blob: d96f56e1bfcda9e26499afcc99af5b183479bef9 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds0ce790e2011-03-29 12:09:47 -07003SUBLEVEL = 39
4EXTRAVERSION = -rc1
Linus Torvaldscd072022010-10-14 16:26:43 -07005NAME = Flesh-Eating Bats with Fangs
Linus Torvalds1da177e2005-04-16 15:20:36 -07006
7# *DOCUMENTATION*
8# To see a list of typical targets execute "make help"
9# More info can be located in ./README
10# Comments in this file are targeted only to the developer, do not
11# expect to learn how to build the kernel reading this file.
12
Oleg Verych15964862006-12-10 02:18:40 -080013# Do not:
14# o use make's built-in rules and variables
Linus Nilssond384e352008-01-20 17:10:01 +010015# (this increases performance and avoids hard-to-debug behaviour);
Oleg Verych15964862006-12-10 02:18:40 -080016# o print "Entering directory ...";
17MAKEFLAGS += -rR --no-print-directory
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
H. Peter Anvinc0513462009-12-17 06:56:11 -080019# Avoid funny character set dependencies
H. Peter Anvin06b5dc62009-12-17 15:51:37 -080020unexport LC_ALL
H. Peter Anvinc0513462009-12-17 06:56:11 -080021LC_COLLATE=C
22LC_NUMERIC=C
Michal Marek07105202010-01-08 12:25:37 +010023export LC_COLLATE LC_NUMERIC
H. Peter Anvinc0513462009-12-17 06:56:11 -080024
Linus Torvalds1da177e2005-04-16 15:20:36 -070025# We are using a recursive build, so we need to do a little thinking
26# to get the ordering right.
27#
28# Most importantly: sub-Makefiles should only ever modify files in
29# their own directory. If in some directory we have a dependency on
30# a file in another dir (which doesn't happen often, but it's often
31# unavoidable when linking the built-in.o targets which finally
32# turn into vmlinux), we will call a sub make in that other dir, and
33# after that we are sure that everything which is in that other dir
34# is now up to date.
35#
36# The only cases where we need to modify files which have global
37# effects are thus separated out and done before the recursive
38# descending is started. They are now explicitly listed as the
39# prepare rule.
40
41# To put more focus on warnings, be less verbose as default
42# Use 'make V=1' to see the full commands
43
Cheng Renquanb8b06182009-05-26 16:03:07 +080044ifeq ("$(origin V)", "command line")
45 KBUILD_VERBOSE = $(V)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046endif
47ifndef KBUILD_VERBOSE
48 KBUILD_VERBOSE = 0
49endif
50
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040051# Call a source code checker (by default, "sparse") as part of the
52# C compilation.
53#
54# Use 'make C=1' to enable checking of only re-compiled files.
55# Use 'make C=2' to enable checking of *all* source files, regardless
56# of whether they are re-compiled or not.
57#
58# See the file "Documentation/sparse.txt" for more details, including
59# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
Cheng Renquanb8b06182009-05-26 16:03:07 +080061ifeq ("$(origin C)", "command line")
62 KBUILD_CHECKSRC = $(C)
Linus Torvalds1da177e2005-04-16 15:20:36 -070063endif
64ifndef KBUILD_CHECKSRC
65 KBUILD_CHECKSRC = 0
66endif
67
68# Use make M=dir to specify directory of external module to build
69# Old syntax make ... SUBDIRS=$PWD is still supported
70# Setting the environment variable KBUILD_EXTMOD take precedence
71ifdef SUBDIRS
72 KBUILD_EXTMOD ?= $(SUBDIRS)
73endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Cheng Renquanb8b06182009-05-26 16:03:07 +080075ifeq ("$(origin M)", "command line")
76 KBUILD_EXTMOD := $(M)
77endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79# kbuild supports saving output files in a separate directory.
80# To locate output files in a separate directory two syntaxes are supported.
81# In both cases the working directory must be the root of the kernel src.
82# 1) O=
83# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020084#
Linus Torvalds1da177e2005-04-16 15:20:36 -070085# 2) Set KBUILD_OUTPUT
86# Set the environment variable KBUILD_OUTPUT to point to the directory
87# where the output files shall be placed.
88# export KBUILD_OUTPUT=dir/to/store/output/files/
89# make
90#
91# The O= assignment takes precedence over the KBUILD_OUTPUT environment
92# variable.
93
94
95# KBUILD_SRC is set on invocation of make in OBJ directory
96# KBUILD_SRC is not intended to be used by the regular user (for now)
97ifeq ($(KBUILD_SRC),)
98
99# OK, Make called in directory where kernel src resides
100# Do we want to locate output files in a separate directory?
Cheng Renquanb8b06182009-05-26 16:03:07 +0800101ifeq ("$(origin O)", "command line")
102 KBUILD_OUTPUT := $(O)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103endif
104
Borislav Petkov4a5838a2011-03-01 09:35:29 +0100105ifeq ("$(origin W)", "command line")
Sam Ravnborg28bc20d2011-04-27 22:15:27 +0200106 export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
Borislav Petkov4a5838a2011-03-01 09:35:29 +0100107endif
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500110PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111_all:
112
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100113# Cancel implicit rules on top Makefile
114$(CURDIR)/Makefile Makefile: ;
115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116ifneq ($(KBUILD_OUTPUT),)
117# Invoke a second make in the output directory, passing relevant variables
118# check that the output directory actually exists
119saved-output := $(KBUILD_OUTPUT)
120KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
121$(if $(KBUILD_OUTPUT),, \
122 $(error output directory "$(saved-output)" does not exist))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
Milton Miller0b357862007-09-21 18:09:02 -0500124PHONY += $(MAKECMDGOALS) sub-make
125
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100126$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Milton Miller0b357862007-09-21 18:09:02 -0500127 $(Q)@:
128
129sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200130 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
131 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500132 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
133 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135# Leave processing to above invocation of make
136skip-makefile := 1
137endif # ifneq ($(KBUILD_OUTPUT),)
138endif # ifeq ($(KBUILD_SRC),)
139
140# We process the rest of the Makefile if this is the final invocation of make
141ifeq ($(skip-makefile),)
142
143# If building an external module we do not care about the all: rule
144# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500145PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146ifeq ($(KBUILD_EXTMOD),)
147_all: all
148else
149_all: modules
150endif
151
152srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153objtree := $(CURDIR)
154src := $(srctree)
155obj := $(objtree)
156
Mattia Dongili0f558c32006-02-19 13:50:37 +0100157VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
Amerigo Wang11294232009-06-19 03:40:26 -0400159export srctree objtree VPATH
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
162# SUBARCH tells the usermode build what the underlying arch is. That is set
163# first, and if a usermode build is happening, the "ARCH=um" on the command
164# line overrides the setting of ARCH below. If a native build is happening,
165# then ARCH is assigned, getting whatever value it gets normally, and
166# SUBARCH is subsequently ignored.
167
168SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
169 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800170 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Paul Mundt3cc000b2009-04-11 08:39:27 +0900172 -e s/sh[234].*/sh/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
174# Cross compiling and selecting different set of gcc/bin-utils
175# ---------------------------------------------------------------------------
176#
177# When performing cross compilation for other architectures ARCH shall be set
178# to the target architecture. (See arch/* for the possibilities).
179# ARCH can be set during invocation of make:
180# make ARCH=ia64
181# Another way is to have ARCH set in the environment.
182# The default ARCH is the host where make is executed.
183
184# CROSS_COMPILE specify the prefix used for all executables used
185# during compilation. Only gcc and related bin-utils executables
186# are prefixed with $(CROSS_COMPILE).
187# CROSS_COMPILE can be set on the command line
188# make CROSS_COMPILE=ia64-linux-
189# Alternatively CROSS_COMPILE can be set in the environment.
Roland McGrath84336462009-12-21 16:24:06 -0800190# A third alternative is to store a setting in .config so that plain
191# "make" in the configured kernel build directory always uses that.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192# Default value for CROSS_COMPILE is not to prefix executables
193# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg4ce6efe2008-03-23 21:38:54 +0100194export KBUILD_BUILDHOST := $(SUBARCH)
Sam Ravnborg2331d1a2009-10-11 23:22:58 +0200195ARCH ?= $(SUBARCH)
Roland McGrath84336462009-12-21 16:24:06 -0800196CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
198# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200199UTS_MACHINE := $(ARCH)
200SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201
Sam Ravnborgd746d642007-11-12 20:14:19 +0100202# Additional ARCH settings for x86
203ifeq ($(ARCH),i386)
204 SRCARCH := x86
205endif
206ifeq ($(ARCH),x86_64)
207 SRCARCH := x86
208endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200209
Sam Ravnborg5e538792008-12-02 23:17:12 -0800210# Additional ARCH settings for sparc
Namhyung Kime69f58c2010-10-25 05:48:23 +0000211ifeq ($(ARCH),sparc32)
212 SRCARCH := sparc
213endif
Sam Ravnborga439fe52008-07-27 23:00:59 +0200214ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800215 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200216endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200217
Paul Mundt3cc000b2009-04-11 08:39:27 +0900218# Additional ARCH settings for sh
219ifeq ($(ARCH),sh64)
220 SRCARCH := sh
221endif
222
Sam Ravnborg5e538792008-12-02 23:17:12 -0800223# Where to locate arch specific headers
224hdr-arch := $(SRCARCH)
225
Sam Ravnborg49148022009-01-16 21:58:10 +1000226ifeq ($(ARCH),m68knommu)
227 hdr-arch := m68k
228endif
229
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700230KCONFIG_CONFIG ?= .config
Ben Gardiner41263fc2010-12-14 11:39:44 -0500231export KCONFIG_CONFIG
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700232
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233# SHELL used by kbuild
234CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
235 else if [ -x /bin/bash ]; then echo /bin/bash; \
236 else echo sh; fi ; fi)
237
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200238HOSTCC = gcc
239HOSTCXX = g++
Josh Triplett25583d42009-11-15 14:38:47 -0800240HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200241HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200243# Decide whether to build built-in, modular, or both.
244# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
246KBUILD_MODULES :=
247KBUILD_BUILTIN := 1
248
249# If we have only "make modules", don't compile built-in objects.
250# When we're building modules with modversions, we need to consider
251# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200252# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
254ifeq ($(MAKECMDGOALS),modules)
255 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
256endif
257
258# If we have "make <whatever> modules", compile modules
259# in addition to whatever we do anyway.
260# Just "make" or "make all" shall build modules as well
261
262ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
263 KBUILD_MODULES := 1
264endif
265
266ifeq ($(MAKECMDGOALS),)
267 KBUILD_MODULES := 1
268endif
269
Sam Ravnborge579d352005-07-27 08:10:10 +0200270export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
272
273# Beautify output
274# ---------------------------------------------------------------------------
275#
276# Normally, we echo the whole command before executing it. By making
277# that echo $($(quiet)$(cmd)), we now have the possibility to set
278# $(quiet) to choose other forms of output instead, e.g.
279#
280# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
281# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
282#
283# If $(quiet) is empty, the whole command will be printed.
284# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200285# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286# the variable $(silent_cmd_cc_o_c) doesn't exist.
287#
Adrian Bunka58a4142006-01-10 00:08:17 +0100288# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289# for commands that shall be hidden in non-verbose mode.
290#
291# $(Q)ln $@ :<
292#
293# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
294# If KBUILD_VERBOSE equals 1 then the above command is displayed.
295
296ifeq ($(KBUILD_VERBOSE),1)
297 quiet =
298 Q =
299else
300 quiet=quiet_
301 Q = @
302endif
303
304# If the user is running make -s (silent mode), suppress echoing of
305# commands
306
307ifneq ($(findstring s,$(MAKEFLAGS)),)
308 quiet=silent_
309endif
310
311export quiet Q KBUILD_VERBOSE
312
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313
314# Look for make include files relative to root of kernel src
315MAKEFLAGS += --include-dir=$(srctree)
316
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100317# We need some generic definitions (do not try to remake the file).
318$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800319include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
321# Make variables (CC, etc...)
322
323AS = $(CROSS_COMPILE)as
324LD = $(CROSS_COMPILE)ld
325CC = $(CROSS_COMPILE)gcc
326CPP = $(CC) -E
327AR = $(CROSS_COMPILE)ar
328NM = $(CROSS_COMPILE)nm
329STRIP = $(CROSS_COMPILE)strip
330OBJCOPY = $(CROSS_COMPILE)objcopy
331OBJDUMP = $(CROSS_COMPILE)objdump
332AWK = awk
333GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200334INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335DEPMOD = /sbin/depmod
336KALLSYMS = scripts/kallsyms
337PERL = perl
338CHECK = sparse
339
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100340CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
341 -Wbitwise -Wno-return-void $(CF)
Sam Ravnborg65881692010-07-28 17:33:09 +0200342CFLAGS_MODULE =
343AFLAGS_MODULE =
344LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345CFLAGS_KERNEL =
346AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700347CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
349
350# Use LINUXINCLUDE when you must reference the include/ directory.
351# Needed to be compatible with the O= option
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200352LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include \
353 -Iarch/$(hdr-arch)/include/generated -Iinclude \
Sam Ravnborg96f13042009-10-17 22:33:27 +0200354 $(if $(KBUILD_SRC), -I$(srctree)/include) \
Sam Ravnborg264a2682009-10-18 00:49:24 +0200355 -include include/generated/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100357KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200359KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700360 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300361 -Werror-implicit-function-declaration \
Eugene Teoa3ca86a2009-07-15 14:59:10 +0800362 -Wno-format-security \
363 -fno-delete-null-pointer-checks
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200364KBUILD_AFLAGS_KERNEL :=
365KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg222d3942007-10-15 21:59:31 +0200366KBUILD_AFLAGS := -D__ASSEMBLY__
Sam Ravnborg65881692010-07-28 17:33:09 +0200367KBUILD_AFLAGS_MODULE := -DMODULE
368KBUILD_CFLAGS_MODULE := -DMODULE
369KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700371# Read KERNELRELEASE from include/config/kernel.release (if it exists)
372KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100373KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100374
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200375export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100376export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200377export CPP AR NM STRIP OBJCOPY OBJDUMP
378export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200379export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
Sam Ravnborg06c50402007-10-15 22:17:25 +0200381export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700382export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200383export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Sam Ravnborg65881692010-07-28 17:33:09 +0200384export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200385export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
Michal Marek40df7592011-04-20 13:45:30 +0200386export KBUILD_ARFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
388# When compiling out-of-tree modules, put MODVERDIR in the module
389# tree rather than in the kernel tree. The kernel tree might
390# even be read-only.
391export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
392
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393# Files to ignore in find ... statements
394
Trond Myklebust406119f2005-10-27 14:46:53 -0400395RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
396export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397
398# ===========================================================================
399# Rules shared between *config targets and build targets
400
401# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500402PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403scripts_basic:
404 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500405 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200407# To avoid any implicit rule to kick in, define an empty command.
408scripts/basic/%: scripts_basic ;
409
Paul Smith4f193362006-03-05 17:14:10 -0500410PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200411# outputmakefile generates a Makefile in the output directory, if using a
412# separate output directory. This allows convenient use of make in the
413# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200415ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100416 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200417 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
418 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
419endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200421# Support for using generic headers in asm-generic
422PHONY += asm-generic
423asm-generic:
424 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
425 obj=arch/$(SRCARCH)/include/generated/asm
426
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427# To make sure we do not include .config for any of the *config targets
428# catch them early, and hand them over to scripts/kconfig/Makefile
429# It is allowed to specify more targets when calling make, including
430# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200431# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432# Detect when mixed targets is specified, and make a second invocation
433# of make so .config is not included in this case either (for *config).
434
Roman Zippel3eb3c742007-01-10 14:45:28 +0100435no-dot-config-targets := clean mrproper distclean \
Jianbin Kangf4ed1002011-01-14 20:07:05 +0800436 cscope gtags TAGS tags help %docs check% coccicheck \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100437 include/linux/version.h headers_% \
Linus Torvalds4aed2fd2010-08-06 09:30:52 -0700438 kernelversion %src-pkg
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
440config-targets := 0
441mixed-targets := 0
442dot-config := 1
443
444ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
445 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
446 dot-config := 0
447 endif
448endif
449
450ifeq ($(KBUILD_EXTMOD),)
451 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
452 config-targets := 1
453 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
454 mixed-targets := 1
455 endif
456 endif
457endif
458
459ifeq ($(mixed-targets),1)
460# ===========================================================================
461# We're called with mixed targets (*config and build targets).
462# Handle them one by one.
463
464%:: FORCE
465 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
466
467else
468ifeq ($(config-targets),1)
469# ===========================================================================
470# *config targets only - make sure prerequisites are updated, and descend
471# in scripts/kconfig to make the *config target
472
473# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
474# KBUILD_DEFCONFIG may point out an alternative default configuration
475# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200476include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400477export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100479config: scripts_basic outputmakefile FORCE
480 $(Q)mkdir -p include/linux include/config
481 $(Q)$(MAKE) $(build)=scripts/kconfig $@
482
483%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700484 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 $(Q)$(MAKE) $(build)=scripts/kconfig $@
486
487else
488# ===========================================================================
489# Build targets only - this includes vmlinux, arch specific targets, clean
490# targets and others. In general all targets except *config targets.
491
492ifeq ($(KBUILD_EXTMOD),)
493# Additional helpers built in scripts/
494# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200495# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500496PHONY += scripts
Michal Marekbc081dd2009-12-07 16:38:33 +0100497scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 $(Q)$(MAKE) $(build)=$(@)
499
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500# Objects we will link into vmlinux / subdirs we need to visit
501init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100502drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503net-y := net/
504libs-y := lib/
505core-y := usr/
506endif # KBUILD_EXTMOD
507
508ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200509# Read in config
510-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200512ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513# Read in dependencies to all Kconfig* files, make sure to run
514# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700515-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700518$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519
Roman Zippelc955cca2006-06-08 22:12:39 -0700520# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100521# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200522# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100523# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100524include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
526else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200527# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200528# but do not care if they are up-to-date. Use auto.conf to trigger the test
529PHONY += include/config/auto.conf
530
531include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200532 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200533 echo; \
534 echo " ERROR: Kernel configuration is invalid."; \
Sam Ravnborg264a2682009-10-18 00:49:24 +0200535 echo " include/generated/autoconf.h or $@ are missing.";\
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200536 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
537 echo; \
538 /bin/false)
539
540endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700541
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542else
543# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700544include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200545endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
547# The all: target is the default when no target is given on the
548# command line.
549# This allow a user to issue only 'make' to build a kernel including modules
Michal Marekc8447162010-06-03 10:54:58 +0200550# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551all: vmlinux
552
553ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200554KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200556KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557endif
558
Ralf Baechlebef5b542008-07-16 13:02:24 +0100559include $(srctree)/arch/$(SRCARCH)/Makefile
560
Mike Frysinger08f67462009-06-04 16:29:08 -0700561ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100562KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
563endif
564
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100565# Force gcc to behave correct even for buggy distributions
Tejun Heo5d707e92009-02-09 22:17:39 +0900566ifndef CONFIG_CC_STACKPROTECTOR
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100567KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900568endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100569
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400570# This warning generated too much noise in a regular build.
571# Use make W=1 to enable this warning (see scripts/Makefile.build)
Michal Marek8417da6f2011-05-02 12:51:15 +0200572KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400573
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200575KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100577# Some targets (ARM with Thumb2, for example), can't be built with frame
578# pointers. For those, we don't have FUNCTION_TRACER automatically
579# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
580# incompatible with -fomit-frame-pointer with current GCC, so we don't use
581# -fomit-frame-pointer with FUNCTION_TRACER.
582ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200583KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100585endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586
587ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200588KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200589KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590endif
591
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200592ifdef CONFIG_DEBUG_INFO_REDUCED
593KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly)
594endif
595
Steven Rostedt606576c2008-10-06 19:06:12 -0400596ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200597KBUILD_CFLAGS += -pg
Steven Rostedt72441cb2010-10-13 17:12:30 -0400598ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedtcf4db252010-10-14 23:32:44 -0400599 ifdef CONFIG_HAVE_C_RECORDMCOUNT
Steven Rostedt72441cb2010-10-13 17:12:30 -0400600 BUILD_C_RECORDMCOUNT := y
601 export BUILD_C_RECORDMCOUNT
602 endif
603endif
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200604endif
605
Sam Ravnborg91341d42008-01-21 21:31:44 +0100606# We trigger additional mismatches with less inlining
607ifdef CONFIG_DEBUG_SECTION_MISMATCH
608KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
609endif
610
Sam Ravnborge8e69932005-04-30 16:51:42 -0700611# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700612NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700613CHECKFLAGS += $(NOSTDINC_FLAGS)
614
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200616KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200618# disable pointer signed / unsigned warnings in gcc 4.0
Michal Marek8417da6f2011-05-02 12:51:15 +0200619KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400621# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700622KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700623
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700624# conserve stack if available
625KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
626
Michal Marek40df7592011-04-20 13:45:30 +0200627# use the deterministic mode of AR if available
628KBUILD_ARFLAGS := $(call ar-option,D)
629
Jason Baronbf5438fc2010-09-17 11:09:00 -0400630# check for 'asm goto'
631ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
632 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
633endif
634
Sam Ravnborg06c50402007-10-15 22:17:25 +0200635# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100636# But warn user when we do so
637warn-assign = \
638$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
639
640ifneq ($(KCPPFLAGS),)
641 $(call warn-assign,CPPFLAGS)
642 KBUILD_CPPFLAGS += $(KCPPFLAGS)
643endif
644ifneq ($(KAFLAGS),)
645 $(call warn-assign,AFLAGS)
646 KBUILD_AFLAGS += $(KAFLAGS)
647endif
648ifneq ($(KCFLAGS),)
649 $(call warn-assign,CFLAGS)
650 KBUILD_CFLAGS += $(KCFLAGS)
651endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200652
Roland McGrath18991192007-07-19 01:48:40 -0700653# Use --build-id when available.
654LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200655 $(call cc-ldoption, -Wl$(comma)--build-id,))
Sam Ravnborg65881692010-07-28 17:33:09 +0200656KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath18991192007-07-19 01:48:40 -0700657LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
658
David Howells5d7d18f2009-03-04 11:59:07 -0800659ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200660LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800661endif
662
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200664# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665# set in the environment
666# Also any assignments in arch/$(ARCH)/Makefile take precedence over
667# this default value
668export KBUILD_IMAGE ?= vmlinux
669
670#
671# INSTALL_PATH specifies where to place the updated kernel and system map
672# images. Default is /boot, but you can set it to other values
673export INSTALL_PATH ?= /boot
674
675#
676# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
677# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200678# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679#
680
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100681MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682export MODLIB
683
Theodore Ts'oac031f22006-06-21 20:53:09 -0400684#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100685# INSTALL_MOD_STRIP, if defined, will cause modules to be
686# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
687# the default option --strip-debug will be used. Otherwise,
Gilles Espinasse177b2412011-01-09 08:59:49 +0100688# INSTALL_MOD_STRIP value will be used as the options to the strip command.
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100689
Theodore Ts'oac031f22006-06-21 20:53:09 -0400690ifdef INSTALL_MOD_STRIP
691ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100692mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400693else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100694mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400695endif # INSTALL_MOD_STRIP=1
696else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100697mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400698endif # INSTALL_MOD_STRIP
699export mod_strip_cmd
700
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701
702ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100703core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704
705vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
706 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
707 $(net-y) $(net-m) $(libs-y) $(libs-m)))
708
709vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
710 $(init-n) $(init-) \
711 $(core-n) $(core-) $(drivers-n) $(drivers-) \
712 $(net-n) $(net-) $(libs-n) $(libs-))))
713
714init-y := $(patsubst %/, %/built-in.o, $(init-y))
715core-y := $(patsubst %/, %/built-in.o, $(core-y))
716drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
717net-y := $(patsubst %/, %/built-in.o, $(net-y))
718libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
719libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
720libs-y := $(libs-y1) $(libs-y2)
721
722# Build vmlinux
723# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200724# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200726# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727# Ordering when linking is important, and $(vmlinux-init) must be first.
728#
729# vmlinux
730# ^
731# |
732# +-< $(vmlinux-init)
733# | +--< init/version.o + more
734# |
735# +--< $(vmlinux-main)
736# | +--< driver/built-in.o mm/built-in.o + more
737# |
738# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
739#
740# vmlinux version (uname -v) cannot be updated during normal
741# descending-into-subdirs phase since we do not yet know if we need to
742# update vmlinux.
743# Therefore this step is delayed until just before final link of vmlinux -
744# except in the kallsyms case where it is done just before adding the
745# symbols to the kernel.
746#
747# System.map is generated to document addresses of all kernel symbols
748
749vmlinux-init := $(head-y) $(init-y)
750vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
751vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200752vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100753export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754
755# Rule to link vmlinux - also used during CONFIG_KALLSYMS
756# May be overridden by arch/$(ARCH)/Makefile
757quiet_cmd_vmlinux__ ?= LD $@
758 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
759 -T $(vmlinux-lds) $(vmlinux-init) \
760 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200761 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762
763# Generate new vmlinux version
764quiet_cmd_vmlinux_version = GEN .version
765 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200766 if [ ! -r .version ]; then \
767 rm -f .version; \
768 echo 1 >.version; \
769 else \
770 mv .version .old_version; \
771 expr 0$$(cat .old_version) + 1 >.version; \
772 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 $(MAKE) $(build)=init
774
775# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200776quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
778
779# Link of vmlinux
780# If CONFIG_KALLSYMS is set .version is already updated
781# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700782# Use + in front of the vmlinux_version rule to silent warning with make -j2
783# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700785 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
787
788 $(call cmd,vmlinux__)
789 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
790
Sam Ravnborg46352812006-08-08 21:41:18 +0200791 $(Q)$(if $($(quiet)cmd_sysmap), \
792 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
793 $(cmd_sysmap) $@ System.map; \
794 if [ $$? -ne 0 ]; then \
795 rm -f $@; \
796 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 fi;
798 $(verify_kallsyms)
799endef
800
801
802ifdef CONFIG_KALLSYMS
803# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
804# It's a three stage process:
805# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
806# empty
807# Running kallsyms on that gives us .tmp_kallsyms1.o with
808# the right size - vmlinux version (uname -v) is updated during this step
809# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
810# but due to the added section, some addresses have shifted.
811# From here, we generate a correct .tmp_kallsyms2.o
812# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
813# o Verify that the System.map from vmlinux matches the map from
814# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
Artem Bityutskiy1e2795a2011-04-05 13:24:58 +0300815# o If 'make KALLSYMS_EXTRA_PASS=1" was used, do an extra pass using
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
817# temporary bypass to allow the kernel to be built while the
818# maintainers work out what went wrong with kallsyms.
819
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820last_kallsyms := 2
Artem Bityutskiy1e2795a2011-04-05 13:24:58 +0300821
822ifdef KALLSYMS_EXTRA_PASS
823ifneq ($(KALLSYMS_EXTRA_PASS),0)
824last_kallsyms := 3
825endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826endif
827
828kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
829
830define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200831 $(Q)$(if $($(quiet)cmd_sysmap), \
832 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200834 $(Q)cmp -s System.map .tmp_System.map || \
835 (echo Inconsistent kallsyms data; \
Artem Bityutskiy1e2795a2011-04-05 13:24:58 +0300836 echo This is a bug - please report about it; \
837 echo Try "make KALLSYMS_EXTRA_PASS=1" as a workaround; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 rm .tmp_kallsyms* ; /bin/false )
839endef
840
841# Update vmlinux version before link
842# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200843# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844cmd_ksym_ld = $(cmd_vmlinux__)
845define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200846 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 +$(call cmd,vmlinux_version)
848 $(call cmd,vmlinux__)
849 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
850endef
851
852# Generate .S file with all kernel symbols
853quiet_cmd_kallsyms = KSYM $@
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100854 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
855 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100857.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 $(call if_changed_dep,as_o_S)
859
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100860.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 $(call cmd,kallsyms)
862
863# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100864.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
865 $(call if_changed_rule,ksym_ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100867.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
868 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100870.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
871 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872
873# Needs to visit scripts/ before $(KALLSYMS) can be used.
874$(KALLSYMS): scripts ;
875
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000876# Generate some data for debugging strange kallsyms problems
877debug_kallsyms: .tmp_map$(last_kallsyms)
878
879.tmp_map%: .tmp_vmlinux% FORCE
880 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
881
882.tmp_map3: .tmp_map2
883
884.tmp_map2: .tmp_map1
885
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886endif # ifdef CONFIG_KALLSYMS
887
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200888# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
889# relevant sections renamed as per the linker script.
890quiet_cmd_vmlinux-modpost = LD $@
891 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
892 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200893 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200894define rule_vmlinux-modpost
895 :
896 +$(call cmd,vmlinux-modpost)
897 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
898 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
899endef
900
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100902vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700903ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100904 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700905endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700906ifdef CONFIG_SAMPLES
907 $(Q)$(MAKE) $(build)=samples
908endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700909ifdef CONFIG_BUILD_DOCSRC
910 $(Q)$(MAKE) $(build)=Documentation
911endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200912 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200914 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915
Sam Ravnborg310f8242008-01-21 22:57:09 +0100916# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100917ifdef CONFIG_KALLSYMS
918.tmp_vmlinux1: vmlinux.o
919endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200920
921modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
922vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200923 $(call if_changed_rule,vmlinux-modpost)
924
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925# The actual objects are generated when descending,
926# make sure no implicit rule kicks in
927$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
928
929# Handle descending into subdirectories listed in $(vmlinux-dirs)
930# Preset locale variables to speed up the build process. Limit locale
931# tweaks to this spot to avoid wrong language settings when running
932# make menuconfig etc.
933# Error messages still appears in the original language
934
Paul Smith4f193362006-03-05 17:14:10 -0500935PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200936$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 $(Q)$(MAKE) $(build)=$@
938
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700939# Store (new) KERNELRELASE string in include/config/kernel.release
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700940include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100941 $(Q)rm -f $@
Michal Marek7263e712010-07-05 23:43:04 +0200942 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100943
944
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200946# or the modules are listed in "prepare".
947# A multi level approach is used. prepareN is processed before prepareN-1.
948# archprepare is used in arch Makefiles and when processed asm symlink,
949# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200951# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500952PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200953
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200954# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955# and if so do:
956# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700957prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500959 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700960 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 echo " $(srctree) is not clean, please run 'make mrproper'";\
962 echo " in the '$(srctree)' directory.";\
963 /bin/false; \
964 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965endif
966
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200967# prepare2 creates a makefile if using a separate output directory
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200968prepare2: prepare3 outputmakefile asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969
Sam Ravnborg273b2812009-10-18 00:52:28 +0200970prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200971 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200972 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200974archprepare: prepare1 scripts_basic
975
976prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200977 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200978 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200979
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800981prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983# Generate some files
984# ---------------------------------------------------------------------------
985
986# KERNELRELEASE can change from a few different places, meaning version.h
987# needs to be updated, so this check is forced on all builds
988
989uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200990define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200992 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
993 exit 1; \
994 fi; \
995 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996endef
997
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200998define filechk_version.h
999 (echo \#define LINUX_VERSION_CODE $(shell \
1000 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1001 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1002endef
1003
1004include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005 $(call filechk,version.h)
1006
Sam Ravnborg273b2812009-10-18 00:52:28 +02001007include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001008 $(call filechk,utsrelease.h)
1009
Vegard Nossum179efcb2008-12-16 12:33:43 +01001010PHONY += headerdep
1011headerdep:
1012 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1013
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014# ---------------------------------------------------------------------------
1015
Paul Smith4f193362006-03-05 17:14:10 -05001016PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017depend dep:
1018 @echo '*** Warning: make $@ is unnecessary now.'
1019
1020# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001021# Firmware install
1022INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1023export INSTALL_FW_PATH
1024
1025PHONY += firmware_install
1026firmware_install: FORCE
1027 @mkdir -p $(objtree)/firmware
1028 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1029
1030# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001031# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001032
Sam Ravnborge6883b12008-06-05 16:43:46 +02001033#Default location for installed headers
1034export INSTALL_HDR_PATH = $(objtree)/usr
1035
Sam Ravnborge6883b12008-06-05 16:43:46 +02001036hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001037
1038# If we do an all arch process set dst to asm-$(hdr-arch)
1039hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001040
1041PHONY += __headers
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +02001042__headers: include/linux/version.h scripts_basic asm-generic FORCE
Mike Waychisone1b702c2011-03-14 23:34:25 -07001043 $(Q)$(MAKE) $(build)=scripts build_unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001044
1045PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001046headers_install_all:
1047 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001048
David Woodhouse8d730cf2006-06-18 11:58:39 +01001049PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001050headers_install: __headers
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001051 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001052 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001053 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001054 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001055
Mike Frysinger1f857122007-02-14 00:33:02 -08001056PHONY += headers_check_all
1057headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001058 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001059
David Woodhouse68475352006-06-18 12:02:10 +01001060PHONY += headers_check
1061headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001062 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001063 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001064
David Woodhouse8d730cf2006-06-18 11:58:39 +01001065# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066# Modules
1067
1068ifdef CONFIG_MODULES
1069
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001070# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071
Michal Marek73d13932010-03-10 12:28:58 +01001072all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073
1074# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001075#
1076# A module can be listed more than once in obj-m resulting in
1077# duplicate lines in modules.order files. Those are removed
1078# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079
Paul Smith4f193362006-03-05 17:14:10 -05001080PHONY += modules
Michal Marek2da30e72010-06-07 22:22:12 +02001081modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo551559e2007-12-07 21:04:30 +09001082 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001083 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001084 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001085 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086
Michal Mareka6c36632010-03-08 10:07:12 +01001087modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1088 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1089
Michal Marek73d13932010-03-10 12:28:58 +01001090%/modules.builtin: include/config/auto.conf
Michal Mareka6c36632010-03-08 10:07:12 +01001091 $(Q)$(MAKE) $(modbuiltin)=$*
1092
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093
1094# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001095PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001096modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097
1098# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001099PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100modules_install: _modinst_ _modinst_post
1101
Paul Smith4f193362006-03-05 17:14:10 -05001102PHONY += _modinst_
Michal Marek2da30e72010-06-07 22:22:12 +02001103_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001104 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 echo "Warning: you may need to install module-init-tools"; \
1106 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1107 sleep 1; \
1108 fi
1109 @rm -rf $(MODLIB)/kernel
1110 @rm -f $(MODLIB)/source
1111 @mkdir -p $(MODLIB)/kernel
1112 @ln -s $(srctree) $(MODLIB)/source
1113 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1114 rm -f $(MODLIB)/build ; \
1115 ln -s $(objtree) $(MODLIB)/build ; \
1116 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001117 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001118 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001119 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001121# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122# boot a modules.dep even before / is mounted read-write. However the
1123# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001124PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001126 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001127 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128
1129else # CONFIG_MODULES
1130
1131# Modules not configured
1132# ---------------------------------------------------------------------------
1133
1134modules modules_install: FORCE
1135 @echo
1136 @echo "The present kernel configuration has modules disabled."
1137 @echo "Type 'make config' and enable loadable module support."
1138 @echo "Then build a kernel with module support enabled."
1139 @echo
1140 @exit 1
1141
1142endif # CONFIG_MODULES
1143
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144###
1145# Cleaning is done on three levels.
1146# make clean Delete most generated files
1147# Leave enough to build external modules
1148# make mrproper Delete the current configuration, and all generated files
1149# make distclean Remove editor backup files, patch leftover files and the like
1150
1151# Directories & files removed with 'make clean'
1152CLEAN_DIRS += $(MODVERDIR)
1153CLEAN_FILES += vmlinux System.map \
1154 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1155
1156# Directories & files removed with 'make mrproper'
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +02001157MRPROPER_DIRS += include/config usr/include include/generated \
1158 arch/*/include/generated
Sam Ravnborgf7f16b72009-10-18 00:00:43 +02001159MRPROPER_FILES += .config .config.old .version .old_version \
Sam Ravnborg264a2682009-10-18 00:49:24 +02001160 include/linux/version.h \
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001161 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162
1163# clean - Delete most, but leave enough to build external modules
1164#
1165clean: rm-dirs := $(CLEAN_DIRS)
1166clean: rm-files := $(CLEAN_FILES)
Michal Marekc47f2142010-09-03 15:00:22 +02001167clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168
Paul Smith4f193362006-03-05 17:14:10 -05001169PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170$(clean-dirs):
1171 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1172
Michal Marek88d7be02010-09-06 12:00:08 +02001173clean: archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174
1175# mrproper - Delete all generated files, including .config
1176#
1177mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1178mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1179mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1180
Paul Smith4f193362006-03-05 17:14:10 -05001181PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182$(mrproper-dirs):
1183 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1184
1185mrproper: clean archmrproper $(mrproper-dirs)
1186 $(call cmd,rmdirs)
1187 $(call cmd,rmfiles)
1188
1189# distclean
1190#
Paul Smith4f193362006-03-05 17:14:10 -05001191PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192
1193distclean: mrproper
1194 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001195 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001197 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1199 -type f -print | xargs rm -f
1200
1201
1202# Packaging of the kernel to various formats
1203# ---------------------------------------------------------------------------
1204# rpm target kept for backward compatibility
1205package-dir := $(srctree)/scripts/package
1206
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -03001207%src-pkg: FORCE
1208 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001209%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001210 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001211rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001212 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213
1214
1215# Brief documentation of the typical targets used
1216# ---------------------------------------------------------------------------
1217
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001218boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001220board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1221board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222
1223help:
1224 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001225 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001226 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001227 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001228 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229 @echo ''
1230 @echo 'Configuration targets:'
1231 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1232 @echo ''
1233 @echo 'Other generic targets:'
1234 @echo ' all - Build all targets marked with [*]'
1235 @echo '* vmlinux - Build the bare kernel'
1236 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001237 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001238 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1239 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 @echo ' dir/ - Build all files in dir and below'
Joe Perches62718972010-01-13 09:31:44 -08001241 @echo ' dir/file.[oisS] - Build specified target only'
1242 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1243 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001244 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001245 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 @echo ' tags/TAGS - Generate tags file for editors'
1247 @echo ' cscope - Generate cscope index'
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001248 @echo ' gtags - Generate GNU GLOBAL index'
Zach Brown6d128842005-09-07 12:08:23 -07001249 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001250 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001251 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001252 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001253 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255 @echo ' checkstack - Generate a list of stack hogs'
1256 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001257 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001258 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001259 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001260 @echo ' headers_check - Sanity check on exported headers'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001261 @echo ' headerdep - Detect inclusion cycles in headers'
1262 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1263 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001265 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 @echo ''
1267 @echo 'Documentation targets:'
1268 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1269 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001270 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001272 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273 @echo ''
1274 @$(if $(boards), \
1275 $(foreach b, $(boards), \
1276 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1277 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001278 @$(if $(board-dirs), \
1279 $(foreach b, $(board-dirs), \
1280 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1281 printf " %-16s - Show all of the above\\n" help-boards; \
1282 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283
1284 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001285 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001287 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1288 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Sam Ravnborg28bc20d2011-04-27 22:15:27 +02001289 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1290 @echo ' 1: warnings which may be relevant and do not occur too often'
1291 @echo ' 2: warnings which occur quite often but may still be relevant'
1292 @echo ' 3: more obscure warnings, can most likely be ignored'
Michal Mareka6de5532011-04-29 14:45:31 +02001293 @echo ' Multiple levels can be combined with W=12 or W=123'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294 @echo ''
1295 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1296 @echo 'For further info see the ./README file'
1297
1298
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001299help-board-dirs := $(addprefix help-,$(board-dirs))
1300
1301help-boards: $(help-board-dirs)
1302
1303boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1304
1305$(help-board-dirs): help-%:
1306 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1307 @$(if $(boards-per-dir), \
1308 $(foreach b, $(boards-per-dir), \
1309 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1310 echo '')
1311
1312
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313# Documentation targets
1314# ---------------------------------------------------------------------------
1315%docs: scripts_basic FORCE
Peter Foleybffd2022011-05-02 22:48:03 +02001316 $(Q)$(MAKE) $(build)=scripts build_docproc
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1318
1319else # KBUILD_EXTMOD
1320
1321###
1322# External module support.
1323# When building external modules the kernel used as basis is considered
1324# read-only, and no consistency checks are made and the make
1325# system is not used on the basis kernel. If updates are required
1326# in the basis kernel ordinary make commands (without M=...) must
1327# be used.
1328#
1329# The following are the only valid targets when building external
1330# modules.
1331# make M=dir clean Delete all automatically generated files
1332# make M=dir modules Make all modules in specified dir
1333# make M=dir Same as 'make M=dir modules'
1334# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001335# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336# Assumes install directory is already created
1337
1338# We are always building modules
1339KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001340PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001342 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343
Paul Smith4f193362006-03-05 17:14:10 -05001344PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345$(objtree)/Module.symvers:
1346 @test -e $(objtree)/Module.symvers || ( \
1347 echo; \
1348 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1349 echo " is missing; modules will have no dependencies and modversions."; \
1350 echo )
1351
1352module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001353PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354$(module-dirs): crmodverdir $(objtree)/Module.symvers
1355 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1356
1357modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001358 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001359 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360
Paul Smith4f193362006-03-05 17:14:10 -05001361PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001362modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001363
Paul Smith4f193362006-03-05 17:14:10 -05001364install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1365PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001366_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001367 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001368 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369
Paul Smith4f193362006-03-05 17:14:10 -05001370PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001371_emodinst_post: _emodinst_
1372 $(call cmd,depmod)
1373
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1375
Paul Smith4f193362006-03-05 17:14:10 -05001376PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377$(clean-dirs):
1378 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1379
1380clean: rm-dirs := $(MODVERDIR)
Michal Marek88d7be02010-09-06 12:00:08 +02001381clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382
1383help:
1384 @echo ' Building external modules.'
1385 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1386 @echo ''
1387 @echo ' modules - default target, build the module(s)'
1388 @echo ' modules_install - install the module'
1389 @echo ' clean - remove generated files in module directory only'
1390 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001391
1392# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001393PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001394prepare: ;
1395scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396endif # KBUILD_EXTMOD
1397
Michal Marek88d7be02010-09-06 12:00:08 +02001398clean: $(clean-dirs)
1399 $(call cmd,rmdirs)
1400 $(call cmd,rmfiles)
Kevin Cernekee43f67c92011-05-10 15:47:16 -07001401 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
Michal Marek88d7be02010-09-06 12:00:08 +02001402 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1403 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1404 -o -name '*.symtypes' -o -name 'modules.order' \
1405 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1406 -o -name '*.gcno' \) -type f -print | xargs rm -f
1407
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408# Generate tags for editors
1409# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001410quiet_cmd_tags = GEN $@
1411 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001413tags TAGS cscope gtags: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414 $(call cmd,tags)
1415
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416# Scripts to check various things for consistency
1417# ---------------------------------------------------------------------------
1418
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419includecheck:
1420 find * $(RCS_FIND_IGNORE) \
1421 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001422 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423
1424versioncheck:
1425 find * $(RCS_FIND_IGNORE) \
1426 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001427 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428
Nicolas Palix74425ee2010-06-06 17:15:01 +02001429coccicheck:
1430 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1431
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432namespacecheck:
1433 $(PERL) $(srctree)/scripts/namespace.pl
1434
Adrian Bunk295ac052007-08-24 23:04:56 +02001435export_report:
1436 $(PERL) $(srctree)/scripts/export_report.pl
1437
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438endif #ifeq ($(config-targets),1)
1439endif #ifeq ($(mixed-targets),1)
1440
Roman Zippelc30a02e2006-06-08 22:12:50 -07001441PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001442
Jeff Dike011e3a92006-12-13 00:34:12 -08001443# UML needs a little special treatment here. It wants to use the host
1444# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1445# else wants $(ARCH), including people doing cross-builds, which means
1446# that $(SUBARCH) doesn't work here.
1447ifeq ($(ARCH), um)
1448CHECKSTACK_ARCH := $(SUBARCH)
1449else
1450CHECKSTACK_ARCH := $(ARCH)
1451endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452checkstack:
1453 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001454 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455
Amerigo Wang7b8ea532010-08-20 05:36:06 -04001456kernelrelease:
1457 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
Amerigo Wang01ab1782010-06-28 10:45:21 +08001458
Sam Ravnborgcb584552006-01-09 21:20:34 +01001459kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001460 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461
Sam Ravnborg06300b22006-01-25 07:13:18 +01001462# Single targets
1463# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001464# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001465# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001466# - build with separate output dir 'make O=...'
1467# - external modules
1468#
1469# target-dir => where to store outputfile
1470# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001471
Sam Ravnborg06300b22006-01-25 07:13:18 +01001472ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001473 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001474 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001475else
1476 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001477 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1478 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001479endif
1480
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001481%.s: %.c prepare scripts FORCE
1482 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1483%.i: %.c prepare scripts FORCE
1484 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1485%.o: %.c prepare scripts FORCE
1486 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1487%.lst: %.c prepare scripts FORCE
1488 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1489%.s: %.S prepare scripts FORCE
1490 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1491%.o: %.S prepare scripts FORCE
1492 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001493%.symtypes: %.c prepare scripts FORCE
1494 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001495
1496# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001497/: prepare scripts FORCE
1498 $(cmd_crmodverdir)
1499 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1500 $(build)=$(build-dir)
1501%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001502 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001503 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001504 $(build)=$(build-dir)
1505%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001506 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001507 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001508 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001509 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001510
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511# FIXME Should go into a make.lib or something
1512# ===========================================================================
1513
1514quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1515 cmd_rmdirs = rm -rf $(rm-dirs)
1516
1517quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1518 cmd_rmfiles = rm -f $(rm-files)
1519
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001520# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001521quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1522 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001523 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001524 $(DEPMOD) -ae -F System.map \
Gilles Espinasse75bccd82009-03-07 13:57:25 +01001525 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001526 $(KERNELRELEASE); \
1527 fi
1528
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001529# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001530# clean it up only when building all modules
1531cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1532 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533
Sam Ravnborg222d3942007-10-15 21:59:31 +02001534a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborg80c00ba2010-07-28 19:11:27 +02001535 $(KBUILD_AFLAGS_KERNEL) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +01001536 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001537 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538
1539quiet_cmd_as_o_S = AS $@
1540cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1541
1542# read all saved command lines
1543
1544targets := $(wildcard $(sort $(targets)))
1545cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1546
1547ifneq ($(cmd_files),)
1548 $(cmd_files): ; # Do not try to update included dependency files
1549 include $(cmd_files)
1550endif
1551
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1553# Usage:
1554# $(Q)$(MAKE) $(clean)=dir
1555clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1556
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557endif # skip-makefile
1558
Paul Smith4f193362006-03-05 17:14:10 -05001559PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001561
Paul Smith4f193362006-03-05 17:14:10 -05001562# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001563# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001564.PHONY: $(PHONY)