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authorMasahiro Yamada <yamada.masahiro@socionext.com>2019-01-17 19:02:43 +0900
committerMasahiro Yamada <yamada.masahiro@socionext.com>2019-01-28 09:11:17 +0900
commitafa974b771281fd89e8fdcb71152152f17fb8303 (patch)
treeb6a3de04148c2207d3cd094b70820160e24d0420 /arch/x86
parent5d680056cb6de18f0221e321ee51d60ccd700781 (diff)
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kbuild: add real-prereqs shorthand for $(filter-out FORCE,$^)
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 69ea912fda74 ("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>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/realmode/rm/Makefile3
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/realmode/rm/Makefile b/arch/x86/realmode/rm/Makefile
index 4463fa72db94..394377c9f7f8 100644
--- a/arch/x86/realmode/rm/Makefile
+++ b/arch/x86/realmode/rm/Makefile
@@ -37,8 +37,7 @@ REALMODE_OBJS = $(addprefix $(obj)/,$(realmode-y))
sed-pasyms := -n -r -e 's/^([0-9a-fA-F]+) [ABCDGRSTVW] (.+)$$/pa_\2 = \2;/p'
quiet_cmd_pasyms = PASYMS $@
- cmd_pasyms = $(NM) $(filter-out FORCE,$^) | \
- sed $(sed-pasyms) | sort | uniq > $@
+ cmd_pasyms = $(NM) $(real-prereqs) | sed $(sed-pasyms) | sort | uniq > $@
targets += pasyms.h
$(obj)/pasyms.h: $(REALMODE_OBJS) FORCE