[Omake] OCAMLFIND, OCAMLFINDFLAGS and -predicates

[Kaspar Rohrer]

Hi,

I'm currently trying to set up an environment for OpenGL and Gtk  
programming using Ocaml, Omake and GODI. However, when invoking Omake  
with my OMakefile as shown below, I get the following error somewhere  
along the way:

+ ocamlfind ocamlopt -package unix,lablGL,lablgtk2 -warn-error A -I .  
-o interior.opt interior.cmx fNum.cmx fTest.cmx base.cmx vector2.cmx  
angle.cmx matrix2x2.cmx affineMap2.cmx geom2.cmx vector3.cmx  
quaternion.cmx matrix3x3.cmx affineMap3.cmx geom3.cmx -linkpkg
No implementations provided for the following modules:
   GlGtk referenced from interior.cmx

The problem seems to be that lablgtkgl.cmxa is ignored by ocamlfind  
because the lablGL predicate is not specified. (Take a look at the  
META file below from lablgtk2/ to see what I mean)
Now for the question: Is there a way in Omake to specify predicates  
for `ocamlfind ocamlc / ocamlcp / ocamlopt /  ocamlmktop'? I have  
already tried to set `OCAMLFINDFLAGS = "-predicates lablGL"', but  
then `ocamlfind ocamldep' chokes because it does not accept the `- 
predicates' argument'.

Any ideas how I should resolve this?

Regards
- Kaspar Rohrer

OMakefile:
> .PHONY: clean
>
> # OCAMLFLAGS +=
> # OCAMLCFLAGS   +=
> # OCAMLOPTFLAGS +=
> # OCAML_LINK_FLAGS +=
> # OCAML_BYTE_LINK_FLAGS +=
> # OCAML_NATIVE_LINK_FLAGS +=
>
> USE_OCAMLFIND = true
> # OCAMLFINDFLAGS = -predicates lablGL
>
> if $(not $(OCAMLFIND_EXISTS))
> 	eprintln(This project requires ocamlfind, but is was not found.)
> 	eprintln(You need to install ocamlfind and run "omake --configure".)
> 	exit 1
>
> NATIVE_ENABLED = true
> BYTE_ENABLED = true
>
> OCAMLPACKS[] =
> 	unix
> 	lablGL
> 	lablgtk2
>
> OCAMLFLAGS += "-predicates lablGL"
>
> FILES[] =
> 	interior
> 	base
> 	fTest
> 	fNum
> 	angle
> 	vector2
> 	vector3
> 	quaternion
> 	matrix2x2
> 	matrix3x3
> 	affineMap2
> 	affineMap3
> 	geom2
> 	geom3
>
> PROGRAM = interior
>
> # OCAML_LIBS +=
> # OCAML_CLIBS +=
> # OCAML_OTHER_LIBS += lablgtkgl
> # OCAML_LIB_FLAGS += -I +lablGL -I +lablgtk2
>
> OCamlProgram($(PROGRAM), $(FILES))
>
> .DEFAULT: interior
>
> clean:
> 	rm -f \
> 	$(filter-proper-targets $(glob $(addsuffix .*, $(FILES)))) \
> 	$(PROGRAM).run $(PROGRAM).opt \
> 	*~

lablgtk2/META:
> description = "Bindings for gtk2"
> requires=""
> requires(lablGL)="lablGL"
> version="20051028"
> archive(byte)="lablgtk.cma  lablglade.cma gtkInit.cmo"
> archive(native)="lablgtk.cmxa  lablglade.cmxa gtkInit.cmx"
> archive(byte,lablGL)="lablgtk.cma lablgtkgl.cma  lablglade.cma  
> gtkInit.cmo"
> archive(native,lablGL)="lablgtk.cmxa lablgtkgl.cmxa  lablglade.cmxa  
> gtkInit.cmx"
> archive(byte,mt) += "gtkThread.cmo"
> archive(native,mt) += "gtkThread.cmx"
> archive(byte,lablGL,mt) += "gtkThread.cmo"
> archive(native,lablGL,mt) += "gtkThread.cmx"
> archive(toploop,mt) += "gtkThInit.cmo"