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kbuild: add real-prereqs shorthand for $(filter-out FORCE,$^)

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In Kbuild, if_changed and friends must have FORCE as a prerequisite.

Hence, $(filter-out FORCE,$^) or $(filter-out $(PHONY),$^) is a common
idiom to get the names of all the prerequisites except phony targets.

Add real-prereqs as a shorthand.

Note:
We cannot replace $(filter %.o,$^) in cmd_link_multi-m because $^ may
include auto-generated dependencies from the .*.cmd file when a single
object module is changed into a multi object module. Refer to commit
69ea912fda ("kbuild: remove unneeded link_multi_deps"). I added some
comment to avoid accidental breakage.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Masahiro Yamada 2019-01-17 19:02:43 +09:00
parent 5d680056cb
commit afa974b771
9 changed files with 25 additions and 19 deletions
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18
scripts/Makefile.lib
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@ -231,7 +231,7 @@ $(obj)/%: $(src)/%_shipped
# ---------------------------------------------------------------------------
quiet_cmd_ld = LD $@
cmd_ld = $(LD) $(ld_flags) $(filter-out FORCE,$^) -o $@
cmd_ld = $(LD) $(ld_flags) $(real-prereqs) -o $@
# Objcopy
# ---------------------------------------------------------------------------
@ -243,7 +243,7 @@ cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
# ---------------------------------------------------------------------------
quiet_cmd_gzip = GZIP $@
cmd_gzip = cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@
cmd_gzip = cat $(real-prereqs) | gzip -n -f -9 > $@
# DTC
# ---------------------------------------------------------------------------
@ -321,7 +321,7 @@ dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
# append the size as a 32-bit littleendian number as gzip does.
size_append = printf $(shell \
dec_size=0; \
for F in $(filter-out FORCE,$^); do \
for F in $(real-prereqs); do \
fsize=$$($(CONFIG_SHELL) $(srctree)/scripts/file-size.sh $$F); \
dec_size=$$(expr $$dec_size + $$fsize); \
done; \
@ -335,19 +335,19 @@ printf "%08x\n" $$dec_size | \
)
quiet_cmd_bzip2 = BZIP2 $@
cmd_bzip2 = (cat $(filter-out FORCE,$^) | bzip2 -9 && $(size_append)) > $@
cmd_bzip2 = (cat $(real-prereqs) | bzip2 -9 && $(size_append)) > $@
# Lzma
# ---------------------------------------------------------------------------
quiet_cmd_lzma = LZMA $@
cmd_lzma = (cat $(filter-out FORCE,$^) | lzma -9 && $(size_append)) > $@
cmd_lzma = (cat $(real-prereqs) | lzma -9 && $(size_append)) > $@
quiet_cmd_lzo = LZO $@
cmd_lzo = (cat $(filter-out FORCE,$^) | lzop -9 && $(size_append)) > $@
cmd_lzo = (cat $(real-prereqs) | lzop -9 && $(size_append)) > $@
quiet_cmd_lz4 = LZ4 $@
cmd_lz4 = (cat $(filter-out FORCE,$^) | lz4c -l -c1 stdin stdout && \
cmd_lz4 = (cat $(real-prereqs) | lz4c -l -c1 stdin stdout && \
$(size_append)) > $@
# U-Boot mkimage
@ -390,11 +390,11 @@ quiet_cmd_uimage = UIMAGE $@
# big dictionary would increase the memory usage too much in the multi-call
# decompression mode. A BCJ filter isn't used either.
quiet_cmd_xzkern = XZKERN $@
cmd_xzkern = (cat $(filter-out FORCE,$^) | \
cmd_xzkern = (cat $(real-prereqs) | \
sh $(srctree)/scripts/xz_wrap.sh && $(size_append)) > $@
quiet_cmd_xzmisc = XZMISC $@
cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
cmd_xzmisc = (cat $(real-prereqs) | \
xz --check=crc32 --lzma2=dict=1MiB) > $@
# ASM offsets