diff -ur camlspotter-camlimages-8ca76028cff3.old/OMakefile camlspotter-camlimages-8ca76028cff3/OMakefile
--- camlspotter-camlimages-8ca76028cff3.old/OMakefile	2017-11-20 10:50:59.000000000 +0000
+++ camlspotter-camlimages-8ca76028cff3/OMakefile	2017-11-22 14:19:46.903902025 +0000
@@ -19,7 +19,7 @@
 # For release, -warn-error should not be put
 
 # OCAMLFLAGS= -w A-4-9-35-37-40-41-42-44-45-48
-OCAMLFLAGS= -w A-3-4-9-37-40-41-42-44-45-41-48-50 -safe-string
+OCAMLFLAGS= -w A-3-4-9-37-40-41-42-44-45-41-48-50 -safe-string -g
 
 # For the development, -warn-error A is turned on
 if $(file-exists DEV)
diff -ur camlspotter-camlimages-8ca76028cff3.old/OMyMakeroot camlspotter-camlimages-8ca76028cff3/OMyMakeroot
--- camlspotter-camlimages-8ca76028cff3.old/OMyMakeroot	2017-11-20 10:50:59.000000000 +0000
+++ camlspotter-camlimages-8ca76028cff3/OMyMakeroot	2017-11-22 14:19:32.461902772 +0000
@@ -133,7 +133,7 @@
 OCamlMkLibC(name, files, ldflags) =
   protected.COBJS=$(addsuffix .o, $(files))
   dll$(name).so lib$(name).a: $(COBJS)
-    $(OCAMLMKLIB) -o $(name) $(LDFLAGS) $(ldflags) $(COBJS)
+    $(OCAMLMKLIB) -g -o $(name) $(LDFLAGS) $(ldflags) $(COBJS)
   return $(array dll$(name).so, lib$(name).a)
 
 # If ocamlmklib does not work for you, you can do: