diff -Nru a/Makefile b/Makefile
--- a/Makefile	2017-11-04 04:18:56.000000000 +0100
+++ b/Makefile	2018-08-27 21:45:59.382830935 +0200
@@ -18,7 +18,7 @@
 CARCHIVE=lib$(CARCHIVE_NAME)$(EXT_LIB)
 
 # Flags for the C compiler.
-CFLAGS=-DFULL_UNROLL -O2 -I$(EXPAT_INCDIR)
+CFLAGS+=$(RPM_OPT_FLAGS) -DFULL_UNROLL -O2 -I$(EXPAT_INCDIR)
 
 OCAMLFIND=ocamlfind
 OCAMLPKGS=-package bytes
@@ -102,12 +102,12 @@
 .SUFFIXES: .ml .mli .cmo .cmi .cmx
 
 .mli.cmi:
-	$(OCAMLC) -c $(COMPFLAGS) $<
+	$(OCAMLC) -g -c $(COMPFLAGS) $<
 .ml.cmo:
-	$(OCAMLC) -c $(COMPLAGS) $<
+	$(OCAMLC) -g -c $(COMPLAGS) $<
 .ml.cmx:
-	$(OCAMLOPT) -c $(COMPFLAGS) $<
+	$(OCAMLOPT) -g -c $(COMPFLAGS) $<
 .c.o:
-	$(OCAMLC) -c -ccopt "$(CFLAGS)" $<
+	$(OCAMLC) -g -c -ccopt "$(CFLAGS)" $<
 
 include depend