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kbuild: thin archives use P option to ar

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The P option makes ar do full path name matching and can prevent ar
from discarding files with duplicate names in some cases of creating
thin archives from thin archives. The sh architecture in particular
loses some object files from its kernel/cpu/sh*/ directories without
this option.

This could be a bug in binutils ar, but the P option should not cause
any negative effects so it is safe to use to work around this with.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Nicholas Piggin 2017-06-09 15:24:14 +10:00 committed by Masahiro Yamada
parent 1328a1ae0e
commit 9a6cfca4f4
2 changed files with 5 additions and 5 deletions
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8
scripts/Makefile.build
View File

@ -437,8 +437,8 @@ $(sort $(subdir-obj-y)): $(subdir-ym) ;
ifdef builtin-target
ifdef CONFIG_THIN_ARCHIVES
cmd_make_builtin = rm -f $@; $(AR) rcST$(KBUILD_ARFLAGS)
cmd_make_empty_builtin = rm -f $@; $(AR) rcST$(KBUILD_ARFLAGS)
cmd_make_builtin = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS)
cmd_make_empty_builtin = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS)
quiet_cmd_link_o_target = AR $@
else
cmd_make_builtin = $(LD) $(ld_flags) -r -o
@ -478,7 +478,7 @@ ifdef lib-target
quiet_cmd_link_l_target = AR $@
ifdef CONFIG_THIN_ARCHIVES
cmd_link_l_target = rm -f $@; $(AR) rcsT$(KBUILD_ARFLAGS) $@ $(lib-y)
cmd_link_l_target = rm -f $@; $(AR) rcsTP$(KBUILD_ARFLAGS) $@ $(lib-y)
else
cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y)
endif
@ -531,7 +531,7 @@ cmd_link_multi-link = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secana
ifdef CONFIG_THIN_ARCHIVES
quiet_cmd_link_multi-y = AR $@
cmd_link_multi-y = rm -f $@; $(AR) rcST$(KBUILD_ARFLAGS) $@ $(link_multi_deps)
cmd_link_multi-y = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS) $@ $(link_multi_deps)
else
quiet_cmd_link_multi-y = LD $@
cmd_link_multi-y = $(cmd_link_multi-link)

2
scripts/link-vmlinux.sh
View File

@ -50,7 +50,7 @@ archive_builtin()
if [ -n "${CONFIG_THIN_ARCHIVES}" ]; then
info AR built-in.o
rm -f built-in.o;
${AR} rcsT${KBUILD_ARFLAGS} built-in.o \
${AR} rcsTP${KBUILD_ARFLAGS} built-in.o \
${KBUILD_VMLINUX_INIT} \
${KBUILD_VMLINUX_MAIN}
fi