diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /scripts/Makefile.lib |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'scripts/Makefile.lib')
-rw-r--r-- | scripts/Makefile.lib | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib new file mode 100644 index 00000000000..7cf75cc4f84 --- /dev/null +++ b/scripts/Makefile.lib | |||
@@ -0,0 +1,267 @@ | |||
1 | # =========================================================================== | ||
2 | # kbuild: Generic definitions | ||
3 | # =========================================================================== | ||
4 | |||
5 | # Standard vars | ||
6 | |||
7 | comma := , | ||
8 | empty := | ||
9 | space := $(empty) $(empty) | ||
10 | |||
11 | # Backward compatibility - to be removed... | ||
12 | extra-y += $(EXTRA_TARGETS) | ||
13 | # Figure out what we need to build from the various variables | ||
14 | # =========================================================================== | ||
15 | |||
16 | # When an object is listed to be built compiled-in and modular, | ||
17 | # only build the compiled-in version | ||
18 | |||
19 | obj-m := $(filter-out $(obj-y),$(obj-m)) | ||
20 | |||
21 | # Libraries are always collected in one lib file. | ||
22 | # Filter out objects already built-in | ||
23 | |||
24 | lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m))) | ||
25 | |||
26 | |||
27 | # Handle objects in subdirs | ||
28 | # --------------------------------------------------------------------------- | ||
29 | # o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o | ||
30 | # and add the directory to the list of dirs to descend into: $(subdir-y) | ||
31 | # o if we encounter foo/ in $(obj-m), remove it from $(obj-m) | ||
32 | # and add the directory to the list of dirs to descend into: $(subdir-m) | ||
33 | |||
34 | __subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y))) | ||
35 | subdir-y += $(__subdir-y) | ||
36 | __subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m))) | ||
37 | subdir-m += $(__subdir-m) | ||
38 | obj-y := $(patsubst %/, %/built-in.o, $(obj-y)) | ||
39 | obj-m := $(filter-out %/, $(obj-m)) | ||
40 | |||
41 | # Subdirectories we need to descend into | ||
42 | |||
43 | subdir-ym := $(sort $(subdir-y) $(subdir-m)) | ||
44 | |||
45 | # if $(foo-objs) exists, foo.o is a composite object | ||
46 | multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m)))) | ||
47 | multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m)))) | ||
48 | multi-used := $(multi-used-y) $(multi-used-m) | ||
49 | single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m))) | ||
50 | |||
51 | # Build list of the parts of our composite objects, our composite | ||
52 | # objects depend on those (obviously) | ||
53 | multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y))) | ||
54 | multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y))) | ||
55 | multi-objs := $(multi-objs-y) $(multi-objs-m) | ||
56 | |||
57 | # $(subdir-obj-y) is the list of objects in $(obj-y) which do not live | ||
58 | # in the local directory | ||
59 | subdir-obj-y := $(foreach o,$(obj-y),$(if $(filter-out $(o),$(notdir $(o))),$(o))) | ||
60 | |||
61 | # $(obj-dirs) is a list of directories that contain object files | ||
62 | obj-dirs := $(dir $(multi-objs) $(subdir-obj-y)) | ||
63 | |||
64 | # Replace multi-part objects by their individual parts, look at local dir only | ||
65 | 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) | ||
66 | real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) | ||
67 | |||
68 | # Add subdir path | ||
69 | |||
70 | extra-y := $(addprefix $(obj)/,$(extra-y)) | ||
71 | always := $(addprefix $(obj)/,$(always)) | ||
72 | targets := $(addprefix $(obj)/,$(targets)) | ||
73 | obj-y := $(addprefix $(obj)/,$(obj-y)) | ||
74 | obj-m := $(addprefix $(obj)/,$(obj-m)) | ||
75 | lib-y := $(addprefix $(obj)/,$(lib-y)) | ||
76 | subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y)) | ||
77 | real-objs-y := $(addprefix $(obj)/,$(real-objs-y)) | ||
78 | real-objs-m := $(addprefix $(obj)/,$(real-objs-m)) | ||
79 | single-used-m := $(addprefix $(obj)/,$(single-used-m)) | ||
80 | multi-used-y := $(addprefix $(obj)/,$(multi-used-y)) | ||
81 | multi-used-m := $(addprefix $(obj)/,$(multi-used-m)) | ||
82 | multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y)) | ||
83 | multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m)) | ||
84 | subdir-ym := $(addprefix $(obj)/,$(subdir-ym)) | ||
85 | obj-dirs := $(addprefix $(obj)/,$(obj-dirs)) | ||
86 | |||
87 | # The temporary file to save gcc -MD generated dependencies must not | ||
88 | # contain a comma | ||
89 | depfile = $(subst $(comma),_,$(@D)/.$(@F).d) | ||
90 | |||
91 | # These flags are needed for modversions and compiling, so we define them here | ||
92 | # already | ||
93 | # $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will | ||
94 | # end up in (or would, if it gets compiled in) | ||
95 | # Note: It's possible that one object gets potentially linked into more | ||
96 | # than one module. In that case KBUILD_MODNAME will be set to foo_bar, | ||
97 | # where foo and bar are the name of the modules. | ||
98 | basename_flags = -DKBUILD_BASENAME=$(subst $(comma),_,$(subst -,_,$(*F))) | ||
99 | modname_flags = $(if $(filter 1,$(words $(modname))),-DKBUILD_MODNAME=$(subst $(comma),_,$(subst -,_,$(modname)))) | ||
100 | |||
101 | _c_flags = $(CFLAGS) $(EXTRA_CFLAGS) $(CFLAGS_$(*F).o) | ||
102 | _a_flags = $(AFLAGS) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) | ||
103 | _cpp_flags = $(CPPFLAGS) $(EXTRA_CPPFLAGS) $(CPPFLAGS_$(@F)) | ||
104 | |||
105 | # If building the kernel in a separate objtree expand all occurrences | ||
106 | # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/'). | ||
107 | |||
108 | ifeq ($(KBUILD_SRC),) | ||
109 | __c_flags = $(_c_flags) | ||
110 | __a_flags = $(_a_flags) | ||
111 | __cpp_flags = $(_cpp_flags) | ||
112 | else | ||
113 | |||
114 | # Prefix -I with $(srctree) if it is not an absolute path | ||
115 | addtree = $(if $(filter-out -I/%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1))) $(1) | ||
116 | # Find all -I options and call addtree | ||
117 | flags = $(foreach o,$($(1)),$(if $(filter -I%,$(o)),$(call addtree,$(o)),$(o))) | ||
118 | |||
119 | # -I$(obj) locates generated .h files | ||
120 | # $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files | ||
121 | # and locates generated .h files | ||
122 | # FIXME: Replace both with specific CFLAGS* statements in the makefiles | ||
123 | __c_flags = $(call addtree,-I$(obj)) $(call flags,_c_flags) | ||
124 | __a_flags = $(call flags,_a_flags) | ||
125 | __cpp_flags = $(call flags,_cpp_flags) | ||
126 | endif | ||
127 | |||
128 | c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(CPPFLAGS) \ | ||
129 | $(__c_flags) $(modkern_cflags) \ | ||
130 | $(basename_flags) $(modname_flags) | ||
131 | |||
132 | a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(CPPFLAGS) \ | ||
133 | $(__a_flags) $(modkern_aflags) | ||
134 | |||
135 | cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(__cpp_flags) | ||
136 | |||
137 | ld_flags = $(LDFLAGS) $(EXTRA_LDFLAGS) | ||
138 | |||
139 | # Finds the multi-part object the current object will be linked into | ||
140 | modname-multi = $(sort $(foreach m,$(multi-used),\ | ||
141 | $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=)))) | ||
142 | |||
143 | # Shipped files | ||
144 | # =========================================================================== | ||
145 | |||
146 | quiet_cmd_shipped = SHIPPED $@ | ||
147 | cmd_shipped = cat $< > $@ | ||
148 | |||
149 | $(obj)/%:: $(src)/%_shipped | ||
150 | $(call cmd,shipped) | ||
151 | |||
152 | # Commands useful for building a boot image | ||
153 | # =========================================================================== | ||
154 | # | ||
155 | # Use as following: | ||
156 | # | ||
157 | # target: source(s) FORCE | ||
158 | # $(if_changed,ld/objcopy/gzip) | ||
159 | # | ||
160 | # and add target to EXTRA_TARGETS so that we know we have to | ||
161 | # read in the saved command line | ||
162 | |||
163 | # Linking | ||
164 | # --------------------------------------------------------------------------- | ||
165 | |||
166 | quiet_cmd_ld = LD $@ | ||
167 | cmd_ld = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) $(LDFLAGS_$(@F)) \ | ||
168 | $(filter-out FORCE,$^) -o $@ | ||
169 | |||
170 | # Objcopy | ||
171 | # --------------------------------------------------------------------------- | ||
172 | |||
173 | quiet_cmd_objcopy = OBJCOPY $@ | ||
174 | cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@ | ||
175 | |||
176 | # Gzip | ||
177 | # --------------------------------------------------------------------------- | ||
178 | |||
179 | quiet_cmd_gzip = GZIP $@ | ||
180 | cmd_gzip = gzip -f -9 < $< > $@ | ||
181 | |||
182 | # =========================================================================== | ||
183 | # Generic stuff | ||
184 | # =========================================================================== | ||
185 | |||
186 | ifneq ($(KBUILD_NOCMDDEP),1) | ||
187 | # Check if both arguments has same arguments. Result in empty string if equal | ||
188 | # User may override this check using make KBUILD_NOCMDDEP=1 | ||
189 | arg-check = $(strip $(filter-out $(1), $(2)) $(filter-out $(2), $(1)) ) | ||
190 | |||
191 | endif | ||
192 | |||
193 | # echo command. Short version is $(quiet) equals quiet, otherwise full command | ||
194 | echo-cmd = $(if $($(quiet)cmd_$(1)), \ | ||
195 | echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) | ||
196 | |||
197 | # function to only execute the passed command if necessary | ||
198 | # >'< substitution is for echo to work, >$< substitution to preserve $ when reloading .cmd file | ||
199 | # note: when using inline perl scripts [perl -e '...$$t=1;...'] in $(cmd_xxx) double $$ your perl vars | ||
200 | # | ||
201 | if_changed = $(if $(strip $? $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ), \ | ||
202 | @set -e; \ | ||
203 | $(echo-cmd) \ | ||
204 | $(cmd_$(1)); \ | ||
205 | echo 'cmd_$@ := $(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).cmd) | ||
206 | |||
207 | |||
208 | # execute the command and also postprocess generated .d dependencies | ||
209 | # file | ||
210 | |||
211 | if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\ | ||
212 | $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ), \ | ||
213 | @set -e; \ | ||
214 | $(echo-cmd) \ | ||
215 | $(cmd_$(1)); \ | ||
216 | scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \ | ||
217 | rm -f $(depfile); \ | ||
218 | mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd) | ||
219 | |||
220 | # Usage: $(call if_changed_rule,foo) | ||
221 | # will check if $(cmd_foo) changed, or any of the prequisites changed, | ||
222 | # and if so will execute $(rule_foo) | ||
223 | |||
224 | if_changed_rule = $(if $(strip $? $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ),\ | ||
225 | @set -e; \ | ||
226 | $(rule_$(1))) | ||
227 | |||
228 | # If quiet is set, only print short version of command | ||
229 | |||
230 | cmd = @$(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))' &&) $(cmd_$(1)) | ||
231 | |||
232 | # $(call descend,<dir>,<target>) | ||
233 | # Recursively call a sub-make in <dir> with target <target> | ||
234 | # Usage is deprecated, because make do not see this as an invocation of make. | ||
235 | descend =$(Q)$(MAKE) -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj=$(1) $(2) | ||
236 | |||
237 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj= | ||
238 | # Usage: | ||
239 | # $(Q)$(MAKE) $(build)=dir | ||
240 | build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj | ||
241 | |||
242 | # filechk is used to check if the content of a generated file is updated. | ||
243 | # Sample usage: | ||
244 | # define filechk_sample | ||
245 | # echo $KERNELRELEASE | ||
246 | # endef | ||
247 | # version.h : Makefile | ||
248 | # $(call filechk,sample) | ||
249 | # The rule defined shall write to stdout the content of the new file. | ||
250 | # The existing file will be compared with the new one. | ||
251 | # - If no file exist it is created | ||
252 | # - If the content differ the new file is used | ||
253 | # - If they are equal no change, and no timestamp update | ||
254 | |||
255 | define filechk | ||
256 | $(Q)set -e; \ | ||
257 | echo ' CHK $@'; \ | ||
258 | mkdir -p $(dir $@); \ | ||
259 | $(filechk_$(1)) $(2) > $@.tmp; \ | ||
260 | if [ -r $@ ] && cmp -s $@ $@.tmp; then \ | ||
261 | rm -f $@.tmp; \ | ||
262 | else \ | ||
263 | echo ' UPD $@'; \ | ||
264 | mv -f $@.tmp $@; \ | ||
265 | fi | ||
266 | endef | ||
267 | |||