Skip to content

Commit e9be6f9

Browse files
wujiamingwujiaming
committed
add Makefile.lib again
1 parent b5bdaff commit e9be6f9

File tree

1 file changed

+232
-0
lines changed

1 file changed

+232
-0
lines changed

‎kernel/scripts/Makefile.lib‎

Lines changed: 232 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,232 @@
1+
# Backward compatibility
2+
asflags-y += $(EXTRA_AFLAGS)
3+
ccflags-y += $(EXTRA_CFLAGS)
4+
cppflags-y += $(EXTRA_CPPFLAGS)
5+
ldflags-y += $(EXTRA_LDFLAGS)
6+
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+
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+
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+
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+
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))
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))
77+
modorder := $(addprefix $(obj)/,$(modorder))
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+
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.
99+
name-fix = $(subst $(comma),_,$(subst -,_,$1))
100+
basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))"
101+
modname_flags = $(if $(filter 1,$(words $(modname))),\
102+
-D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))")
103+
104+
#hash values
105+
ifdef CONFIG_DYNAMIC_DEBUG
106+
debug_flags = -D"DEBUG_HASH=$(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+
112+
orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \
113+
$(ccflags-y) $(CFLAGS_$(basetarget).o)
114+
_c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
115+
_a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \
116+
$(asflags-y) $(AFLAGS_$(basetarget).o)
117+
_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
118+
119+
#
120+
# Enable gcov profiling flags for a file, directory or for all files depending
121+
# on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL
122+
# (in this order)
123+
#
124+
ifeq ($(CONFIG_GCOV_KERNEL),y)
125+
_c_flags += $(if $(patsubst n%,, \
126+
$(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \
127+
$(CFLAGS_GCOV))
128+
endif
129+
130+
# If building the kernel in a separate objtree expand all occurrences
131+
# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
132+
133+
ifeq ($(KBUILD_SRC),)
134+
__c_flags = $(_c_flags)
135+
__a_flags = $(_a_flags)
136+
__cpp_flags = $(_cpp_flags)
137+
else
138+
139+
# -I$(obj) locates generated .h files
140+
# $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files
141+
# and locates generated .h files
142+
# FIXME: Replace both with specific CFLAGS* statements in the makefiles
143+
__c_flags = $(call addtree,-I$(obj)) $(call flags,_c_flags)
144+
__a_flags = $(call flags,_a_flags)
145+
__cpp_flags = $(call flags,_cpp_flags)
146+
endif
147+
148+
c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
149+
$(__c_flags) $(modkern_cflags) \
150+
-D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags) \
151+
$(debug_flags)
152+
153+
a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
154+
$(__a_flags) $(modkern_aflags)
155+
156+
cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
157+
$(__cpp_flags)
158+
159+
ld_flags = $(LDFLAGS) $(ldflags-y)
160+
161+
# Finds the multi-part object the current object will be linked into
162+
modname-multi = $(sort $(foreach m,$(multi-used),\
163+
$(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))
164+
165+
# Shipped files
166+
# ===========================================================================
167+
168+
quiet_cmd_shipped = SHIPPED $@
169+
cmd_shipped = cat $< > $@
170+
171+
$(obj)/%:: $(src)/%_shipped
172+
$(call cmd,shipped)
173+
174+
# Commands useful for building a boot image
175+
# ===========================================================================
176+
#
177+
# Use as following:
178+
#
179+
# target: source(s) FORCE
180+
# $(if_changed,ld/objcopy/gzip)
181+
#
182+
# and add target to extra-y so that we know we have to
183+
# read in the saved command line
184+
185+
# Linking
186+
# ---------------------------------------------------------------------------
187+
188+
quiet_cmd_ld = LD $@
189+
cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \
190+
$(filter-out FORCE,$^) -o $@
191+
192+
# Objcopy
193+
# ---------------------------------------------------------------------------
194+
195+
quiet_cmd_objcopy = OBJCOPY $@
196+
cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
197+
198+
# Gzip
199+
# ---------------------------------------------------------------------------
200+
201+
quiet_cmd_gzip = GZIP $@
202+
cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -f -9 > $@) || \
203+
(rm -f $@ ; false)
204+
205+
206+
# Bzip2
207+
# ---------------------------------------------------------------------------
208+
209+
# Bzip2 and LZMA do not include size in file... so we have to fake that;
210+
# append the size as a 32-bit littleendian number as gzip does.
211+
size_append = /bin/echo -ne $(shell \
212+
dec_size=0; \
213+
for F in $1; do \
214+
fsize=$$(stat -c "%s" $$F); \
215+
dec_size=$$(expr $$dec_size + $$fsize); \
216+
done; \
217+
printf "%08x" $$dec_size | \
218+
sed 's/\(..\)\(..\)\(..\)\(..\)/\\\\x\4\\\\x\3\\\\x\2\\\\x\1/g' \
219+
)
220+
221+
quiet_cmd_bzip2 = BZIP2 $@
222+
cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
223+
bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
224+
(rm -f $@ ; false)
225+
226+
# Lzma
227+
# ---------------------------------------------------------------------------
228+
229+
quiet_cmd_lzma = LZMA $@
230+
cmd_lzma = (cat $(filter-out FORCE,$^) | \
231+
lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
232+
(rm -f $@ ; false)

0 commit comments

Comments
 (0)