[Omake] How to build camlp4 extension?

[Aleksey Nogin]

Dmitry,

Sorry for the very slow response. By any chance, do you have pa_ba 
listed in the MLFILES (if so, this would probably explain the problem)? 
Is it mentioned in some other places in your OMakefiles?

Aleksey

On 28.11.2006 06:07, Dmitry Bely wrote:

> I have an Ocaml project where both native and bytecode executables are 
> build:
> 
> BYTE_ENABLED = true
> NATIVE_ENABLED = true
> 
> To compile .ml files I need some custom camlp4 syntax extension
> pa_ba.cmo, so I have:
> 
> OCAMLPPFLAGS = -pp "camlp4o -I . pa_ba.cmo"
> OCAMLDEPFLAGS += $(OCAMLPPFLAGS)
> 
> MLFILES = ...
> LIB = ...
> OCamlLibrary($(LIB), $(MLFILES))
> 
> etc. But how to build the syntax extension itself? I tried the following:
> 
> section
>    BYTE_ENABLED = true
>    NATIVE_ENABLED = false
>    OCAMLFLAGS = -I +camlp4
>    OCAMLPPFLAGS = -pp "camlp4o pa_extend.cmo q_MLast.cmo"
>    OCAMLDEPFLAGS = $(OCAMLPPFLAGS)
>    pa_ba.cmo: pa_ba.ml
> 
> .DEFAULT: pa_ba.cmo
> 
> This does not work:
> 
> *** omake:
>   These file are targeted separately, but appear as effects of a single 
> rule.
>   This is likely to lead to unpredictable behavior.
>   targets:
>      debug\Core\pa_ba.obj
>      debug\Core\pa_ba.cmo
> [...]
> - build debug\Core pa_ba.obj
> + ocamlc.opt -warn-error A -g -pp "camlp4o -I . pa_ba.cmo" -I . -c pa_ba.ml
> <W> Grammar extension: in [expr], some rule has been masked
> File "pa_ba.ml", line 6, characters 8-15:
> Unbound quotation: "expr"
> Uncaught exception: Pcaml.Qerror("expr", 0, _)
> Preprocessor error
> 
> Do you know how to correctly write a rule to make pa_ba.cmo from pa_ba.ml?
> 
> - Dmitry Bely
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