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# SPDX-License-Identifier: GPL-2.0-only
PHONY := __default
__default: vmlinux.a
include include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
include $(srctree)/scripts/Makefile.lib
# Link of built-in-fixup.a
# ---------------------------------------------------------------------------
quiet_cmd_ar_builtin_fixup = AR $@
cmd_ar_builtin_fixup = \
rm -f $@; \
$(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \
$(AR) mPi $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt)
targets += built-in-fixup.a
built-in-fixup.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE
$(call if_changed,ar_builtin_fixup)
ifdef CONFIG_LTO_CLANG_THIN_DIST
quiet_cmd_builtin.order = GEN $@
cmd_builtin.order = $(AR) t $< > $@
targets += builtin.order
builtin.order: built-in-fixup.a FORCE
$(call if_changed,builtin.order)
quiet_cmd_ld_thinlto_index = LD $@
cmd_ld_thinlto_index = \
$(LD) $(KBUILD_LDFLAGS) -r --thinlto-index-only=$@ @$<
targets += vmlinux.thinlto-index
vmlinux.thinlto-index: builtin.order FORCE
$(call if_changed,ld_thinlto_index)
quiet_cmd_ar_vmlinux.a = GEN $@
cmd_ar_vmlinux.a = \
rm -f $@; \
while read -r obj; do \
if grep -Fqx $${obj} $(word 2, $^); then \
echo $${obj%.o}.thinlto-native.o; \
else \
echo $${obj}; \
fi; \
done < $< | xargs $(AR) cDPrS --thin $@
targets += vmlinux.a
vmlinux.a: builtin.order vmlinux.thinlto-index FORCE
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.thinlto
$(call if_changed,ar_vmlinux.a)
else
# vmlinux.a
# ---------------------------------------------------------------------------
targets += vmlinux.a
vmlinux.a: built-in-fixup.a FORCE
$(call if_changed,copy)
endif
# Add FORCE to the prerequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------
PHONY += FORCE
FORCE:
# Read all saved command lines and dependencies for the $(targets) we
# may be building above, using $(if_changed{,_dep}). As an
# optimization, we don't need to read them if the target does not
# exist, we will rebuild anyway in that case.
existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
.PHONY: $(PHONY)
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