 14231da177e4SLinus Torvalds 14241da177e4SLinus Torvalds 14255dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 14265dffbe81SSegher Boessenkool 14275dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 14285dffbe81SSegher Boessenkool 1429fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 14305dffbe81SSegher Boessenkool 14315dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 14325dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 14335dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 14345dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 14355dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 14365dffbe81SSegher Boessenkool echo '') 14375dffbe81SSegher Boessenkool 14385dffbe81SSegher Boessenkool 14391da177e4SLinus Torvalds# Documentation targets 14401da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1441d565127dSMauro Carvalho ChehabDOC_TARGETS := xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs 144222cba31bSJani NikulaPHONY += $(DOC_TARGETS) 144322cba31bSJani Nikula$(DOC_TARGETS): scripts_basic FORCE 1444b479bfd0SBen Hutchings $(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype 144522cba31bSJani Nikula $(Q)$(MAKE) $(build)=Documentation -f $(srctree)/Documentation/Makefile.sphinx $@ 14461da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 14471da177e4SLinus Torvalds 14481da177e4SLinus Torvaldselse # KBUILD_EXTMOD 14491da177e4SLinus Torvalds 14501da177e4SLinus Torvalds### 14511da177e4SLinus Torvalds# External module support. 14521da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 14531da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 14541da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 14551da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must 14561da177e4SLinus Torvalds# be used. 14571da177e4SLinus Torvalds# 14581da177e4SLinus Torvalds# The following are the only valid targets when building external 14591da177e4SLinus Torvalds# modules. 14601da177e4SLinus Torvalds# make M=dir clean Delete all automatically generated files 14611da177e4SLinus Torvalds# make M=dir modules Make all modules in specified dir 14621da177e4SLinus Torvalds# make M=dir Same as 'make M=dir modules' 14631da177e4SLinus Torvalds# make M=dir modules_install 1464070b98bfSSam Ravnborg# Install the modules built in the module directory 14651da177e4SLinus Torvalds# Assumes install directory is already created 14661da177e4SLinus Torvalds 14671da177e4SLinus Torvalds# We are always building modules 14681da177e4SLinus TorvaldsKBUILD_MODULES := 1 14694f193362SPaul SmithPHONY += crmodverdir 14701da177e4SLinus Torvaldscrmodverdir: 14717bb9d092SSam Ravnborg $(cmd_crmodverdir) 14721da177e4SLinus Torvalds 14734f193362SPaul SmithPHONY += $(objtree)/Module.symvers 14741da177e4SLinus Torvalds$(objtree)/Module.symvers: 14751da177e4SLinus Torvalds @test -e $(objtree)/Module.symvers || ( \ 14761da177e4SLinus Torvalds echo; \ 14771da177e4SLinus Torvalds echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 14781da177e4SLinus Torvalds echo " is missing; modules will have no dependencies and modversions."; \ 14791da177e4SLinus Torvalds echo ) 14801da177e4SLinus Torvalds 14811da177e4SLinus Torvaldsmodule-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 14824f193362SPaul SmithPHONY += $(module-dirs) modules 14831da177e4SLinus Torvalds$(module-dirs): crmodverdir $(objtree)/Module.symvers 14841da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 14851da177e4SLinus Torvalds 14861da177e4SLinus Torvaldsmodules: $(module-dirs) 1487fd54f502SMike Frysinger @$(kecho) ' Building modules, stage 2.'; 1488b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 14891da177e4SLinus Torvalds 14904f193362SPaul SmithPHONY += modules_install 1491a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post 1492a67dc21aSSam Ravnborg 1493a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 14944f193362SPaul SmithPHONY += _emodinst_ 1495a67dc21aSSam Ravnborg_emodinst_: 1496a67dc21aSSam Ravnborg $(Q)mkdir -p $(MODLIB)/$(install-dir) 1497b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 14981da177e4SLinus Torvalds 14994f193362SPaul SmithPHONY += _emodinst_post 1500a67dc21aSSam Ravnborg_emodinst_post: _emodinst_ 1501a67dc21aSSam Ravnborg $(call cmd,depmod) 1502a67dc21aSSam Ravnborg 15031da177e4SLinus Torvaldsclean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 15041da177e4SLinus Torvalds 15054f193362SPaul SmithPHONY += $(clean-dirs) clean 15061da177e4SLinus Torvalds$(clean-dirs): 15071da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 15081da177e4SLinus Torvalds 15091da177e4SLinus Torvaldsclean: rm-dirs := $(MODVERDIR) 151088d7be03SMichal Marekclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 15111da177e4SLinus Torvalds 1512fe69b420SMasahiro YamadaPHONY += help 15131da177e4SLinus Torvaldshelp: 15141da177e4SLinus Torvalds @echo ' Building external modules.' 15151da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 15161da177e4SLinus Torvalds @echo '' 15171da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 15181da177e4SLinus Torvalds @echo ' modules_install - install the module' 15191da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 15201da177e4SLinus Torvalds @echo '' 152106300b21SSam Ravnborg 152206300b21SSam Ravnborg# Dummies... 15234f193362SPaul SmithPHONY += prepare scripts 152406300b21SSam Ravnborgprepare: ; 152506300b21SSam Ravnborgscripts: ; 15261da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 15271da177e4SLinus Torvalds 152888d7be03SMichal Marekclean: $(clean-dirs) 152988d7be03SMichal Marek $(call cmd,rmdirs) 153088d7be03SMichal Marek $(call cmd,rmfiles) 153143f67c98SKevin Cernekee @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 153288d7be03SMichal Marek \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1533addbcdbbSDavid Howells -o -name '*.ko.*' \ 1534866ced95SAndi Kleen -o -name '*.dwo' \ 1535d523b255SRasmus Villemoes -o -name '*.su' \ 153688d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 153788d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 153888d7be03SMichal Marek -o -name modules.builtin -o -name '.tmp_*.o.*' \ 15396b90bd4bSEmese Revfy -o -name '*.c.[012]*.*' \ 154088d7be03SMichal Marek -o -name '*.gcno' \) -type f -print | xargs rm -f 154188d7be03SMichal Marek 15421da177e4SLinus Torvalds# Generate tags for editors 15431da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1544a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 1545a680eedcSSam Ravnborg cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 15461da177e4SLinus Torvalds 1547f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 15481da177e4SLinus Torvalds $(call cmd,tags) 15491da177e4SLinus Torvalds 15501da177e4SLinus Torvalds# Scripts to check various things for consistency 15511da177e4SLinus Torvalds# --------------------------------------------------------------------------- 15521da177e4SLinus Torvalds 1553279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report 1554279f3dd3SPeter Foley 15551da177e4SLinus Torvaldsincludecheck: 1556436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 15571da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 155880007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 15591da177e4SLinus Torvalds 15601da177e4SLinus Torvaldsversioncheck: 15612ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 15621da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 156380007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 15641da177e4SLinus Torvalds 156574425eeeSNicolas Palixcoccicheck: 156674425eeeSNicolas Palix $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 156774425eeeSNicolas Palix 15681da177e4SLinus Torvaldsnamespacecheck: 15691da177e4SLinus Torvalds $(PERL) $(srctree)/scripts/namespace.pl 15701da177e4SLinus Torvalds 1571295ac051SAdrian Bunkexport_report: 1572295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 1573295ac051SAdrian Bunk 15741da177e4SLinus Torvaldsendif #ifeq ($(config-targets),1) 15751da177e4SLinus Torvaldsendif #ifeq ($(mixed-targets),1) 15761da177e4SLinus Torvalds 1577c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 1578e3ccf6e3SJeff Dike 1579011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 1580011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1581011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 1582011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 1583011e3a9aSJeff Dikeifeq ($(ARCH), um) 1584011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 1585011e3a9aSJeff Dikeelse 1586011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 1587011e3a9aSJeff Dikeendif 15881da177e4SLinus Torvaldscheckstack: 15891da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1590011e3a9aSJeff Dike $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 15911da177e4SLinus Torvalds 15927b8ea53dSAmerigo Wangkernelrelease: 15937b8ea53dSAmerigo Wang @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 159401ab1788SAmerigo Wang 1595cb58455cSSam Ravnborgkernelversion: 15962244cbd8SSam Ravnborg @echo $(KERNELVERSION) 15971da177e4SLinus Torvalds 1598c398ff00SMike Marciniszynimage_name: 1599c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 1600c398ff00SMike Marciniszyn 1601ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake 1602ea01fa9fSBorislav Petkovtools/: FORCE 1603bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 1604e17cf3a8SJosh Poimboeuf $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ 1605ea01fa9fSBorislav Petkov 1606ea01fa9fSBorislav Petkovtools/%: FORCE 1607bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 1608e17cf3a8SJosh Poimboeuf $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $* 1609ea01fa9fSBorislav Petkov 161006300b21SSam Ravnborg# Single targets 161106300b21SSam Ravnborg# --------------------------------------------------------------------------- 1612bc2546a6SSam Ravnborg# Single targets are compatible with: 1613e1b8513dSRobert P. J. Day# - build with mixed source and output 1614bc2546a6SSam Ravnborg# - build with separate output dir 'make O=...' 1615bc2546a6SSam Ravnborg# - external modules 1616bc2546a6SSam Ravnborg# 1617bc2546a6SSam Ravnborg# target-dir => where to store outputfile 1618bc2546a6SSam Ravnborg# build-dir => directory in kernel source tree to use 161906300b21SSam Ravnborg 162006300b21SSam Ravnborgifeq ($(KBUILD_EXTMOD),) 1621aa360879SSam Ravnborg build-dir = $(patsubst %/,%,$(dir $@)) 1622bc2546a6SSam Ravnborg target-dir = $(dir $@) 162306300b21SSam Ravnborgelse 162406300b21SSam Ravnborg zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1625bc2546a6SSam Ravnborg build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1626bc2546a6SSam Ravnborg target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 162706300b21SSam Ravnborgendif 162806300b21SSam Ravnborg 1629bc2546a6SSam Ravnborg%.s: %.c prepare scripts FORCE 1630bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1631bc2546a6SSam Ravnborg%.i: %.c prepare scripts FORCE 1632bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1633bc2546a6SSam Ravnborg%.o: %.c prepare scripts FORCE 1634bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1635bc2546a6SSam Ravnborg%.lst: %.c prepare scripts FORCE 1636bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1637bc2546a6SSam Ravnborg%.s: %.S prepare scripts FORCE 1638bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1639bc2546a6SSam Ravnborg%.o: %.S prepare scripts FORCE 1640bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 164115fde675SAndreas Gruenbacher%.symtypes: %.c prepare scripts FORCE 164215fde675SAndreas Gruenbacher $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1643bc2546a6SSam Ravnborg 1644bc2546a6SSam Ravnborg# Modules 164531110ebbSSam Ravnborg/: prepare scripts FORCE 164631110ebbSSam Ravnborg $(cmd_crmodverdir) 164731110ebbSSam Ravnborg $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 164831110ebbSSam Ravnborg $(build)=$(build-dir) 16498e2faea8SPeter Foley# Make sure the latest headers are built for Documentation 1650ddea05faSArnd BergmannDocumentation/ samples/: headers_install 165131110ebbSSam Ravnborg%/: prepare scripts FORCE 16527bb9d092SSam Ravnborg $(cmd_crmodverdir) 165306300b21SSam Ravnborg $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1654bc2546a6SSam Ravnborg $(build)=$(build-dir) 1655bc2546a6SSam Ravnborg%.ko: prepare scripts FORCE 16567bb9d092SSam Ravnborg $(cmd_crmodverdir) 165706300b21SSam Ravnborg $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1658bc2546a6SSam Ravnborg $(build)=$(build-dir) $(@:.ko=.o) 1659b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 166006300b21SSam Ravnborg 16611da177e4SLinus Torvalds# FIXME Should go into a make.lib or something 16621da177e4SLinus Torvalds# =========================================================================== 16631da177e4SLinus Torvalds 16641da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 16651da177e4SLinus Torvalds cmd_rmdirs = rm -rf $(rm-dirs) 16661da177e4SLinus Torvalds 16671da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 16681da177e4SLinus Torvalds cmd_rmfiles = rm -f $(rm-files) 16691da177e4SLinus Torvalds 1670bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable 167150a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1672569658ddSMichal Marek cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1673b92021b0SRusty Russell $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))" 167450a8ec31SSam Ravnborg 16757bb9d092SSam Ravnborg# Create temporary dir for module support files 1676ab19f879SSam Ravnborg# clean it up only when building all modules 1677ab19f879SSam Ravnborgcmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1678ab19f879SSam Ravnborg $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 16791da177e4SLinus Torvalds 16801da177e4SLinus Torvalds# read all saved command lines 16811da177e4SLinus Torvalds 16821da177e4SLinus Torvaldstargets := $(wildcard $(sort $(targets))) 16831da177e4SLinus Torvaldscmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 16841da177e4SLinus Torvalds 16851da177e4SLinus Torvaldsifneq ($(cmd_files),) 16861da177e4SLinus Torvalds $(cmd_files): ; # Do not try to update included dependency files 16871da177e4SLinus Torvalds include $(cmd_files) 16881da177e4SLinus Torvaldsendif 16891da177e4SLinus Torvalds 16901da177e4SLinus Torvaldsendif # skip-makefile 16911da177e4SLinus Torvalds 16924f193362SPaul SmithPHONY += FORCE 16931da177e4SLinus TorvaldsFORCE: 16944f193362SPaul Smith 16954f193362SPaul Smith# Declare the contents of the .PHONY variable as phony. We keep that 1696fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 16974f193362SPaul Smith.PHONY: $(PHONY) 1698