| 1 | VERSION = 1 |
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| 2 | PATCHLEVEL = 7 |
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| 3 | SUBLEVEL = 2 |
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| 4 | EXTRAVERSION = |
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| 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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| 18 | # |
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| 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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| 26 | # |
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| 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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| 31 | |
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| 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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| 34 | |
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| 35 | ifdef V |
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| 36 | ifeq ("$(origin V)", "command line") |
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| 37 | KBUILD_VERBOSE = $(V) |
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| 38 | endif |
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| 39 | endif |
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| 40 | ifndef KBUILD_VERBOSE |
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| 41 | KBUILD_VERBOSE = 0 |
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| 42 | endif |
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| 43 | |
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| 44 | # Call sparse as part of compilation of C files |
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| 45 | # Use 'make C=1' to enable sparse checking |
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| 46 | |
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| 47 | ifdef C |
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| 48 | ifeq ("$(origin C)", "command line") |
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| 49 | KBUILD_CHECKSRC = $(C) |
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| 50 | endif |
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| 51 | endif |
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| 52 | ifndef KBUILD_CHECKSRC |
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| 53 | KBUILD_CHECKSRC = 0 |
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| 54 | endif |
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| 55 | |
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| 56 | # Use make M=dir to specify directory of external module to build |
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| 57 | # Old syntax make ... SUBDIRS=$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 ?= $(SUBDIRS) |
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| 61 | endif |
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| 62 | ifdef M |
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| 63 | ifeq ("$(origin M)", "command line") |
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| 64 | KBUILD_EXTMOD := $(M) |
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| 65 | endif |
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| 66 | endif |
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| 67 | |
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| 68 | |
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| 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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| 83 | |
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| 84 | |
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| 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 := $(O) |
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| 94 | endif |
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| 95 | endif |
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| 96 | |
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| 97 | # That's our default target when none is given on the command line |
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| 98 | PHONY := _all |
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| 99 | _all: |
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| 100 | |
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| 101 | ifneq ($(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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| 108 | |
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| 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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| 129 | else |
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| 130 | _all: modules |
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| 131 | endif |
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| 132 | |
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| 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 | # SUBARCH tells the usermode build what the underlying arch is. That is set |
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| 146 | # first, and if a usermode build is happening, the "ARCH=um" on the command |
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| 147 | # line overrides the setting of ARCH below. If a native build is happening, |
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| 148 | # then ARCH is assigned, getting whatever value it gets normally, and |
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| 149 | # SUBARCH is subsequently ignored. |
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| 150 | |
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| 151 | SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ |
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| 152 | -e s/arm.*/arm/ -e s/sa110/arm/ \ |
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| 153 | -e s/s390x/s390/ -e s/parisc64/parisc/ \ |
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| 154 | -e s/ppc.*/powerpc/ -e s/mips.*/mips/ ) |
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| 155 | |
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| 156 | # Cross compiling and selecting different set of gcc/bin-utils |
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| 157 | # --------------------------------------------------------------------------- |
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| 158 | # |
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| 159 | # When performing cross compilation for other architectures ARCH shall be set |
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| 160 | # to the target architecture. (See arch/* for the possibilities). |
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| 161 | # ARCH can be set during invocation of make: |
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| 162 | # make ARCH=ia64 |
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| 163 | # Another way is to have ARCH set in the environment. |
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| 164 | # The default ARCH is the host where make is executed. |
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| 165 | |
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| 166 | # CROSS_COMPILE specify the prefix used for all executables used |
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| 167 | # during compilation. Only gcc and related bin-utils executables |
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| 168 | # are prefixed with $(CROSS_COMPILE). |
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| 169 | # CROSS_COMPILE can be set on the command line |
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| 170 | # make CROSS_COMPILE=ia64-linux- |
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| 171 | # Alternatively CROSS_COMPILE can be set in the environment. |
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| 172 | # Default value for CROSS_COMPILE is not to prefix executables |
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| 173 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile |
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| 174 | |
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| 175 | ARCH ?= $(SUBARCH) |
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| 176 | CROSS_COMPILE ?= |
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| 177 | |
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| 178 | # Architecture as present in compile.h |
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| 179 | UTS_MACHINE := $(ARCH) |
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| 180 | |
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| 181 | # SHELL used by kbuild |
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| 182 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ |
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| 183 | else if [ -x /bin/bash ]; then echo /bin/bash; \ |
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| 184 | else echo sh; fi ; fi) |
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| 185 | |
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| 186 | # Decide whether to build built-in, modular, or both. |
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| 187 | # Normally, just do built-in. |
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| 188 | |
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| 189 | KBUILD_MODULES := |
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| 190 | KBUILD_BUILTIN := 1 |
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| 191 | |
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| 192 | # If we have only "make modules", don't compile built-in objects. |
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| 193 | # When we're building modules with modversions, we need to consider |
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| 194 | # the built-in objects during the descend as well, in order to |
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| 195 | # make sure the checksums are uptodate before we record them. |
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| 196 | |
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| 197 | ifeq ($(MAKECMDGOALS),modules) |
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| 198 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) |
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| 199 | endif |
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| 200 | |
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| 201 | # If we have "make <whatever> modules", compile modules |
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| 202 | # in addition to whatever we do anyway. |
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| 203 | # Just "make" or "make all" shall build modules as well |
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| 204 | |
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| 205 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) |
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| 206 | KBUILD_MODULES := 1 |
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| 207 | endif |
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| 208 | |
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| 209 | ifeq ($(MAKECMDGOALS),) |
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| 210 | KBUILD_MODULES := 1 |
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| 211 | endif |
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| 212 | |
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| 213 | export KBUILD_MODULES KBUILD_BUILTIN |
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| 214 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD |
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| 215 | |
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| 216 | # Beautify output |
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| 217 | # --------------------------------------------------------------------------- |
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| 218 | # |
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| 219 | # Normally, we echo the whole command before executing it. By making |
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| 220 | # that echo $($(quiet)$(cmd)), we now have the possibility to set |
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| 221 | # $(quiet) to choose other forms of output instead, e.g. |
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| 222 | # |
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| 223 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ |
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| 224 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
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| 225 | # |
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| 226 | # If $(quiet) is empty, the whole command will be printed. |
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| 227 | # If it is set to "quiet_", only the short version will be printed. |
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| 228 | # If it is set to "silent_", nothing wil be printed at all, since |
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| 229 | # the variable $(silent_cmd_cc_o_c) doesn't exist. |
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| 230 | # |
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| 231 | # A simple variant is to prefix commands with $(Q) - that's useful |
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| 232 | # for commands that shall be hidden in non-verbose mode. |
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| 233 | # |
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| 234 | # $(Q)ln $@ :< |
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| 235 | # |
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| 236 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. |
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| 237 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. |
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| 238 | |
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| 239 | ifeq ($(KBUILD_VERBOSE),1) |
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| 240 | quiet = |
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| 241 | Q = |
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| 242 | else |
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| 243 | quiet=quiet_ |
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| 244 | Q = @ |
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| 245 | endif |
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| 246 | |
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| 247 | # If the user is running make -s (silent mode), suppress echoing of |
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| 248 | # commands |
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| 249 | |
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| 250 | ifneq ($(findstring s,$(MAKEFLAGS)),) |
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| 251 | quiet=silent_ |
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| 252 | endif |
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| 253 | |
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| 254 | export quiet Q KBUILD_VERBOSE |
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| 255 | |
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| 256 | |
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| 257 | # Look for make include files relative to root of kernel src |
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| 258 | MAKEFLAGS += --include-dir=$(srctree) |
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| 259 | |
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| 260 | HOSTCC = gcc |
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| 261 | HOSTCXX = g++ |
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| 262 | HOSTCFLAGS := |
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| 263 | HOSTCXXFLAGS := |
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| 264 | # We need some generic definitions |
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| 265 | include $(srctree)/scripts/Kbuild.include |
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| 266 | |
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| 267 | HOSTCFLAGS += $(call hostcc-option,-Wall -Wstrict-prototypes -O2 -fomit-frame-pointer,) |
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| 268 | HOSTCXXFLAGS += -O2 |
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| 269 | |
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| 270 | # For maximum performance (+ possibly random breakage, uncomment |
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| 271 | # the following) |
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| 272 | |
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| 273 | MAKEFLAGS += -rR |
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| 274 | |
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| 275 | # Make variables (CC, etc...) |
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| 276 | |
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| 277 | AS = $(CROSS_COMPILE)as |
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| 278 | CC = $(CROSS_COMPILE)gcc |
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| 279 | LD = $(CC) -nostdlib |
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| 280 | CPP = $(CC) -E |
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| 281 | AR = $(CROSS_COMPILE)ar |
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| 282 | NM = $(CROSS_COMPILE)nm |
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| 283 | STRIP = $(CROSS_COMPILE)strip |
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| 284 | OBJCOPY = $(CROSS_COMPILE)objcopy |
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| 285 | OBJDUMP = $(CROSS_COMPILE)objdump |
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| 286 | AWK = awk |
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| 287 | GENKSYMS = scripts/genksyms/genksyms |
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| 288 | DEPMOD = /sbin/depmod |
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| 289 | KALLSYMS = scripts/kallsyms |
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| 290 | PERL = perl |
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| 291 | CHECK = sparse |
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| 292 | |
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| 293 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) |
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| 294 | MODFLAGS = -DMODULE |
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| 295 | CFLAGS_MODULE = $(MODFLAGS) |
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| 296 | AFLAGS_MODULE = $(MODFLAGS) |
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| 297 | LDFLAGS_MODULE = -r |
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| 298 | CFLAGS_KERNEL = |
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| 299 | AFLAGS_KERNEL = |
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| 300 | |
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| 301 | |
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| 302 | # Use LINUXINCLUDE when you must reference the include/ directory. |
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| 303 | # Needed to be compatible with the O= option |
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| 304 | CFLAGS := $(CFLAGS) |
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| 305 | CPPFLAGS := $(CPPFLAGS) |
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| 306 | AFLAGS := $(AFLAGS) |
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| 307 | LDFLAGS := $(LDFLAGS) |
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| 308 | LDLIBS := |
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| 309 | |
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| 310 | # Read KERNELRELEASE from .kernelrelease (if it exists) |
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| 311 | KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null) |
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| 312 | KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) |
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| 313 | |
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| 314 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \ |
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| 315 | ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ |
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| 316 | CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ |
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| 317 | HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
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| 318 | |
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| 319 | export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS |
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| 320 | export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
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| 321 | export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
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| 322 | export FLTFLAGS |
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| 323 | |
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| 324 | # When compiling out-of-tree modules, put MODVERDIR in the module |
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| 325 | # tree rather than in the kernel tree. The kernel tree might |
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| 326 | # even be read-only. |
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| 327 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions |
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| 328 | |
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| 329 | # Files to ignore in find ... statements |
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| 330 | |
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| 331 | 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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| 332 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git |
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| 333 | |
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| 334 | # =========================================================================== |
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| 335 | # Rules shared between *config targets and build targets |
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| 336 | |
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| 337 | # Basic helpers built in scripts/ |
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| 338 | PHONY += scripts_basic |
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| 339 | scripts_basic: |
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| 340 | $(Q)$(MAKE) $(build)=scripts/basic |
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| 341 | |
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| 342 | # To avoid any implicit rule to kick in, define an empty command. |
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| 343 | scripts/basic/%: scripts_basic ; |
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| 344 | |
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| 345 | PHONY += outputmakefile |
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| 346 | # outputmakefile generates a Makefile in the output directory, if using a |
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| 347 | # separate output directory. This allows convenient use of make in the |
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| 348 | # output directory. |
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| 349 | outputmakefile: |
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| 350 | ifneq ($(KBUILD_SRC),) |
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| 351 | $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ |
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| 352 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) |
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| 353 | endif |
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| 354 | |
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| 355 | # To make sure we do not include .config for any of the *config targets |
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| 356 | # catch them early, and hand them over to scripts/kconfig/Makefile |
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| 357 | # It is allowed to specify more targets when calling make, including |
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| 358 | # mixing *config targets and build targets. |
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| 359 | # For example 'make oldconfig all'. |
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| 360 | # Detect when mixed targets is specified, and make a second invocation |
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| 361 | # of make so .config is not included in this case either (for *config). |
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| 362 | |
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| 363 | no-dot-config-targets := clean mrproper distclean \ |
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| 364 | cscope TAGS tags help %docs check% |
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| 365 | |
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| 366 | config-targets := 0 |
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| 367 | mixed-targets := 0 |
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| 368 | dot-config := 1 |
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| 369 | |
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| 370 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) |
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| 371 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) |
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| 372 | dot-config := 0 |
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| 373 | endif |
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| 374 | endif |
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| 375 | |
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| 376 | ifeq ($(KBUILD_EXTMOD),) |
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| 377 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) |
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| 378 | config-targets := 1 |
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| 379 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) |
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| 380 | mixed-targets := 1 |
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| 381 | endif |
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| 382 | endif |
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| 383 | endif |
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| 384 | |
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| 385 | ifeq ($(mixed-targets),1) |
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| 386 | # =========================================================================== |
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| 387 | # We're called with mixed targets (*config and build targets). |
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| 388 | # Handle them one by one. |
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| 389 | |
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| 390 | %:: FORCE |
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| 391 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ |
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| 392 | |
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| 393 | else |
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| 394 | ifeq ($(config-targets),1) |
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| 395 | # =========================================================================== |
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| 396 | # *config targets only - make sure prerequisites are updated, and descend |
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| 397 | # in scripts/kconfig to make the *config target |
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| 398 | |
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| 399 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. |
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| 400 | # KBUILD_DEFCONFIG may point out an alternative default configuration |
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| 401 | # used for 'make defconfig' |
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| 402 | -include $(srctree)/arch/$(ARCH)/Makefile |
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| 403 | export KBUILD_DEFCONFIG |
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| 404 | |
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| 405 | config %config: scripts_basic outputmakefile FORCE |
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| 406 | $(Q)mkdir -p include |
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| 407 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
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| 408 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease |
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| 409 | |
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| 410 | else |
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| 411 | # =========================================================================== |
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| 412 | # Build targets only - this includes busybox, arch specific targets, clean |
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| 413 | # targets and others. In general all targets except *config targets. |
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| 414 | |
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| 415 | ifeq ($(KBUILD_EXTMOD),) |
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| 416 | # Additional helpers built in scripts/ |
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| 417 | # Carefully list dependencies so we do not try to build scripts twice |
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| 418 | # in parrallel |
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| 419 | PHONY += scripts |
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| 420 | scripts: scripts_basic include/config/MARKER |
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| 421 | $(Q)$(MAKE) $(build)=$(@) |
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| 422 | |
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| 423 | scripts_basic: include/autoconf.h |
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| 424 | |
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| 425 | # Objects we will link into busybox / subdirs we need to visit |
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| 426 | core-y := \ |
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| 427 | applets/ \ |
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| 428 | |
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| 429 | libs-y := \ |
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| 430 | archival/ \ |
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| 431 | archival/libunarchive/ \ |
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| 432 | console-tools/ \ |
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| 433 | coreutils/ \ |
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| 434 | coreutils/libcoreutils/ \ |
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| 435 | debianutils/ \ |
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| 436 | e2fsprogs/ \ |
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| 437 | editors/ \ |
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| 438 | findutils/ \ |
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| 439 | init/ \ |
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| 440 | ipsvd/ \ |
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| 441 | libbb/ \ |
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| 442 | libpwdgrp/ \ |
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| 443 | loginutils/ \ |
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| 444 | miscutils/ \ |
|---|
| 445 | modutils/ \ |
|---|
| 446 | networking/ \ |
|---|
| 447 | networking/libiproute/ \ |
|---|
| 448 | networking/udhcp/ \ |
|---|
| 449 | procps/ \ |
|---|
| 450 | runit/ \ |
|---|
| 451 | selinux/ \ |
|---|
| 452 | shell/ \ |
|---|
| 453 | sysklogd/ \ |
|---|
| 454 | util-linux/ \ |
|---|
| 455 | |
|---|
| 456 | endif # KBUILD_EXTMOD |
|---|
| 457 | |
|---|
| 458 | ifeq ($(dot-config),1) |
|---|
| 459 | # In this section, we need .config |
|---|
| 460 | |
|---|
| 461 | # Read in dependencies to all Kconfig* files, make sure to run |
|---|
| 462 | # oldconfig if changes are detected. |
|---|
| 463 | -include .kconfig.d |
|---|
| 464 | |
|---|
| 465 | -include .config |
|---|
| 466 | |
|---|
| 467 | # If .config needs to be updated, it will be done via the dependency |
|---|
| 468 | # that autoconf has on .config. |
|---|
| 469 | # To avoid any implicit rule to kick in, define an empty command |
|---|
| 470 | .config .kconfig.d: ; |
|---|
| 471 | |
|---|
| 472 | # Now we can define CFLAGS etc according to .config |
|---|
| 473 | include $(srctree)/Makefile.flags |
|---|
| 474 | |
|---|
| 475 | # If .config is newer than include/autoconf.h, someone tinkered |
|---|
| 476 | # with it and forgot to run make oldconfig. |
|---|
| 477 | # If kconfig.d is missing then we are probarly in a cleaned tree so |
|---|
| 478 | # we execute the config step to be sure to catch updated Kconfig files |
|---|
| 479 | include/autoconf.h: .kconfig.d .config |
|---|
| 480 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig |
|---|
| 481 | |
|---|
| 482 | else |
|---|
| 483 | # Dummy target needed, because used as prerequisite |
|---|
| 484 | include/autoconf.h: ; |
|---|
| 485 | endif |
|---|
| 486 | |
|---|
| 487 | # The all: target is the default when no target is given on the |
|---|
| 488 | # command line. |
|---|
| 489 | # This allow a user to issue only 'make' to build a kernel including modules |
|---|
| 490 | # Defaults busybox but it is usually overridden in the arch makefile |
|---|
| 491 | all: busybox |
|---|
| 492 | |
|---|
| 493 | -include $(srctree)/arch/$(ARCH)/Makefile |
|---|
| 494 | |
|---|
| 495 | # arch Makefile may override CC so keep this after arch Makefile is included |
|---|
| 496 | #bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
|---|
| 497 | CHECKFLAGS += $(NOSTDINC_FLAGS) |
|---|
| 498 | |
|---|
| 499 | # warn about C99 declaration after statement |
|---|
| 500 | CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) |
|---|
| 501 | |
|---|
| 502 | # disable pointer signedness warnings in gcc 4.0 |
|---|
| 503 | CFLAGS += $(call cc-option,-Wno-pointer-sign,) |
|---|
| 504 | |
|---|
| 505 | # Default kernel image to build when no specific target is given. |
|---|
| 506 | # KBUILD_IMAGE may be overruled on the commandline or |
|---|
| 507 | # set in the environment |
|---|
| 508 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over |
|---|
| 509 | # this default value |
|---|
| 510 | export KBUILD_IMAGE ?= busybox |
|---|
| 511 | |
|---|
| 512 | # |
|---|
| 513 | # INSTALL_PATH specifies where to place the updated kernel and system map |
|---|
| 514 | # images. Default is /boot, but you can set it to other values |
|---|
| 515 | export INSTALL_PATH ?= /boot |
|---|
| 516 | |
|---|
| 517 | # |
|---|
| 518 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory |
|---|
| 519 | # relocations required by build roots. This is not defined in the |
|---|
| 520 | # makefile but the arguement can be passed to make if needed. |
|---|
| 521 | # |
|---|
| 522 | |
|---|
| 523 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
|---|
| 524 | export MODLIB |
|---|
| 525 | |
|---|
| 526 | |
|---|
| 527 | ifeq ($(KBUILD_EXTMOD),) |
|---|
| 528 | busybox-dirs := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m))) |
|---|
| 529 | |
|---|
| 530 | busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \ |
|---|
| 531 | $(core-n) $(core-) $(libs-n) $(libs-) \ |
|---|
| 532 | ))) |
|---|
| 533 | |
|---|
| 534 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) |
|---|
| 535 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) |
|---|
| 536 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) |
|---|
| 537 | libs-y := $(libs-y1) $(libs-y2) |
|---|
| 538 | |
|---|
| 539 | # Build busybox |
|---|
| 540 | # --------------------------------------------------------------------------- |
|---|
| 541 | # busybox is build from the objects selected by $(busybox-init) and |
|---|
| 542 | # $(busybox-main). Most are built-in.o files from top-level directories |
|---|
| 543 | # in the kernel tree, others are specified in arch/$(ARCH)Makefile. |
|---|
| 544 | # Ordering when linking is important, and $(busybox-init) must be first. |
|---|
| 545 | # |
|---|
| 546 | # busybox |
|---|
| 547 | # ^ |
|---|
| 548 | # | |
|---|
| 549 | # +-< $(busybox-init) |
|---|
| 550 | # | +--< init/version.o + more |
|---|
| 551 | # | |
|---|
| 552 | # +--< $(busybox-main) |
|---|
| 553 | # | +--< driver/built-in.o mm/built-in.o + more |
|---|
| 554 | # | |
|---|
| 555 | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section) |
|---|
| 556 | # |
|---|
| 557 | # busybox version (uname -v) cannot be updated during normal |
|---|
| 558 | # descending-into-subdirs phase since we do not yet know if we need to |
|---|
| 559 | # update busybox. |
|---|
| 560 | # Therefore this step is delayed until just before final link of busybox - |
|---|
| 561 | # except in the kallsyms case where it is done just before adding the |
|---|
| 562 | # symbols to the kernel. |
|---|
| 563 | # |
|---|
| 564 | # System.map is generated to document addresses of all kernel symbols |
|---|
| 565 | |
|---|
| 566 | busybox-all := $(core-y) $(libs-y) |
|---|
| 567 | |
|---|
| 568 | # Rule to link busybox - also used during CONFIG_KALLSYMS |
|---|
| 569 | # May be overridden by arch/$(ARCH)/Makefile |
|---|
| 570 | quiet_cmd_busybox__ ?= LINK $@ |
|---|
| 571 | cmd_busybox__ ?= $(srctree)/scripts/trylink $(CC) $(LDFLAGS) \ |
|---|
| 572 | -o $@ -Wl,-Map -Wl,$@.map \ |
|---|
| 573 | -Wl,--warn-common -Wl,--sort-common \ |
|---|
| 574 | -Wl,--start-group $(busybox-all) -Wl,--end-group \ |
|---|
| 575 | $(LDLIBS) |
|---|
| 576 | |
|---|
| 577 | # Generate System.map |
|---|
| 578 | quiet_cmd_sysmap = SYSMAP |
|---|
| 579 | cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap |
|---|
| 580 | |
|---|
| 581 | # Link of busybox |
|---|
| 582 | # If CONFIG_KALLSYMS is set .version is already updated |
|---|
| 583 | # Generate System.map and verify that the content is consistent |
|---|
| 584 | # Use + in front of the busybox_version rule to silent warning with make -j2 |
|---|
| 585 | # First command is ':' to allow us to use + in front of the rule |
|---|
| 586 | define rule_busybox__ |
|---|
| 587 | : |
|---|
| 588 | $(call cmd,busybox__) |
|---|
| 589 | $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd |
|---|
| 590 | endef |
|---|
| 591 | |
|---|
| 592 | |
|---|
| 593 | ifdef CONFIG_KALLSYMS |
|---|
| 594 | # Generate section listing all symbols and add it into busybox $(kallsyms.o) |
|---|
| 595 | # It's a three stage process: |
|---|
| 596 | # o .tmp_busybox1 has all symbols and sections, but __kallsyms is |
|---|
| 597 | # empty |
|---|
| 598 | # Running kallsyms on that gives us .tmp_kallsyms1.o with |
|---|
| 599 | # the right size - busybox version (uname -v) is updated during this step |
|---|
| 600 | # o .tmp_busybox2 now has a __kallsyms section of the right size, |
|---|
| 601 | # but due to the added section, some addresses have shifted. |
|---|
| 602 | # From here, we generate a correct .tmp_kallsyms2.o |
|---|
| 603 | # o The correct .tmp_kallsyms2.o is linked into the final busybox. |
|---|
| 604 | # o Verify that the System.map from busybox matches the map from |
|---|
| 605 | # .tmp_busybox2, just in case we did not generate kallsyms correctly. |
|---|
| 606 | # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using |
|---|
| 607 | # .tmp_busybox3 and .tmp_kallsyms3.o. This is only meant as a |
|---|
| 608 | # temporary bypass to allow the kernel to be built while the |
|---|
| 609 | # maintainers work out what went wrong with kallsyms. |
|---|
| 610 | |
|---|
| 611 | ifdef CONFIG_KALLSYMS_EXTRA_PASS |
|---|
| 612 | last_kallsyms := 3 |
|---|
| 613 | else |
|---|
| 614 | last_kallsyms := 2 |
|---|
| 615 | endif |
|---|
| 616 | |
|---|
| 617 | kallsyms.o := .tmp_kallsyms$(last_kallsyms).o |
|---|
| 618 | |
|---|
| 619 | define verify_kallsyms |
|---|
| 620 | $(Q)$(if $($(quiet)cmd_sysmap), \ |
|---|
| 621 | echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ |
|---|
| 622 | $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map |
|---|
| 623 | $(Q)cmp -s System.map .tmp_System.map || \ |
|---|
| 624 | (echo Inconsistent kallsyms data; \ |
|---|
| 625 | echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ |
|---|
| 626 | rm .tmp_kallsyms* ; /bin/false ) |
|---|
| 627 | endef |
|---|
| 628 | |
|---|
| 629 | # Update busybox version before link |
|---|
| 630 | # Use + in front of this rule to silent warning about make -j1 |
|---|
| 631 | # First command is ':' to allow us to use + in front of this rule |
|---|
| 632 | cmd_ksym_ld = $(cmd_busybox__) |
|---|
| 633 | define rule_ksym_ld |
|---|
| 634 | : |
|---|
| 635 | +$(call cmd,busybox_version) |
|---|
| 636 | $(call cmd,busybox__) |
|---|
| 637 | $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd |
|---|
| 638 | endef |
|---|
| 639 | |
|---|
| 640 | # Generate .S file with all kernel symbols |
|---|
| 641 | quiet_cmd_kallsyms = KSYM $@ |
|---|
| 642 | cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ |
|---|
| 643 | $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ |
|---|
| 644 | |
|---|
| 645 | .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE |
|---|
| 646 | $(call if_changed_dep,as_o_S) |
|---|
| 647 | |
|---|
| 648 | .tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS) |
|---|
| 649 | $(call cmd,kallsyms) |
|---|
| 650 | |
|---|
| 651 | # .tmp_busybox1 must be complete except kallsyms, so update busybox version |
|---|
| 652 | .tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE |
|---|
| 653 | $(call if_changed_rule,ksym_ld) |
|---|
| 654 | |
|---|
| 655 | .tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE |
|---|
| 656 | $(call if_changed,busybox__) |
|---|
| 657 | |
|---|
| 658 | .tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE |
|---|
| 659 | $(call if_changed,busybox__) |
|---|
| 660 | |
|---|
| 661 | # Needs to visit scripts/ before $(KALLSYMS) can be used. |
|---|
| 662 | $(KALLSYMS): scripts ; |
|---|
| 663 | |
|---|
| 664 | # Generate some data for debugging strange kallsyms problems |
|---|
| 665 | debug_kallsyms: .tmp_map$(last_kallsyms) |
|---|
| 666 | |
|---|
| 667 | .tmp_map%: .tmp_busybox% FORCE |
|---|
| 668 | ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ |
|---|
| 669 | |
|---|
| 670 | .tmp_map3: .tmp_map2 |
|---|
| 671 | |
|---|
| 672 | .tmp_map2: .tmp_map1 |
|---|
| 673 | |
|---|
| 674 | endif # ifdef CONFIG_KALLSYMS |
|---|
| 675 | |
|---|
| 676 | # busybox image - including updated kernel symbols |
|---|
| 677 | busybox_unstripped: $(busybox-all) FORCE |
|---|
| 678 | $(call if_changed_rule,busybox__) |
|---|
| 679 | $(Q)rm -f .old_version |
|---|
| 680 | |
|---|
| 681 | busybox: busybox_unstripped |
|---|
| 682 | ifeq ($(SKIP_STRIP),y) |
|---|
| 683 | $(Q)cp $< $@ |
|---|
| 684 | else |
|---|
| 685 | $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \ |
|---|
| 686 | busybox_unstripped -o $@ |
|---|
| 687 | endif |
|---|
| 688 | |
|---|
| 689 | # The actual objects are generated when descending, |
|---|
| 690 | # make sure no implicit rule kicks in |
|---|
| 691 | $(sort $(busybox-all)): $(busybox-dirs) ; |
|---|
| 692 | |
|---|
| 693 | # Handle descending into subdirectories listed in $(busybox-dirs) |
|---|
| 694 | # Preset locale variables to speed up the build process. Limit locale |
|---|
| 695 | # tweaks to this spot to avoid wrong language settings when running |
|---|
| 696 | # make menuconfig etc. |
|---|
| 697 | # Error messages still appears in the original language |
|---|
| 698 | |
|---|
| 699 | PHONY += $(busybox-dirs) |
|---|
| 700 | $(busybox-dirs): prepare scripts |
|---|
| 701 | $(Q)$(MAKE) $(build)=$@ |
|---|
| 702 | |
|---|
| 703 | # Build the kernel release string |
|---|
| 704 | # The KERNELRELEASE is stored in a file named .kernelrelease |
|---|
| 705 | # to be used when executing for example make install or make modules_install |
|---|
| 706 | # |
|---|
| 707 | # Take the contents of any files called localversion* and the config |
|---|
| 708 | # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. |
|---|
| 709 | # LOCALVERSION from the command line override all of this |
|---|
| 710 | |
|---|
| 711 | nullstring := |
|---|
| 712 | space := $(nullstring) # end of line |
|---|
| 713 | |
|---|
| 714 | ___localver = $(objtree)/localversion* $(srctree)/localversion* |
|---|
| 715 | __localver = $(sort $(wildcard $(___localver))) |
|---|
| 716 | # skip backup files (containing '~') |
|---|
| 717 | _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) |
|---|
| 718 | |
|---|
| 719 | localver = $(subst $(space),, \ |
|---|
| 720 | $(shell cat /dev/null $(_localver)) \ |
|---|
| 721 | $(patsubst "%",%,$(CONFIG_LOCALVERSION))) |
|---|
| 722 | |
|---|
| 723 | # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called |
|---|
| 724 | # and if the SCM is know a tag from the SCM is appended. |
|---|
| 725 | # The appended tag is determinded by the SCM used. |
|---|
| 726 | # |
|---|
| 727 | # Currently, only git is supported. |
|---|
| 728 | # Other SCMs can edit scripts/setlocalversion and add the appropriate |
|---|
| 729 | # checks as needed. |
|---|
| 730 | ifdef CONFIG_LOCALVERSION_AUTO |
|---|
| 731 | _localver-auto = $(shell $(CONFIG_SHELL) \ |
|---|
| 732 | $(srctree)/scripts/setlocalversion $(srctree)) |
|---|
| 733 | localver-auto = $(LOCALVERSION)$(_localver-auto) |
|---|
| 734 | endif |
|---|
| 735 | |
|---|
| 736 | localver-full = $(localver)$(localver-auto) |
|---|
| 737 | |
|---|
| 738 | # Store (new) KERNELRELASE string in .kernelrelease |
|---|
| 739 | kernelrelease = $(KERNELVERSION)$(localver-full) |
|---|
| 740 | .kernelrelease: FORCE |
|---|
| 741 | $(Q)rm -f $@ |
|---|
| 742 | $(Q)echo $(kernelrelease) > $@ |
|---|
| 743 | |
|---|
| 744 | |
|---|
| 745 | # Things we need to do before we recursively start building the kernel |
|---|
| 746 | # or the modules are listed in "prepare". |
|---|
| 747 | # A multi level approach is used. prepareN is processed before prepareN-1. |
|---|
| 748 | # archprepare is used in arch Makefiles and when processed asm symlink, |
|---|
| 749 | # version.h and scripts_basic is processed / created. |
|---|
| 750 | |
|---|
| 751 | # Listed in dependency order |
|---|
| 752 | PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 |
|---|
| 753 | |
|---|
| 754 | # prepare-all is deprecated, use prepare as valid replacement |
|---|
| 755 | PHONY += prepare-all |
|---|
| 756 | |
|---|
| 757 | # prepare3 is used to check if we are building in a separate output directory, |
|---|
| 758 | # and if so do: |
|---|
| 759 | # 1) Check that make has not been executed in the kernel src $(srctree) |
|---|
| 760 | # 2) Create the include2 directory, used for the second asm symlink |
|---|
| 761 | prepare3: .kernelrelease |
|---|
| 762 | ifneq ($(KBUILD_SRC),) |
|---|
| 763 | @echo ' Using $(srctree) as source for busybox' |
|---|
| 764 | $(Q)if [ -f $(srctree)/.config ]; then \ |
|---|
| 765 | echo " $(srctree) is not clean, please run 'make mrproper'";\ |
|---|
| 766 | echo " in the '$(srctree)' directory.";\ |
|---|
| 767 | /bin/false; \ |
|---|
| 768 | fi; |
|---|
| 769 | $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; |
|---|
| 770 | $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm |
|---|
| 771 | endif |
|---|
| 772 | |
|---|
| 773 | # prepare2 creates a makefile if using a separate output directory |
|---|
| 774 | prepare2: prepare3 outputmakefile |
|---|
| 775 | |
|---|
| 776 | prepare1: prepare2 include/config/MARKER |
|---|
| 777 | ifneq ($(KBUILD_MODULES),) |
|---|
| 778 | $(Q)mkdir -p $(MODVERDIR) |
|---|
| 779 | $(Q)rm -f $(MODVERDIR)/* |
|---|
| 780 | endif |
|---|
| 781 | |
|---|
| 782 | archprepare: prepare1 scripts_basic |
|---|
| 783 | |
|---|
| 784 | prepare0: archprepare FORCE |
|---|
| 785 | $(Q)$(MAKE) $(build)=. |
|---|
| 786 | |
|---|
| 787 | # All the preparing.. |
|---|
| 788 | prepare prepare-all: prepare0 |
|---|
| 789 | |
|---|
| 790 | # Leave this as default for preprocessing busybox.lds.S, which is now |
|---|
| 791 | # done in arch/$(ARCH)/kernel/Makefile |
|---|
| 792 | |
|---|
| 793 | export CPPFLAGS_busybox.lds += -P -C -U$(ARCH) |
|---|
| 794 | |
|---|
| 795 | # FIXME: The asm symlink changes when $(ARCH) changes. That's |
|---|
| 796 | # hard to detect, but I suppose "make mrproper" is a good idea |
|---|
| 797 | # before switching between archs anyway. |
|---|
| 798 | |
|---|
| 799 | #bbox# include/asm: |
|---|
| 800 | #bbox# @echo ' SYMLINK $@ -> include/asm-$(ARCH)' |
|---|
| 801 | #bbox# $(Q)if [ ! -d include ]; then mkdir -p include; fi; |
|---|
| 802 | #bbox# @ln -fsn asm-$(ARCH) $@ |
|---|
| 803 | |
|---|
| 804 | # Split autoconf.h into include/linux/config/* |
|---|
| 805 | quiet_cmd_gen_bbconfigopts = GEN include/bbconfigopts.h |
|---|
| 806 | cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs > include/bbconfigopts.h |
|---|
| 807 | quiet_cmd_split_autoconf = SPLIT include/autoconf.h -> include/config/* |
|---|
| 808 | cmd_split_autoconf = scripts/basic/split-include include/autoconf.h include/config |
|---|
| 809 | #bbox# piggybacked generation of few .h files |
|---|
| 810 | include/config/MARKER: scripts/basic/split-include include/autoconf.h |
|---|
| 811 | $(call cmd,split_autoconf) |
|---|
| 812 | $(call cmd,gen_bbconfigopts) |
|---|
| 813 | @touch $@ |
|---|
| 814 | |
|---|
| 815 | # Generate some files |
|---|
| 816 | # --------------------------------------------------------------------------- |
|---|
| 817 | |
|---|
| 818 | # KERNELRELEASE can change from a few different places, meaning version.h |
|---|
| 819 | # needs to be updated, so this check is forced on all builds |
|---|
| 820 | |
|---|
| 821 | uts_len := 64 |
|---|
| 822 | |
|---|
| 823 | define filechk_version.h |
|---|
| 824 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ |
|---|
| 825 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ |
|---|
| 826 | exit 1; \ |
|---|
| 827 | fi; \ |
|---|
| 828 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ |
|---|
| 829 | echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ |
|---|
| 830 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ |
|---|
| 831 | ) |
|---|
| 832 | endef |
|---|
| 833 | |
|---|
| 834 | # --------------------------------------------------------------------------- |
|---|
| 835 | |
|---|
| 836 | PHONY += depend dep |
|---|
| 837 | depend dep: |
|---|
| 838 | @echo '*** Warning: make $@ is unnecessary now.' |
|---|
| 839 | |
|---|
| 840 | # --------------------------------------------------------------------------- |
|---|
| 841 | # Modules |
|---|
| 842 | |
|---|
| 843 | ifdef CONFIG_MODULES |
|---|
| 844 | |
|---|
| 845 | # By default, build modules as well |
|---|
| 846 | |
|---|
| 847 | all: modules |
|---|
| 848 | |
|---|
| 849 | # Build modules |
|---|
| 850 | |
|---|
| 851 | PHONY += modules |
|---|
| 852 | modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox) |
|---|
| 853 | @echo ' Building modules, stage 2.'; |
|---|
| 854 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost |
|---|
| 855 | |
|---|
| 856 | |
|---|
| 857 | # Target to prepare building external modules |
|---|
| 858 | PHONY += modules_prepare |
|---|
| 859 | modules_prepare: prepare scripts |
|---|
| 860 | |
|---|
| 861 | # Target to install modules |
|---|
| 862 | PHONY += modules_install |
|---|
| 863 | modules_install: _modinst_ _modinst_post |
|---|
| 864 | |
|---|
| 865 | PHONY += _modinst_ |
|---|
| 866 | _modinst_: |
|---|
| 867 | @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ |
|---|
| 868 | echo "Warning: you may need to install module-init-tools"; \ |
|---|
| 869 | echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ |
|---|
| 870 | sleep 1; \ |
|---|
| 871 | fi |
|---|
| 872 | @rm -rf $(MODLIB)/kernel |
|---|
| 873 | @rm -f $(MODLIB)/source |
|---|
| 874 | @mkdir -p $(MODLIB)/kernel |
|---|
| 875 | @ln -s $(srctree) $(MODLIB)/source |
|---|
| 876 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
|---|
| 877 | rm -f $(MODLIB)/build ; \ |
|---|
| 878 | ln -s $(objtree) $(MODLIB)/build ; \ |
|---|
| 879 | fi |
|---|
| 880 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst |
|---|
| 881 | |
|---|
| 882 | # If System.map exists, run depmod. This deliberately does not have a |
|---|
| 883 | # dependency on System.map since that would run the dependency tree on |
|---|
| 884 | # busybox. This depmod is only for convenience to give the initial |
|---|
| 885 | # boot a modules.dep even before / is mounted read-write. However the |
|---|
| 886 | # boot script depmod is the master version. |
|---|
| 887 | ifeq "$(strip $(INSTALL_MOD_PATH))" "" |
|---|
| 888 | depmod_opts := |
|---|
| 889 | else |
|---|
| 890 | depmod_opts := -b $(INSTALL_MOD_PATH) -r |
|---|
| 891 | endif |
|---|
| 892 | PHONY += _modinst_post |
|---|
| 893 | _modinst_post: _modinst_ |
|---|
| 894 | if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi |
|---|
| 895 | |
|---|
| 896 | else # CONFIG_MODULES |
|---|
| 897 | |
|---|
| 898 | # Modules not configured |
|---|
| 899 | # --------------------------------------------------------------------------- |
|---|
| 900 | |
|---|
| 901 | modules modules_install: FORCE |
|---|
| 902 | @echo |
|---|
| 903 | @echo "The present busybox configuration has modules disabled." |
|---|
| 904 | @echo "Type 'make config' and enable loadable module support." |
|---|
| 905 | @echo "Then build a kernel with module support enabled." |
|---|
| 906 | @echo |
|---|
| 907 | @exit 1 |
|---|
| 908 | |
|---|
| 909 | endif # CONFIG_MODULES |
|---|
| 910 | |
|---|
| 911 | ### |
|---|
| 912 | # Cleaning is done on three levels. |
|---|
| 913 | # make clean Delete most generated files |
|---|
| 914 | # Leave enough to build external modules |
|---|
| 915 | # make mrproper Delete the current configuration, and all generated files |
|---|
| 916 | # make distclean Remove editor backup files, patch leftover files and the like |
|---|
| 917 | |
|---|
| 918 | # Directories & files removed with 'make clean' |
|---|
| 919 | CLEAN_DIRS += $(MODVERDIR) |
|---|
| 920 | CLEAN_FILES += busybox* System.map .kernelrelease \ |
|---|
| 921 | .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map |
|---|
| 922 | |
|---|
| 923 | # Directories & files removed with 'make mrproper' |
|---|
| 924 | MRPROPER_DIRS += include/config include2 |
|---|
| 925 | MRPROPER_FILES += .config .config.old include/asm .version .old_version \ |
|---|
| 926 | include/autoconf.h \ |
|---|
| 927 | include/bbconfigopts.h \ |
|---|
| 928 | include/usage_compressed.h \ |
|---|
| 929 | .kernelrelease Module.symvers tags TAGS cscope* |
|---|
| 930 | |
|---|
| 931 | # clean - Delete most, but leave enough to build external modules |
|---|
| 932 | # |
|---|
| 933 | clean: rm-dirs := $(CLEAN_DIRS) |
|---|
| 934 | clean: rm-files := $(CLEAN_FILES) |
|---|
| 935 | clean-dirs := $(addprefix _clean_,$(srctree) $(busybox-alldirs)) |
|---|
| 936 | |
|---|
| 937 | PHONY += $(clean-dirs) clean archclean |
|---|
| 938 | $(clean-dirs): |
|---|
| 939 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
|---|
| 940 | |
|---|
| 941 | clean: archclean $(clean-dirs) |
|---|
| 942 | $(call cmd,rmdirs) |
|---|
| 943 | $(call cmd,rmfiles) |
|---|
| 944 | @find . $(RCS_FIND_IGNORE) \ |
|---|
| 945 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
|---|
| 946 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ |
|---|
| 947 | -type f -print | xargs rm -f |
|---|
| 948 | |
|---|
| 949 | # mrproper - Delete all generated files, including .config |
|---|
| 950 | # |
|---|
| 951 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) |
|---|
| 952 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
|---|
| 953 | mrproper-dirs := $(addprefix _mrproper_,scripts) |
|---|
| 954 | |
|---|
| 955 | PHONY += $(mrproper-dirs) mrproper archmrproper |
|---|
| 956 | $(mrproper-dirs): |
|---|
| 957 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) |
|---|
| 958 | |
|---|
| 959 | mrproper: clean archmrproper $(mrproper-dirs) |
|---|
| 960 | $(call cmd,rmdirs) |
|---|
| 961 | $(call cmd,rmfiles) |
|---|
| 962 | |
|---|
| 963 | # distclean |
|---|
| 964 | # |
|---|
| 965 | PHONY += distclean |
|---|
| 966 | |
|---|
| 967 | distclean: mrproper |
|---|
| 968 | @find $(srctree) $(RCS_FIND_IGNORE) \ |
|---|
| 969 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
|---|
| 970 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ |
|---|
| 971 | -o -name '.*.rej' -o -size 0 \ |
|---|
| 972 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ |
|---|
| 973 | -type f -print | xargs rm -f |
|---|
| 974 | |
|---|
| 975 | |
|---|
| 976 | # Packaging of the kernel to various formats |
|---|
| 977 | # --------------------------------------------------------------------------- |
|---|
| 978 | # rpm target kept for backward compatibility |
|---|
| 979 | package-dir := $(srctree)/scripts/package |
|---|
| 980 | |
|---|
| 981 | %pkg: FORCE |
|---|
| 982 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
|---|
| 983 | rpm: FORCE |
|---|
| 984 | $(Q)$(MAKE) $(build)=$(package-dir) $@ |
|---|
| 985 | |
|---|
| 986 | |
|---|
| 987 | # Brief documentation of the typical targets used |
|---|
| 988 | # --------------------------------------------------------------------------- |
|---|
| 989 | |
|---|
| 990 | boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) |
|---|
| 991 | boards := $(notdir $(boards)) |
|---|
| 992 | |
|---|
| 993 | -include $(srctree)/Makefile.help |
|---|
| 994 | |
|---|
| 995 | # Documentation targets |
|---|
| 996 | # --------------------------------------------------------------------------- |
|---|
| 997 | %docs: scripts_basic FORCE |
|---|
| 998 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ |
|---|
| 999 | |
|---|
| 1000 | else # KBUILD_EXTMOD |
|---|
| 1001 | |
|---|
| 1002 | ### |
|---|
| 1003 | # External module support. |
|---|
| 1004 | # When building external modules the kernel used as basis is considered |
|---|
| 1005 | # read-only, and no consistency checks are made and the make |
|---|
| 1006 | # system is not used on the basis kernel. If updates are required |
|---|
| 1007 | # in the basis kernel ordinary make commands (without M=...) must |
|---|
| 1008 | # be used. |
|---|
| 1009 | # |
|---|
| 1010 | # The following are the only valid targets when building external |
|---|
| 1011 | # modules. |
|---|
| 1012 | # make M=dir clean Delete all automatically generated files |
|---|
| 1013 | # make M=dir modules Make all modules in specified dir |
|---|
| 1014 | # make M=dir Same as 'make M=dir modules' |
|---|
| 1015 | # make M=dir modules_install |
|---|
| 1016 | # Install the modules build in the module directory |
|---|
| 1017 | # Assumes install directory is already created |
|---|
| 1018 | |
|---|
| 1019 | # We are always building modules |
|---|
| 1020 | KBUILD_MODULES := 1 |
|---|
| 1021 | PHONY += crmodverdir |
|---|
| 1022 | crmodverdir: |
|---|
| 1023 | $(Q)mkdir -p $(MODVERDIR) |
|---|
| 1024 | $(Q)rm -f $(MODVERDIR)/* |
|---|
| 1025 | |
|---|
| 1026 | PHONY += $(objtree)/Module.symvers |
|---|
| 1027 | $(objtree)/Module.symvers: |
|---|
| 1028 | @test -e $(objtree)/Module.symvers || ( \ |
|---|
| 1029 | echo; \ |
|---|
| 1030 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ |
|---|
| 1031 | echo " is missing; modules will have no dependencies and modversions."; \ |
|---|
| 1032 | echo ) |
|---|
| 1033 | |
|---|
| 1034 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) |
|---|
| 1035 | PHONY += $(module-dirs) modules |
|---|
| 1036 | $(module-dirs): crmodverdir $(objtree)/Module.symvers |
|---|
| 1037 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) |
|---|
| 1038 | |
|---|
| 1039 | modules: $(module-dirs) |
|---|
| 1040 | @echo ' Building modules, stage 2.'; |
|---|
| 1041 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost |
|---|
| 1042 | |
|---|
| 1043 | PHONY += modules_install |
|---|
| 1044 | modules_install: _emodinst_ _emodinst_post |
|---|
| 1045 | |
|---|
| 1046 | install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
|---|
| 1047 | PHONY += _emodinst_ |
|---|
| 1048 | _emodinst_: |
|---|
| 1049 | $(Q)mkdir -p $(MODLIB)/$(install-dir) |
|---|
| 1050 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst |
|---|
| 1051 | |
|---|
| 1052 | # Run depmod only is we have System.map and depmod is executable |
|---|
| 1053 | quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
|---|
| 1054 | cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ |
|---|
| 1055 | $(DEPMOD) -ae -F System.map \ |
|---|
| 1056 | $(if $(strip $(INSTALL_MOD_PATH)), \ |
|---|
| 1057 | -b $(INSTALL_MOD_PATH) -r) \ |
|---|
| 1058 | $(KERNELRELEASE); \ |
|---|
| 1059 | fi |
|---|
| 1060 | |
|---|
| 1061 | PHONY += _emodinst_post |
|---|
| 1062 | _emodinst_post: _emodinst_ |
|---|
| 1063 | $(call cmd,depmod) |
|---|
| 1064 | |
|---|
| 1065 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) |
|---|
| 1066 | |
|---|
| 1067 | PHONY += $(clean-dirs) clean |
|---|
| 1068 | $(clean-dirs): |
|---|
| 1069 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
|---|
| 1070 | |
|---|
| 1071 | clean: rm-dirs := $(MODVERDIR) |
|---|
| 1072 | clean: $(clean-dirs) |
|---|
| 1073 | $(call cmd,rmdirs) |
|---|
| 1074 | @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ |
|---|
| 1075 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ |
|---|
| 1076 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ |
|---|
| 1077 | -type f -print | xargs rm -f |
|---|
| 1078 | |
|---|
| 1079 | help: |
|---|
| 1080 | @echo ' Building external modules.' |
|---|
| 1081 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' |
|---|
| 1082 | @echo '' |
|---|
| 1083 | @echo ' modules - default target, build the module(s)' |
|---|
| 1084 | @echo ' modules_install - install the module' |
|---|
| 1085 | @echo ' clean - remove generated files in module directory only' |
|---|
| 1086 | @echo '' |
|---|
| 1087 | |
|---|
| 1088 | # Dummies... |
|---|
| 1089 | PHONY += prepare scripts |
|---|
| 1090 | prepare: ; |
|---|
| 1091 | scripts: ; |
|---|
| 1092 | endif # KBUILD_EXTMOD |
|---|
| 1093 | |
|---|
| 1094 | # Generate tags for editors |
|---|
| 1095 | # --------------------------------------------------------------------------- |
|---|
| 1096 | |
|---|
| 1097 | #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set |
|---|
| 1098 | #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. |
|---|
| 1099 | #Adding $(srctree) adds about 20M on i386 to the size of the output file! |
|---|
| 1100 | |
|---|
| 1101 | ifeq ($(src),$(obj)) |
|---|
| 1102 | __srctree = |
|---|
| 1103 | else |
|---|
| 1104 | __srctree = $(srctree)/ |
|---|
| 1105 | endif |
|---|
| 1106 | |
|---|
| 1107 | ifeq ($(ALLSOURCE_ARCHS),) |
|---|
| 1108 | ifeq ($(ARCH),um) |
|---|
| 1109 | ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) |
|---|
| 1110 | else |
|---|
| 1111 | ALLINCLUDE_ARCHS := $(ARCH) |
|---|
| 1112 | endif |
|---|
| 1113 | else |
|---|
| 1114 | #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. |
|---|
| 1115 | ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) |
|---|
| 1116 | endif |
|---|
| 1117 | |
|---|
| 1118 | ALLSOURCE_ARCHS := $(ARCH) |
|---|
| 1119 | |
|---|
| 1120 | define all-sources |
|---|
| 1121 | ( find $(__srctree) $(RCS_FIND_IGNORE) \ |
|---|
| 1122 | \( -name include -o -name arch \) -prune -o \ |
|---|
| 1123 | -name '*.[chS]' -print; \ |
|---|
| 1124 | for ARCH in $(ALLSOURCE_ARCHS) ; do \ |
|---|
| 1125 | find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ |
|---|
| 1126 | -name '*.[chS]' -print; \ |
|---|
| 1127 | done ; \ |
|---|
| 1128 | find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ |
|---|
| 1129 | -name '*.[chS]' -print; \ |
|---|
| 1130 | find $(__srctree)include $(RCS_FIND_IGNORE) \ |
|---|
| 1131 | \( -name config -o -name 'asm-*' \) -prune \ |
|---|
| 1132 | -o -name '*.[chS]' -print; \ |
|---|
| 1133 | for ARCH in $(ALLINCLUDE_ARCHS) ; do \ |
|---|
| 1134 | find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ |
|---|
| 1135 | -name '*.[chS]' -print; \ |
|---|
| 1136 | done ; \ |
|---|
| 1137 | find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ |
|---|
| 1138 | -name '*.[chS]' -print ) |
|---|
| 1139 | endef |
|---|
| 1140 | |
|---|
| 1141 | quiet_cmd_cscope-file = FILELST cscope.files |
|---|
| 1142 | cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files |
|---|
| 1143 | |
|---|
| 1144 | quiet_cmd_cscope = MAKE cscope.out |
|---|
| 1145 | cmd_cscope = cscope -b |
|---|
| 1146 | |
|---|
| 1147 | cscope: FORCE |
|---|
| 1148 | $(call cmd,cscope-file) |
|---|
| 1149 | $(call cmd,cscope) |
|---|
| 1150 | |
|---|
| 1151 | quiet_cmd_TAGS = MAKE $@ |
|---|
| 1152 | define cmd_TAGS |
|---|
| 1153 | rm -f $@; \ |
|---|
| 1154 | ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ |
|---|
| 1155 | echo "-I __initdata,__exitdata,__acquires,__releases \ |
|---|
| 1156 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ |
|---|
| 1157 | --extra=+f --c-kinds=+px"`; \ |
|---|
| 1158 | $(all-sources) | xargs etags $$ETAGSF -a |
|---|
| 1159 | endef |
|---|
| 1160 | |
|---|
| 1161 | TAGS: FORCE |
|---|
| 1162 | $(call cmd,TAGS) |
|---|
| 1163 | |
|---|
| 1164 | |
|---|
| 1165 | quiet_cmd_tags = MAKE $@ |
|---|
| 1166 | define cmd_tags |
|---|
| 1167 | rm -f $@; \ |
|---|
| 1168 | CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ |
|---|
| 1169 | echo "-I __initdata,__exitdata,__acquires,__releases \ |
|---|
| 1170 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ |
|---|
| 1171 | --extra=+f --c-kinds=+px"`; \ |
|---|
| 1172 | $(all-sources) | xargs ctags $$CTAGSF -a |
|---|
| 1173 | endef |
|---|
| 1174 | |
|---|
| 1175 | tags: FORCE |
|---|
| 1176 | $(call cmd,tags) |
|---|
| 1177 | |
|---|
| 1178 | |
|---|
| 1179 | # Scripts to check various things for consistency |
|---|
| 1180 | # --------------------------------------------------------------------------- |
|---|
| 1181 | |
|---|
| 1182 | includecheck: |
|---|
| 1183 | find * $(RCS_FIND_IGNORE) \ |
|---|
| 1184 | -name '*.[hcS]' -type f -print | sort \ |
|---|
| 1185 | | xargs $(PERL) -w scripts/checkincludes.pl |
|---|
| 1186 | |
|---|
| 1187 | versioncheck: |
|---|
| 1188 | find * $(RCS_FIND_IGNORE) \ |
|---|
| 1189 | -name '*.[hcS]' -type f -print | sort \ |
|---|
| 1190 | | xargs $(PERL) -w scripts/checkversion.pl |
|---|
| 1191 | |
|---|
| 1192 | namespacecheck: |
|---|
| 1193 | $(PERL) $(srctree)/scripts/namespace.pl |
|---|
| 1194 | |
|---|
| 1195 | endif #ifeq ($(config-targets),1) |
|---|
| 1196 | endif #ifeq ($(mixed-targets),1) |
|---|
| 1197 | |
|---|
| 1198 | PHONY += checkstack |
|---|
| 1199 | checkstack: |
|---|
| 1200 | $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \ |
|---|
| 1201 | $(PERL) $(src)/scripts/checkstack.pl $(ARCH) |
|---|
| 1202 | |
|---|
| 1203 | kernelrelease: |
|---|
| 1204 | $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \ |
|---|
| 1205 | $(error kernelrelease not valid - run 'make *config' to update it)) |
|---|
| 1206 | kernelversion: |
|---|
| 1207 | @echo $(KERNELVERSION) |
|---|
| 1208 | |
|---|
| 1209 | # Single targets |
|---|
| 1210 | # --------------------------------------------------------------------------- |
|---|
| 1211 | # Single targets are compatible with: |
|---|
| 1212 | # - build whith mixed source and output |
|---|
| 1213 | # - build with separate output dir 'make O=...' |
|---|
| 1214 | # - external modules |
|---|
| 1215 | # |
|---|
| 1216 | # target-dir => where to store outputfile |
|---|
| 1217 | # build-dir => directory in kernel source tree to use |
|---|
| 1218 | |
|---|
| 1219 | ifeq ($(KBUILD_EXTMOD),) |
|---|
| 1220 | build-dir = $(patsubst %/,%,$(dir $@)) |
|---|
| 1221 | target-dir = $(dir $@) |
|---|
| 1222 | else |
|---|
| 1223 | zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) |
|---|
| 1224 | build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) |
|---|
| 1225 | target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) |
|---|
| 1226 | endif |
|---|
| 1227 | |
|---|
| 1228 | %.s: %.c prepare scripts FORCE |
|---|
| 1229 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
|---|
| 1230 | %.i: %.c prepare scripts FORCE |
|---|
| 1231 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
|---|
| 1232 | %.o: %.c prepare scripts FORCE |
|---|
| 1233 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
|---|
| 1234 | %.lst: %.c prepare scripts FORCE |
|---|
| 1235 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
|---|
| 1236 | %.s: %.S prepare scripts FORCE |
|---|
| 1237 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
|---|
| 1238 | %.o: %.S prepare scripts FORCE |
|---|
| 1239 | $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
|---|
| 1240 | |
|---|
| 1241 | # Modules |
|---|
| 1242 | / %/: prepare scripts FORCE |
|---|
| 1243 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
|---|
| 1244 | $(build)=$(build-dir) |
|---|
| 1245 | %.ko: prepare scripts FORCE |
|---|
| 1246 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
|---|
| 1247 | $(build)=$(build-dir) $(@:.ko=.o) |
|---|
| 1248 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost |
|---|
| 1249 | |
|---|
| 1250 | # FIXME Should go into a make.lib or something |
|---|
| 1251 | # =========================================================================== |
|---|
| 1252 | |
|---|
| 1253 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) |
|---|
| 1254 | cmd_rmdirs = rm -rf $(rm-dirs) |
|---|
| 1255 | |
|---|
| 1256 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) |
|---|
| 1257 | cmd_rmfiles = rm -f $(rm-files) |
|---|
| 1258 | |
|---|
| 1259 | |
|---|
| 1260 | a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ |
|---|
| 1261 | $(NOSTDINC_FLAGS) $(CPPFLAGS) \ |
|---|
| 1262 | $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) |
|---|
| 1263 | |
|---|
| 1264 | quiet_cmd_as_o_S = AS $@ |
|---|
| 1265 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
|---|
| 1266 | |
|---|
| 1267 | # read all saved command lines |
|---|
| 1268 | |
|---|
| 1269 | targets := $(wildcard $(sort $(targets))) |
|---|
| 1270 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
|---|
| 1271 | |
|---|
| 1272 | ifneq ($(cmd_files),) |
|---|
| 1273 | $(cmd_files): ; # Do not try to update included dependency files |
|---|
| 1274 | include $(cmd_files) |
|---|
| 1275 | endif |
|---|
| 1276 | |
|---|
| 1277 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir |
|---|
| 1278 | # Usage: |
|---|
| 1279 | # $(Q)$(MAKE) $(clean)=dir |
|---|
| 1280 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj |
|---|
| 1281 | |
|---|
| 1282 | endif # skip-makefile |
|---|
| 1283 | |
|---|
| 1284 | PHONY += FORCE |
|---|
| 1285 | FORCE: |
|---|
| 1286 | |
|---|
| 1287 | -include $(srctree)/Makefile.custom |
|---|
| 1288 | |
|---|
| 1289 | # Declare the contents of the .PHONY variable as phony. We keep that |
|---|
| 1290 | # information in a variable se we can use it in if_changed and friends. |
|---|
| 1291 | .PHONY: $(PHONY) |
|---|
