rust/mk/stage0.mk

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# Extract the snapshot host compiler
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$(HBIN0_H_$(CFG_BUILD))/:
mkdir -p $@
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$(HLIB0_H_$(CFG_BUILD))/:
mkdir -p $@
$(SNAPSHOT_RUSTC_POST_CLEANUP): \
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$(S)src/snapshots.txt \
$(S)src/etc/get-snapshot.py $(MKFILE_DEPS) \
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| $(HBIN0_H_$(CFG_BUILD))/
@$(call E, fetch: $@)
# Note: the variable "SNAPSHOT_FILE" is generally not set, and so
# we generally only pass one argument to this script.
ifdef CFG_ENABLE_LOCAL_RUST
$(Q)$(S)src/etc/local_stage0.sh $(CFG_BUILD) $(CFG_LOCAL_RUST_ROOT) rustlib
else
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$(Q)$(CFG_PYTHON) $(S)src/etc/get-snapshot.py $(CFG_BUILD) $(SNAPSHOT_FILE)
endif
$(Q)touch $@
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# For other targets, let the host build the target:
define BOOTSTRAP_STAGE0
# $(1) target to bootstrap
# $(2) stage to bootstrap from
# $(3) target to bootstrap from
$(HBIN0_H_$(1))/:
mkdir -p $@
$(HLIB0_H_$(1))/:
mkdir -p $@
$$(HBIN0_H_$(1))/rustc$$(X_$(1)): \
$$(TBIN$(2)_T_$(1)_H_$(3))/rustc$$(X_$(1)) \
| $(HBIN0_H_$(1))/
@$$(call E, cp: $$@)
$$(Q)cp $$< $$@
endef
# Use stage1 to build other architectures: then you don't have to wait
# for stage2, but you get the latest updates to the compiler source.
$(foreach t,$(NON_BUILD_HOST), \
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$(eval $(call BOOTSTRAP_STAGE0,$(t),1,$(CFG_BUILD))))