Sam Ravnborg | f77bf01 | 2007-10-15 22:25:06 +0200 | [diff] [blame] | 1 | # Backward compatibility |
| 2 | asflags-y += $(EXTRA_AFLAGS) |
| 3 | ccflags-y += $(EXTRA_CFLAGS) |
| 4 | cppflags-y += $(EXTRA_CPPFLAGS) |
| 5 | ldflags-y += $(EXTRA_LDFLAGS) |
| 6 | |
Sam Ravnborg | 720097d | 2009-04-19 11:04:26 +0200 | [diff] [blame] | 7 | # |
| 8 | # flags that take effect in sub directories |
| 9 | export KBUILD_SUBDIR_ASFLAGS := $(KBUILD_SUBDIR_ASFLAGS) $(subdir-asflags-y) |
| 10 | export KBUILD_SUBDIR_CCFLAGS := $(KBUILD_SUBDIR_CCFLAGS) $(subdir-ccflags-y) |
| 11 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | # Figure out what we need to build from the various variables |
| 13 | # =========================================================================== |
| 14 | |
| 15 | # When an object is listed to be built compiled-in and modular, |
| 16 | # only build the compiled-in version |
| 17 | |
| 18 | obj-m := $(filter-out $(obj-y),$(obj-m)) |
| 19 | |
| 20 | # Libraries are always collected in one lib file. |
| 21 | # Filter out objects already built-in |
| 22 | |
| 23 | lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m))) |
| 24 | |
| 25 | |
| 26 | # Handle objects in subdirs |
| 27 | # --------------------------------------------------------------------------- |
| 28 | # o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o |
| 29 | # and add the directory to the list of dirs to descend into: $(subdir-y) |
| 30 | # o if we encounter foo/ in $(obj-m), remove it from $(obj-m) |
| 31 | # and add the directory to the list of dirs to descend into: $(subdir-m) |
| 32 | |
Tejun Heo | 551559e | 2007-12-07 21:04:30 +0900 | [diff] [blame] | 33 | # Determine modorder. |
| 34 | # Unfortunately, we don't have information about ordering between -y |
| 35 | # and -m subdirs. Just put -y's first. |
| 36 | modorder := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko)) |
| 37 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | __subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y))) |
| 39 | subdir-y += $(__subdir-y) |
| 40 | __subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m))) |
| 41 | subdir-m += $(__subdir-m) |
| 42 | obj-y := $(patsubst %/, %/built-in.o, $(obj-y)) |
| 43 | obj-m := $(filter-out %/, $(obj-m)) |
| 44 | |
| 45 | # Subdirectories we need to descend into |
| 46 | |
| 47 | subdir-ym := $(sort $(subdir-y) $(subdir-m)) |
| 48 | |
| 49 | # if $(foo-objs) exists, foo.o is a composite object |
| 50 | multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m)))) |
| 51 | multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m)))) |
| 52 | multi-used := $(multi-used-y) $(multi-used-m) |
| 53 | single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m))) |
| 54 | |
| 55 | # Build list of the parts of our composite objects, our composite |
| 56 | # objects depend on those (obviously) |
| 57 | multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y))) |
| 58 | multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y))) |
| 59 | multi-objs := $(multi-objs-y) $(multi-objs-m) |
| 60 | |
Sam Ravnborg | f5fb976 | 2007-09-15 08:55:39 +0200 | [diff] [blame] | 61 | # $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to |
| 62 | # tell kbuild to descend |
| 63 | subdir-obj-y := $(filter %/built-in.o, $(obj-y)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
| 65 | # $(obj-dirs) is a list of directories that contain object files |
| 66 | obj-dirs := $(dir $(multi-objs) $(subdir-obj-y)) |
| 67 | |
| 68 | # Replace multi-part objects by their individual parts, look at local dir only |
| 69 | real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) $(extra-y) |
| 70 | real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) |
| 71 | |
| 72 | # Add subdir path |
| 73 | |
| 74 | extra-y := $(addprefix $(obj)/,$(extra-y)) |
| 75 | always := $(addprefix $(obj)/,$(always)) |
| 76 | targets := $(addprefix $(obj)/,$(targets)) |
Tejun Heo | 551559e | 2007-12-07 21:04:30 +0900 | [diff] [blame] | 77 | modorder := $(addprefix $(obj)/,$(modorder)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | obj-y := $(addprefix $(obj)/,$(obj-y)) |
| 79 | obj-m := $(addprefix $(obj)/,$(obj-m)) |
| 80 | lib-y := $(addprefix $(obj)/,$(lib-y)) |
| 81 | subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y)) |
| 82 | real-objs-y := $(addprefix $(obj)/,$(real-objs-y)) |
| 83 | real-objs-m := $(addprefix $(obj)/,$(real-objs-m)) |
| 84 | single-used-m := $(addprefix $(obj)/,$(single-used-m)) |
| 85 | multi-used-y := $(addprefix $(obj)/,$(multi-used-y)) |
| 86 | multi-used-m := $(addprefix $(obj)/,$(multi-used-m)) |
| 87 | multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y)) |
| 88 | multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m)) |
| 89 | subdir-ym := $(addprefix $(obj)/,$(subdir-ym)) |
| 90 | obj-dirs := $(addprefix $(obj)/,$(obj-dirs)) |
| 91 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | # These flags are needed for modversions and compiling, so we define them here |
| 93 | # already |
| 94 | # $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will |
| 95 | # end up in (or would, if it gets compiled in) |
| 96 | # Note: It's possible that one object gets potentially linked into more |
| 97 | # than one module. In that case KBUILD_MODNAME will be set to foo_bar, |
| 98 | # where foo and bar are the name of the modules. |
Ustyugov Roman | f83b5e3 | 2005-09-23 08:42:11 +0400 | [diff] [blame] | 99 | name-fix = $(subst $(comma),_,$(subst -,_,$1)) |
Sam Ravnborg | 5e8d780 | 2006-07-01 09:58:02 +0200 | [diff] [blame] | 100 | basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))" |
Ustyugov Roman | f83b5e3 | 2005-09-23 08:42:11 +0400 | [diff] [blame] | 101 | modname_flags = $(if $(filter 1,$(words $(modname))),\ |
| 102 | -D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
Jason Baron | 346e15b | 2008-08-12 16:46:19 -0400 | [diff] [blame] | 104 | #hash values |
Jason Baron | e9d376f | 2009-02-05 11:51:38 -0500 | [diff] [blame] | 105 | ifdef CONFIG_DYNAMIC_DEBUG |
Jason Baron | 346e15b | 2008-08-12 16:46:19 -0400 | [diff] [blame] | 106 | debug_flags = -D"DEBUG_HASH=$(shell ./scripts/basic/hash djb2 $(@D)$(modname))"\ |
| 107 | -D"DEBUG_HASH2=$(shell ./scripts/basic/hash r5 $(@D)$(modname))" |
| 108 | else |
| 109 | debug_flags = |
| 110 | endif |
| 111 | |
Sam Ravnborg | 720097d | 2009-04-19 11:04:26 +0200 | [diff] [blame] | 112 | orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \ |
Sam Ravnborg | d8672b4 | 2008-11-21 21:50:02 +0100 | [diff] [blame] | 113 | $(ccflags-y) $(CFLAGS_$(basetarget).o) |
Steven Rostedt | 656ee82 | 2008-05-14 21:30:29 -0400 | [diff] [blame] | 114 | _c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags)) |
Sam Ravnborg | 720097d | 2009-04-19 11:04:26 +0200 | [diff] [blame] | 115 | _a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \ |
Sam Ravnborg | d8672b4 | 2008-11-21 21:50:02 +0100 | [diff] [blame] | 116 | $(asflags-y) $(AFLAGS_$(basetarget).o) |
Sam Ravnborg | f77bf01 | 2007-10-15 22:25:06 +0200 | [diff] [blame] | 117 | _cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
| 119 | # If building the kernel in a separate objtree expand all occurrences |
| 120 | # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/'). |
| 121 | |
| 122 | ifeq ($(KBUILD_SRC),) |
| 123 | __c_flags = $(_c_flags) |
| 124 | __a_flags = $(_a_flags) |
| 125 | __cpp_flags = $(_cpp_flags) |
| 126 | else |
| 127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | # -I$(obj) locates generated .h files |
| 129 | # $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files |
| 130 | # and locates generated .h files |
| 131 | # FIXME: Replace both with specific CFLAGS* statements in the makefiles |
| 132 | __c_flags = $(call addtree,-I$(obj)) $(call flags,_c_flags) |
| 133 | __a_flags = $(call flags,_a_flags) |
| 134 | __cpp_flags = $(call flags,_cpp_flags) |
| 135 | endif |
| 136 | |
Sam Ravnborg | d8672b4 | 2008-11-21 21:50:02 +0100 | [diff] [blame] | 137 | c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
| 138 | $(__c_flags) $(modkern_cflags) \ |
Jason Baron | 346e15b | 2008-08-12 16:46:19 -0400 | [diff] [blame] | 139 | -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags) \ |
| 140 | $(debug_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | |
Sam Ravnborg | d8672b4 | 2008-11-21 21:50:02 +0100 | [diff] [blame] | 142 | a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | $(__a_flags) $(modkern_aflags) |
| 144 | |
Sam Ravnborg | d8672b4 | 2008-11-21 21:50:02 +0100 | [diff] [blame] | 145 | cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ |
| 146 | $(__cpp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
Sam Ravnborg | f77bf01 | 2007-10-15 22:25:06 +0200 | [diff] [blame] | 148 | ld_flags = $(LDFLAGS) $(ldflags-y) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | |
| 150 | # Finds the multi-part object the current object will be linked into |
| 151 | modname-multi = $(sort $(foreach m,$(multi-used),\ |
| 152 | $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=)))) |
| 153 | |
| 154 | # Shipped files |
| 155 | # =========================================================================== |
| 156 | |
| 157 | quiet_cmd_shipped = SHIPPED $@ |
| 158 | cmd_shipped = cat $< > $@ |
| 159 | |
| 160 | $(obj)/%:: $(src)/%_shipped |
| 161 | $(call cmd,shipped) |
| 162 | |
| 163 | # Commands useful for building a boot image |
| 164 | # =========================================================================== |
| 165 | # |
| 166 | # Use as following: |
| 167 | # |
| 168 | # target: source(s) FORCE |
| 169 | # $(if_changed,ld/objcopy/gzip) |
| 170 | # |
Sam Ravnborg | 836caba | 2007-09-30 20:34:36 +0200 | [diff] [blame] | 171 | # and add target to extra-y so that we know we have to |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | # read in the saved command line |
| 173 | |
| 174 | # Linking |
| 175 | # --------------------------------------------------------------------------- |
| 176 | |
| 177 | quiet_cmd_ld = LD $@ |
Sam Ravnborg | f77bf01 | 2007-10-15 22:25:06 +0200 | [diff] [blame] | 178 | cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | $(filter-out FORCE,$^) -o $@ |
| 180 | |
| 181 | # Objcopy |
| 182 | # --------------------------------------------------------------------------- |
| 183 | |
| 184 | quiet_cmd_objcopy = OBJCOPY $@ |
| 185 | cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@ |
| 186 | |
| 187 | # Gzip |
| 188 | # --------------------------------------------------------------------------- |
| 189 | |
| 190 | quiet_cmd_gzip = GZIP $@ |
H. Peter Anvin | d3dd3b5 | 2009-05-05 21:17:15 -0700 | [diff] [blame] | 191 | cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -f -9 > $@) || \ |
| 192 | (rm -f $@ ; false) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Alain Knaff | bc22c17 | 2009-01-04 22:46:16 +0100 | [diff] [blame] | 195 | # Bzip2 |
| 196 | # --------------------------------------------------------------------------- |
| 197 | |
H. Peter Anvin | d3dd3b5 | 2009-05-05 21:17:15 -0700 | [diff] [blame] | 198 | # Bzip2 and LZMA do not include size in file... so we have to fake that; |
| 199 | # append the size as a 32-bit littleendian number as gzip does. |
| 200 | size_append = echo -ne $(shell \ |
| 201 | dec_size=0; \ |
| 202 | for F in $1; do \ |
| 203 | fsize=$$(stat -c "%s" $$F); \ |
| 204 | dec_size=$$(expr $$dec_size + $$fsize); \ |
| 205 | done; \ |
| 206 | printf "%08x" $$dec_size | \ |
| 207 | sed 's/\(..\)\(..\)\(..\)\(..\)/\\\\x\4\\\\x\3\\\\x\2\\\\x\1/g' \ |
| 208 | ) |
Alain Knaff | bc22c17 | 2009-01-04 22:46:16 +0100 | [diff] [blame] | 209 | |
H. Peter Anvin | d3dd3b5 | 2009-05-05 21:17:15 -0700 | [diff] [blame] | 210 | quiet_cmd_bzip2 = BZIP2 $@ |
| 211 | cmd_bzip2 = (cat $(filter-out FORCE,$^) | \ |
| 212 | bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ |
| 213 | (rm -f $@ ; false) |
Alain Knaff | bc22c17 | 2009-01-04 22:46:16 +0100 | [diff] [blame] | 214 | |
| 215 | # Lzma |
| 216 | # --------------------------------------------------------------------------- |
| 217 | |
| 218 | quiet_cmd_lzma = LZMA $@ |
H. Peter Anvin | d3dd3b5 | 2009-05-05 21:17:15 -0700 | [diff] [blame] | 219 | cmd_lzma = (cat $(filter-out FORCE,$^) | \ |
| 220 | lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ |
| 221 | (rm -f $@ ; false) |