On 23 févr. 2011, at 15:19, David Allsopp wrote:

It certainly is an invaluable platform debugging aid! ocamlmklib also supports it - perhaps using it with the command which generates the library may help further?

Duh, I should have thought of this!

The problem does not seem to come from gl_stubs:

[:)][top] % ocamlmklib -verbose -oc gl_stubs gl.wrap.o -framework OpenGL
+ gcc -bundle -flat_namespace -undefined suppress -read_only_relocs suppress -o ./dllgl_stubs.so gl.wrap.o -L/Users/schmitta/godi/lib -framework OpenGL
ld: warning: -read_only_relocs cannot be used with x86_64
+ ar rc ./libgl_stubs.a gl.wrap.o; ranlib ./libgl_stubs.a

but from GL.cmxa:

[:)][top] % ocamlmklib -verbose -o GL GL.cmx -framework OpenGL -lgl_stubs

+ /Users/schmitta/godi/bin/ocamlopt -a -o GL.cmxa GL.cmx -cclib -lGL -ccopt -L/Users/schmitta/godi/lib -ccopt -framework -ccopt OpenGL -cclib -lgl_stubs

I don't understand why ocamlmklib adds the "-lGL" here. (It does the same thing with the Glut archive.)

Is this a bug?

Could this be related to this warning:
ld: warning: -read_only_relocs cannot be used with x86_64 ?

http://caml.inria.fr/mantis/view.php?id=4863 (see the notes, not the bug report)