build: Add USE_SNAPSHOT_STDLIB. Set to 1

Author: brson

mk/target.mk

@@ -10,6 +10,7 @@
 # (resp. corelib) from the working directory.
 USE_SNAPSHOT_RUNTIME=1
 USE_SNAPSHOT_CORELIB=1
+USE_SNAPSHOT_STDLIB=1
 
 define TARGET_STAGE_N
 
@@ -18,13 +19,6 @@ $$(TLIB$(1)_T_$(2)_H_$(3))/libmorestack.a: \
 	@$$(call E, cp: $$@)
 	$$(Q)cp $$< $$@
 
-$$(TLIB$(1)_T_$(2)_H_$(3))/$$(CFG_STDLIB): \
-		$$(STDLIB_CRATE) $$(STDLIB_INPUTS) \
-	        $$(TLIB$(1)_T_$(2)_H_$(3))/$$(CFG_CORELIB) \
-		$$(TSREQ$(1)_T_$(2)_H_$(3))
-	@$$(call E, compile_and_link: $$@)
-	$$(STAGE$(1)_T_$(2)_H_$(3)) -o $$@ $$< && touch $$@
-
 $$(TLIB$(1)_T_$(2)_H_$(3))/$$(CFG_RUSTLLVM): \
 		rustllvm/$(2)/$$(CFG_RUSTLLVM)
 	@$$(call E, cp: $$@)
@@ -116,6 +110,30 @@ $$(TLIB$(1)_T_$(2)_H_$(3))/$$(CFG_CORELIB): \
 
 endef
 
+define TARGET_STDLIB_FROM_SNAPSHOT
+
+$$(TLIB$(1)_T_$(2)_H_$(3))/$$(CFG_STDLIB): \
+		$$(HLIB$(1)_H_$(3))/$$(CFG_STDLIB) \
+		$$(STDLIB_INPUTS) \
+		$$(TSREQ$(1)_T_$(2)_H_$(3))
+	@$$(call E, cp: $$@)
+	$$(Q)cp $$< $$@
+	$$(Q)cp $$(HLIB$(1)_H_$(3))/$$(STDLIB_GLOB) \
+		$$(TLIB$(1)_T_$(2)_H_$(3))
+
+endef
+
+define TARGET_STDLIB_FROM_WD
+
+$$(TLIB$(1)_T_$(2)_H_$(3))/$$(CFG_STDLIB): \
+		$$(STDLIB_CRATE) $$(STDLIB_INPUTS) \
+	        $$(TLIB$(1)_T_$(2)_H_$(3))/$$(CFG_CORELIB) \
+		$$(TSREQ$(1)_T_$(2)_H_$(3))
+	@$$(call E, compile_and_link: $$@)
+	$$(STAGE$(1)_T_$(2)_H_$(3)) -o $$@ $$< && touch $$@
+
+endef
+
 # In principle, each host can build each target:
 $(foreach source,$(CFG_TARGET_TRIPLES),				\
  $(foreach target,$(CFG_TARGET_TRIPLES),			\
@@ -142,6 +160,14 @@ else
 		$(eval $(call TARGET_CORELIB_FROM_WD,0,$(src),$(src))))
 endif
 
+ifeq ($(USE_SNAPSHOT_STDLIB),1)
+    $(foreach src,$(CFG_HOST_TRIPLE),\
+		$(eval $(call TARGET_STDLIB_FROM_SNAPSHOT,0,$(src),$(src))))
+else
+    $(foreach src,$(CFG_HOST_TRIPLE),\
+		$(eval $(call TARGET_STDLIB_FROM_WD,0,$(src),$(src))))
+endif
+
 # Non-host triples build the stage0 runtime from the working directory
 $(foreach source,$(CFG_TARGET_TRIPLES),				\
  $(foreach target,$(NON_HOST_TRIPLES),				\
@@ -158,5 +184,8 @@ $(foreach source,$(CFG_TARGET_TRIPLES),				\
   $(eval $(call TARGET_CORELIB_FROM_WD,1,$(target),$(source)))	\
   $(eval $(call TARGET_CORELIB_FROM_WD,2,$(target),$(source)))	\
   $(eval $(call TARGET_CORELIB_FROM_WD,3,$(target),$(source)))	\
+  $(eval $(call TARGET_STDLIB_FROM_WD,1,$(target),$(source)))	\
+  $(eval $(call TARGET_STDLIB_FROM_WD,2,$(target),$(source)))	\
+  $(eval $(call TARGET_STDLIB_FROM_WD,3,$(target),$(source)))	\
 ))