Make the rules for compiling rustc explicit

Not sure why they were implicit since their dependencies only work for rustc

Author: brson

mk/stage1.mk

@@ -39,7 +39,8 @@ stage1/%.o: stage1/%.s
 	@$(call E, assemble [gcc]: $@)
 	$(Q)gcc $(CFG_GCCISH_CFLAGS) -o $@ -c $<
 
-stage1/%$(X): $(COMPILER_CRATE) $(COMPILER_INPUTS) $(SREQ0) stage0/intrinsics.bc
+stage1/rustc$(X): $(COMPILER_CRATE) $(COMPILER_INPUTS) $(SREQ0) \
+	stage0/intrinsics.bc
 	@$(call E, compile_and_link: $@)
 	$(STAGE0) -o $@ $<
 

mk/stage2.mk

@@ -39,6 +39,7 @@ stage2/%.o: stage2/%.s
 	@$(call E, assemble [gcc]: $@)
 	$(Q)gcc $(CFG_GCCISH_CFLAGS) -o $@ -c $<
 
-stage2/%$(X): $(COMPILER_CRATE) $(COMPILER_INPUTS) $(SREQ1) stage1/intrinsics.bc
+stage2/rustc$(X): $(COMPILER_CRATE) $(COMPILER_INPUTS) $(SREQ1) \
+	stage1/intrinsics.bc
 	@$(call E, compile_and_link: $@)
 	$(STAGE1) -o $@ $<

mk/stage3.mk

@@ -39,6 +39,6 @@ stage3/%.o: stage3/%.s
 	@$(call E, assemble [gcc]: $@)
 	$(Q)gcc $(CFG_GCCISH_CFLAGS) -o $@ -c $<
 
-stage3/%$(X): $(COMPILER_CRATE) $(COMPILER_INPUTS) $(SREQ2) stage2/intrinsics.bc
+stage3/rustc$(X): $(COMPILER_CRATE) $(COMPILER_INPUTS) $(SREQ2) stage2/intrinsics.bc
 	@$(call E, compile_and_link: $@)
 	$(STAGE2) -o $@ $<