[1765] | 1 | VERSION = 1
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[2725] | 2 | PATCHLEVEL = 18
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[1772] | 3 | SUBLEVEL = 3
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[2823] | 4 | EXTRAVERSION = -rPBREV
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[1765] | 5 | NAME = Unnamed
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| 6 |
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| 7 | # *DOCUMENTATION*
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| 8 | # To see a list of typical targets execute "make help"
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| 9 | # More info can be located in ./README
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| 10 | # Comments in this file are targeted only to the developer, do not
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| 11 | # expect to learn how to build the kernel reading this file.
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| 12 |
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| 13 | # Do not print "Entering directory ..."
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| 14 | MAKEFLAGS += --no-print-directory
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| 15 |
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| 16 | # We are using a recursive build, so we need to do a little thinking
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| 17 | # to get the ordering right.
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[821] | 18 | #
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[1765] | 19 | # Most importantly: sub-Makefiles should only ever modify files in
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| 20 | # their own directory. If in some directory we have a dependency on
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| 21 | # a file in another dir (which doesn't happen often, but it's often
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| 22 | # unavoidable when linking the built-in.o targets which finally
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| 23 | # turn into busybox), we will call a sub make in that other dir, and
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| 24 | # after that we are sure that everything which is in that other dir
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| 25 | # is now up to date.
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[821] | 26 | #
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[1765] | 27 | # The only cases where we need to modify files which have global
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| 28 | # effects are thus separated out and done before the recursive
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| 29 | # descending is started. They are now explicitly listed as the
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| 30 | # prepare rule.
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[821] | 31 |
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[1765] | 32 | # To put more focus on warnings, be less verbose as default
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| 33 | # Use 'make V=1' to see the full commands
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[821] | 34 |
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[1765] | 35 | ifdef V
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| 36 | ifeq ("$(origin V)", "command line")
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| 37 | KBUILD_VERBOSE = $(V)
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| 38 | endif
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| 39 | endif
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| 40 | ifndef KBUILD_VERBOSE
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| 41 | KBUILD_VERBOSE = 0
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| 42 | endif
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[821] | 43 |
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[1765] | 44 | # Call sparse as part of compilation of C files
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| 45 | # Use 'make C=1' to enable sparse checking
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[821] | 46 |
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[1765] | 47 | ifdef C
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| 48 | ifeq ("$(origin C)", "command line")
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| 49 | KBUILD_CHECKSRC = $(C)
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| 50 | endif
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| 51 | endif
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| 52 | ifndef KBUILD_CHECKSRC
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| 53 | KBUILD_CHECKSRC = 0
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| 54 | endif
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[821] | 55 |
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[1765] | 56 | # Use make M=dir to specify directory of external module to build
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| 57 | # Old syntax make ... SUBDIRS=$PWD is still supported
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| 58 | # Setting the environment variable KBUILD_EXTMOD take precedence
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| 59 | ifdef SUBDIRS
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| 60 | KBUILD_EXTMOD ?= $(SUBDIRS)
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[821] | 61 | endif
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[1765] | 62 | ifdef M
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| 63 | ifeq ("$(origin M)", "command line")
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| 64 | KBUILD_EXTMOD := $(M)
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| 65 | endif
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[821] | 66 | endif
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| 67 |
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| 68 |
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[1765] | 69 | # kbuild supports saving output files in a separate directory.
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| 70 | # To locate output files in a separate directory two syntaxes are supported.
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| 71 | # In both cases the working directory must be the root of the kernel src.
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| 72 | # 1) O=
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| 73 | # Use "make O=dir/to/store/output/files/"
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| 74 | #
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| 75 | # 2) Set KBUILD_OUTPUT
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| 76 | # Set the environment variable KBUILD_OUTPUT to point to the directory
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| 77 | # where the output files shall be placed.
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| 78 | # export KBUILD_OUTPUT=dir/to/store/output/files/
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| 79 | # make
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| 80 | #
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| 81 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment
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| 82 | # variable.
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[821] | 83 |
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| 84 |
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[1765] | 85 | # KBUILD_SRC is set on invocation of make in OBJ directory
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| 86 | # KBUILD_SRC is not intended to be used by the regular user (for now)
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| 87 | ifeq ($(KBUILD_SRC),)
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| 88 |
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| 89 | # OK, Make called in directory where kernel src resides
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| 90 | # Do we want to locate output files in a separate directory?
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| 91 | ifdef O
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| 92 | ifeq ("$(origin O)", "command line")
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| 93 | KBUILD_OUTPUT := $(O)
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| 94 | endif
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| 95 | endif
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| 96 |
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[821] | 97 | # That's our default target when none is given on the command line
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[1765] | 98 | PHONY := _all
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[821] | 99 | _all:
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| 100 |
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[1765] | 101 | ifneq ($(KBUILD_OUTPUT),)
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| 102 | # Invoke a second make in the output directory, passing relevant variables
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| 103 | # check that the output directory actually exists
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| 104 | saved-output := $(KBUILD_OUTPUT)
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| 105 | KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
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| 106 | $(if $(KBUILD_OUTPUT),, \
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| 107 | $(error output directory "$(saved-output)" does not exist))
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[821] | 108 |
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[1765] | 109 | PHONY += $(MAKECMDGOALS)
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| 110 |
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| 111 | $(filter-out _all,$(MAKECMDGOALS)) _all:
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| 112 | $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
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| 113 | KBUILD_SRC=$(CURDIR) \
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| 114 | KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
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| 115 |
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| 116 | # Leave processing to above invocation of make
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| 117 | skip-makefile := 1
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| 118 | endif # ifneq ($(KBUILD_OUTPUT),)
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| 119 | endif # ifeq ($(KBUILD_SRC),)
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| 120 |
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| 121 | # We process the rest of the Makefile if this is the final invocation of make
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| 122 | ifeq ($(skip-makefile),)
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| 123 |
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| 124 | # If building an external module we do not care about the all: rule
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| 125 | # but instead _all depend on modules
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| 126 | PHONY += all
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| 127 | ifeq ($(KBUILD_EXTMOD),)
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| 128 | _all: all
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[821] | 129 | else
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[1765] | 130 | _all: modules
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[821] | 131 | endif
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| 132 |
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[1765] | 133 | srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
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| 134 | TOPDIR := $(srctree)
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| 135 | # FIXME - TOPDIR is obsolete, use srctree/objtree
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| 136 | objtree := $(CURDIR)
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| 137 | src := $(srctree)
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| 138 | obj := $(objtree)
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| 139 |
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| 140 | VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
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| 141 |
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| 142 | export srctree objtree VPATH TOPDIR
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| 143 |
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| 144 |
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| 145 | # Cross compiling and selecting different set of gcc/bin-utils
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| 146 | # ---------------------------------------------------------------------------
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| 147 | #
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| 148 | # When performing cross compilation for other architectures ARCH shall be set
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| 149 | # to the target architecture. (See arch/* for the possibilities).
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| 150 | # ARCH can be set during invocation of make:
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| 151 | # make ARCH=ia64
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| 152 | # Another way is to have ARCH set in the environment.
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| 153 | # The default ARCH is the host where make is executed.
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| 154 |
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| 155 | # CROSS_COMPILE specify the prefix used for all executables used
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| 156 | # during compilation. Only gcc and related bin-utils executables
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| 157 | # are prefixed with $(CROSS_COMPILE).
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| 158 | # CROSS_COMPILE can be set on the command line
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| 159 | # make CROSS_COMPILE=ia64-linux-
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| 160 | # Alternatively CROSS_COMPILE can be set in the environment.
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| 161 | # Default value for CROSS_COMPILE is not to prefix executables
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| 162 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
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| 163 |
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[2725] | 164 | CROSS_COMPILE ?=
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| 165 | # bbox: we may have CONFIG_CROSS_COMPILER_PREFIX in .config,
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| 166 | # and it has not been included yet... thus using an awkward syntax.
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| 167 | ifeq ($(CROSS_COMPILE),)
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| 168 | CROSS_COMPILE := $(shell grep ^CONFIG_CROSS_COMPILER_PREFIX .config 2>/dev/null)
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| 169 | CROSS_COMPILE := $(subst CONFIG_CROSS_COMPILER_PREFIX=,,$(CROSS_COMPILE))
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| 170 | CROSS_COMPILE := $(subst ",,$(CROSS_COMPILE))
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| 171 | #")
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| 172 | endif
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[1765] | 173 |
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[2725] | 174 | # SUBARCH tells the usermode build what the underlying arch is. That is set
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| 175 | # first, and if a usermode build is happening, the "ARCH=um" on the command
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| 176 | # line overrides the setting of ARCH below. If a native build is happening,
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| 177 | # then ARCH is assigned, getting whatever value it gets normally, and
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| 178 | # SUBARCH is subsequently ignored.
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| 179 |
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| 180 | ifneq ($(CROSS_COMPILE),)
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| 181 | SUBARCH := $(shell echo $(CROSS_COMPILE) | cut -d- -f1)
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| 182 | else
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| 183 | SUBARCH := $(shell uname -m)
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| 184 | endif
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| 185 | SUBARCH := $(shell echo $(SUBARCH) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
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| 186 | -e s/arm.*/arm/ -e s/sa110/arm/ \
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| 187 | -e s/s390x/s390/ -e s/parisc64/parisc/ \
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| 188 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
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| 189 |
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| 190 | ARCH ?= $(SUBARCH)
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| 191 |
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[1765] | 192 | # Architecture as present in compile.h
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| 193 | UTS_MACHINE := $(ARCH)
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| 194 |
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| 195 | # SHELL used by kbuild
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| 196 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
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| 197 | else if [ -x /bin/bash ]; then echo /bin/bash; \
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| 198 | else echo sh; fi ; fi)
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| 199 |
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| 200 | # Decide whether to build built-in, modular, or both.
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| 201 | # Normally, just do built-in.
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| 202 |
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| 203 | KBUILD_MODULES :=
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| 204 | KBUILD_BUILTIN := 1
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| 205 |
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| 206 | # If we have only "make modules", don't compile built-in objects.
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| 207 | # When we're building modules with modversions, we need to consider
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| 208 | # the built-in objects during the descend as well, in order to
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| 209 | # make sure the checksums are uptodate before we record them.
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| 210 |
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| 211 | ifeq ($(MAKECMDGOALS),modules)
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| 212 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
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[821] | 213 | endif
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[1765] | 214 |
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| 215 | # If we have "make <whatever> modules", compile modules
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| 216 | # in addition to whatever we do anyway.
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| 217 | # Just "make" or "make all" shall build modules as well
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| 218 |
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| 219 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
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| 220 | KBUILD_MODULES := 1
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[821] | 221 | endif
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| 222 |
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[1765] | 223 | ifeq ($(MAKECMDGOALS),)
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| 224 | KBUILD_MODULES := 1
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[821] | 225 | endif
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| 226 |
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[1765] | 227 | export KBUILD_MODULES KBUILD_BUILTIN
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| 228 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
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| 229 |
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| 230 | # Beautify output
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| 231 | # ---------------------------------------------------------------------------
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| 232 | #
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| 233 | # Normally, we echo the whole command before executing it. By making
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| 234 | # that echo $($(quiet)$(cmd)), we now have the possibility to set
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| 235 | # $(quiet) to choose other forms of output instead, e.g.
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| 236 | #
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| 237 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
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| 238 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
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| 239 | #
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| 240 | # If $(quiet) is empty, the whole command will be printed.
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| 241 | # If it is set to "quiet_", only the short version will be printed.
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| 242 | # If it is set to "silent_", nothing wil be printed at all, since
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| 243 | # the variable $(silent_cmd_cc_o_c) doesn't exist.
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| 244 | #
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| 245 | # A simple variant is to prefix commands with $(Q) - that's useful
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| 246 | # for commands that shall be hidden in non-verbose mode.
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| 247 | #
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| 248 | # $(Q)ln $@ :<
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| 249 | #
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| 250 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
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| 251 | # If KBUILD_VERBOSE equals 1 then the above command is displayed.
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| 252 |
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| 253 | ifeq ($(KBUILD_VERBOSE),1)
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| 254 | quiet =
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| 255 | Q =
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| 256 | else
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| 257 | quiet=quiet_
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| 258 | Q = @
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[821] | 259 | endif
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| 260 |
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[1765] | 261 | # If the user is running make -s (silent mode), suppress echoing of
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| 262 | # commands
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[821] | 263 |
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[1765] | 264 | ifneq ($(findstring s,$(MAKEFLAGS)),)
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| 265 | quiet=silent_
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| 266 | endif
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[821] | 267 |
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[1765] | 268 | export quiet Q KBUILD_VERBOSE
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[821] | 269 |
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| 270 |
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[1765] | 271 | # Look for make include files relative to root of kernel src
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| 272 | MAKEFLAGS += --include-dir=$(srctree)
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[821] | 273 |
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[1765] | 274 | HOSTCC = gcc
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| 275 | HOSTCXX = g++
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| 276 | HOSTCFLAGS :=
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| 277 | HOSTCXXFLAGS :=
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| 278 | # We need some generic definitions
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| 279 | include $(srctree)/scripts/Kbuild.include
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[821] | 280 |
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[1765] | 281 | HOSTCFLAGS += $(call hostcc-option,-Wall -Wstrict-prototypes -O2 -fomit-frame-pointer,)
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| 282 | HOSTCXXFLAGS += -O2
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[821] | 283 |
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[1765] | 284 | # For maximum performance (+ possibly random breakage, uncomment
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| 285 | # the following)
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[821] | 286 |
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[1765] | 287 | MAKEFLAGS += -rR
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[821] | 288 |
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[1765] | 289 | # Make variables (CC, etc...)
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[821] | 290 |
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[1765] | 291 | AS = $(CROSS_COMPILE)as
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| 292 | CC = $(CROSS_COMPILE)gcc
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| 293 | LD = $(CC) -nostdlib
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| 294 | CPP = $(CC) -E
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| 295 | AR = $(CROSS_COMPILE)ar
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| 296 | NM = $(CROSS_COMPILE)nm
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| 297 | STRIP = $(CROSS_COMPILE)strip
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| 298 | OBJCOPY = $(CROSS_COMPILE)objcopy
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| 299 | OBJDUMP = $(CROSS_COMPILE)objdump
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| 300 | AWK = awk
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| 301 | GENKSYMS = scripts/genksyms/genksyms
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| 302 | DEPMOD = /sbin/depmod
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| 303 | KALLSYMS = scripts/kallsyms
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| 304 | PERL = perl
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| 305 | CHECK = sparse
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[821] | 306 |
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[1765] | 307 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
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| 308 | MODFLAGS = -DMODULE
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| 309 | CFLAGS_MODULE = $(MODFLAGS)
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| 310 | AFLAGS_MODULE = $(MODFLAGS)
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| 311 | LDFLAGS_MODULE = -r
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| 312 | CFLAGS_KERNEL =
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| 313 | AFLAGS_KERNEL =
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[821] | 314 |
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| 315 |
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[1765] | 316 | # Use LINUXINCLUDE when you must reference the include/ directory.
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| 317 | # Needed to be compatible with the O= option
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| 318 | CFLAGS := $(CFLAGS)
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[2725] | 319 | # Added only to final link stage of busybox binary
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| 320 | CFLAGS_busybox := $(CFLAGS_busybox)
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[1765] | 321 | CPPFLAGS := $(CPPFLAGS)
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| 322 | AFLAGS := $(AFLAGS)
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| 323 | LDFLAGS := $(LDFLAGS)
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| 324 | LDLIBS :=
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[821] | 325 |
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[1765] | 326 | # Read KERNELRELEASE from .kernelrelease (if it exists)
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| 327 | KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
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| 328 | KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
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[821] | 329 |
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[1765] | 330 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
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| 331 | ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
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| 332 | CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
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| 333 | HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
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[821] | 334 |
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[1765] | 335 | export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
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| 336 | export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
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| 337 | export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
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| 338 | export FLTFLAGS
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[821] | 339 |
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[1765] | 340 | # When compiling out-of-tree modules, put MODVERDIR in the module
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| 341 | # tree rather than in the kernel tree. The kernel tree might
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| 342 | # even be read-only.
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| 343 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
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[821] | 344 |
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[1765] | 345 | # Files to ignore in find ... statements
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[821] | 346 |
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[1765] | 347 | RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
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| 348 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
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[821] | 349 |
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[1765] | 350 | # ===========================================================================
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| 351 | # Rules shared between *config targets and build targets
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[821] | 352 |
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[1765] | 353 | # Basic helpers built in scripts/
|
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| 354 | PHONY += scripts_basic
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| 355 | scripts_basic:
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| 356 | $(Q)$(MAKE) $(build)=scripts/basic
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[821] | 357 |
|
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[1765] | 358 | # To avoid any implicit rule to kick in, define an empty command.
|
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| 359 | scripts/basic/%: scripts_basic ;
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[821] | 360 |
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[2725] | 361 | # This target generates Kbuild's and Config.in's from *.c files
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| 362 | PHONY += gen_build_files
|
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| 363 | gen_build_files: $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c)
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| 364 | $(Q)$(srctree)/scripts/gen_build_files.sh $(srctree) $(objtree)
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| 365 |
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| 366 | # bbox: we have helpers in applets/
|
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| 367 | # we depend on scripts_basic, since scripts/basic/fixdep
|
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| 368 | # must be built before any other host prog
|
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| 369 | PHONY += applets_dir
|
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| 370 | applets_dir: scripts_basic gen_build_files
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| 371 | $(Q)$(MAKE) $(build)=applets
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| 372 |
|
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| 373 | applets/%: applets_dir ;
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| 374 |
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[1765] | 375 | PHONY += outputmakefile
|
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| 376 | # outputmakefile generates a Makefile in the output directory, if using a
|
---|
| 377 | # separate output directory. This allows convenient use of make in the
|
---|
| 378 | # output directory.
|
---|
| 379 | outputmakefile:
|
---|
| 380 | ifneq ($(KBUILD_SRC),)
|
---|
| 381 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
|
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| 382 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
|
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| 383 | endif
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[821] | 384 |
|
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[1765] | 385 | # To make sure we do not include .config for any of the *config targets
|
---|
| 386 | # catch them early, and hand them over to scripts/kconfig/Makefile
|
---|
| 387 | # It is allowed to specify more targets when calling make, including
|
---|
| 388 | # mixing *config targets and build targets.
|
---|
| 389 | # For example 'make oldconfig all'.
|
---|
| 390 | # Detect when mixed targets is specified, and make a second invocation
|
---|
| 391 | # of make so .config is not included in this case either (for *config).
|
---|
[821] | 392 |
|
---|
[1765] | 393 | no-dot-config-targets := clean mrproper distclean \
|
---|
[2725] | 394 | cscope TAGS tags help %docs
|
---|
| 395 | #bbox# check% is removed from above
|
---|
[821] | 396 |
|
---|
[1765] | 397 | config-targets := 0
|
---|
| 398 | mixed-targets := 0
|
---|
| 399 | dot-config := 1
|
---|
[821] | 400 |
|
---|
[1765] | 401 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
|
---|
| 402 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
|
---|
| 403 | dot-config := 0
|
---|
| 404 | endif
|
---|
| 405 | endif
|
---|
[821] | 406 |
|
---|
[1765] | 407 | ifeq ($(KBUILD_EXTMOD),)
|
---|
| 408 | ifneq ($(filter config %config,$(MAKECMDGOALS)),)
|
---|
| 409 | config-targets := 1
|
---|
| 410 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
|
---|
| 411 | mixed-targets := 1
|
---|
| 412 | endif
|
---|
| 413 | endif
|
---|
| 414 | endif
|
---|
[821] | 415 |
|
---|
[1765] | 416 | ifeq ($(mixed-targets),1)
|
---|
| 417 | # ===========================================================================
|
---|
| 418 | # We're called with mixed targets (*config and build targets).
|
---|
| 419 | # Handle them one by one.
|
---|
[821] | 420 |
|
---|
[1765] | 421 | %:: FORCE
|
---|
| 422 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
|
---|
[821] | 423 |
|
---|
[1765] | 424 | else
|
---|
| 425 | ifeq ($(config-targets),1)
|
---|
| 426 | # ===========================================================================
|
---|
| 427 | # *config targets only - make sure prerequisites are updated, and descend
|
---|
| 428 | # in scripts/kconfig to make the *config target
|
---|
[821] | 429 |
|
---|
[1765] | 430 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
|
---|
| 431 | # KBUILD_DEFCONFIG may point out an alternative default configuration
|
---|
| 432 | # used for 'make defconfig'
|
---|
| 433 | -include $(srctree)/arch/$(ARCH)/Makefile
|
---|
| 434 | export KBUILD_DEFCONFIG
|
---|
[821] | 435 |
|
---|
[2725] | 436 | config: scripts_basic outputmakefile gen_build_files FORCE
|
---|
[1765] | 437 | $(Q)mkdir -p include
|
---|
| 438 | $(Q)$(MAKE) $(build)=scripts/kconfig $@
|
---|
| 439 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
|
---|
[821] | 440 |
|
---|
[2725] | 441 | %config: scripts_basic outputmakefile gen_build_files FORCE
|
---|
| 442 | $(Q)mkdir -p include
|
---|
| 443 | $(Q)$(MAKE) $(build)=scripts/kconfig $@
|
---|
| 444 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
|
---|
| 445 |
|
---|
[1765] | 446 | else
|
---|
| 447 | # ===========================================================================
|
---|
| 448 | # Build targets only - this includes busybox, arch specific targets, clean
|
---|
| 449 | # targets and others. In general all targets except *config targets.
|
---|
[821] | 450 |
|
---|
[1765] | 451 | ifeq ($(KBUILD_EXTMOD),)
|
---|
| 452 | # Additional helpers built in scripts/
|
---|
| 453 | # Carefully list dependencies so we do not try to build scripts twice
|
---|
[2725] | 454 | # in parallel
|
---|
[1765] | 455 | PHONY += scripts
|
---|
[2725] | 456 | scripts: gen_build_files scripts_basic include/config/MARKER
|
---|
[1765] | 457 | $(Q)$(MAKE) $(build)=$(@)
|
---|
[821] | 458 |
|
---|
[1765] | 459 | scripts_basic: include/autoconf.h
|
---|
[821] | 460 |
|
---|
[1765] | 461 | # Objects we will link into busybox / subdirs we need to visit
|
---|
| 462 | core-y := \
|
---|
| 463 | applets/ \
|
---|
[821] | 464 |
|
---|
[1765] | 465 | libs-y := \
|
---|
| 466 | archival/ \
|
---|
[2725] | 467 | archival/libarchive/ \
|
---|
[1765] | 468 | console-tools/ \
|
---|
| 469 | coreutils/ \
|
---|
| 470 | coreutils/libcoreutils/ \
|
---|
| 471 | debianutils/ \
|
---|
| 472 | e2fsprogs/ \
|
---|
| 473 | editors/ \
|
---|
| 474 | findutils/ \
|
---|
| 475 | init/ \
|
---|
| 476 | libbb/ \
|
---|
| 477 | libpwdgrp/ \
|
---|
| 478 | loginutils/ \
|
---|
[2725] | 479 | mailutils/ \
|
---|
[1765] | 480 | miscutils/ \
|
---|
| 481 | modutils/ \
|
---|
| 482 | networking/ \
|
---|
| 483 | networking/libiproute/ \
|
---|
| 484 | networking/udhcp/ \
|
---|
[2725] | 485 | printutils/ \
|
---|
[1765] | 486 | procps/ \
|
---|
| 487 | runit/ \
|
---|
| 488 | selinux/ \
|
---|
| 489 | shell/ \
|
---|
| 490 | sysklogd/ \
|
---|
| 491 | util-linux/ \
|
---|
[2725] | 492 | util-linux/volume_id/ \
|
---|
[821] | 493 |
|
---|
[1765] | 494 | endif # KBUILD_EXTMOD
|
---|
[821] | 495 |
|
---|
[1765] | 496 | ifeq ($(dot-config),1)
|
---|
| 497 | # In this section, we need .config
|
---|
[821] | 498 |
|
---|
[1765] | 499 | # Read in dependencies to all Kconfig* files, make sure to run
|
---|
| 500 | # oldconfig if changes are detected.
|
---|
| 501 | -include .kconfig.d
|
---|
| 502 |
|
---|
| 503 | -include .config
|
---|
| 504 |
|
---|
| 505 | # If .config needs to be updated, it will be done via the dependency
|
---|
| 506 | # that autoconf has on .config.
|
---|
| 507 | # To avoid any implicit rule to kick in, define an empty command
|
---|
| 508 | .config .kconfig.d: ;
|
---|
| 509 |
|
---|
| 510 | # Now we can define CFLAGS etc according to .config
|
---|
| 511 | include $(srctree)/Makefile.flags
|
---|
| 512 |
|
---|
| 513 | # If .config is newer than include/autoconf.h, someone tinkered
|
---|
| 514 | # with it and forgot to run make oldconfig.
|
---|
| 515 | # If kconfig.d is missing then we are probarly in a cleaned tree so
|
---|
| 516 | # we execute the config step to be sure to catch updated Kconfig files
|
---|
[2725] | 517 | include/autoconf.h: .kconfig.d .config $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) | gen_build_files
|
---|
[1765] | 518 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
|
---|
| 519 |
|
---|
[2725] | 520 | include/usage.h: gen_build_files
|
---|
| 521 |
|
---|
[1765] | 522 | else
|
---|
| 523 | # Dummy target needed, because used as prerequisite
|
---|
| 524 | include/autoconf.h: ;
|
---|
[821] | 525 | endif
|
---|
| 526 |
|
---|
[1765] | 527 | # The all: target is the default when no target is given on the
|
---|
| 528 | # command line.
|
---|
| 529 | # This allow a user to issue only 'make' to build a kernel including modules
|
---|
| 530 | # Defaults busybox but it is usually overridden in the arch makefile
|
---|
[2725] | 531 | all: busybox doc
|
---|
[1765] | 532 |
|
---|
| 533 | -include $(srctree)/arch/$(ARCH)/Makefile
|
---|
| 534 |
|
---|
| 535 | # arch Makefile may override CC so keep this after arch Makefile is included
|
---|
| 536 | #bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
|
---|
| 537 | CHECKFLAGS += $(NOSTDINC_FLAGS)
|
---|
| 538 |
|
---|
| 539 | # Default kernel image to build when no specific target is given.
|
---|
| 540 | # KBUILD_IMAGE may be overruled on the commandline or
|
---|
| 541 | # set in the environment
|
---|
| 542 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over
|
---|
| 543 | # this default value
|
---|
| 544 | export KBUILD_IMAGE ?= busybox
|
---|
| 545 |
|
---|
| 546 | #
|
---|
| 547 | # INSTALL_PATH specifies where to place the updated kernel and system map
|
---|
| 548 | # images. Default is /boot, but you can set it to other values
|
---|
| 549 | export INSTALL_PATH ?= /boot
|
---|
| 550 |
|
---|
| 551 | #
|
---|
| 552 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
|
---|
| 553 | # relocations required by build roots. This is not defined in the
|
---|
| 554 | # makefile but the arguement can be passed to make if needed.
|
---|
| 555 | #
|
---|
| 556 |
|
---|
| 557 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
|
---|
| 558 | export MODLIB
|
---|
| 559 |
|
---|
| 560 |
|
---|
| 561 | ifeq ($(KBUILD_EXTMOD),)
|
---|
| 562 | busybox-dirs := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m)))
|
---|
| 563 |
|
---|
| 564 | busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \
|
---|
| 565 | $(core-n) $(core-) $(libs-n) $(libs-) \
|
---|
| 566 | )))
|
---|
| 567 |
|
---|
| 568 | core-y := $(patsubst %/, %/built-in.o, $(core-y))
|
---|
| 569 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
|
---|
| 570 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
|
---|
| 571 | libs-y := $(libs-y1) $(libs-y2)
|
---|
| 572 |
|
---|
| 573 | # Build busybox
|
---|
| 574 | # ---------------------------------------------------------------------------
|
---|
| 575 | # busybox is build from the objects selected by $(busybox-init) and
|
---|
| 576 | # $(busybox-main). Most are built-in.o files from top-level directories
|
---|
| 577 | # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
|
---|
| 578 | # Ordering when linking is important, and $(busybox-init) must be first.
|
---|
| 579 | #
|
---|
| 580 | # busybox
|
---|
| 581 | # ^
|
---|
| 582 | # |
|
---|
| 583 | # +-< $(busybox-init)
|
---|
| 584 | # | +--< init/version.o + more
|
---|
| 585 | # |
|
---|
| 586 | # +--< $(busybox-main)
|
---|
| 587 | # | +--< driver/built-in.o mm/built-in.o + more
|
---|
| 588 | # |
|
---|
| 589 | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
|
---|
| 590 | #
|
---|
| 591 | # busybox version (uname -v) cannot be updated during normal
|
---|
| 592 | # descending-into-subdirs phase since we do not yet know if we need to
|
---|
| 593 | # update busybox.
|
---|
| 594 | # Therefore this step is delayed until just before final link of busybox -
|
---|
| 595 | # except in the kallsyms case where it is done just before adding the
|
---|
| 596 | # symbols to the kernel.
|
---|
| 597 | #
|
---|
| 598 | # System.map is generated to document addresses of all kernel symbols
|
---|
| 599 |
|
---|
| 600 | busybox-all := $(core-y) $(libs-y)
|
---|
| 601 |
|
---|
| 602 | # Rule to link busybox - also used during CONFIG_KALLSYMS
|
---|
| 603 | # May be overridden by arch/$(ARCH)/Makefile
|
---|
| 604 | quiet_cmd_busybox__ ?= LINK $@
|
---|
[2725] | 605 | cmd_busybox__ ?= $(srctree)/scripts/trylink \
|
---|
| 606 | "$@" \
|
---|
| 607 | "$(CC)" \
|
---|
| 608 | "$(CFLAGS) $(CFLAGS_busybox)" \
|
---|
| 609 | "$(LDFLAGS) $(EXTRA_LDFLAGS)" \
|
---|
| 610 | "$(core-y)" \
|
---|
| 611 | "$(libs-y)" \
|
---|
| 612 | "$(LDLIBS)"
|
---|
[1765] | 613 |
|
---|
| 614 | # Generate System.map
|
---|
| 615 | quiet_cmd_sysmap = SYSMAP
|
---|
| 616 | cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
|
---|
| 617 |
|
---|
| 618 | # Link of busybox
|
---|
| 619 | # If CONFIG_KALLSYMS is set .version is already updated
|
---|
| 620 | # Generate System.map and verify that the content is consistent
|
---|
| 621 | # Use + in front of the busybox_version rule to silent warning with make -j2
|
---|
| 622 | # First command is ':' to allow us to use + in front of the rule
|
---|
| 623 | define rule_busybox__
|
---|
| 624 | :
|
---|
| 625 | $(call cmd,busybox__)
|
---|
| 626 | $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
|
---|
| 627 | endef
|
---|
| 628 |
|
---|
| 629 |
|
---|
| 630 | ifdef CONFIG_KALLSYMS
|
---|
| 631 | # Generate section listing all symbols and add it into busybox $(kallsyms.o)
|
---|
| 632 | # It's a three stage process:
|
---|
| 633 | # o .tmp_busybox1 has all symbols and sections, but __kallsyms is
|
---|
| 634 | # empty
|
---|
| 635 | # Running kallsyms on that gives us .tmp_kallsyms1.o with
|
---|
| 636 | # the right size - busybox version (uname -v) is updated during this step
|
---|
| 637 | # o .tmp_busybox2 now has a __kallsyms section of the right size,
|
---|
| 638 | # but due to the added section, some addresses have shifted.
|
---|
| 639 | # From here, we generate a correct .tmp_kallsyms2.o
|
---|
| 640 | # o The correct .tmp_kallsyms2.o is linked into the final busybox.
|
---|
| 641 | # o Verify that the System.map from busybox matches the map from
|
---|
| 642 | # .tmp_busybox2, just in case we did not generate kallsyms correctly.
|
---|
| 643 | # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
|
---|
| 644 | # .tmp_busybox3 and .tmp_kallsyms3.o. This is only meant as a
|
---|
| 645 | # temporary bypass to allow the kernel to be built while the
|
---|
| 646 | # maintainers work out what went wrong with kallsyms.
|
---|
| 647 |
|
---|
| 648 | ifdef CONFIG_KALLSYMS_EXTRA_PASS
|
---|
| 649 | last_kallsyms := 3
|
---|
| 650 | else
|
---|
| 651 | last_kallsyms := 2
|
---|
[821] | 652 | endif
|
---|
| 653 |
|
---|
[1765] | 654 | kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
|
---|
[821] | 655 |
|
---|
[1765] | 656 | define verify_kallsyms
|
---|
| 657 | $(Q)$(if $($(quiet)cmd_sysmap), \
|
---|
| 658 | echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
|
---|
| 659 | $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map
|
---|
| 660 | $(Q)cmp -s System.map .tmp_System.map || \
|
---|
| 661 | (echo Inconsistent kallsyms data; \
|
---|
| 662 | echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
|
---|
| 663 | rm .tmp_kallsyms* ; /bin/false )
|
---|
| 664 | endef
|
---|
[821] | 665 |
|
---|
[1765] | 666 | # Update busybox version before link
|
---|
| 667 | # Use + in front of this rule to silent warning about make -j1
|
---|
| 668 | # First command is ':' to allow us to use + in front of this rule
|
---|
| 669 | cmd_ksym_ld = $(cmd_busybox__)
|
---|
| 670 | define rule_ksym_ld
|
---|
| 671 | :
|
---|
| 672 | +$(call cmd,busybox_version)
|
---|
| 673 | $(call cmd,busybox__)
|
---|
| 674 | $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
|
---|
| 675 | endef
|
---|
| 676 |
|
---|
| 677 | # Generate .S file with all kernel symbols
|
---|
| 678 | quiet_cmd_kallsyms = KSYM $@
|
---|
| 679 | cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
|
---|
| 680 | $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
|
---|
| 681 |
|
---|
| 682 | .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
|
---|
| 683 | $(call if_changed_dep,as_o_S)
|
---|
| 684 |
|
---|
| 685 | .tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS)
|
---|
| 686 | $(call cmd,kallsyms)
|
---|
| 687 |
|
---|
| 688 | # .tmp_busybox1 must be complete except kallsyms, so update busybox version
|
---|
| 689 | .tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE
|
---|
| 690 | $(call if_changed_rule,ksym_ld)
|
---|
| 691 |
|
---|
| 692 | .tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE
|
---|
| 693 | $(call if_changed,busybox__)
|
---|
| 694 |
|
---|
| 695 | .tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE
|
---|
| 696 | $(call if_changed,busybox__)
|
---|
| 697 |
|
---|
| 698 | # Needs to visit scripts/ before $(KALLSYMS) can be used.
|
---|
| 699 | $(KALLSYMS): scripts ;
|
---|
| 700 |
|
---|
| 701 | # Generate some data for debugging strange kallsyms problems
|
---|
| 702 | debug_kallsyms: .tmp_map$(last_kallsyms)
|
---|
| 703 |
|
---|
| 704 | .tmp_map%: .tmp_busybox% FORCE
|
---|
| 705 | ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
|
---|
| 706 |
|
---|
| 707 | .tmp_map3: .tmp_map2
|
---|
| 708 |
|
---|
| 709 | .tmp_map2: .tmp_map1
|
---|
| 710 |
|
---|
| 711 | endif # ifdef CONFIG_KALLSYMS
|
---|
| 712 |
|
---|
| 713 | # busybox image - including updated kernel symbols
|
---|
| 714 | busybox_unstripped: $(busybox-all) FORCE
|
---|
| 715 | $(call if_changed_rule,busybox__)
|
---|
| 716 | $(Q)rm -f .old_version
|
---|
| 717 |
|
---|
[821] | 718 | busybox: busybox_unstripped
|
---|
[1765] | 719 | ifeq ($(SKIP_STRIP),y)
|
---|
| 720 | $(Q)cp $< $@
|
---|
| 721 | else
|
---|
| 722 | $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \
|
---|
| 723 | busybox_unstripped -o $@
|
---|
[2725] | 724 | # strip is confused by PIE executable and does not set exec bits
|
---|
| 725 | $(Q)chmod a+x $@
|
---|
[1765] | 726 | endif
|
---|
[821] | 727 |
|
---|
[1765] | 728 | # The actual objects are generated when descending,
|
---|
| 729 | # make sure no implicit rule kicks in
|
---|
| 730 | $(sort $(busybox-all)): $(busybox-dirs) ;
|
---|
[821] | 731 |
|
---|
[1765] | 732 | # Handle descending into subdirectories listed in $(busybox-dirs)
|
---|
| 733 | # Preset locale variables to speed up the build process. Limit locale
|
---|
| 734 | # tweaks to this spot to avoid wrong language settings when running
|
---|
| 735 | # make menuconfig etc.
|
---|
| 736 | # Error messages still appears in the original language
|
---|
[821] | 737 |
|
---|
[1765] | 738 | PHONY += $(busybox-dirs)
|
---|
| 739 | $(busybox-dirs): prepare scripts
|
---|
| 740 | $(Q)$(MAKE) $(build)=$@
|
---|
| 741 |
|
---|
| 742 | # Build the kernel release string
|
---|
| 743 | # The KERNELRELEASE is stored in a file named .kernelrelease
|
---|
| 744 | # to be used when executing for example make install or make modules_install
|
---|
| 745 | #
|
---|
| 746 | # Take the contents of any files called localversion* and the config
|
---|
| 747 | # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
|
---|
| 748 | # LOCALVERSION from the command line override all of this
|
---|
| 749 |
|
---|
| 750 | nullstring :=
|
---|
| 751 | space := $(nullstring) # end of line
|
---|
| 752 |
|
---|
| 753 | ___localver = $(objtree)/localversion* $(srctree)/localversion*
|
---|
| 754 | __localver = $(sort $(wildcard $(___localver)))
|
---|
| 755 | # skip backup files (containing '~')
|
---|
| 756 | _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
|
---|
| 757 |
|
---|
| 758 | localver = $(subst $(space),, \
|
---|
| 759 | $(shell cat /dev/null $(_localver)) \
|
---|
| 760 | $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
|
---|
| 761 |
|
---|
| 762 | # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
|
---|
| 763 | # and if the SCM is know a tag from the SCM is appended.
|
---|
| 764 | # The appended tag is determinded by the SCM used.
|
---|
| 765 | #
|
---|
| 766 | # Currently, only git is supported.
|
---|
| 767 | # Other SCMs can edit scripts/setlocalversion and add the appropriate
|
---|
| 768 | # checks as needed.
|
---|
[2725] | 769 | ifdef _BB_DISABLED_CONFIG_LOCALVERSION_AUTO
|
---|
[1765] | 770 | _localver-auto = $(shell $(CONFIG_SHELL) \
|
---|
| 771 | $(srctree)/scripts/setlocalversion $(srctree))
|
---|
| 772 | localver-auto = $(LOCALVERSION)$(_localver-auto)
|
---|
| 773 | endif
|
---|
| 774 |
|
---|
| 775 | localver-full = $(localver)$(localver-auto)
|
---|
| 776 |
|
---|
| 777 | # Store (new) KERNELRELASE string in .kernelrelease
|
---|
| 778 | kernelrelease = $(KERNELVERSION)$(localver-full)
|
---|
| 779 | .kernelrelease: FORCE
|
---|
| 780 | $(Q)rm -f $@
|
---|
| 781 | $(Q)echo $(kernelrelease) > $@
|
---|
| 782 |
|
---|
| 783 |
|
---|
| 784 | # Things we need to do before we recursively start building the kernel
|
---|
| 785 | # or the modules are listed in "prepare".
|
---|
| 786 | # A multi level approach is used. prepareN is processed before prepareN-1.
|
---|
| 787 | # archprepare is used in arch Makefiles and when processed asm symlink,
|
---|
| 788 | # version.h and scripts_basic is processed / created.
|
---|
| 789 |
|
---|
| 790 | # Listed in dependency order
|
---|
| 791 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
|
---|
| 792 |
|
---|
| 793 | # prepare-all is deprecated, use prepare as valid replacement
|
---|
| 794 | PHONY += prepare-all
|
---|
| 795 |
|
---|
| 796 | # prepare3 is used to check if we are building in a separate output directory,
|
---|
| 797 | # and if so do:
|
---|
| 798 | # 1) Check that make has not been executed in the kernel src $(srctree)
|
---|
| 799 | # 2) Create the include2 directory, used for the second asm symlink
|
---|
| 800 | prepare3: .kernelrelease
|
---|
| 801 | ifneq ($(KBUILD_SRC),)
|
---|
| 802 | @echo ' Using $(srctree) as source for busybox'
|
---|
| 803 | $(Q)if [ -f $(srctree)/.config ]; then \
|
---|
| 804 | echo " $(srctree) is not clean, please run 'make mrproper'";\
|
---|
| 805 | echo " in the '$(srctree)' directory.";\
|
---|
| 806 | /bin/false; \
|
---|
| 807 | fi;
|
---|
| 808 | $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
|
---|
| 809 | $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
|
---|
| 810 | endif
|
---|
| 811 |
|
---|
| 812 | # prepare2 creates a makefile if using a separate output directory
|
---|
| 813 | prepare2: prepare3 outputmakefile
|
---|
| 814 |
|
---|
| 815 | prepare1: prepare2 include/config/MARKER
|
---|
| 816 | ifneq ($(KBUILD_MODULES),)
|
---|
| 817 | $(Q)mkdir -p $(MODVERDIR)
|
---|
| 818 | $(Q)rm -f $(MODVERDIR)/*
|
---|
| 819 | endif
|
---|
| 820 |
|
---|
[2725] | 821 | archprepare: prepare1 scripts_basic applets_dir
|
---|
[1765] | 822 |
|
---|
| 823 | prepare0: archprepare FORCE
|
---|
| 824 | $(Q)$(MAKE) $(build)=.
|
---|
| 825 |
|
---|
| 826 | # All the preparing..
|
---|
| 827 | prepare prepare-all: prepare0
|
---|
| 828 |
|
---|
| 829 | # Leave this as default for preprocessing busybox.lds.S, which is now
|
---|
| 830 | # done in arch/$(ARCH)/kernel/Makefile
|
---|
| 831 |
|
---|
| 832 | export CPPFLAGS_busybox.lds += -P -C -U$(ARCH)
|
---|
| 833 |
|
---|
| 834 | # FIXME: The asm symlink changes when $(ARCH) changes. That's
|
---|
| 835 | # hard to detect, but I suppose "make mrproper" is a good idea
|
---|
| 836 | # before switching between archs anyway.
|
---|
| 837 |
|
---|
| 838 | #bbox# include/asm:
|
---|
| 839 | #bbox# @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
|
---|
| 840 | #bbox# $(Q)if [ ! -d include ]; then mkdir -p include; fi;
|
---|
| 841 | #bbox# @ln -fsn asm-$(ARCH) $@
|
---|
| 842 |
|
---|
| 843 | # Split autoconf.h into include/linux/config/*
|
---|
| 844 | quiet_cmd_gen_bbconfigopts = GEN include/bbconfigopts.h
|
---|
[2725] | 845 | cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs include/bbconfigopts.h include/bbconfigopts_bz2.h
|
---|
[1765] | 846 | quiet_cmd_split_autoconf = SPLIT include/autoconf.h -> include/config/*
|
---|
| 847 | cmd_split_autoconf = scripts/basic/split-include include/autoconf.h include/config
|
---|
| 848 | #bbox# piggybacked generation of few .h files
|
---|
| 849 | include/config/MARKER: scripts/basic/split-include include/autoconf.h
|
---|
| 850 | $(call cmd,split_autoconf)
|
---|
| 851 | $(call cmd,gen_bbconfigopts)
|
---|
| 852 | @touch $@
|
---|
| 853 |
|
---|
| 854 | # Generate some files
|
---|
| 855 | # ---------------------------------------------------------------------------
|
---|
| 856 |
|
---|
| 857 | # KERNELRELEASE can change from a few different places, meaning version.h
|
---|
| 858 | # needs to be updated, so this check is forced on all builds
|
---|
| 859 |
|
---|
| 860 | uts_len := 64
|
---|
| 861 |
|
---|
| 862 | define filechk_version.h
|
---|
| 863 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
|
---|
| 864 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
|
---|
| 865 | exit 1; \
|
---|
| 866 | fi; \
|
---|
| 867 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
|
---|
| 868 | echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
|
---|
| 869 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
|
---|
| 870 | )
|
---|
| 871 | endef
|
---|
| 872 |
|
---|
| 873 | # ---------------------------------------------------------------------------
|
---|
| 874 |
|
---|
| 875 | PHONY += depend dep
|
---|
| 876 | depend dep:
|
---|
| 877 | @echo '*** Warning: make $@ is unnecessary now.'
|
---|
| 878 |
|
---|
| 879 | # ---------------------------------------------------------------------------
|
---|
| 880 | # Modules
|
---|
| 881 |
|
---|
[2725] | 882 | ifdef _BB_DISABLED_CONFIG_MODULES
|
---|
[1765] | 883 |
|
---|
| 884 | # By default, build modules as well
|
---|
| 885 |
|
---|
| 886 | all: modules
|
---|
| 887 |
|
---|
| 888 | # Build modules
|
---|
| 889 |
|
---|
| 890 | PHONY += modules
|
---|
| 891 | modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox)
|
---|
| 892 | @echo ' Building modules, stage 2.';
|
---|
| 893 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
|
---|
| 894 |
|
---|
| 895 |
|
---|
| 896 | # Target to prepare building external modules
|
---|
| 897 | PHONY += modules_prepare
|
---|
| 898 | modules_prepare: prepare scripts
|
---|
| 899 |
|
---|
| 900 | # Target to install modules
|
---|
| 901 | PHONY += modules_install
|
---|
| 902 | modules_install: _modinst_ _modinst_post
|
---|
| 903 |
|
---|
| 904 | PHONY += _modinst_
|
---|
| 905 | _modinst_:
|
---|
| 906 | @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
|
---|
| 907 | echo "Warning: you may need to install module-init-tools"; \
|
---|
| 908 | echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
|
---|
| 909 | sleep 1; \
|
---|
| 910 | fi
|
---|
| 911 | @rm -rf $(MODLIB)/kernel
|
---|
| 912 | @rm -f $(MODLIB)/source
|
---|
| 913 | @mkdir -p $(MODLIB)/kernel
|
---|
| 914 | @ln -s $(srctree) $(MODLIB)/source
|
---|
| 915 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
|
---|
| 916 | rm -f $(MODLIB)/build ; \
|
---|
| 917 | ln -s $(objtree) $(MODLIB)/build ; \
|
---|
| 918 | fi
|
---|
| 919 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
|
---|
| 920 |
|
---|
| 921 | # If System.map exists, run depmod. This deliberately does not have a
|
---|
| 922 | # dependency on System.map since that would run the dependency tree on
|
---|
| 923 | # busybox. This depmod is only for convenience to give the initial
|
---|
| 924 | # boot a modules.dep even before / is mounted read-write. However the
|
---|
| 925 | # boot script depmod is the master version.
|
---|
| 926 | ifeq "$(strip $(INSTALL_MOD_PATH))" ""
|
---|
| 927 | depmod_opts :=
|
---|
| 928 | else
|
---|
| 929 | depmod_opts := -b $(INSTALL_MOD_PATH) -r
|
---|
| 930 | endif
|
---|
| 931 | PHONY += _modinst_post
|
---|
| 932 | _modinst_post: _modinst_
|
---|
| 933 | if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
|
---|
| 934 |
|
---|
| 935 | else # CONFIG_MODULES
|
---|
| 936 |
|
---|
| 937 | # Modules not configured
|
---|
| 938 | # ---------------------------------------------------------------------------
|
---|
| 939 |
|
---|
| 940 | modules modules_install: FORCE
|
---|
[821] | 941 | @echo
|
---|
[1765] | 942 | @echo "The present busybox configuration has modules disabled."
|
---|
| 943 | @echo "Type 'make config' and enable loadable module support."
|
---|
| 944 | @echo "Then build a kernel with module support enabled."
|
---|
[821] | 945 | @echo
|
---|
[1765] | 946 | @exit 1
|
---|
| 947 |
|
---|
| 948 | endif # CONFIG_MODULES
|
---|
| 949 |
|
---|
| 950 | ###
|
---|
| 951 | # Cleaning is done on three levels.
|
---|
| 952 | # make clean Delete most generated files
|
---|
| 953 | # Leave enough to build external modules
|
---|
| 954 | # make mrproper Delete the current configuration, and all generated files
|
---|
| 955 | # make distclean Remove editor backup files, patch leftover files and the like
|
---|
| 956 |
|
---|
| 957 | # Directories & files removed with 'make clean'
|
---|
[2725] | 958 | CLEAN_DIRS += $(MODVERDIR) _install 0_lib
|
---|
| 959 | CLEAN_FILES += busybox busybox_unstripped* busybox.links \
|
---|
| 960 | System.map .kernelrelease \
|
---|
[1765] | 961 | .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map
|
---|
| 962 |
|
---|
| 963 | # Directories & files removed with 'make mrproper'
|
---|
| 964 | MRPROPER_DIRS += include/config include2
|
---|
| 965 | MRPROPER_FILES += .config .config.old include/asm .version .old_version \
|
---|
| 966 | include/autoconf.h \
|
---|
| 967 | include/bbconfigopts.h \
|
---|
| 968 | include/usage_compressed.h \
|
---|
[2725] | 969 | include/applet_tables.h \
|
---|
| 970 | applets/usage \
|
---|
| 971 | .kernelrelease Module.symvers tags TAGS cscope* \
|
---|
| 972 | busybox_old
|
---|
[1765] | 973 |
|
---|
| 974 | # clean - Delete most, but leave enough to build external modules
|
---|
| 975 | #
|
---|
| 976 | clean: rm-dirs := $(CLEAN_DIRS)
|
---|
| 977 | clean: rm-files := $(CLEAN_FILES)
|
---|
| 978 | clean-dirs := $(addprefix _clean_,$(srctree) $(busybox-alldirs))
|
---|
| 979 |
|
---|
| 980 | PHONY += $(clean-dirs) clean archclean
|
---|
| 981 | $(clean-dirs):
|
---|
| 982 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
|
---|
| 983 |
|
---|
| 984 | clean: archclean $(clean-dirs)
|
---|
| 985 | $(call cmd,rmdirs)
|
---|
| 986 | $(call cmd,rmfiles)
|
---|
| 987 | @find . $(RCS_FIND_IGNORE) \
|
---|
[2725] | 988 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
|
---|
[1765] | 989 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
|
---|
| 990 | -type f -print | xargs rm -f
|
---|
| 991 |
|
---|
[2725] | 992 | PHONY += doc-clean
|
---|
| 993 | doc-clean: rm-files := docs/busybox.pod \
|
---|
| 994 | docs/BusyBox.html docs/busybox.1 docs/BusyBox.txt
|
---|
| 995 | doc-clean:
|
---|
| 996 | $(call cmd,rmfiles)
|
---|
| 997 |
|
---|
[1765] | 998 | # mrproper - Delete all generated files, including .config
|
---|
| 999 | #
|
---|
| 1000 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
|
---|
| 1001 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
|
---|
| 1002 | mrproper-dirs := $(addprefix _mrproper_,scripts)
|
---|
| 1003 |
|
---|
| 1004 | PHONY += $(mrproper-dirs) mrproper archmrproper
|
---|
| 1005 | $(mrproper-dirs):
|
---|
| 1006 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
|
---|
| 1007 |
|
---|
| 1008 | mrproper: clean archmrproper $(mrproper-dirs)
|
---|
| 1009 | $(call cmd,rmdirs)
|
---|
| 1010 | $(call cmd,rmfiles)
|
---|
[2725] | 1011 | @find -name Config.src | sed 's/.src$$/.in/' | xargs -r rm -f
|
---|
| 1012 | @find -name Kbuild.src | sed 's/.src$$//' | xargs -r rm -f
|
---|
[1765] | 1013 |
|
---|
| 1014 | # distclean
|
---|
| 1015 | #
|
---|
| 1016 | PHONY += distclean
|
---|
| 1017 |
|
---|
| 1018 | distclean: mrproper
|
---|
| 1019 | @find $(srctree) $(RCS_FIND_IGNORE) \
|
---|
[2725] | 1020 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
|
---|
[1765] | 1021 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
|
---|
[2725] | 1022 | -o -name '.*.rej' -o -name '*.tmp' -o -size 0 \
|
---|
[1765] | 1023 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
|
---|
| 1024 | -type f -print | xargs rm -f
|
---|
| 1025 |
|
---|
| 1026 |
|
---|
| 1027 | # Packaging of the kernel to various formats
|
---|
| 1028 | # ---------------------------------------------------------------------------
|
---|
| 1029 | # rpm target kept for backward compatibility
|
---|
| 1030 | package-dir := $(srctree)/scripts/package
|
---|
| 1031 |
|
---|
| 1032 | %pkg: FORCE
|
---|
| 1033 | $(Q)$(MAKE) $(build)=$(package-dir) $@
|
---|
| 1034 | rpm: FORCE
|
---|
| 1035 | $(Q)$(MAKE) $(build)=$(package-dir) $@
|
---|
| 1036 |
|
---|
| 1037 |
|
---|
| 1038 | # Brief documentation of the typical targets used
|
---|
| 1039 | # ---------------------------------------------------------------------------
|
---|
| 1040 |
|
---|
| 1041 | boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
|
---|
| 1042 | boards := $(notdir $(boards))
|
---|
| 1043 |
|
---|
| 1044 | -include $(srctree)/Makefile.help
|
---|
| 1045 |
|
---|
| 1046 | # Documentation targets
|
---|
| 1047 | # ---------------------------------------------------------------------------
|
---|
| 1048 | %docs: scripts_basic FORCE
|
---|
| 1049 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@
|
---|
| 1050 |
|
---|
| 1051 | else # KBUILD_EXTMOD
|
---|
| 1052 |
|
---|
| 1053 | ###
|
---|
| 1054 | # External module support.
|
---|
| 1055 | # When building external modules the kernel used as basis is considered
|
---|
| 1056 | # read-only, and no consistency checks are made and the make
|
---|
| 1057 | # system is not used on the basis kernel. If updates are required
|
---|
| 1058 | # in the basis kernel ordinary make commands (without M=...) must
|
---|
| 1059 | # be used.
|
---|
| 1060 | #
|
---|
| 1061 | # The following are the only valid targets when building external
|
---|
| 1062 | # modules.
|
---|
| 1063 | # make M=dir clean Delete all automatically generated files
|
---|
| 1064 | # make M=dir modules Make all modules in specified dir
|
---|
| 1065 | # make M=dir Same as 'make M=dir modules'
|
---|
| 1066 | # make M=dir modules_install
|
---|
| 1067 | # Install the modules build in the module directory
|
---|
| 1068 | # Assumes install directory is already created
|
---|
| 1069 |
|
---|
| 1070 | # We are always building modules
|
---|
| 1071 | KBUILD_MODULES := 1
|
---|
| 1072 | PHONY += crmodverdir
|
---|
| 1073 | crmodverdir:
|
---|
| 1074 | $(Q)mkdir -p $(MODVERDIR)
|
---|
| 1075 | $(Q)rm -f $(MODVERDIR)/*
|
---|
| 1076 |
|
---|
| 1077 | PHONY += $(objtree)/Module.symvers
|
---|
| 1078 | $(objtree)/Module.symvers:
|
---|
| 1079 | @test -e $(objtree)/Module.symvers || ( \
|
---|
| 1080 | echo; \
|
---|
| 1081 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
|
---|
| 1082 | echo " is missing; modules will have no dependencies and modversions."; \
|
---|
| 1083 | echo )
|
---|
| 1084 |
|
---|
| 1085 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
|
---|
| 1086 | PHONY += $(module-dirs) modules
|
---|
| 1087 | $(module-dirs): crmodverdir $(objtree)/Module.symvers
|
---|
| 1088 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
|
---|
| 1089 |
|
---|
| 1090 | modules: $(module-dirs)
|
---|
| 1091 | @echo ' Building modules, stage 2.';
|
---|
| 1092 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
|
---|
| 1093 |
|
---|
| 1094 | PHONY += modules_install
|
---|
| 1095 | modules_install: _emodinst_ _emodinst_post
|
---|
| 1096 |
|
---|
| 1097 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
|
---|
| 1098 | PHONY += _emodinst_
|
---|
| 1099 | _emodinst_:
|
---|
| 1100 | $(Q)mkdir -p $(MODLIB)/$(install-dir)
|
---|
| 1101 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
|
---|
| 1102 |
|
---|
| 1103 | # Run depmod only is we have System.map and depmod is executable
|
---|
| 1104 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
|
---|
| 1105 | cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
|
---|
| 1106 | $(DEPMOD) -ae -F System.map \
|
---|
| 1107 | $(if $(strip $(INSTALL_MOD_PATH)), \
|
---|
| 1108 | -b $(INSTALL_MOD_PATH) -r) \
|
---|
| 1109 | $(KERNELRELEASE); \
|
---|
| 1110 | fi
|
---|
| 1111 |
|
---|
| 1112 | PHONY += _emodinst_post
|
---|
| 1113 | _emodinst_post: _emodinst_
|
---|
| 1114 | $(call cmd,depmod)
|
---|
| 1115 |
|
---|
| 1116 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
|
---|
| 1117 |
|
---|
| 1118 | PHONY += $(clean-dirs) clean
|
---|
| 1119 | $(clean-dirs):
|
---|
| 1120 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
|
---|
| 1121 |
|
---|
| 1122 | clean: rm-dirs := $(MODVERDIR)
|
---|
| 1123 | clean: $(clean-dirs)
|
---|
| 1124 | $(call cmd,rmdirs)
|
---|
| 1125 | @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
|
---|
[2725] | 1126 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
|
---|
[1765] | 1127 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
|
---|
| 1128 | -type f -print | xargs rm -f
|
---|
| 1129 |
|
---|
| 1130 | help:
|
---|
| 1131 | @echo ' Building external modules.'
|
---|
| 1132 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
|
---|
| 1133 | @echo ''
|
---|
| 1134 | @echo ' modules - default target, build the module(s)'
|
---|
| 1135 | @echo ' modules_install - install the module'
|
---|
| 1136 | @echo ' clean - remove generated files in module directory only'
|
---|
| 1137 | @echo ''
|
---|
| 1138 |
|
---|
| 1139 | # Dummies...
|
---|
| 1140 | PHONY += prepare scripts
|
---|
| 1141 | prepare: ;
|
---|
| 1142 | scripts: ;
|
---|
| 1143 | endif # KBUILD_EXTMOD
|
---|
| 1144 |
|
---|
| 1145 | # Generate tags for editors
|
---|
| 1146 | # ---------------------------------------------------------------------------
|
---|
| 1147 |
|
---|
| 1148 | #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
|
---|
| 1149 | #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
|
---|
| 1150 | #Adding $(srctree) adds about 20M on i386 to the size of the output file!
|
---|
| 1151 |
|
---|
| 1152 | ifeq ($(src),$(obj))
|
---|
| 1153 | __srctree =
|
---|
| 1154 | else
|
---|
| 1155 | __srctree = $(srctree)/
|
---|
[821] | 1156 | endif
|
---|
| 1157 |
|
---|
[1765] | 1158 | ifeq ($(ALLSOURCE_ARCHS),)
|
---|
| 1159 | ifeq ($(ARCH),um)
|
---|
| 1160 | ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
|
---|
| 1161 | else
|
---|
| 1162 | ALLINCLUDE_ARCHS := $(ARCH)
|
---|
[821] | 1163 | endif
|
---|
[1765] | 1164 | else
|
---|
| 1165 | #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
|
---|
| 1166 | ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
|
---|
| 1167 | endif
|
---|
[821] | 1168 |
|
---|
[1765] | 1169 | ALLSOURCE_ARCHS := $(ARCH)
|
---|
[821] | 1170 |
|
---|
[1765] | 1171 | define all-sources
|
---|
| 1172 | ( find $(__srctree) $(RCS_FIND_IGNORE) \
|
---|
| 1173 | \( -name include -o -name arch \) -prune -o \
|
---|
| 1174 | -name '*.[chS]' -print; \
|
---|
| 1175 | for ARCH in $(ALLSOURCE_ARCHS) ; do \
|
---|
| 1176 | find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
|
---|
| 1177 | -name '*.[chS]' -print; \
|
---|
| 1178 | done ; \
|
---|
| 1179 | find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
|
---|
| 1180 | -name '*.[chS]' -print; \
|
---|
| 1181 | find $(__srctree)include $(RCS_FIND_IGNORE) \
|
---|
| 1182 | \( -name config -o -name 'asm-*' \) -prune \
|
---|
| 1183 | -o -name '*.[chS]' -print; \
|
---|
| 1184 | for ARCH in $(ALLINCLUDE_ARCHS) ; do \
|
---|
| 1185 | find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
|
---|
| 1186 | -name '*.[chS]' -print; \
|
---|
| 1187 | done ; \
|
---|
| 1188 | find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
|
---|
| 1189 | -name '*.[chS]' -print )
|
---|
| 1190 | endef
|
---|
[821] | 1191 |
|
---|
[1765] | 1192 | quiet_cmd_cscope-file = FILELST cscope.files
|
---|
| 1193 | cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
|
---|
[821] | 1194 |
|
---|
[1765] | 1195 | quiet_cmd_cscope = MAKE cscope.out
|
---|
| 1196 | cmd_cscope = cscope -b
|
---|
[821] | 1197 |
|
---|
[1765] | 1198 | cscope: FORCE
|
---|
| 1199 | $(call cmd,cscope-file)
|
---|
| 1200 | $(call cmd,cscope)
|
---|
[821] | 1201 |
|
---|
[1765] | 1202 | quiet_cmd_TAGS = MAKE $@
|
---|
| 1203 | define cmd_TAGS
|
---|
| 1204 | rm -f $@; \
|
---|
| 1205 | ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
|
---|
| 1206 | echo "-I __initdata,__exitdata,__acquires,__releases \
|
---|
| 1207 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
|
---|
| 1208 | --extra=+f --c-kinds=+px"`; \
|
---|
| 1209 | $(all-sources) | xargs etags $$ETAGSF -a
|
---|
| 1210 | endef
|
---|
[821] | 1211 |
|
---|
[1765] | 1212 | TAGS: FORCE
|
---|
| 1213 | $(call cmd,TAGS)
|
---|
[821] | 1214 |
|
---|
| 1215 |
|
---|
[1765] | 1216 | quiet_cmd_tags = MAKE $@
|
---|
| 1217 | define cmd_tags
|
---|
| 1218 | rm -f $@; \
|
---|
| 1219 | CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
|
---|
| 1220 | echo "-I __initdata,__exitdata,__acquires,__releases \
|
---|
| 1221 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
|
---|
| 1222 | --extra=+f --c-kinds=+px"`; \
|
---|
| 1223 | $(all-sources) | xargs ctags $$CTAGSF -a
|
---|
| 1224 | endef
|
---|
[821] | 1225 |
|
---|
[1765] | 1226 | tags: FORCE
|
---|
| 1227 | $(call cmd,tags)
|
---|
[821] | 1228 |
|
---|
| 1229 |
|
---|
[1765] | 1230 | # Scripts to check various things for consistency
|
---|
| 1231 | # ---------------------------------------------------------------------------
|
---|
[821] | 1232 |
|
---|
[1765] | 1233 | includecheck:
|
---|
| 1234 | find * $(RCS_FIND_IGNORE) \
|
---|
| 1235 | -name '*.[hcS]' -type f -print | sort \
|
---|
| 1236 | | xargs $(PERL) -w scripts/checkincludes.pl
|
---|
[821] | 1237 |
|
---|
[1765] | 1238 | versioncheck:
|
---|
| 1239 | find * $(RCS_FIND_IGNORE) \
|
---|
| 1240 | -name '*.[hcS]' -type f -print | sort \
|
---|
| 1241 | | xargs $(PERL) -w scripts/checkversion.pl
|
---|
[821] | 1242 |
|
---|
[1765] | 1243 | namespacecheck:
|
---|
| 1244 | $(PERL) $(srctree)/scripts/namespace.pl
|
---|
[821] | 1245 |
|
---|
[1765] | 1246 | endif #ifeq ($(config-targets),1)
|
---|
| 1247 | endif #ifeq ($(mixed-targets),1)
|
---|
| 1248 |
|
---|
| 1249 | PHONY += checkstack
|
---|
| 1250 | checkstack:
|
---|
| 1251 | $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \
|
---|
| 1252 | $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
|
---|
| 1253 |
|
---|
| 1254 | kernelrelease:
|
---|
| 1255 | $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
|
---|
| 1256 | $(error kernelrelease not valid - run 'make *config' to update it))
|
---|
| 1257 | kernelversion:
|
---|
| 1258 | @echo $(KERNELVERSION)
|
---|
| 1259 |
|
---|
| 1260 | # Single targets
|
---|
| 1261 | # ---------------------------------------------------------------------------
|
---|
| 1262 | # Single targets are compatible with:
|
---|
| 1263 | # - build whith mixed source and output
|
---|
| 1264 | # - build with separate output dir 'make O=...'
|
---|
| 1265 | # - external modules
|
---|
| 1266 | #
|
---|
| 1267 | # target-dir => where to store outputfile
|
---|
| 1268 | # build-dir => directory in kernel source tree to use
|
---|
| 1269 |
|
---|
| 1270 | ifeq ($(KBUILD_EXTMOD),)
|
---|
| 1271 | build-dir = $(patsubst %/,%,$(dir $@))
|
---|
| 1272 | target-dir = $(dir $@)
|
---|
| 1273 | else
|
---|
| 1274 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
|
---|
| 1275 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
|
---|
| 1276 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
|
---|
[821] | 1277 | endif
|
---|
| 1278 |
|
---|
[1765] | 1279 | %.s: %.c prepare scripts FORCE
|
---|
| 1280 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
---|
| 1281 | %.i: %.c prepare scripts FORCE
|
---|
| 1282 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
---|
| 1283 | %.o: %.c prepare scripts FORCE
|
---|
| 1284 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
---|
| 1285 | %.lst: %.c prepare scripts FORCE
|
---|
| 1286 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
---|
| 1287 | %.s: %.S prepare scripts FORCE
|
---|
| 1288 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
---|
| 1289 | %.o: %.S prepare scripts FORCE
|
---|
| 1290 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
|
---|
[821] | 1291 |
|
---|
[1765] | 1292 | # Modules
|
---|
[2725] | 1293 | %/: prepare scripts FORCE
|
---|
[1765] | 1294 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
|
---|
| 1295 | $(build)=$(build-dir)
|
---|
[2725] | 1296 | /: prepare scripts FORCE
|
---|
| 1297 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
|
---|
| 1298 | $(build)=$(build-dir)
|
---|
| 1299 |
|
---|
[1765] | 1300 | %.ko: prepare scripts FORCE
|
---|
| 1301 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
|
---|
| 1302 | $(build)=$(build-dir) $(@:.ko=.o)
|
---|
| 1303 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
|
---|
[821] | 1304 |
|
---|
[1765] | 1305 | # FIXME Should go into a make.lib or something
|
---|
| 1306 | # ===========================================================================
|
---|
[821] | 1307 |
|
---|
[1765] | 1308 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
|
---|
| 1309 | cmd_rmdirs = rm -rf $(rm-dirs)
|
---|
[821] | 1310 |
|
---|
[1765] | 1311 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
|
---|
| 1312 | cmd_rmfiles = rm -f $(rm-files)
|
---|
[821] | 1313 |
|
---|
| 1314 |
|
---|
[1765] | 1315 | a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
|
---|
| 1316 | $(NOSTDINC_FLAGS) $(CPPFLAGS) \
|
---|
| 1317 | $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
|
---|
[821] | 1318 |
|
---|
[1765] | 1319 | quiet_cmd_as_o_S = AS $@
|
---|
| 1320 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
|
---|
[821] | 1321 |
|
---|
[1765] | 1322 | # read all saved command lines
|
---|
[821] | 1323 |
|
---|
[1765] | 1324 | targets := $(wildcard $(sort $(targets)))
|
---|
| 1325 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
|
---|
[821] | 1326 |
|
---|
[1765] | 1327 | ifneq ($(cmd_files),)
|
---|
| 1328 | $(cmd_files): ; # Do not try to update included dependency files
|
---|
| 1329 | include $(cmd_files)
|
---|
| 1330 | endif
|
---|
[821] | 1331 |
|
---|
[1765] | 1332 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
|
---|
| 1333 | # Usage:
|
---|
| 1334 | # $(Q)$(MAKE) $(clean)=dir
|
---|
| 1335 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
|
---|
[821] | 1336 |
|
---|
[1765] | 1337 | endif # skip-makefile
|
---|
[821] | 1338 |
|
---|
[1765] | 1339 | PHONY += FORCE
|
---|
| 1340 | FORCE:
|
---|
[821] | 1341 |
|
---|
[1765] | 1342 | -include $(srctree)/Makefile.custom
|
---|
| 1343 |
|
---|
| 1344 | # Declare the contents of the .PHONY variable as phony. We keep that
|
---|
| 1345 | # information in a variable se we can use it in if_changed and friends.
|
---|
| 1346 | .PHONY: $(PHONY)
|
---|