Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
kbuild: read *.mod to get objects passed to $(LD) or $(AR)
ld and ar support @file, which command-line options are read from.
Now that *.mod lists the member objects in the correct order, without
duplication, it is ready to be passed to ld and ar.
By using the @file syntax, people will not be worried about the pitfall
described in the NOTE.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
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+3
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scripts/Makefile.build
+3
-7
scripts/Makefile.build
···
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$(obj)/lib.a: $(lib-y) FORCE
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$(call if_changed,ar_lib)
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-
# NOTE:
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# Do not replace $(filter %.o,^) with $(real-prereqs). When a single object
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# module is turned into a multi object module, $^ will contain header file
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# dependencies recorded in the .*.cmd file.
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ifneq ($(CONFIG_LTO_CLANG)$(CONFIG_X86_KERNEL_IBT),)
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quiet_cmd_link_multi-m = AR [M] $@
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cmd_link_multi-m = \
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$(cmd_update_lto_symversions); \
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rm -f $@; \
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$(AR) cDPrsT $@ $(filter %.o,$^)
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$(AR) cDPrsT $@ @$(patsubst %.o,%.mod,$@)
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else
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quiet_cmd_link_multi-m = LD [M] $@
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cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(filter %.o,$^)
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cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ @$(patsubst %.o,%.mod,$@)
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endif
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-
$(multi-obj-m): FORCE
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$(multi-obj-m): %.o: %.mod FORCE
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$(call if_changed,link_multi-m)
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$(call multi_depend, $(multi-obj-m), .o, -objs -y -m)
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