Install runtime artifacts and verify external builds

Makefile

@@ -49,7 +49,7 @@ LIBS = unix.cmxa
 
 .PHONY: all clean test bench install uninstall
 
-all: deltac $(LIB_ARCHIVE) $(RUNTIME_ARCHIVE) $(TEST_EXE)
+all: deltac $(LIB_ARCHIVE) $(RUNTIME_ARCHIVE) $(RUNTIME_BYTE) $(TEST_EXE)
 
 $(BUILD):
 	mkdir -p $(BUILD)
@@ -139,9 +139,12 @@ $(RUNTIME_ARCHIVE) $(RUNTIME_NATIVE): $(RT_CMX)
 ifeq ($(strip $(RT_ML)),)
 	@echo "no runtime sources"
 else
-	$(OCAMLOPT) -a -o $@ $(RT_CMX)
+	$(OCAMLOPT) -a -o $@ $(RT_ORDER)
 endif
 
+$(RUNTIME_BYTE): $(patsubst $(RUNTIME_DIR)/%.ml,$(BUILD)/%.cmo,$(RT_ML))
+	$(OCAMLC) -a -o $@ $(patsubst $(RUNTIME_DIR)/%.ml,$(BUILD)/%.cmo,$(RT_ML))
+
 ifeq ($(strip $(TEST_ML)),)
 TEST_EXE =
 else
@@ -157,12 +160,12 @@ $(BENCH_EXE): $(BUILD)/bench.cmx $(LIB_ARCHIVE) $(RUNTIME_ARCHIVE) deltac
 endif
 
 test: $(TEST_EXE)
-	DELTA_ROOT=$(CURDIR) DELTA_BUILD_DIR=$(CURDIR)/$(BUILD) DELTA_OCAMLOPT="$(OCAMLOPT)" ./$(TEST_EXE)
+	DELTA_ROOT=$(CURDIR) DELTA_BUILD_DIR=$(CURDIR)/$(BUILD) DELTA_RUNTIME_DIR=$(CURDIR)/$(BUILD) DELTA_OCAMLOPT="$(OCAMLOPT)" ./$(TEST_EXE)
 
 bench: $(BENCH_EXE)
 	DELTA_ROOT=$(CURDIR) DELTA_BUILD_DIR=$(CURDIR)/$(BUILD) DELTA_OCAMLOPT="$(OCAMLOPT)" ./$(BENCH_EXE)
 
-install: deltac $(RUNTIME_ARCHIVE)
+install: deltac $(RUNTIME_ARCHIVE) $(RUNTIME_BYTE)
 	$(INSTALL) -d $(DESTDIR)$(BINDIR) $(DESTDIR)$(LIBDIR)
 	$(INSTALL) -m 755 deltac $(DESTDIR)$(BINDIR)/deltac
 	$(INSTALL) -m 644 $(RUNTIME_ARTIFACTS) $(DESTDIR)$(LIBDIR)/