Merge tag 'iommu-drivers-move-v5.8' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6-microblaze.git] / scripts / Makefile.lib
1 # SPDX-License-Identifier: GPL-2.0
2 # Backward compatibility
3 asflags-y  += $(EXTRA_AFLAGS)
4 ccflags-y  += $(EXTRA_CFLAGS)
5 cppflags-y += $(EXTRA_CPPFLAGS)
6 ldflags-y  += $(EXTRA_LDFLAGS)
7 ifneq ($(always),)
8 $(warning 'always' is deprecated. Please use 'always-y' instead)
9 always-y   += $(always)
10 endif
11 ifneq ($(hostprogs-y),)
12 $(warning 'hostprogs-y' is deprecated. Please use 'hostprogs' instead)
13 hostprogs  += $(hostprogs-y)
14 endif
15 ifneq ($(hostprogs-m),)
16 $(warning 'hostprogs-m' is deprecated. Please use 'hostprogs' instead)
17 hostprogs  += $(hostprogs-m)
18 endif
19
20 # flags that take effect in current and sub directories
21 KBUILD_AFLAGS += $(subdir-asflags-y)
22 KBUILD_CFLAGS += $(subdir-ccflags-y)
23
24 # Figure out what we need to build from the various variables
25 # ===========================================================================
26
27 # When an object is listed to be built compiled-in and modular,
28 # only build the compiled-in version
29 obj-m := $(filter-out $(obj-y),$(obj-m))
30
31 # Libraries are always collected in one lib file.
32 # Filter out objects already built-in
33 lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
34
35 # Subdirectories we need to descend into
36 subdir-ym := $(sort $(subdir-y) $(subdir-m) \
37                         $(patsubst %/,%, $(filter %/, $(obj-y) $(obj-m))))
38
39 # Handle objects in subdirs:
40 # - If we encounter foo/ in $(obj-y), replace it by foo/built-in.a and
41 #   foo/modules.order
42 # - If we encounter foo/ in $(obj-m), replace it by foo/modules.order
43 #
44 # Generate modules.order to determine modorder. Unfortunately, we don't have
45 # information about ordering between -y and -m subdirs. Just put -y's first.
46
47 ifdef need-modorder
48 obj-m := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m))
49 else
50 obj-m := $(filter-out %/, $(obj-m))
51 endif
52
53 ifdef need-builtin
54 obj-y           := $(patsubst %/, %/built-in.a, $(obj-y))
55 else
56 obj-y           := $(filter-out %/, $(obj-y))
57 endif
58
59 # If $(foo-objs), $(foo-y), $(foo-m), or $(foo-) exists, foo.o is a composite object
60 multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-))), $(m))))
61 multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)) $($(m:.o=-))), $(m))))
62 multi-used   := $(multi-used-y) $(multi-used-m)
63
64 # Replace multi-part objects by their individual parts,
65 # including built-in.a from subdirectories
66 real-obj-y := $(foreach m, $(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
67 real-obj-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)) $($(m:.o=-))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m)))
68
69 always-y += $(always-m)
70
71 # DTB
72 # If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built
73 extra-y                         += $(dtb-y)
74 extra-$(CONFIG_OF_ALL_DTBS)     += $(dtb-)
75
76 ifneq ($(CHECK_DTBS),)
77 extra-y += $(patsubst %.dtb,%.dt.yaml, $(dtb-y))
78 extra-$(CONFIG_OF_ALL_DTBS) += $(patsubst %.dtb,%.dt.yaml, $(dtb-))
79 endif
80
81 # Add subdir path
82
83 extra-y         := $(addprefix $(obj)/,$(extra-y))
84 always-y        := $(addprefix $(obj)/,$(always-y))
85 targets         := $(addprefix $(obj)/,$(targets))
86 obj-m           := $(addprefix $(obj)/,$(obj-m))
87 lib-y           := $(addprefix $(obj)/,$(lib-y))
88 real-obj-y      := $(addprefix $(obj)/,$(real-obj-y))
89 real-obj-m      := $(addprefix $(obj)/,$(real-obj-m))
90 multi-used-m    := $(addprefix $(obj)/,$(multi-used-m))
91 subdir-ym       := $(addprefix $(obj)/,$(subdir-ym))
92
93 # Finds the multi-part object the current object will be linked into.
94 # If the object belongs to two or more multi-part objects, list them all.
95 modname-multi = $(sort $(foreach m,$(multi-used),\
96                 $(if $(filter $*.o, $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$(m:.o=))))
97
98 __modname = $(if $(modname-multi),$(modname-multi),$(basetarget))
99
100 modname = $(subst $(space),:,$(__modname))
101 modfile = $(addprefix $(obj)/,$(__modname))
102
103 # target with $(obj)/ and its suffix stripped
104 target-stem = $(basename $(patsubst $(obj)/%,%,$@))
105
106 # These flags are needed for modversions and compiling, so we define them here
107 # $(modname_flags) defines KBUILD_MODNAME as the name of the module it will
108 # end up in (or would, if it gets compiled in)
109 name-fix = $(call stringify,$(subst $(comma),_,$(subst -,_,$1)))
110 basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
111 modname_flags  = -DKBUILD_MODNAME=$(call name-fix,$(modname))
112 modfile_flags  = -DKBUILD_MODFILE=$(call stringify,$(modfile))
113
114 orig_c_flags   = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) \
115                  $(ccflags-y) $(CFLAGS_$(target-stem).o)
116 _c_flags       = $(filter-out $(CFLAGS_REMOVE_$(target-stem).o), $(orig_c_flags))
117 orig_a_flags   = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) \
118                  $(asflags-y) $(AFLAGS_$(target-stem).o)
119 _a_flags       = $(filter-out $(AFLAGS_REMOVE_$(target-stem).o), $(orig_a_flags))
120 _cpp_flags     = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(target-stem).lds)
121
122 #
123 # Enable gcov profiling flags for a file, directory or for all files depending
124 # on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL
125 # (in this order)
126 #
127 ifeq ($(CONFIG_GCOV_KERNEL),y)
128 _c_flags += $(if $(patsubst n%,, \
129                 $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \
130                 $(CFLAGS_GCOV))
131 endif
132
133 #
134 # Enable address sanitizer flags for kernel except some files or directories
135 # we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE)
136 #
137 ifeq ($(CONFIG_KASAN),y)
138 _c_flags += $(if $(patsubst n%,, \
139                 $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \
140                 $(CFLAGS_KASAN), $(CFLAGS_KASAN_NOSANITIZE))
141 endif
142
143 ifeq ($(CONFIG_UBSAN),y)
144 _c_flags += $(if $(patsubst n%,, \
145                 $(UBSAN_SANITIZE_$(basetarget).o)$(UBSAN_SANITIZE)$(CONFIG_UBSAN_SANITIZE_ALL)), \
146                 $(CFLAGS_UBSAN))
147 endif
148
149 ifeq ($(CONFIG_KCOV),y)
150 _c_flags += $(if $(patsubst n%,, \
151         $(KCOV_INSTRUMENT_$(basetarget).o)$(KCOV_INSTRUMENT)$(CONFIG_KCOV_INSTRUMENT_ALL)), \
152         $(CFLAGS_KCOV))
153 endif
154
155 #
156 # Enable KCSAN flags except some files or directories we don't want to check
157 # (depends on variables KCSAN_SANITIZE_obj.o, KCSAN_SANITIZE)
158 #
159 ifeq ($(CONFIG_KCSAN),y)
160 _c_flags += $(if $(patsubst n%,, \
161         $(KCSAN_SANITIZE_$(basetarget).o)$(KCSAN_SANITIZE)y), \
162         $(CFLAGS_KCSAN))
163 endif
164
165 # $(srctree)/$(src) for including checkin headers from generated source files
166 # $(objtree)/$(obj) for including generated headers from checkin source files
167 ifeq ($(KBUILD_EXTMOD),)
168 ifdef building_out_of_srctree
169 _c_flags   += -I $(srctree)/$(src) -I $(objtree)/$(obj)
170 _a_flags   += -I $(srctree)/$(src) -I $(objtree)/$(obj)
171 _cpp_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj)
172 endif
173 endif
174
175 part-of-module = $(if $(filter $(basename $@).o, $(real-obj-m)),y)
176 quiet_modtag = $(if $(part-of-module),[M],   )
177
178 modkern_cflags =                                          \
179         $(if $(part-of-module),                           \
180                 $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
181                 $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL) $(modfile_flags))
182
183 modkern_aflags = $(if $(part-of-module),                                \
184                         $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE),       \
185                         $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL))
186
187 c_flags        = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
188                  -include $(srctree)/include/linux/compiler_types.h       \
189                  $(_c_flags) $(modkern_cflags)                           \
190                  $(basename_flags) $(modname_flags)
191
192 a_flags        = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
193                  $(_a_flags) $(modkern_aflags)
194
195 cpp_flags      = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE)     \
196                  $(_cpp_flags)
197
198 ld_flags       = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F))
199
200 DTC_INCLUDE    := $(srctree)/scripts/dtc/include-prefixes
201
202 dtc_cpp_flags  = -Wp,-MMD,$(depfile).pre.tmp -nostdinc                    \
203                  $(addprefix -I,$(DTC_INCLUDE))                          \
204                  -undef -D__DTS__
205
206 # Useful for describing the dependency of composite objects
207 # Usage:
208 #   $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
209 define multi_depend
210 $(foreach m, $(notdir $1), \
211         $(eval $(obj)/$m: \
212         $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
213 endef
214
215 # Shipped files
216 # ===========================================================================
217
218 quiet_cmd_shipped = SHIPPED $@
219 cmd_shipped = cat $< > $@
220
221 $(obj)/%: $(src)/%_shipped
222         $(call cmd,shipped)
223
224 # Commands useful for building a boot image
225 # ===========================================================================
226 #
227 #       Use as following:
228 #
229 #       target: source(s) FORCE
230 #               $(if_changed,ld/objcopy/gzip)
231 #
232 #       and add target to extra-y so that we know we have to
233 #       read in the saved command line
234
235 # Linking
236 # ---------------------------------------------------------------------------
237
238 quiet_cmd_ld = LD      $@
239       cmd_ld = $(LD) $(ld_flags) $(real-prereqs) -o $@
240
241 # Archive
242 # ---------------------------------------------------------------------------
243
244 quiet_cmd_ar = AR      $@
245       cmd_ar = rm -f $@; $(AR) cDPrsT $@ $(real-prereqs)
246
247 # Objcopy
248 # ---------------------------------------------------------------------------
249
250 quiet_cmd_objcopy = OBJCOPY $@
251 cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
252
253 # Gzip
254 # ---------------------------------------------------------------------------
255
256 quiet_cmd_gzip = GZIP    $@
257       cmd_gzip = cat $(real-prereqs) | $(_GZIP) -n -f -9 > $@
258
259 # DTC
260 # ---------------------------------------------------------------------------
261 DTC ?= $(objtree)/scripts/dtc/dtc
262
263 # Disable noisy checks by default
264 ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),)
265 DTC_FLAGS += -Wno-unit_address_vs_reg \
266         -Wno-unit_address_format \
267         -Wno-avoid_unnecessary_addr_size \
268         -Wno-alias_paths \
269         -Wno-graph_child_address \
270         -Wno-simple_bus_reg \
271         -Wno-unique_unit_address \
272         -Wno-pci_device_reg
273 endif
274
275 ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),)
276 DTC_FLAGS += -Wnode_name_chars_strict \
277         -Wproperty_name_chars_strict
278 endif
279
280 DTC_FLAGS += $(DTC_FLAGS_$(basetarget))
281
282 # Generate an assembly file to wrap the output of the device tree compiler
283 quiet_cmd_dt_S_dtb= DTB     $@
284 cmd_dt_S_dtb=                                           \
285 {                                                       \
286         echo '\#include <asm-generic/vmlinux.lds.h>';   \
287         echo '.section .dtb.init.rodata,"a"';           \
288         echo '.balign STRUCT_ALIGNMENT';                \
289         echo '.global __dtb_$(subst -,_,$(*F))_begin';  \
290         echo '__dtb_$(subst -,_,$(*F))_begin:';         \
291         echo '.incbin "$<" ';                           \
292         echo '__dtb_$(subst -,_,$(*F))_end:';           \
293         echo '.global __dtb_$(subst -,_,$(*F))_end';    \
294         echo '.balign STRUCT_ALIGNMENT';                \
295 } > $@
296
297 $(obj)/%.dtb.S: $(obj)/%.dtb FORCE
298         $(call if_changed,dt_S_dtb)
299
300 quiet_cmd_dtc = DTC     $@
301 cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
302         $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
303         $(DTC) -O $(patsubst .%,%,$(suffix $@)) -o $@ -b 0 \
304                 $(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \
305                 -d $(depfile).dtc.tmp $(dtc-tmp) ; \
306         cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
307
308 $(obj)/%.dtb: $(src)/%.dts $(DTC) FORCE
309         $(call if_changed_dep,dtc)
310
311 DT_CHECKER ?= dt-validate
312 DT_BINDING_DIR := Documentation/devicetree/bindings
313 # DT_TMP_SCHEMA may be overridden from Documentation/devicetree/bindings/Makefile
314 DT_TMP_SCHEMA ?= $(objtree)/$(DT_BINDING_DIR)/processed-schema.yaml
315
316 quiet_cmd_dtb_check =   CHECK   $@
317       cmd_dtb_check =   $(DT_CHECKER) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@
318
319 define rule_dtc
320         $(call cmd_and_fixdep,dtc)
321         $(call cmd,dtb_check)
322 endef
323
324 $(obj)/%.dt.yaml: $(src)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE
325         $(call if_changed_rule,dtc,yaml)
326
327 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
328
329 # Bzip2
330 # ---------------------------------------------------------------------------
331
332 # Bzip2 and LZMA do not include size in file... so we have to fake that;
333 # append the size as a 32-bit littleendian number as gzip does.
334 size_append = printf $(shell                                            \
335 dec_size=0;                                                             \
336 for F in $(real-prereqs); do                                    \
337         fsize=$$($(CONFIG_SHELL) $(srctree)/scripts/file-size.sh $$F);  \
338         dec_size=$$(expr $$dec_size + $$fsize);                         \
339 done;                                                                   \
340 printf "%08x\n" $$dec_size |                                            \
341         sed 's/\(..\)/\1 /g' | {                                        \
342                 read ch0 ch1 ch2 ch3;                                   \
343                 for ch in $$ch3 $$ch2 $$ch1 $$ch0; do                   \
344                         printf '%s%03o' '\\' $$((0x$$ch));              \
345                 done;                                                   \
346         }                                                               \
347 )
348
349 quiet_cmd_bzip2 = BZIP2   $@
350       cmd_bzip2 = { cat $(real-prereqs) | $(_BZIP2) -9; $(size_append); } > $@
351
352 # Lzma
353 # ---------------------------------------------------------------------------
354
355 quiet_cmd_lzma = LZMA    $@
356       cmd_lzma = { cat $(real-prereqs) | $(LZMA) -9; $(size_append); } > $@
357
358 quiet_cmd_lzo = LZO     $@
359       cmd_lzo = { cat $(real-prereqs) | $(_LZOP) -9; $(size_append); } > $@
360
361 quiet_cmd_lz4 = LZ4     $@
362       cmd_lz4 = { cat $(real-prereqs) | $(LZ4) -l -c1 stdin stdout; \
363                   $(size_append); } > $@
364
365 # U-Boot mkimage
366 # ---------------------------------------------------------------------------
367
368 MKIMAGE := $(srctree)/scripts/mkuboot.sh
369
370 # SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces
371 # the number of overrides in arch makefiles
372 UIMAGE_ARCH ?= $(SRCARCH)
373 UIMAGE_COMPRESSION ?= $(if $(2),$(2),none)
374 UIMAGE_OPTS-y ?=
375 UIMAGE_TYPE ?= kernel
376 UIMAGE_LOADADDR ?= arch_must_set_this
377 UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR)
378 UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)'
379
380 quiet_cmd_uimage = UIMAGE  $@
381       cmd_uimage = $(BASH) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \
382                         -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \
383                         -T $(UIMAGE_TYPE) \
384                         -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \
385                         -n $(UIMAGE_NAME) -d $< $@
386
387 # XZ
388 # ---------------------------------------------------------------------------
389 # Use xzkern to compress the kernel image and xzmisc to compress other things.
390 #
391 # xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
392 # of the kernel decompressor. A BCJ filter is used if it is available for
393 # the target architecture. xzkern also appends uncompressed size of the data
394 # using size_append. The .xz format has the size information available at
395 # the end of the file too, but it's in more complex format and it's good to
396 # avoid changing the part of the boot code that reads the uncompressed size.
397 # Note that the bytes added by size_append will make the xz tool think that
398 # the file is corrupt. This is expected.
399 #
400 # xzmisc doesn't use size_append, so it can be used to create normal .xz
401 # files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
402 # big dictionary would increase the memory usage too much in the multi-call
403 # decompression mode. A BCJ filter isn't used either.
404 quiet_cmd_xzkern = XZKERN  $@
405       cmd_xzkern = { cat $(real-prereqs) | sh $(srctree)/scripts/xz_wrap.sh; \
406                      $(size_append); } > $@
407
408 quiet_cmd_xzmisc = XZMISC  $@
409       cmd_xzmisc = cat $(real-prereqs) | $(XZ) --check=crc32 --lzma2=dict=1MiB > $@
410
411 # ASM offsets
412 # ---------------------------------------------------------------------------
413
414 # Default sed regexp - multiline due to syntax constraints
415 #
416 # Use [:space:] because LLVM's integrated assembler inserts <tab> around
417 # the .ascii directive whereas GCC keeps the <space> as-is.
418 define sed-offsets
419         's:^[[:space:]]*\.ascii[[:space:]]*"\(.*\)".*:\1:; \
420         /^->/{s:->#\(.*\):/* \1 */:; \
421         s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
422         s:->::; p;}'
423 endef
424
425 # Use filechk to avoid rebuilds when a header changes, but the resulting file
426 # does not
427 define filechk_offsets
428          echo "#ifndef $2"; \
429          echo "#define $2"; \
430          echo "/*"; \
431          echo " * DO NOT MODIFY."; \
432          echo " *"; \
433          echo " * This file was generated by Kbuild"; \
434          echo " */"; \
435          echo ""; \
436          sed -ne $(sed-offsets) < $<; \
437          echo ""; \
438          echo "#endif"
439 endef