155922c9dSLinus TorvaldsVERSION = 3 27d1311b9SLinus TorvaldsPATCHLEVEL = 17 355922c9dSLinus TorvaldsSUBLEVEL = 0 47d1311b9SLinus TorvaldsEXTRAVERSION = -rc1 538dbfb59SLinus TorvaldsNAME = Shuffling Zombie Juror 61da177e4SLinus Torvalds 71da177e4SLinus Torvalds# *DOCUMENTATION* 81da177e4SLinus Torvalds# To see a list of typical targets execute "make help" 91da177e4SLinus Torvalds# More info can be located in ./README 101da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not 111da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file. 121da177e4SLinus Torvalds 13*7ff52571SMasahiro Yamada# Do not use make's built-in rules and variables 14d384e35aSLinus Nilsson# (this increases performance and avoids hard-to-debug behaviour); 15*7ff52571SMasahiro YamadaMAKEFLAGS += -rR 161da177e4SLinus Torvalds 17c051346bSH. Peter Anvin# Avoid funny character set dependencies 1806b5dc64SH. Peter Anvinunexport LC_ALL 19c051346bSH. Peter AnvinLC_COLLATE=C 20c051346bSH. Peter AnvinLC_NUMERIC=C 2107105202SMichal Marekexport LC_COLLATE LC_NUMERIC 22c051346bSH. Peter Anvin 23ab7474eaSBorislav Petkov# Avoid interference with shell env settings 24ab7474eaSBorislav Petkovunexport GREP_OPTIONS 25ab7474eaSBorislav Petkov 261da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking 271da177e4SLinus Torvalds# to get the ordering right. 281da177e4SLinus Torvalds# 291da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in 301da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on 311da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often 321da177e4SLinus Torvalds# unavoidable when linking the built-in.o targets which finally 331da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and 341da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir 351da177e4SLinus Torvalds# is now up to date. 361da177e4SLinus Torvalds# 371da177e4SLinus Torvalds# The only cases where we need to modify files which have global 381da177e4SLinus Torvalds# effects are thus separated out and done before the recursive 391da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the 401da177e4SLinus Torvalds# prepare rule. 411da177e4SLinus Torvalds 42066b7ed9SMichal Marek# Beautify output 43066b7ed9SMichal Marek# --------------------------------------------------------------------------- 44066b7ed9SMichal Marek# 45066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making 46066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set 47066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g. 48066b7ed9SMichal Marek# 49066b7ed9SMichal Marek# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 50066b7ed9SMichal Marek# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 51066b7ed9SMichal Marek# 52066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed. 53066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed. 54066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since 55066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist. 56066b7ed9SMichal Marek# 57066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful 58066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode. 59066b7ed9SMichal Marek# 60066b7ed9SMichal Marek# $(Q)ln $@ :< 61066b7ed9SMichal Marek# 62066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 63066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed. 64066b7ed9SMichal Marek# 651da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default 661da177e4SLinus Torvalds# Use 'make V=1' to see the full commands 671da177e4SLinus Torvalds 681da177e4SLinus Torvaldsifeq ("$(origin V)", "command line") 691da177e4SLinus Torvalds KBUILD_VERBOSE = $(V) 701da177e4SLinus Torvaldsendif 711da177e4SLinus Torvaldsifndef KBUILD_VERBOSE 721da177e4SLinus Torvalds KBUILD_VERBOSE = 0 731da177e4SLinus Torvaldsendif 741da177e4SLinus Torvalds 75066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1) 76066b7ed9SMichal Marek quiet = 77066b7ed9SMichal Marek Q = 78066b7ed9SMichal Marekelse 79066b7ed9SMichal Marek quiet=quiet_ 80066b7ed9SMichal Marek Q = @ 81066b7ed9SMichal Marekendif 82066b7ed9SMichal Marek 83066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of 84066b7ed9SMichal Marek# commands 85066b7ed9SMichal Marek 86066b7ed9SMichal Marekifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4 87066b7ed9SMichal Marekifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),) 88066b7ed9SMichal Marek quiet=silent_ 89066b7ed9SMichal Marekendif 90066b7ed9SMichal Marekelse # make-3.8x 91066b7ed9SMichal Marekifneq ($(filter s% -s%,$(MAKEFLAGS)),) 92066b7ed9SMichal Marek quiet=silent_ 93066b7ed9SMichal Marekendif 94066b7ed9SMichal Marekendif 95066b7ed9SMichal Marek 96066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE 97066b7ed9SMichal Marek 981c7bafe7SRobert P. J. Day# Call a source code checker (by default, "sparse") as part of the 991c7bafe7SRobert P. J. Day# C compilation. 1001c7bafe7SRobert P. J. Day# 1011c7bafe7SRobert P. J. Day# Use 'make C=1' to enable checking of only re-compiled files. 1021c7bafe7SRobert P. J. Day# Use 'make C=2' to enable checking of *all* source files, regardless 1031c7bafe7SRobert P. J. Day# of whether they are re-compiled or not. 1041c7bafe7SRobert P. J. Day# 1051c7bafe7SRobert P. J. Day# See the file "Documentation/sparse.txt" for more details, including 1061c7bafe7SRobert P. J. Day# where to get the "sparse" utility. 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvaldsifeq ("$(origin C)", "command line") 1091da177e4SLinus Torvalds KBUILD_CHECKSRC = $(C) 1101da177e4SLinus Torvaldsendif 1111da177e4SLinus Torvaldsifndef KBUILD_CHECKSRC 1121da177e4SLinus Torvalds KBUILD_CHECKSRC = 0 1131da177e4SLinus Torvaldsendif 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds# Use make M=dir to specify directory of external module to build 1161da177e4SLinus Torvalds# Old syntax make ... SUBDIRS=$PWD is still supported 1171da177e4SLinus Torvalds# Setting the environment variable KBUILD_EXTMOD take precedence 1181da177e4SLinus Torvaldsifdef SUBDIRS 1191da177e4SLinus Torvalds KBUILD_EXTMOD ?= $(SUBDIRS) 1201da177e4SLinus Torvaldsendif 121b8b0618cSCheng Renquan 1221da177e4SLinus Torvaldsifeq ("$(origin M)", "command line") 1231da177e4SLinus Torvalds KBUILD_EXTMOD := $(M) 1241da177e4SLinus Torvaldsendif 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds# kbuild supports saving output files in a separate directory. 1271da177e4SLinus Torvalds# To locate output files in a separate directory two syntaxes are supported. 1281da177e4SLinus Torvalds# In both cases the working directory must be the root of the kernel src. 1291da177e4SLinus Torvalds# 1) O= 1301da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/" 1311da177e4SLinus Torvalds# 1321da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT 1331da177e4SLinus Torvalds# Set the environment variable KBUILD_OUTPUT to point to the directory 1341da177e4SLinus Torvalds# where the output files shall be placed. 1351da177e4SLinus Torvalds# export KBUILD_OUTPUT=dir/to/store/output/files/ 1361da177e4SLinus Torvalds# make 1371da177e4SLinus Torvalds# 1381da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment 1391da177e4SLinus Torvalds# variable. 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds# KBUILD_SRC is set on invocation of make in OBJ directory 1431da177e4SLinus Torvalds# KBUILD_SRC is not intended to be used by the regular user (for now) 1441da177e4SLinus Torvaldsifeq ($(KBUILD_SRC),) 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds# OK, Make called in directory where kernel src resides 1471da177e4SLinus Torvalds# Do we want to locate output files in a separate directory? 1481da177e4SLinus Torvaldsifeq ("$(origin O)", "command line") 1491da177e4SLinus Torvalds KBUILD_OUTPUT := $(O) 1501da177e4SLinus Torvaldsendif 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds# That's our default target when none is given on the command line 1534f193362SPaul SmithPHONY := _all 1541da177e4SLinus Torvalds_all: 1551da177e4SLinus Torvalds 1561cacc9abSSam Ravnborg# Cancel implicit rules on top Makefile 1571cacc9abSSam Ravnborg$(CURDIR)/Makefile Makefile: ; 1581cacc9abSSam Ravnborg 1591da177e4SLinus Torvaldsifneq ($(KBUILD_OUTPUT),) 1601da177e4SLinus Torvalds# Invoke a second make in the output directory, passing relevant variables 1611da177e4SLinus Torvalds# check that the output directory actually exists 1621da177e4SLinus Torvaldssaved-output := $(KBUILD_OUTPUT) 1631c9e70a5SMasahiro YamadaKBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ 1641c9e70a5SMasahiro Yamada && /bin/pwd) 1651da177e4SLinus Torvalds$(if $(KBUILD_OUTPUT),, \ 1661c9e70a5SMasahiro Yamada $(error failed to create output directory "$(saved-output)")) 1671da177e4SLinus Torvalds 1680b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make 1690b35786dSMilton Miller 1701cacc9abSSam Ravnborg$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 17116f89098SCharles Keepax @: 1720b35786dSMilton Miller 1730b35786dSMilton Millersub-make: FORCE 1741da177e4SLinus Torvalds $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 17523a45e2cSSam Ravnborg KBUILD_SRC=$(CURDIR) \ 1760b35786dSMilton Miller KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ 1770b35786dSMilton Miller $(filter-out _all sub-make,$(MAKECMDGOALS)) 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds# Leave processing to above invocation of make 1801da177e4SLinus Torvaldsskip-makefile := 1 1811da177e4SLinus Torvaldsendif # ifneq ($(KBUILD_OUTPUT),) 1821da177e4SLinus Torvaldsendif # ifeq ($(KBUILD_SRC),) 1831da177e4SLinus Torvalds 1841da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make 1851da177e4SLinus Torvaldsifeq ($(skip-makefile),) 1861da177e4SLinus Torvalds 187*7ff52571SMasahiro Yamada# Do not print "Entering directory ...", 188*7ff52571SMasahiro Yamada# but we want to display it when entering to the output directory 189*7ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames. 190*7ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory 191*7ff52571SMasahiro Yamada 1921da177e4SLinus Torvalds# If building an external module we do not care about the all: rule 1931da177e4SLinus Torvalds# but instead _all depend on modules 1944f193362SPaul SmithPHONY += all 1951da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 1961da177e4SLinus Torvalds_all: all 1971da177e4SLinus Torvaldselse 1981da177e4SLinus Torvalds_all: modules 1991da177e4SLinus Torvaldsendif 2001da177e4SLinus Torvalds 2019da0763bSMichal Marekifeq ($(KBUILD_SRC),) 2029da0763bSMichal Marek # building in the source tree 2039da0763bSMichal Marek srctree := . 2049da0763bSMichal Marekelse 2059da0763bSMichal Marek ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) 2069da0763bSMichal Marek # building in a subdirectory of the source tree 2079da0763bSMichal Marek srctree := .. 2089da0763bSMichal Marek else 2099da0763bSMichal Marek srctree := $(KBUILD_SRC) 2109da0763bSMichal Marek endif 2119da0763bSMichal Marekendif 2127e1c0477SMichal Marekobjtree := . 2131da177e4SLinus Torvaldssrc := $(srctree) 2141da177e4SLinus Torvaldsobj := $(objtree) 2151da177e4SLinus Torvalds 2160f558c33SMattia DongiliVPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 2171da177e4SLinus Torvalds 21811294235SAmerigo Wangexport srctree objtree VPATH 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds# SUBARCH tells the usermode build what the underlying arch is. That is set 2221da177e4SLinus Torvalds# first, and if a usermode build is happening, the "ARCH=um" on the command 2231da177e4SLinus Torvalds# line overrides the setting of ARCH below. If a native build is happening, 2241da177e4SLinus Torvalds# then ARCH is assigned, getting whatever value it gets normally, and 2251da177e4SLinus Torvalds# SUBARCH is subsequently ignored. 2261da177e4SLinus Torvalds 227ffee0de4SDavid WoodhouseSUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ 228ffee0de4SDavid Woodhouse -e s/sun4u/sparc64/ \ 2291da177e4SLinus Torvalds -e s/arm.*/arm/ -e s/sa110/arm/ \ 23039990b5eSLinus Torvalds -e s/s390x/s390/ -e s/parisc64/parisc/ \ 231236b1957SPaul Mundt -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 232f1b99392SWill Deacon -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ ) 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils 2351da177e4SLinus Torvalds# --------------------------------------------------------------------------- 2361da177e4SLinus Torvalds# 2371da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set 2381da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities). 2391da177e4SLinus Torvalds# ARCH can be set during invocation of make: 2401da177e4SLinus Torvalds# make ARCH=ia64 2411da177e4SLinus Torvalds# Another way is to have ARCH set in the environment. 2421da177e4SLinus Torvalds# The default ARCH is the host where make is executed. 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used 2451da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables 2461da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE). 2471da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line 2481da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux- 2491da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment. 25084336466SRoland McGrath# A third alternative is to store a setting in .config so that plain 25184336466SRoland McGrath# "make" in the configured kernel build directory always uses that. 2521da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables 2531da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 2542331d1a6SSam RavnborgARCH ?= $(SUBARCH) 25584336466SRoland McGrathCROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds# Architecture as present in compile.h 2581da177e4SLinus TorvaldsUTS_MACHINE := $(ARCH) 2596752ed90SThomas GleixnerSRCARCH := $(ARCH) 2601da177e4SLinus Torvalds 261d746d647SSam Ravnborg# Additional ARCH settings for x86 262d746d647SSam Ravnborgifeq ($(ARCH),i386) 263d746d647SSam Ravnborg SRCARCH := x86 264d746d647SSam Ravnborgendif 265d746d647SSam Ravnborgifeq ($(ARCH),x86_64) 266d746d647SSam Ravnborg SRCARCH := x86 267d746d647SSam Ravnborgendif 26874b469f2SSam Ravnborg 2695e538790SSam Ravnborg# Additional ARCH settings for sparc 270e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32) 271e69f58c0SNamhyung Kim SRCARCH := sparc 272e69f58c0SNamhyung Kimendif 273a439fe51SSam Ravnborgifeq ($(ARCH),sparc64) 2745e538790SSam Ravnborg SRCARCH := sparc 275a439fe51SSam Ravnborgendif 2762fb9b1bdSSam Ravnborg 2773cc000b5SPaul Mundt# Additional ARCH settings for sh 2783cc000b5SPaul Mundtifeq ($(ARCH),sh64) 2793cc000b5SPaul Mundt SRCARCH := sh 2803cc000b5SPaul Mundtendif 2813cc000b5SPaul Mundt 28218aecc2bSChris Metcalf# Additional ARCH settings for tile 2836738d321SChris Metcalfifeq ($(ARCH),tilepro) 2846738d321SChris Metcalf SRCARCH := tile 2856738d321SChris Metcalfendif 28618aecc2bSChris Metcalfifeq ($(ARCH),tilegx) 28718aecc2bSChris Metcalf SRCARCH := tile 28818aecc2bSChris Metcalfendif 28918aecc2bSChris Metcalf 2905e538790SSam Ravnborg# Where to locate arch specific headers 2915e538790SSam Ravnborghdr-arch := $(SRCARCH) 2925e538790SSam Ravnborg 29314cdd3c4SRoman ZippelKCONFIG_CONFIG ?= .config 29441263fc6SBen Gardinerexport KCONFIG_CONFIG 29514cdd3c4SRoman Zippel 2961da177e4SLinus Torvalds# SHELL used by kbuild 2971da177e4SLinus TorvaldsCONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 2981da177e4SLinus Torvalds else if [ -x /bin/bash ]; then echo /bin/bash; \ 2991da177e4SLinus Torvalds else echo sh; fi ; fi) 3001da177e4SLinus Torvalds 3011da177e4SLinus TorvaldsHOSTCC = gcc 3021da177e4SLinus TorvaldsHOSTCXX = g++ 30325583d4bSJosh TriplettHOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer 3041da177e4SLinus TorvaldsHOSTCXXFLAGS = -O2 3051da177e4SLinus Torvalds 30661163efaSBehan Websterifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1) 30761163efaSBehan WebsterHOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \ 30861163efaSBehan Webster -Wno-missing-field-initializers -fno-delete-null-pointer-checks 30961163efaSBehan Websterendif 31061163efaSBehan Webster 3111da177e4SLinus Torvalds# Decide whether to build built-in, modular, or both. 3121da177e4SLinus Torvalds# Normally, just do built-in. 3131da177e4SLinus Torvalds 3141da177e4SLinus TorvaldsKBUILD_MODULES := 3151da177e4SLinus TorvaldsKBUILD_BUILTIN := 1 3161da177e4SLinus Torvalds 3171da177e4SLinus Torvalds# If we have only "make modules", don't compile built-in objects. 3181da177e4SLinus Torvalds# When we're building modules with modversions, we need to consider 3191da177e4SLinus Torvalds# the built-in objects during the descend as well, in order to 3201da177e4SLinus Torvalds# make sure the checksums are up to date before we record them. 3211da177e4SLinus Torvalds 3221da177e4SLinus Torvaldsifeq ($(MAKECMDGOALS),modules) 3231da177e4SLinus Torvalds KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 3241da177e4SLinus Torvaldsendif 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds# If we have "make <whatever> modules", compile modules 3271da177e4SLinus Torvalds# in addition to whatever we do anyway. 3281da177e4SLinus Torvalds# Just "make" or "make all" shall build modules as well 3291da177e4SLinus Torvalds 3301da177e4SLinus Torvaldsifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 3311da177e4SLinus Torvalds KBUILD_MODULES := 1 3321da177e4SLinus Torvaldsendif 3331da177e4SLinus Torvalds 3341da177e4SLinus Torvaldsifeq ($(MAKECMDGOALS),) 3351da177e4SLinus Torvalds KBUILD_MODULES := 1 3361da177e4SLinus Torvaldsendif 3371da177e4SLinus Torvalds 338e579d351SSam Ravnborgexport KBUILD_MODULES KBUILD_BUILTIN 3391da177e4SLinus Torvaldsexport KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 3401da177e4SLinus Torvalds 34161163efaSBehan Websterifneq ($(CC),) 34261163efaSBehan Websterifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1) 34361163efaSBehan WebsterCOMPILER := clang 34461163efaSBehan Websterelse 34561163efaSBehan WebsterCOMPILER := gcc 34661163efaSBehan Websterendif 34761163efaSBehan Websterexport COMPILER 34861163efaSBehan Websterendif 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds# Look for make include files relative to root of kernel src 3511da177e4SLinus TorvaldsMAKEFLAGS += --include-dir=$(srctree) 3521da177e4SLinus Torvalds 3531cacc9abSSam Ravnborg# We need some generic definitions (do not try to remake the file). 3541cacc9abSSam Ravnborg$(srctree)/scripts/Kbuild.include: ; 3552a691470SSam Ravnborginclude $(srctree)/scripts/Kbuild.include 3568ec4b4ffSSam Ravnborg 3571da177e4SLinus Torvalds# Make variables (CC, etc...) 3581da177e4SLinus TorvaldsAS = $(CROSS_COMPILE)as 3591da177e4SLinus TorvaldsLD = $(CROSS_COMPILE)ld 3601da177e4SLinus TorvaldsCC = $(CROSS_COMPILE)gcc 3611da177e4SLinus TorvaldsCPP = $(CC) -E 3621da177e4SLinus TorvaldsAR = $(CROSS_COMPILE)ar 3631da177e4SLinus TorvaldsNM = $(CROSS_COMPILE)nm 3641da177e4SLinus TorvaldsSTRIP = $(CROSS_COMPILE)strip 3651da177e4SLinus TorvaldsOBJCOPY = $(CROSS_COMPILE)objcopy 3661da177e4SLinus TorvaldsOBJDUMP = $(CROSS_COMPILE)objdump 3671da177e4SLinus TorvaldsAWK = awk 3681da177e4SLinus TorvaldsGENKSYMS = scripts/genksyms/genksyms 369caa27b66SSam RavnborgINSTALLKERNEL := installkernel 3701da177e4SLinus TorvaldsDEPMOD = /sbin/depmod 3711da177e4SLinus TorvaldsPERL = perl 372011bf125SMasahiro YamadaPYTHON = python 3731da177e4SLinus TorvaldsCHECK = sparse 3741da177e4SLinus Torvalds 37580a7d1d9SHannes EderCHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 37680a7d1d9SHannes Eder -Wbitwise -Wno-return-void $(CF) 3776588169dSSam RavnborgCFLAGS_MODULE = 3786588169dSSam RavnborgAFLAGS_MODULE = 3796588169dSSam RavnborgLDFLAGS_MODULE = 3801da177e4SLinus TorvaldsCFLAGS_KERNEL = 3811da177e4SLinus TorvaldsAFLAGS_KERNEL = 3822521f2c2SPeter OberparleiterCFLAGS_GCOV = -fprofile-arcs -ftest-coverage 3831da177e4SLinus Torvalds 3841da177e4SLinus Torvalds 385abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only. 386abbf1590SDavid HowellsUSERINCLUDE := \ 387abbf1590SDavid Howells -I$(srctree)/arch/$(hdr-arch)/include/uapi \ 388abbf1590SDavid Howells -Iarch/$(hdr-arch)/include/generated/uapi \ 389abbf1590SDavid Howells -I$(srctree)/include/uapi \ 390abbf1590SDavid Howells -Iinclude/generated/uapi \ 391abbf1590SDavid Howells -include $(srctree)/include/linux/kconfig.h 392abbf1590SDavid Howells 3931da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory. 3941da177e4SLinus Torvalds# Needed to be compatible with the O= option 395abbf1590SDavid HowellsLINUXINCLUDE := \ 396abbf1590SDavid Howells -I$(srctree)/arch/$(hdr-arch)/include \ 397abbf1590SDavid Howells -Iarch/$(hdr-arch)/include/generated \ 39896f13045SSam Ravnborg $(if $(KBUILD_SRC), -I$(srctree)/include) \ 399abbf1590SDavid Howells -Iinclude \ 400abbf1590SDavid Howells $(USERINCLUDE) 4011da177e4SLinus Torvalds 402d8672b40SSam RavnborgKBUILD_CPPFLAGS := -D__KERNEL__ 4031da177e4SLinus Torvalds 404a0f97e06SSam RavnborgKBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 40594bed2a9SDave Jones -fno-strict-aliasing -fno-common \ 406a8735821SFloris Kraak -Werror-implicit-function-declaration \ 407a1c48bb1SGeert Uytterhoeven -Wno-format-security 408a1c48bb1SGeert Uytterhoeven 40980c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL := 41080c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL := 411222d394dSSam RavnborgKBUILD_AFLAGS := -D__ASSEMBLY__ 4126588169dSSam RavnborgKBUILD_AFLAGS_MODULE := -DMODULE 4136588169dSSam RavnborgKBUILD_CFLAGS_MODULE := -DMODULE 4146588169dSSam RavnborgKBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 4151da177e4SLinus Torvalds 416f1d28fb0SRoman Zippel# Read KERNELRELEASE from include/config/kernel.release (if it exists) 417f1d28fb0SRoman ZippelKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 418cacd54efSMichal MarekKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 419cb58455cSSam Ravnborg 420070b98bfSSam Ravnborgexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 42180ef88d6SSam Ravnborgexport ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 422caa27b66SSam Ravnborgexport CPP AR NM STRIP OBJCOPY OBJDUMP 423011bf125SMasahiro Yamadaexport MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE 424070b98bfSSam Ravnborgexport HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 4251da177e4SLinus Torvalds 42606c5040cSSam Ravnborgexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 4272521f2c2SPeter Oberparleiterexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV 428222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 4296588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 43080c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 43140df759eSMichal Marekexport KBUILD_ARFLAGS 4321da177e4SLinus Torvalds 4331da177e4SLinus Torvalds# When compiling out-of-tree modules, put MODVERDIR in the module 4341da177e4SLinus Torvalds# tree rather than in the kernel tree. The kernel tree might 4351da177e4SLinus Torvalds# even be read-only. 4361da177e4SLinus Torvaldsexport MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 4371da177e4SLinus Torvalds 4381da177e4SLinus Torvalds# Files to ignore in find ... statements 4391da177e4SLinus Torvalds 440ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 441ae63b2d7SPrarit Bhargava -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 442ae63b2d7SPrarit Bhargava -prune -o 443450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 444450c6076SJesper Juhl --exclude CVS --exclude .pc --exclude .hg --exclude .git 4451da177e4SLinus Torvalds 4461da177e4SLinus Torvalds# =========================================================================== 4471da177e4SLinus Torvalds# Rules shared between *config targets and build targets 4481da177e4SLinus Torvalds 4491da177e4SLinus Torvalds# Basic helpers built in scripts/ 4504f193362SPaul SmithPHONY += scripts_basic 4511da177e4SLinus Torvaldsscripts_basic: 4521da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/basic 453638adb05SSteven Rostedt $(Q)rm -f .tmp_quiet_recordmcount 4541da177e4SLinus Torvalds 455cd05e6bdSJan Beulich# To avoid any implicit rule to kick in, define an empty command. 456cd05e6bdSJan Beulichscripts/basic/%: scripts_basic ; 457cd05e6bdSJan Beulich 4584f193362SPaul SmithPHONY += outputmakefile 459fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a 460fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the 461fd5f0cd6SJan Beulich# output directory. 4621da177e4SLinus Torvaldsoutputmakefile: 463fd5f0cd6SJan Beulichifneq ($(KBUILD_SRC),) 46492979997SAndi Kleen $(Q)ln -fsn $(srctree) source 465fd5f0cd6SJan Beulich $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 466fd5f0cd6SJan Beulich $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 467fd5f0cd6SJan Beulichendif 4681da177e4SLinus Torvalds 469d8ecc5cdSSam Ravnborg# Support for using generic headers in asm-generic 470d8ecc5cdSSam RavnborgPHONY += asm-generic 471d8ecc5cdSSam Ravnborgasm-generic: 472d8ecc5cdSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 4733c5994c8SCatalin Marinas src=asm obj=arch/$(SRCARCH)/include/generated/asm 4743c5994c8SCatalin Marinas $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 4753c5994c8SCatalin Marinas src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm 476d8ecc5cdSSam Ravnborg 4771da177e4SLinus Torvalds# To make sure we do not include .config for any of the *config targets 4781da177e4SLinus Torvalds# catch them early, and hand them over to scripts/kconfig/Makefile 4791da177e4SLinus Torvalds# It is allowed to specify more targets when calling make, including 4801da177e4SLinus Torvalds# mixing *config targets and build targets. 4811da177e4SLinus Torvalds# For example 'make oldconfig all'. 4821da177e4SLinus Torvalds# Detect when mixed targets is specified, and make a second invocation 4831da177e4SLinus Torvalds# of make so .config is not included in this case either (for *config). 4841da177e4SLinus Torvalds 48510b63956SDavid Howellsversion_h := include/generated/uapi/linux/version.h 486d183e6f5SDavid Howells 4873eb3c740SRoman Zippelno-dot-config-targets := clean mrproper distclean \ 488f4ed1009SJianbin Kang cscope gtags TAGS tags help %docs check% coccicheck \ 489d183e6f5SDavid Howells $(version_h) headers_% archheaders archscripts \ 4904aed2fd8SLinus Torvalds kernelversion %src-pkg 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvaldsconfig-targets := 0 4931da177e4SLinus Torvaldsmixed-targets := 0 4941da177e4SLinus Torvaldsdot-config := 1 4951da177e4SLinus Torvalds 4961da177e4SLinus Torvaldsifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 4971da177e4SLinus Torvalds ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 4981da177e4SLinus Torvalds dot-config := 0 4991da177e4SLinus Torvalds endif 5001da177e4SLinus Torvaldsendif 5011da177e4SLinus Torvalds 5021da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 5031da177e4SLinus Torvalds ifneq ($(filter config %config,$(MAKECMDGOALS)),) 5041da177e4SLinus Torvalds config-targets := 1 5051da177e4SLinus Torvalds ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 5061da177e4SLinus Torvalds mixed-targets := 1 5071da177e4SLinus Torvalds endif 5081da177e4SLinus Torvalds endif 5091da177e4SLinus Torvaldsendif 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvaldsifeq ($(mixed-targets),1) 5121da177e4SLinus Torvalds# =========================================================================== 5131da177e4SLinus Torvalds# We're called with mixed targets (*config and build targets). 5141da177e4SLinus Torvalds# Handle them one by one. 5151da177e4SLinus Torvalds 5169319f453SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one 5179319f453SMasahiro Yamada 5189319f453SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 5199319f453SMasahiro Yamada @: 5209319f453SMasahiro Yamada 5219319f453SMasahiro Yamada__build_one_by_one: 5229319f453SMasahiro Yamada $(Q)set -e; \ 5239319f453SMasahiro Yamada for i in $(MAKECMDGOALS); do \ 5249319f453SMasahiro Yamada $(MAKE) -f $(srctree)/Makefile $$i; \ 5259319f453SMasahiro Yamada done 5261da177e4SLinus Torvalds 5271da177e4SLinus Torvaldselse 5281da177e4SLinus Torvaldsifeq ($(config-targets),1) 5291da177e4SLinus Torvalds# =========================================================================== 5301da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend 5311da177e4SLinus Torvalds# in scripts/kconfig to make the *config target 5321da177e4SLinus Torvalds 5331da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 5341da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration 5351da177e4SLinus Torvalds# used for 'make defconfig' 53674b469f2SSam Ravnborginclude $(srctree)/arch/$(SRCARCH)/Makefile 53761bee204SAl Viroexport KBUILD_DEFCONFIG KBUILD_KCONFIG 5381da177e4SLinus Torvalds 53931110ebbSSam Ravnborgconfig: scripts_basic outputmakefile FORCE 54031110ebbSSam Ravnborg $(Q)$(MAKE) $(build)=scripts/kconfig $@ 54131110ebbSSam Ravnborg 54231110ebbSSam Ravnborg%config: scripts_basic outputmakefile FORCE 5431da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=scripts/kconfig $@ 5441da177e4SLinus Torvalds 5451da177e4SLinus Torvaldselse 5461da177e4SLinus Torvalds# =========================================================================== 5471da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean 5481da177e4SLinus Torvalds# targets and others. In general all targets except *config targets. 5491da177e4SLinus Torvalds 5501da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 5511da177e4SLinus Torvalds# Additional helpers built in scripts/ 5521da177e4SLinus Torvalds# Carefully list dependencies so we do not try to build scripts twice 553070b98bfSSam Ravnborg# in parallel 5544f193362SPaul SmithPHONY += scripts 555a54292f5SAndreas Schwabscripts: scripts_basic include/config/auto.conf include/config/tristate.conf \ 556a54292f5SAndreas Schwab asm-generic 5571da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=$(@) 5581da177e4SLinus Torvalds 5591da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit 5601da177e4SLinus Torvaldsinit-y := init/ 5614d2acfbfSDavid Woodhousedrivers-y := drivers/ sound/ firmware/ 5621da177e4SLinus Torvaldsnet-y := net/ 5631da177e4SLinus Torvaldslibs-y := lib/ 5641da177e4SLinus Torvaldscore-y := usr/ 5651da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvaldsifeq ($(dot-config),1) 5689ee4e336SSam Ravnborg# Read in config 5699ee4e336SSam Ravnborg-include include/config/auto.conf 5701da177e4SLinus Torvalds 5719ee4e336SSam Ravnborgifeq ($(KBUILD_EXTMOD),) 5721da177e4SLinus Torvalds# Read in dependencies to all Kconfig* files, make sure to run 5731da177e4SLinus Torvalds# oldconfig if changes are detected. 574c955ccafSRoman Zippel-include include/config/auto.conf.cmd 5751da177e4SLinus Torvalds 5761da177e4SLinus Torvalds# To avoid any implicit rule to kick in, define an empty command 57714cdd3c4SRoman Zippel$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 5781da177e4SLinus Torvalds 579c955ccafSRoman Zippel# If .config is newer than include/config/auto.conf, someone tinkered 580752625cfSSam Ravnborg# with it and forgot to run make oldconfig. 581070b98bfSSam Ravnborg# if auto.conf.cmd is missing then we are probably in a cleaned tree so 582752625cfSSam Ravnborg# we execute the config step to be sure to catch updated Kconfig files 583bc081dd6SMichal Marekinclude/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 5841da177e4SLinus Torvalds $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 5851da177e4SLinus Torvaldselse 586264a2683SSam Ravnborg# external modules needs include/generated/autoconf.h and include/config/auto.conf 5879ee4e336SSam Ravnborg# but do not care if they are up-to-date. Use auto.conf to trigger the test 5889ee4e336SSam RavnborgPHONY += include/config/auto.conf 5899ee4e336SSam Ravnborg 5909ee4e336SSam Ravnborginclude/config/auto.conf: 591264a2683SSam Ravnborg $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 5925369f550SMichal Marek echo >&2; \ 5935369f550SMichal Marek echo >&2 " ERROR: Kernel configuration is invalid."; \ 5945369f550SMichal Marek echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 5955369f550SMichal Marek echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 5965369f550SMichal Marek echo >&2 ; \ 5979ee4e336SSam Ravnborg /bin/false) 5989ee4e336SSam Ravnborg 5999ee4e336SSam Ravnborgendif # KBUILD_EXTMOD 600c955ccafSRoman Zippel 6011da177e4SLinus Torvaldselse 6021da177e4SLinus Torvalds# Dummy target needed, because used as prerequisite 603c955ccafSRoman Zippelinclude/config/auto.conf: ; 6049ee4e336SSam Ravnborgendif # $(dot-config) 6051da177e4SLinus Torvalds 6061da177e4SLinus Torvalds# The all: target is the default when no target is given on the 6071da177e4SLinus Torvalds# command line. 6081da177e4SLinus Torvalds# This allow a user to issue only 'make' to build a kernel including modules 609c8447161SMichal Marek# Defaults to vmlinux, but the arch makefile usually adds further targets 6101da177e4SLinus Torvaldsall: vmlinux 6111da177e4SLinus Torvalds 612a1c48bb1SGeert Uytterhoeveninclude $(srctree)/arch/$(SRCARCH)/Makefile 613a1c48bb1SGeert Uytterhoeven 614a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 615a1c48bb1SGeert Uytterhoeven 6161da177e4SLinus Torvaldsifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 617e74fc973SArnd BergmannKBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,) 6181da177e4SLinus Torvaldselse 619a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2 6201da177e4SLinus Torvaldsendif 6211da177e4SLinus Torvalds 62269102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one 62369102311SJiri KosinaKBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 62469102311SJiri Kosina 6251873e870SAndi Kleenifdef CONFIG_READABLE_ASM 6261873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read. 6271873e870SAndi Kleen# reorder blocks reorders the control in the function 6281873e870SAndi Kleen# ipa clone creates specialized cloned functions 6291873e870SAndi Kleen# partial inlining inlines only parts of functions 6301873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 6311873e870SAndi Kleen $(call cc-option,-fno-ipa-cp-clone,) \ 6321873e870SAndi Kleen $(call cc-option,-fno-partial-inlining) 6331873e870SAndi Kleenendif 6341873e870SAndi Kleen 63508f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0) 63635bb5b1eSAndi KleenKBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 63735bb5b1eSAndi Kleenendif 63835bb5b1eSAndi Kleen 63919952a92SKees Cook# Handle stack protector mode. 6401332429bSKees Cook# 6411332429bSKees Cook# Since kbuild can potentially perform two passes (first with the old 6421332429bSKees Cook# .config values and then with updated .config values), we cannot error out 6431332429bSKees Cook# if a desired compiler option is unsupported. If we were to error, kbuild 6441332429bSKees Cook# could never get to the second pass and actually notice that we changed 6451332429bSKees Cook# the option to something that was supported. 6461332429bSKees Cook# 6471332429bSKees Cook# Additionally, we don't want to fallback and/or silently change which compiler 6481332429bSKees Cook# flags will be used, since that leads to producing kernels with different 6491332429bSKees Cook# security feature characteristics depending on the compiler used. ("But I 6501332429bSKees Cook# selected CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!") 6511332429bSKees Cook# 6521332429bSKees Cook# The middle ground is to warn here so that the failed option is obvious, but 6531332429bSKees Cook# to let the build fail with bad compiler flags so that we can't produce a 6541332429bSKees Cook# kernel when there is a CONFIG and compiler mismatch. 6551332429bSKees Cook# 6568779657dSKees Cookifdef CONFIG_CC_STACKPROTECTOR_REGULAR 65719952a92SKees Cook stackp-flag := -fstack-protector 65819952a92SKees Cook ifeq ($(call cc-option, $(stackp-flag)),) 6596c15b327SJan Beulich $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \ 66027b2a49aSFathi Boudra -fstack-protector not supported by compiler) 6615d707e9cSTejun Heo endif 6626c15b327SJan Beulichelse 6636c15b327SJan Beulichifdef CONFIG_CC_STACKPROTECTOR_STRONG 6648779657dSKees Cook stackp-flag := -fstack-protector-strong 6658779657dSKees Cook ifeq ($(call cc-option, $(stackp-flag)),) 6668779657dSKees Cook $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \ 6678779657dSKees Cook -fstack-protector-strong not supported by compiler) 6688779657dSKees Cook endif 66919952a92SKees Cookelse 67019952a92SKees Cook # Force off for distro compilers that enable stack protector by default. 67119952a92SKees Cook stackp-flag := $(call cc-option, -fno-stack-protector) 67219952a92SKees Cookendif 6736c15b327SJan Beulichendif 67419952a92SKees CookKBUILD_CFLAGS += $(stackp-flag) 675e06b8b98SSam Ravnborg 67661163efaSBehan Websterifeq ($(COMPILER),clang) 67761163efaSBehan WebsterKBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) 67861163efaSBehan WebsterKBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,) 67961163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, unused-variable) 68061163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) 68161163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, gnu) 68261163efaSBehan Webster# Quiet clang warning: comparison of unsigned expression < 0 is always false 68361163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) 68461163efaSBehan Webster# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 68561163efaSBehan Webster# source of a reference will be _MergedGlobals and not on of the whitelisted names. 68661163efaSBehan Webster# See modpost pattern 2 68761163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) 68826ea6bb1SBehan WebsterKBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) 68961163efaSBehan Websterelse 69061163efaSBehan Webster 691af0e5d56SDave Jones# This warning generated too much noise in a regular build. 692af0e5d56SDave Jones# Use make W=1 to enable this warning (see scripts/Makefile.build) 6938417da6fSMichal MarekKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 69461163efaSBehan Websterendif 695af0e5d56SDave Jones 6961da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER 697a0f97e06SSam RavnborgKBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 6981da177e4SLinus Torvaldselse 6997e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame 7007e9501fdSRabin Vincent# pointers. For those, we don't have FUNCTION_TRACER automatically 7017e9501fdSRabin Vincent# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 7027e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use 7037e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER. 7047e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER 705a0f97e06SSam RavnborgKBUILD_CFLAGS += -fomit-frame-pointer 7061da177e4SLinus Torvaldsendif 7077e9501fdSRabin Vincentendif 7081da177e4SLinus Torvalds 7092062afb4SLinus TorvaldsKBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) 7102062afb4SLinus Torvalds 7111da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO 712866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT 713866ced95SAndi KleenKBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) 714866ced95SAndi Kleenelse 715a0f97e06SSam RavnborgKBUILD_CFLAGS += -g 716866ced95SAndi Kleenendif 7172288328cSBehan WebsterKBUILD_AFLAGS += -Wa,-gdwarf-2 7181da177e4SLinus Torvaldsendif 719bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4 720bfaf2dd3SAndi KleenKBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) 721bfaf2dd3SAndi Kleenendif 7221da177e4SLinus Torvalds 723d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED 724e82c4bb8SAndi KleenKBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 725e82c4bb8SAndi Kleen $(call cc-option,-fno-var-tracking) 726d6f4ceb7SAndi Kleenendif 727d6f4ceb7SAndi Kleen 728606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER 729a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY 730a2546faeSSteven RostedtCC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) 731a2546faeSSteven Rostedtendif 732a2546faeSSteven RostedtKBUILD_CFLAGS += -pg $(CC_USING_FENTRY) 733a2546faeSSteven RostedtKBUILD_AFLAGS += $(CC_USING_FENTRY) 73472441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE 735cf4db259SSteven Rostedt ifdef CONFIG_HAVE_C_RECORDMCOUNT 73672441cb1SSteven Rostedt BUILD_C_RECORDMCOUNT := y 73772441cb1SSteven Rostedt export BUILD_C_RECORDMCOUNT 73872441cb1SSteven Rostedt endif 73972441cb1SSteven Rostedtendif 74016444a8aSArnaldo Carvalho de Meloendif 74116444a8aSArnaldo Carvalho de Melo 74291341d4bSSam Ravnborg# We trigger additional mismatches with less inlining 74391341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH 74491341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 74591341d4bSSam Ravnborgendif 74691341d4bSSam Ravnborg 747e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included 748e8f5bdb0SRik van RielNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 749e8e69931SSam RavnborgCHECKFLAGS += $(NOSTDINC_FLAGS) 750e8e69931SSam Ravnborg 7511da177e4SLinus Torvalds# warn about C99 declaration after statement 752a0f97e06SSam RavnborgKBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 7531da177e4SLinus Torvalds 754070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0 7558417da6fSMichal MarekKBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) 7561da177e4SLinus Torvalds 757fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers 758a137802eSLinus TorvaldsKBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 759d0115552SLinus Torvalds 7608f7f5c9fSAndi Kleen# conserve stack if available 7618f7f5c9fSAndi KleenKBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 7628f7f5c9fSAndi Kleen 76380970472SSergei Trofimovich# disallow errors like 'EXPORT_GPL(foo);' with missing header 76480970472SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) 76580970472SSergei Trofimovich 76680970472SSergei Trofimovich# require functions to have arguments in prototypes, not empty 'int foo()' 76780970472SSergei TrofimovichKBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) 76880970472SSergei Trofimovich 769fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic 770fe7c36c7SJosh TriplettKBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 771fe7c36c7SJosh Triplett 77240df759eSMichal Marek# use the deterministic mode of AR if available 77340df759eSMichal MarekKBUILD_ARFLAGS := $(call ar-option,D) 77440df759eSMichal Marek 775bf5438fcSJason Baron# check for 'asm goto' 776bf5438fcSJason Baronifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) 777bf5438fcSJason Baron KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO 778bf5438fcSJason Baronendif 779bf5438fcSJason Baron 780a86fe353SMasahiro Yamadainclude $(srctree)/scripts/Makefile.extrawarn 781a86fe353SMasahiro Yamada 78206c5040cSSam Ravnborg# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 78369ee0b35SSam RavnborgKBUILD_CPPFLAGS += $(KCPPFLAGS) 78469ee0b35SSam RavnborgKBUILD_AFLAGS += $(KAFLAGS) 78569ee0b35SSam RavnborgKBUILD_CFLAGS += $(KCFLAGS) 78652bcc330SSam Ravnborg 78718991197SRoland McGrath# Use --build-id when available. 78818991197SRoland McGrathLDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 789f86fd306SSam Ravnborg $(call cc-ldoption, -Wl$(comma)--build-id,)) 7906588169dSSam RavnborgKBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 79118991197SRoland McGrathLDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 79218991197SRoland McGrath 7935d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y) 794d79a2719SAndi KleenLDFLAGS_vmlinux += $(call ld-option, -X,) 7955d7d18f5SDavid Howellsendif 7965d7d18f5SDavid Howells 7971da177e4SLinus Torvalds# Default kernel image to build when no specific target is given. 7981da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or 7991da177e4SLinus Torvalds# set in the environment 8001da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over 8011da177e4SLinus Torvalds# this default value 8021da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux 8031da177e4SLinus Torvalds 8041da177e4SLinus Torvalds# 8051da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map 8061da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values 8071da177e4SLinus Torvaldsexport INSTALL_PATH ?= /boot 8081da177e4SLinus Torvalds 8091da177e4SLinus Torvalds# 810f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 811f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 812f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path 813f4d4ffc0SJason Cooper# 814f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 815f4d4ffc0SJason Cooper 816f4d4ffc0SJason Cooper# 8171da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 8181da177e4SLinus Torvalds# relocations required by build roots. This is not defined in the 819070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed. 8201da177e4SLinus Torvalds# 8211da177e4SLinus Torvalds 822df9df036SSam RavnborgMODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 8231da177e4SLinus Torvaldsexport MODLIB 8241da177e4SLinus Torvalds 825ac031f26STheodore Ts'o# 8262ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be 8272ea03891SSam Ravnborg# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 8282ea03891SSam Ravnborg# the default option --strip-debug will be used. Otherwise, 829177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command. 8302ea03891SSam Ravnborg 831ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP 832ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1) 8332ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug 834ac031f26STheodore Ts'oelse 8352ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 836ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1 837ac031f26STheodore Ts'oelse 8382ea03891SSam Ravnborgmod_strip_cmd = true 839ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP 840ac031f26STheodore Ts'oexport mod_strip_cmd 841ac031f26STheodore Ts'o 8421bf49dd4SP J P# Select initial ramdisk compression format, default is gzip(1). 8431bf49dd4SP J P# This shall be used by the dracut(8) tool while creating an initramfs image. 8441bf49dd4SP J P# 8457ac18156SJan BeulichINITRD_COMPRESS-y := gzip 8467ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 8477ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma 8487ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_XZ) := xz 8497ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo 8507ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 851b7000adeSLinus Torvalds# do not export INITRD_COMPRESS, since we didn't actually 852b7000adeSLinus Torvalds# choose a sane default compression above. 853b7000adeSLinus Torvalds# export INITRD_COMPRESS := $(INITRD_COMPRESS-y) 8541da177e4SLinus Torvalds 855d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL 856e2a666d5SRusty RussellMODSECKEY = ./signing_key.priv 857e2a666d5SRusty RussellMODPUBKEY = ./signing_key.x509 858e2a666d5SRusty Russellexport MODPUBKEY 8594bc9410cSMichal Marekmod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY) 860e2a666d5SRusty Russellelse 861e2a666d5SRusty Russellmod_sign_cmd = true 862e2a666d5SRusty Russellendif 863e2a666d5SRusty Russellexport mod_sign_cmd 864e2a666d5SRusty Russell 865e2a666d5SRusty Russell 8661da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),) 8673a65dfe8SJens Axboecore-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 8681da177e4SLinus Torvalds 8691da177e4SLinus Torvaldsvmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 8701da177e4SLinus Torvalds $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 8711da177e4SLinus Torvalds $(net-y) $(net-m) $(libs-y) $(libs-m))) 8721da177e4SLinus Torvalds 8731da177e4SLinus Torvaldsvmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 8741da177e4SLinus Torvalds $(init-n) $(init-) \ 8751da177e4SLinus Torvalds $(core-n) $(core-) $(drivers-n) $(drivers-) \ 8761da177e4SLinus Torvalds $(net-n) $(net-) $(libs-n) $(libs-)))) 8771da177e4SLinus Torvalds 8781da177e4SLinus Torvaldsinit-y := $(patsubst %/, %/built-in.o, $(init-y)) 8791da177e4SLinus Torvaldscore-y := $(patsubst %/, %/built-in.o, $(core-y)) 8801da177e4SLinus Torvaldsdrivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 8811da177e4SLinus Torvaldsnet-y := $(patsubst %/, %/built-in.o, $(net-y)) 8821da177e4SLinus Torvaldslibs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 8831da177e4SLinus Torvaldslibs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 8841da177e4SLinus Torvaldslibs-y := $(libs-y1) $(libs-y2) 8851da177e4SLinus Torvalds 8861f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh) 88795698570SSam Ravnborgexport KBUILD_VMLINUX_INIT := $(head-y) $(init-y) 88895698570SSam Ravnborgexport KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) 88995698570SSam Ravnborgexport KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 8901f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux 8916615d6c3SMichal Marek# used by scripts/pacmage/Makefile 8926615d6c3SMichal Marekexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt) 8931da177e4SLinus Torvalds 8941f2bfbd0SSam Ravnborgvmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) 8951da177e4SLinus Torvalds 8961f2bfbd0SSam Ravnborg# Final link of vmlinux 8971f2bfbd0SSam Ravnborg cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) 8981f2bfbd0SSam Ravnborgquiet_cmd_link-vmlinux = LINK $@ 8991da177e4SLinus Torvalds 9001f2bfbd0SSam Ravnborg# Include targets which we want to 9011f2bfbd0SSam Ravnborg# execute if the rest of the kernel build went well. 9021f2bfbd0SSam Ravnborgvmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE 9030f836e5fSDavid Woodhouseifdef CONFIG_HEADERS_CHECK 9040e7af8d0SDavid Woodhouse $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 9050f836e5fSDavid Woodhouseendif 906267c4025SMathieu Desnoyersifdef CONFIG_SAMPLES 907267c4025SMathieu Desnoyers $(Q)$(MAKE) $(build)=samples 908267c4025SMathieu Desnoyersendif 9093794f3e8SRandy Dunlapifdef CONFIG_BUILD_DOCSRC 9103794f3e8SRandy Dunlap $(Q)$(MAKE) $(build)=Documentation 9113794f3e8SRandy Dunlapendif 9121f2bfbd0SSam Ravnborg +$(call if_changed,link-vmlinux) 913741f98feSSam Ravnborg 9141da177e4SLinus Torvalds# The actual objects are generated when descending, 9151da177e4SLinus Torvalds# make sure no implicit rule kicks in 9161f2bfbd0SSam Ravnborg$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 9171da177e4SLinus Torvalds 9181da177e4SLinus Torvalds# Handle descending into subdirectories listed in $(vmlinux-dirs) 9191da177e4SLinus Torvalds# Preset locale variables to speed up the build process. Limit locale 9201da177e4SLinus Torvalds# tweaks to this spot to avoid wrong language settings when running 9211da177e4SLinus Torvalds# make menuconfig etc. 9221da177e4SLinus Torvalds# Error messages still appears in the original language 9231da177e4SLinus Torvalds 9244f193362SPaul SmithPHONY += $(vmlinux-dirs) 9255bb78269SSam Ravnborg$(vmlinux-dirs): prepare scripts 9261da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=$@ 9271da177e4SLinus Torvalds 9280d0e7718SMichal Marekdefine filechk_kernel.release 9290d0e7718SMichal Marek echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 9300d0e7718SMichal Marekendef 9310d0e7718SMichal Marek 93283a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release 933f1d28fb0SRoman Zippelinclude/config/kernel.release: include/config/auto.conf FORCE 9340d0e7718SMichal Marek $(call filechk,kernel.release) 935cb58455cSSam Ravnborg 936cb58455cSSam Ravnborg 9371da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel 9385bb78269SSam Ravnborg# or the modules are listed in "prepare". 9395bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1. 9405bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink, 9415bb78269SSam Ravnborg# version.h and scripts_basic is processed / created. 9421da177e4SLinus Torvalds 9435bb78269SSam Ravnborg# Listed in dependency order 9444f193362SPaul SmithPHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 9455bb78269SSam Ravnborg 94686feeaa8SSam Ravnborg# prepare3 is used to check if we are building in a separate output directory, 9471da177e4SLinus Torvalds# and if so do: 9481da177e4SLinus Torvalds# 1) Check that make has not been executed in the kernel src $(srctree) 949f1d28fb0SRoman Zippelprepare3: include/config/kernel.release 9501da177e4SLinus Torvaldsifneq ($(KBUILD_SRC),) 951fd54f502SMike Frysinger @$(kecho) ' Using $(srctree) as source for kernel' 952c955ccafSRoman Zippel $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 9535369f550SMichal Marek echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ 9545369f550SMichal Marek echo >&2 " in the '$(srctree)' directory.";\ 9551da177e4SLinus Torvalds /bin/false; \ 9561da177e4SLinus Torvalds fi; 9571da177e4SLinus Torvaldsendif 9581da177e4SLinus Torvalds 95986feeaa8SSam Ravnborg# prepare2 creates a makefile if using a separate output directory 960d8ecc5cdSSam Ravnborgprepare2: prepare3 outputmakefile asm-generic 9611da177e4SLinus Torvalds 962d183e6f5SDavid Howellsprepare1: prepare2 $(version_h) include/generated/utsrelease.h \ 963f7f16b77SSam Ravnborg include/config/auto.conf 9647bb9d092SSam Ravnborg $(cmd_crmodverdir) 9651da177e4SLinus Torvalds 9666520fe55SH. Peter Anvinarchprepare: archheaders archscripts prepare1 scripts_basic 9675bb78269SSam Ravnborg 9685bb78269SSam Ravnborgprepare0: archprepare FORCE 9698d36a623SSam Ravnborg $(Q)$(MAKE) $(build)=. 97086feeaa8SSam Ravnborg 9711da177e4SLinus Torvalds# All the preparing.. 972d395efb5SRobert P. J. Dayprepare: prepare0 9731da177e4SLinus Torvalds 9741da177e4SLinus Torvalds# Generate some files 9751da177e4SLinus Torvalds# --------------------------------------------------------------------------- 9761da177e4SLinus Torvalds 9771da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h 9781da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds 9791da177e4SLinus Torvalds 9801da177e4SLinus Torvaldsuts_len := 64 98163104eecSSam Ravnborgdefine filechk_utsrelease.h 9821da177e4SLinus Torvalds if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 9831da177e4SLinus Torvalds echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 9841da177e4SLinus Torvalds exit 1; \ 9851da177e4SLinus Torvalds fi; \ 98663104eecSSam Ravnborg (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 9871da177e4SLinus Torvaldsendef 9881da177e4SLinus Torvalds 98963104eecSSam Ravnborgdefine filechk_version.h 99063104eecSSam Ravnborg (echo \#define LINUX_VERSION_CODE $(shell \ 99178d3bb44SMichal Marek expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 99263104eecSSam Ravnborg echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 99363104eecSSam Ravnborgendef 99463104eecSSam Ravnborg 995d183e6f5SDavid Howells$(version_h): $(srctree)/Makefile FORCE 9961da177e4SLinus Torvalds $(call filechk,version.h) 9971da177e4SLinus Torvalds 998273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE 99963104eecSSam Ravnborg $(call filechk,utsrelease.h) 100063104eecSSam Ravnborg 1001179efcb4SVegard NossumPHONY += headerdep 1002179efcb4SVegard Nossumheaderdep: 10039663d989SPeter Foley $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 10049663d989SPeter Foley $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1005179efcb4SVegard Nossum 10061da177e4SLinus Torvalds# --------------------------------------------------------------------------- 10071da177e4SLinus Torvalds 10084f193362SPaul SmithPHONY += depend dep 10091da177e4SLinus Torvaldsdepend dep: 10101da177e4SLinus Torvalds @echo '*** Warning: make $@ is unnecessary now.' 10111da177e4SLinus Torvalds 10121da177e4SLinus Torvalds# --------------------------------------------------------------------------- 101388ecf814SDavid Woodhouse# Firmware install 101488ecf814SDavid WoodhouseINSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 101588ecf814SDavid Woodhouseexport INSTALL_FW_PATH 101688ecf814SDavid Woodhouse 101788ecf814SDavid WoodhousePHONY += firmware_install 101888ecf814SDavid Woodhousefirmware_install: FORCE 101988ecf814SDavid Woodhouse @mkdir -p $(objtree)/firmware 102088ecf814SDavid Woodhouse $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 102188ecf814SDavid Woodhouse 102288ecf814SDavid Woodhouse# --------------------------------------------------------------------------- 10238d730cfbSDavid Woodhouse# Kernel headers 10248d730cfbSDavid Woodhouse 1025e6883b18SSam Ravnborg#Default location for installed headers 1026e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr 1027e6883b18SSam Ravnborg 1028e6883b18SSam Ravnborghdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 10292fb9b1bdSSam Ravnborg 10302fb9b1bdSSam Ravnborg# If we do an all arch process set dst to asm-$(hdr-arch) 10312fb9b1bdSSam Ravnborghdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1032e6883b18SSam Ravnborg 1033052ad274SH. Peter AnvinPHONY += archheaders 1034052ad274SH. Peter Anvinarchheaders: 1035052ad274SH. Peter Anvin 10366520fe55SH. Peter AnvinPHONY += archscripts 10376520fe55SH. Peter Anvinarchscripts: 10386520fe55SH. Peter Anvin 1039e6883b18SSam RavnborgPHONY += __headers 1040d183e6f5SDavid Howells__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE 1041e1b702cfSMike Waychison $(Q)$(MAKE) $(build)=scripts build_unifdef 10426d716275SDavid Woodhouse 10436d716275SDavid WoodhousePHONY += headers_install_all 10442fb9b1bdSSam Ravnborgheaders_install_all: 10452fb9b1bdSSam Ravnborg $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 10466d716275SDavid Woodhouse 10478d730cfbSDavid WoodhousePHONY += headers_install 1048e6883b18SSam Ravnborgheaders_install: __headers 104910b63956SDavid Howells $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \ 10502fb9b1bdSSam Ravnborg $(error Headers not exportable for the $(SRCARCH) architecture)) 105110b63956SDavid Howells $(Q)$(MAKE) $(hdr-inst)=include/uapi 105210b63956SDavid Howells $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) 10538d730cfbSDavid Woodhouse 10541f85712eSMike FrysingerPHONY += headers_check_all 10551f85712eSMike Frysingerheaders_check_all: headers_install_all 10562fb9b1bdSSam Ravnborg $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 10571f85712eSMike Frysinger 105868475359SDavid WoodhousePHONY += headers_check 105968475359SDavid Woodhouseheaders_check: headers_install 106010b63956SDavid Howells $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 106110b63956SDavid Howells $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1 106268475359SDavid Woodhouse 10638d730cfbSDavid Woodhouse# --------------------------------------------------------------------------- 10645a5da78bSShuah Khan# Kernel selftest 10655a5da78bSShuah Khan 10665a5da78bSShuah KhanPHONY += kselftest 10675a5da78bSShuah Khankselftest: 10685a5da78bSShuah Khan $(Q)$(MAKE) -C tools/testing/selftests run_tests 10695a5da78bSShuah Khan 10705a5da78bSShuah Khan# --------------------------------------------------------------------------- 10711da177e4SLinus Torvalds# Modules 10721da177e4SLinus Torvalds 10731da177e4SLinus Torvaldsifdef CONFIG_MODULES 10741da177e4SLinus Torvalds 10751da177e4SLinus Torvalds# By default, build modules as well 10761da177e4SLinus Torvalds 107773d1393eSMichal Marekall: modules 10781da177e4SLinus Torvalds 10791da177e4SLinus Torvalds# Build modules 1080551559e1STejun Heo# 1081551559e1STejun Heo# A module can be listed more than once in obj-m resulting in 1082551559e1STejun Heo# duplicate lines in modules.order files. Those are removed 1083551559e1STejun Heo# using awk while concatenating to the final file. 10841da177e4SLinus Torvalds 10854f193362SPaul SmithPHONY += modules 10862da30e70SMichal Marekmodules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1087551559e1STejun Heo $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1088fd54f502SMike Frysinger @$(kecho) ' Building modules, stage 2.'; 1089b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 109044463f7dSDavid Woodhouse $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 10911da177e4SLinus Torvalds 1092a6c36632SMichal Marekmodules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1093a6c36632SMichal Marek $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1094a6c36632SMichal Marek 109573d1393eSMichal Marek%/modules.builtin: include/config/auto.conf 1096a6c36632SMichal Marek $(Q)$(MAKE) $(modbuiltin)=$* 1097a6c36632SMichal Marek 10981da177e4SLinus Torvalds 10991da177e4SLinus Torvalds# Target to prepare building external modules 11004f193362SPaul SmithPHONY += modules_prepare 11015bb78269SSam Ravnborgmodules_prepare: prepare scripts 11021da177e4SLinus Torvalds 11031da177e4SLinus Torvalds# Target to install modules 11044f193362SPaul SmithPHONY += modules_install 11051da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post 11061da177e4SLinus Torvalds 11074f193362SPaul SmithPHONY += _modinst_ 11082da30e70SMichal Marek_modinst_: 11091da177e4SLinus Torvalds @rm -rf $(MODLIB)/kernel 11101da177e4SLinus Torvalds @rm -f $(MODLIB)/source 11111da177e4SLinus Torvalds @mkdir -p $(MODLIB)/kernel 1112890676c6SMichal Marek @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source 11131da177e4SLinus Torvalds @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 11141da177e4SLinus Torvalds rm -f $(MODLIB)/build ; \ 11157e1c0477SMichal Marek ln -s $(CURDIR) $(MODLIB)/build ; \ 11161da177e4SLinus Torvalds fi 1117551559e1STejun Heo @cp -f $(objtree)/modules.order $(MODLIB)/ 1118bc081dd6SMichal Marek @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1119b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 11201da177e4SLinus Torvalds 112150a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial 11221da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write. However the 11231da177e4SLinus Torvalds# boot script depmod is the master version. 11244f193362SPaul SmithPHONY += _modinst_post 11256d128e1eSLinus Torvalds_modinst_post: _modinst_ 112688ecf814SDavid Woodhouse $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 112750a8ec31SSam Ravnborg $(call cmd,depmod) 11281da177e4SLinus Torvalds 1129d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y) 1130d890f510SJosh BoyerPHONY += modules_sign 1131d890f510SJosh Boyermodules_sign: 1132d890f510SJosh Boyer $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1133d890f510SJosh Boyerendif 1134d890f510SJosh Boyer 11351da177e4SLinus Torvaldselse # CONFIG_MODULES 11361da177e4SLinus Torvalds 11371da177e4SLinus Torvalds# Modules not configured 11381da177e4SLinus Torvalds# --------------------------------------------------------------------------- 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvaldsmodules modules_install: FORCE 11415369f550SMichal Marek @echo >&2 11425369f550SMichal Marek @echo >&2 "The present kernel configuration has modules disabled." 11435369f550SMichal Marek @echo >&2 "Type 'make config' and enable loadable module support." 11445369f550SMichal Marek @echo >&2 "Then build a kernel with module support enabled." 11455369f550SMichal Marek @echo >&2 11461da177e4SLinus Torvalds @exit 1 11471da177e4SLinus Torvalds 11481da177e4SLinus Torvaldsendif # CONFIG_MODULES 11491da177e4SLinus Torvalds 11501da177e4SLinus Torvalds### 11511da177e4SLinus Torvalds# Cleaning is done on three levels. 11521da177e4SLinus Torvalds# make clean Delete most generated files 11531da177e4SLinus Torvalds# Leave enough to build external modules 11541da177e4SLinus Torvalds# make mrproper Delete the current configuration, and all generated files 11551da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like 11561da177e4SLinus Torvalds 11571da177e4SLinus Torvalds# Directories & files removed with 'make clean' 11581da177e4SLinus TorvaldsCLEAN_DIRS += $(MODVERDIR) 11591da177e4SLinus Torvalds 11601da177e4SLinus Torvalds# Directories & files removed with 'make mrproper' 1161d8ecc5cdSSam RavnborgMRPROPER_DIRS += include/config usr/include include/generated \ 116279192ca8SJason Cooper arch/*/include/generated .tmp_objdiff 1163d183e6f5SDavid HowellsMRPROPER_FILES += .config .config.old .version .old_version $(version_h) \ 1164d5b71936SRusty Russell Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ 1165d5b71936SRusty Russell signing_key.priv signing_key.x509 x509.genkey \ 1166d5b71936SRusty Russell extra_certificates signing_key.x509.keyid \ 11679c8cdb71SPaul Gortmaker signing_key.x509.signer include/linux/version.h 11681da177e4SLinus Torvalds 11691da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules 11701da177e4SLinus Torvalds# 11711da177e4SLinus Torvaldsclean: rm-dirs := $(CLEAN_DIRS) 11721da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES) 1173fb68d4beSGerard Snitselaarclean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) 11741da177e4SLinus Torvalds 1175bd1ee804SPawel MollPHONY += $(clean-dirs) clean archclean vmlinuxclean 11761da177e4SLinus Torvalds$(clean-dirs): 11771da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 11781da177e4SLinus Torvalds 1179bd1ee804SPawel Mollvmlinuxclean: 1180bd1ee804SPawel Moll $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1181bd1ee804SPawel Moll 1182bd1ee804SPawel Mollclean: archclean vmlinuxclean 11831da177e4SLinus Torvalds 11841da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config 11851da177e4SLinus Torvalds# 11861da177e4SLinus Torvaldsmrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 11871da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 11881da177e4SLinus Torvaldsmrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 11891da177e4SLinus Torvalds 11904f193362SPaul SmithPHONY += $(mrproper-dirs) mrproper archmrproper 11911da177e4SLinus Torvalds$(mrproper-dirs): 11921da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 11931da177e4SLinus Torvalds 11941da177e4SLinus Torvaldsmrproper: clean archmrproper $(mrproper-dirs) 11951da177e4SLinus Torvalds $(call cmd,rmdirs) 11961da177e4SLinus Torvalds $(call cmd,rmfiles) 11971da177e4SLinus Torvalds 11981da177e4SLinus Torvalds# distclean 11991da177e4SLinus Torvalds# 12004f193362SPaul SmithPHONY += distclean 12011da177e4SLinus Torvalds 12021da177e4SLinus Torvaldsdistclean: mrproper 12031da177e4SLinus Torvalds @find $(srctree) $(RCS_FIND_IGNORE) \ 12041da177e4SLinus Torvalds \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 12051da177e4SLinus Torvalds -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1206a03fcb50SMasahiro Yamada -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \ 12071da177e4SLinus Torvalds -type f -print | xargs rm -f 12081da177e4SLinus Torvalds 12091da177e4SLinus Torvalds 12101da177e4SLinus Torvalds# Packaging of the kernel to various formats 12111da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12121da177e4SLinus Torvalds# rpm target kept for backward compatibility 1213c79624c1SMichal Marekpackage-dir := scripts/package 12141da177e4SLinus Torvalds 1215bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE 1216bafb6747SArnaldo Carvalho de Melo $(Q)$(MAKE) $(build)=$(package-dir) $@ 1217031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE 12186c2133e1SSam Ravnborg $(Q)$(MAKE) $(build)=$(package-dir) $@ 1219031ecc6dSZach Brownrpm: include/config/kernel.release FORCE 12206c2133e1SSam Ravnborg $(Q)$(MAKE) $(build)=$(package-dir) $@ 12211da177e4SLinus Torvalds 12221da177e4SLinus Torvalds 12231da177e4SLinus Torvalds# Brief documentation of the typical targets used 12241da177e4SLinus Torvalds# --------------------------------------------------------------------------- 12251da177e4SLinus Torvalds 12265dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 12271da177e4SLinus Torvaldsboards := $(notdir $(boards)) 12285dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 12295dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=))) 12301da177e4SLinus Torvalds 12311da177e4SLinus Torvaldshelp: 12321da177e4SLinus Torvalds @echo 'Cleaning targets:' 12335ea084efSSamuel Tardieu @echo ' clean - Remove most generated files but keep the config and' 12345cc8d246SJesper Juhl @echo ' enough build support to build external modules' 12355ea084efSSamuel Tardieu @echo ' mrproper - Remove all generated files + config + various backup files' 12365cc8d246SJesper Juhl @echo ' distclean - mrproper + remove editor backup and patch files' 12371da177e4SLinus Torvalds @echo '' 12381da177e4SLinus Torvalds @echo 'Configuration targets:' 12391da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 12401da177e4SLinus Torvalds @echo '' 12411da177e4SLinus Torvalds @echo 'Other generic targets:' 12421da177e4SLinus Torvalds @echo ' all - Build all targets marked with [*]' 12431da177e4SLinus Torvalds @echo '* vmlinux - Build the bare kernel' 12441da177e4SLinus Torvalds @echo '* modules - Build all modules' 12459cc5d74cSBodo Eggert @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 124688ecf814SDavid Woodhouse @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 124788ecf814SDavid Woodhouse @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 12481da177e4SLinus Torvalds @echo ' dir/ - Build all files in dir and below' 124962718979SJoe Perches @echo ' dir/file.[oisS] - Build specified target only' 125062718979SJoe Perches @echo ' dir/file.lst - Build specified mixed source/assembly target only' 125162718979SJoe Perches @echo ' (requires a recent binutils and recent build (System.map))' 1252155ad605SSam Ravnborg @echo ' dir/file.ko - Build module including final link' 1253c4d5ee67SRobert P. J. Day @echo ' modules_prepare - Set up for building external modules' 12541da177e4SLinus Torvalds @echo ' tags/TAGS - Generate tags file for editors' 12551da177e4SLinus Torvalds @echo ' cscope - Generate cscope index' 1256f4ed1009SJianbin Kang @echo ' gtags - Generate GNU GLOBAL index' 12573f1d9a6cSMichal Marek @echo ' kernelrelease - Output the release version string (use with make -s)' 12583f1d9a6cSMichal Marek @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 12593f1d9a6cSMichal Marek @echo ' image_name - Output the image name (use with make -s)' 12602fb9b1bdSSam Ravnborg @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 126159df3230SGeert Uytterhoeven echo ' (default: $(INSTALL_HDR_PATH))'; \ 12622fb9b1bdSSam Ravnborg echo '' 12631da177e4SLinus Torvalds @echo 'Static analysers' 12641da177e4SLinus Torvalds @echo ' checkstack - Generate a list of stack hogs' 12651da177e4SLinus Torvalds @echo ' namespacecheck - Name space analysis on compiled kernel' 1266aa025e7dSSam Ravnborg @echo ' versioncheck - Sanity check on version.h usage' 1267ec2d987fSRandy Dunlap @echo ' includecheck - Check for duplicate included header files' 1268295ac051SAdrian Bunk @echo ' export_report - List the usages of all exported symbols' 1269179efcb4SVegard Nossum @echo ' headers_check - Sanity check on exported headers' 127074425eeeSNicolas Palix @echo ' headerdep - Detect inclusion cycles in headers' 127174425eeeSNicolas Palix @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help 127274425eeeSNicolas Palix @echo '' 12735a5da78bSShuah Khan @echo 'Kernel selftest' 12745a5da78bSShuah Khan @echo ' kselftest - Build and run kernel selftest (run as root)' 12755a5da78bSShuah Khan @echo ' Build, install, and boot kernel before' 12765a5da78bSShuah Khan @echo ' running kselftest on it' 12775a5da78bSShuah Khan @echo '' 12781da177e4SLinus Torvalds @echo 'Kernel packaging:' 12796c2133e1SSam Ravnborg @$(MAKE) $(build)=$(package-dir) help 12801da177e4SLinus Torvalds @echo '' 12811da177e4SLinus Torvalds @echo 'Documentation targets:' 12821da177e4SLinus Torvalds @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 12831da177e4SLinus Torvalds @echo '' 128401dee188SAndres Salomon @echo 'Architecture specific targets ($(SRCARCH)):' 12851da177e4SLinus Torvalds @$(if $(archhelp),$(archhelp),\ 128601dee188SAndres Salomon echo ' No architecture specific help defined for $(SRCARCH)') 12871da177e4SLinus Torvalds @echo '' 12881da177e4SLinus Torvalds @$(if $(boards), \ 12891da177e4SLinus Torvalds $(foreach b, $(boards), \ 12901da177e4SLinus Torvalds printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 12911da177e4SLinus Torvalds echo '') 12925dffbe81SSegher Boessenkool @$(if $(board-dirs), \ 12935dffbe81SSegher Boessenkool $(foreach b, $(board-dirs), \ 12945dffbe81SSegher Boessenkool printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 12955dffbe81SSegher Boessenkool printf " %-16s - Show all of the above\\n" help-boards; \ 12965dffbe81SSegher Boessenkool echo '') 12971da177e4SLinus Torvalds 12981da177e4SLinus Torvalds @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 129945d506bdSSam Ravnborg @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 13001da177e4SLinus Torvalds @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1301701842e3SDustin Kirkland @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1302701842e3SDustin Kirkland @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1303af07ce3eSIngo Molnar @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 130428bc20dcSSam Ravnborg @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 130528bc20dcSSam Ravnborg @echo ' 1: warnings which may be relevant and do not occur too often' 130628bc20dcSSam Ravnborg @echo ' 2: warnings which occur quite often but may still be relevant' 130728bc20dcSSam Ravnborg @echo ' 3: more obscure warnings, can most likely be ignored' 1308a6de553dSMichal Marek @echo ' Multiple levels can be combined with W=12 or W=123' 13091da177e4SLinus Torvalds @echo '' 13101da177e4SLinus Torvalds @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 13111da177e4SLinus Torvalds @echo 'For further info see the ./README file' 13121da177e4SLinus Torvalds 13131da177e4SLinus Torvalds 13145dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs)) 13155dffbe81SSegher Boessenkool 13165dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs) 13175dffbe81SSegher Boessenkool 13185dffbe81SSegher Boessenkoolboards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 13195dffbe81SSegher Boessenkool 13205dffbe81SSegher Boessenkool$(help-board-dirs): help-%: 13215dffbe81SSegher Boessenkool @echo 'Architecture specific targets ($(SRCARCH) $*):' 13225dffbe81SSegher Boessenkool @$(if $(boards-per-dir), \ 13235dffbe81SSegher Boessenkool $(foreach b, $(boards-per-dir), \ 13245dffbe81SSegher Boessenkool printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 13255dffbe81SSegher Boessenkool echo '') 13265dffbe81SSegher Boessenkool 13275dffbe81SSegher Boessenkool 13281da177e4SLinus Torvalds# Documentation targets 13291da177e4SLinus Torvalds# --------------------------------------------------------------------------- 13301da177e4SLinus Torvalds%docs: scripts_basic FORCE 1331bffd2020SPeter Foley $(Q)$(MAKE) $(build)=scripts build_docproc 13321da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 13331da177e4SLinus Torvalds 13341da177e4SLinus Torvaldselse # KBUILD_EXTMOD 13351da177e4SLinus Torvalds 13361da177e4SLinus Torvalds### 13371da177e4SLinus Torvalds# External module support. 13381da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered 13391da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make 13401da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required 13411da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must 13421da177e4SLinus Torvalds# be used. 13431da177e4SLinus Torvalds# 13441da177e4SLinus Torvalds# The following are the only valid targets when building external 13451da177e4SLinus Torvalds# modules. 13461da177e4SLinus Torvalds# make M=dir clean Delete all automatically generated files 13471da177e4SLinus Torvalds# make M=dir modules Make all modules in specified dir 13481da177e4SLinus Torvalds# make M=dir Same as 'make M=dir modules' 13491da177e4SLinus Torvalds# make M=dir modules_install 1350070b98bfSSam Ravnborg# Install the modules built in the module directory 13511da177e4SLinus Torvalds# Assumes install directory is already created 13521da177e4SLinus Torvalds 13531da177e4SLinus Torvalds# We are always building modules 13541da177e4SLinus TorvaldsKBUILD_MODULES := 1 13554f193362SPaul SmithPHONY += crmodverdir 13561da177e4SLinus Torvaldscrmodverdir: 13577bb9d092SSam Ravnborg $(cmd_crmodverdir) 13581da177e4SLinus Torvalds 13594f193362SPaul SmithPHONY += $(objtree)/Module.symvers 13601da177e4SLinus Torvalds$(objtree)/Module.symvers: 13611da177e4SLinus Torvalds @test -e $(objtree)/Module.symvers || ( \ 13621da177e4SLinus Torvalds echo; \ 13631da177e4SLinus Torvalds echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 13641da177e4SLinus Torvalds echo " is missing; modules will have no dependencies and modversions."; \ 13651da177e4SLinus Torvalds echo ) 13661da177e4SLinus Torvalds 13671da177e4SLinus Torvaldsmodule-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 13684f193362SPaul SmithPHONY += $(module-dirs) modules 13691da177e4SLinus Torvalds$(module-dirs): crmodverdir $(objtree)/Module.symvers 13701da177e4SLinus Torvalds $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 13711da177e4SLinus Torvalds 13721da177e4SLinus Torvaldsmodules: $(module-dirs) 1373fd54f502SMike Frysinger @$(kecho) ' Building modules, stage 2.'; 1374b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 13751da177e4SLinus Torvalds 13764f193362SPaul SmithPHONY += modules_install 1377a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post 1378a67dc21aSSam Ravnborg 1379a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 13804f193362SPaul SmithPHONY += _emodinst_ 1381a67dc21aSSam Ravnborg_emodinst_: 1382a67dc21aSSam Ravnborg $(Q)mkdir -p $(MODLIB)/$(install-dir) 1383b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 13841da177e4SLinus Torvalds 13854f193362SPaul SmithPHONY += _emodinst_post 1386a67dc21aSSam Ravnborg_emodinst_post: _emodinst_ 1387a67dc21aSSam Ravnborg $(call cmd,depmod) 1388a67dc21aSSam Ravnborg 13891da177e4SLinus Torvaldsclean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 13901da177e4SLinus Torvalds 13914f193362SPaul SmithPHONY += $(clean-dirs) clean 13921da177e4SLinus Torvalds$(clean-dirs): 13931da177e4SLinus Torvalds $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 13941da177e4SLinus Torvalds 13951da177e4SLinus Torvaldsclean: rm-dirs := $(MODVERDIR) 139688d7be03SMichal Marekclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 13971da177e4SLinus Torvalds 13981da177e4SLinus Torvaldshelp: 13991da177e4SLinus Torvalds @echo ' Building external modules.' 14001da177e4SLinus Torvalds @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 14011da177e4SLinus Torvalds @echo '' 14021da177e4SLinus Torvalds @echo ' modules - default target, build the module(s)' 14031da177e4SLinus Torvalds @echo ' modules_install - install the module' 14041da177e4SLinus Torvalds @echo ' clean - remove generated files in module directory only' 14051da177e4SLinus Torvalds @echo '' 140606300b21SSam Ravnborg 140706300b21SSam Ravnborg# Dummies... 14084f193362SPaul SmithPHONY += prepare scripts 140906300b21SSam Ravnborgprepare: ; 141006300b21SSam Ravnborgscripts: ; 14111da177e4SLinus Torvaldsendif # KBUILD_EXTMOD 14121da177e4SLinus Torvalds 141388d7be03SMichal Marekclean: $(clean-dirs) 141488d7be03SMichal Marek $(call cmd,rmdirs) 141588d7be03SMichal Marek $(call cmd,rmfiles) 141643f67c98SKevin Cernekee @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 141788d7be03SMichal Marek \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1418addbcdbbSDavid Howells -o -name '*.ko.*' \ 1419866ced95SAndi Kleen -o -name '*.dwo' \ 142088d7be03SMichal Marek -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 142188d7be03SMichal Marek -o -name '*.symtypes' -o -name 'modules.order' \ 142288d7be03SMichal Marek -o -name modules.builtin -o -name '.tmp_*.o.*' \ 142388d7be03SMichal Marek -o -name '*.gcno' \) -type f -print | xargs rm -f 142488d7be03SMichal Marek 14251da177e4SLinus Torvalds# Generate tags for editors 14261da177e4SLinus Torvalds# --------------------------------------------------------------------------- 1427a680eedcSSam Ravnborgquiet_cmd_tags = GEN $@ 1428a680eedcSSam Ravnborg cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 14291da177e4SLinus Torvalds 1430f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE 14311da177e4SLinus Torvalds $(call cmd,tags) 14321da177e4SLinus Torvalds 14331da177e4SLinus Torvalds# Scripts to check various things for consistency 14341da177e4SLinus Torvalds# --------------------------------------------------------------------------- 14351da177e4SLinus Torvalds 1436279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report 1437279f3dd3SPeter Foley 14381da177e4SLinus Torvaldsincludecheck: 1439436f876cSPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 14401da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 144180007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 14421da177e4SLinus Torvalds 14431da177e4SLinus Torvaldsversioncheck: 14442ee2d292SPeter Foley find $(srctree)/* $(RCS_FIND_IGNORE) \ 14451da177e4SLinus Torvalds -name '*.[hcS]' -type f -print | sort \ 144680007434SGeert Uytterhoeven | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 14471da177e4SLinus Torvalds 144874425eeeSNicolas Palixcoccicheck: 144974425eeeSNicolas Palix $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 145074425eeeSNicolas Palix 14511da177e4SLinus Torvaldsnamespacecheck: 14521da177e4SLinus Torvalds $(PERL) $(srctree)/scripts/namespace.pl 14531da177e4SLinus Torvalds 1454295ac051SAdrian Bunkexport_report: 1455295ac051SAdrian Bunk $(PERL) $(srctree)/scripts/export_report.pl 1456295ac051SAdrian Bunk 14571da177e4SLinus Torvaldsendif #ifeq ($(config-targets),1) 14581da177e4SLinus Torvaldsendif #ifeq ($(mixed-targets),1) 14591da177e4SLinus Torvalds 1460c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name 1461e3ccf6e3SJeff Dike 1462011e3a9aSJeff Dike# UML needs a little special treatment here. It wants to use the host 1463011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1464011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means 1465011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here. 1466011e3a9aSJeff Dikeifeq ($(ARCH), um) 1467011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH) 1468011e3a9aSJeff Dikeelse 1469011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH) 1470011e3a9aSJeff Dikeendif 14711da177e4SLinus Torvaldscheckstack: 14721da177e4SLinus Torvalds $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1473011e3a9aSJeff Dike $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 14741da177e4SLinus Torvalds 14757b8ea53dSAmerigo Wangkernelrelease: 14767b8ea53dSAmerigo Wang @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 147701ab1788SAmerigo Wang 1478cb58455cSSam Ravnborgkernelversion: 14792244cbd8SSam Ravnborg @echo $(KERNELVERSION) 14801da177e4SLinus Torvalds 1481c398ff00SMike Marciniszynimage_name: 1482c398ff00SMike Marciniszyn @echo $(KBUILD_IMAGE) 1483c398ff00SMike Marciniszyn 1484ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake 1485ea01fa9fSBorislav Petkovtools/: FORCE 1486bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 1487a50e4333SBorislav Petkov $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ 1488ea01fa9fSBorislav Petkov 1489ea01fa9fSBorislav Petkovtools/%: FORCE 1490bf35182fSDavid Howells $(Q)mkdir -p $(objtree)/tools 1491a50e4333SBorislav Petkov $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $* 1492ea01fa9fSBorislav Petkov 149306300b21SSam Ravnborg# Single targets 149406300b21SSam Ravnborg# --------------------------------------------------------------------------- 1495bc2546a6SSam Ravnborg# Single targets are compatible with: 1496e1b8513dSRobert P. J. Day# - build with mixed source and output 1497bc2546a6SSam Ravnborg# - build with separate output dir 'make O=...' 1498bc2546a6SSam Ravnborg# - external modules 1499bc2546a6SSam Ravnborg# 1500bc2546a6SSam Ravnborg# target-dir => where to store outputfile 1501bc2546a6SSam Ravnborg# build-dir => directory in kernel source tree to use 150206300b21SSam Ravnborg 150306300b21SSam Ravnborgifeq ($(KBUILD_EXTMOD),) 1504aa360879SSam Ravnborg build-dir = $(patsubst %/,%,$(dir $@)) 1505bc2546a6SSam Ravnborg target-dir = $(dir $@) 150606300b21SSam Ravnborgelse 150706300b21SSam Ravnborg zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1508bc2546a6SSam Ravnborg build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1509bc2546a6SSam Ravnborg target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 151006300b21SSam Ravnborgendif 151106300b21SSam Ravnborg 1512bc2546a6SSam Ravnborg%.s: %.c prepare scripts FORCE 1513bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1514bc2546a6SSam Ravnborg%.i: %.c prepare scripts FORCE 1515bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1516bc2546a6SSam Ravnborg%.o: %.c prepare scripts FORCE 1517bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1518bc2546a6SSam Ravnborg%.lst: %.c prepare scripts FORCE 1519bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1520bc2546a6SSam Ravnborg%.s: %.S prepare scripts FORCE 1521bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1522bc2546a6SSam Ravnborg%.o: %.S prepare scripts FORCE 1523bc2546a6SSam Ravnborg $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 152415fde675SAndreas Gruenbacher%.symtypes: %.c prepare scripts FORCE 152515fde675SAndreas Gruenbacher $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1526bc2546a6SSam Ravnborg 1527bc2546a6SSam Ravnborg# Modules 152831110ebbSSam Ravnborg/: prepare scripts FORCE 152931110ebbSSam Ravnborg $(cmd_crmodverdir) 153031110ebbSSam Ravnborg $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 153131110ebbSSam Ravnborg $(build)=$(build-dir) 153231110ebbSSam Ravnborg%/: prepare scripts FORCE 15337bb9d092SSam Ravnborg $(cmd_crmodverdir) 153406300b21SSam Ravnborg $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1535bc2546a6SSam Ravnborg $(build)=$(build-dir) 1536bc2546a6SSam Ravnborg%.ko: prepare scripts FORCE 15377bb9d092SSam Ravnborg $(cmd_crmodverdir) 153806300b21SSam Ravnborg $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1539bc2546a6SSam Ravnborg $(build)=$(build-dir) $(@:.ko=.o) 1540b805aa0eSSam Ravnborg $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 154106300b21SSam Ravnborg 15421da177e4SLinus Torvalds# FIXME Should go into a make.lib or something 15431da177e4SLinus Torvalds# =========================================================================== 15441da177e4SLinus Torvalds 15451da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 15461da177e4SLinus Torvalds cmd_rmdirs = rm -rf $(rm-dirs) 15471da177e4SLinus Torvalds 15481da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 15491da177e4SLinus Torvalds cmd_rmfiles = rm -f $(rm-files) 15501da177e4SLinus Torvalds 1551bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable 155250a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1553569658ddSMichal Marek cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1554b92021b0SRusty Russell $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))" 155550a8ec31SSam Ravnborg 15567bb9d092SSam Ravnborg# Create temporary dir for module support files 1557ab19f879SSam Ravnborg# clean it up only when building all modules 1558ab19f879SSam Ravnborgcmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1559ab19f879SSam Ravnborg $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 15601da177e4SLinus Torvalds 15611da177e4SLinus Torvalds# read all saved command lines 15621da177e4SLinus Torvalds 15631da177e4SLinus Torvaldstargets := $(wildcard $(sort $(targets))) 15641da177e4SLinus Torvaldscmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 15651da177e4SLinus Torvalds 15661da177e4SLinus Torvaldsifneq ($(cmd_files),) 15671da177e4SLinus Torvalds $(cmd_files): ; # Do not try to update included dependency files 15681da177e4SLinus Torvalds include $(cmd_files) 15691da177e4SLinus Torvaldsendif 15701da177e4SLinus Torvalds 15711da177e4SLinus Torvalds# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 15721da177e4SLinus Torvalds# Usage: 15731da177e4SLinus Torvalds# $(Q)$(MAKE) $(clean)=dir 15741da177e4SLinus Torvaldsclean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 15751da177e4SLinus Torvalds 15761da177e4SLinus Torvaldsendif # skip-makefile 15771da177e4SLinus Torvalds 15784f193362SPaul SmithPHONY += FORCE 15791da177e4SLinus TorvaldsFORCE: 15804f193362SPaul Smith 15814f193362SPaul Smith# Declare the contents of the .PHONY variable as phony. We keep that 1582fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends. 15834f193362SPaul Smith.PHONY: $(PHONY) 1584