diff -ur camlidl-1.05.old/compiler/Makefile camlidl-1.05.byte/compiler/Makefile
--- camlidl-1.05.old/compiler/Makefile	2015-07-20 15:16:31.848993427 +0100
+++ camlidl-1.05.byte/compiler/Makefile	2015-07-20 15:22:59.352428185 +0100
@@ -32,6 +32,9 @@
 $(PROG): $(XOBJS)
 	$(OCAMLOPT) -o $(PROG) $(XOBJS)
 
+byte: $(OBJS)
+	$(OCAMLC) -o $(PROG) $(OBJS)
+
 clean::
 	rm -f $(PROG)
 
@@ -85,6 +88,8 @@
 install:
 	cp $(PROG) $(BINDIR)
 
+install-byte: install
+
 # Clean up
 clean::
 	rm -f *.cm[iox] *~
diff -ur camlidl-1.05.old/lib/Makefile camlidl-1.05.byte/lib/Makefile
--- camlidl-1.05.old/lib/Makefile	2002-04-22 12:50:47.000000000 +0100
+++ camlidl-1.05.byte/lib/Makefile	2015-07-20 15:32:15.716052397 +0100
@@ -22,6 +22,8 @@
 
 all: $(BYTELIB) $(NATIVELIB)
 
+byte: $(BYTELIB)
+
 $(BYTELIB): $(BYTEOBJS)
 	$(OCAMLC) -a -o $(BYTELIB) $(BYTEOBJS)
 
@@ -32,6 +34,9 @@
 	cp $(INTERFACES) $(BYTELIB) $(NATIVELIB) $(NATIVELIB:.cmxa=.$(LIBEXT)) $(OCAMLLIB)
 	cd $(OCAMLLIB); $(RANLIB) $(NATIVELIB:.cmxa=.$(LIBEXT))
 
+install-byte:
+	cp $(INTERFACES) $(BYTELIB) $(OCAMLLIB)
+
 .SUFFIXES: .mli .ml .cmi .cmo .cmx
 
 .mli.cmi:
diff -ur camlidl-1.05.old/Makefile camlidl-1.05.byte/Makefile
--- camlidl-1.05.old/Makefile	2000-08-19 12:04:55.000000000 +0100
+++ camlidl-1.05.byte/Makefile	2015-07-20 15:24:37.154537915 +0100
@@ -20,12 +20,24 @@
 	cd lib; $(MAKE) all
 	cd tools; $(MAKE) all
 
+byte:
+	cd compiler; $(MAKE) byte
+	cd runtime; $(MAKE) byte
+	cd lib; $(MAKE) byte
+	cd tools; $(MAKE) byte
+
 install:
 	cd compiler; $(MAKE) install
 	cd runtime; $(MAKE) install
 	cd lib; $(MAKE) install
 	cd tools; $(MAKE) install
 
+install-byte:
+	cd compiler; $(MAKE) install-byte
+	cd runtime; $(MAKE) install-byte
+	cd lib; $(MAKE) install-byte
+	cd tools; $(MAKE) install-byte
+
 clean:
 	cd compiler; $(MAKE) clean
 	cd runtime; $(MAKE) clean
diff -ur camlidl-1.05.old/runtime/Makefile.unix camlidl-1.05.byte/runtime/Makefile.unix
--- camlidl-1.05.old/runtime/Makefile.unix	2000-08-19 12:05:00.000000000 +0100
+++ camlidl-1.05.byte/runtime/Makefile.unix	2015-07-20 15:26:23.065656741 +0100
@@ -16,6 +16,8 @@
 
 all: libcamlidl.a
 
+byte: all
+
 libcamlidl.a: $(OBJS)
 	- rm -f $@
 	ar rc $@ $(OBJS)
@@ -26,6 +28,8 @@
 	cp libcamlidl.a $(OCAMLLIB)/libcamlidl.a
 	cd $(OCAMLLIB); $(RANLIB) libcamlidl.a
 
+install-byte: install
+
 clean:
 	rm -f *.a *.o
 
diff -ur camlidl-1.05.old/tools/Makefile.unix camlidl-1.05.byte/tools/Makefile.unix
--- camlidl-1.05.old/tools/Makefile.unix	2000-08-19 12:05:00.000000000 +0100
+++ camlidl-1.05.byte/tools/Makefile.unix	2015-07-20 15:26:01.051632043 +0100
@@ -14,8 +14,12 @@
 
 all:
 
+byte:
+
 install:
 
+install-byte:
+
 clean:
 
 depend: