[Omake] Changing OCAMLPACKS in a section fails

[Renald Buter]

On Thursday 15 February 2007, Aleksey Nogin wrote:
Thanks again, Aleksey. It now works beautifully.

> Ah, I see.
>
> Note that OCamlProgram only specifies the _linking_ step, not the
> compilation step (it has to be that way, otherwise we'd end with
> incompatible specifications where in the above example the compilation
> of main_target would be specified to both use and not use oUnit).
>

I see. Since I have quite a java background and worked extensively with ant, 
with its extensive use of sections, my neurons were probably wrongly prewired 
for coming back to make-like building specification...

> By default, the compilation for OCaml files is done via implicit rules
> and, again by default, implicit rules are instantiated using the values
> at the _end_ of the corresponding OMakefile (more precisely - at the end
> of the corresponding .SUBDIRS body).
>
> If you want to force instantiation of implicit rules for a target to be
> "pinned" to a specific variable scope, you need to specify an empty
> dependency for it. E.g:
>
> section
> 	PROGRAM = main_target_test
> 	FILES = main_target main_target_test
> 	OCAMLPACKS = oUnit
>          $(addprefix main_target_test, .cmx .cmi $(EXT_OBJ)):
> 	.DEFAULT: $(OCamlProgram $(PROGRAM), $(FILES))

Ah.

I think I need to go read the paper, now...:)

Now, given the fact that the thing I do here is, seemingly, far from default, 
do you (or anybody else on this list), have any suggestion on how to specify 
this more properly? That is: specifying the compilation and linking of a 
target and its unit test in the same OMakefile?

Thanks for all the help!

Renald

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