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kbuild: remove ar-option and KBUILD_ARFLAGS

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Commit 40df759e2b ("kbuild: Fix build with binutils <= 2.19")
introduced ar-option and KBUILD_ARFLAGS to deal with old binutils.

According to Documentation/process/changes.rst, the current minimal
supported version of binutils is 2.21 so you can assume the 'D' option
is always supported. Not only GNU ar but also llvm-ar supports it.

With the 'D' option hard-coded, there is no more user of ar-option
or KBUILD_ARFLAGS.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
This commit is contained in:
Masahiro Yamada
2019-10-01 09:20:33 +09:00
parent 54ecb8f702
commit 13dc8c029c
6 changed files with 3 additions and 17 deletions
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scripts/Makefile.build
+1 -1
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@@ -389,7 +389,7 @@ $(sort $(subdir-obj-y)): $(subdir-ym) ;
ifdef builtin-target
quiet_cmd_ar_builtin = AR $@
cmd_ar_builtin = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS) $@ $(real-prereqs)
cmd_ar_builtin = rm -f $@; $(AR) cDPrST $@ $(real-prereqs)
$(builtin-target): $(real-obj-y) FORCE
$(call if_changed,ar_builtin)