[Omake] individual compilation

[Aleksey Nogin]

On 17.05.2007 07:41, Anastasia Gornostaeva wrote:

> Thanks for your simple answers. My next trouble is now: 
> How to properly write OMakefile that builds casual ocaml library and
> camlp4 preprocessor macro library?
> 
> FILES[] =
>    file1
>    file2
> LIB: mylib
> 
> .DEFAULT: $(OCamlLibrary $(LIB), $(FILES)) $(SomeWhatToBuildPP)
> 
> where "SomeWhatToBuldPP does:
> 
> ocamlfind ocamlc -a -o pa_mypp.cma \
>     -pp 'camlp4o pa_extend.cmo q_MLast.cmo' -package camlp4 \
>      pa_mypp.ml
> 
> (or the same without ocamlfind)

Note that the command line above would do
several things at once:
  - compile pa_mypp.cmo
  - link pa_mypp.cmo into a library

With OMake, you normally specify those two steps separately, using 
something like:

FILES[] =
    file1
    file2

LIB: mylib

.DEFAULT: $(OCamlLibrary $(LIB), $(FILES))

CAMLP4_FILES[] =
    pa_mypp

section
   #These files require camlp4 pre-processing
   OCAMLPPFLAGS += -pp $'camlp4o pa_extend.cmo q_MLast.cmo'
   OCAMLDEPFLAGS += -pp $'camlp4o pa_extend.cmo q_MLast.cmo'

   #Also, include camlp4 package (assumes ocamlfind)
   OCAMLPACKS[] += camlp4

   #"Pin" the following targets to the current variable environment
   $(addsuffixes .cmo .cmx .cmi $(EXT_OBJ), $(CAMLP4_FILES)):

   #Link the pa_mypp library
   .DEFAULT: $(OCamlLibrary pa_mypp, $(CAMLP4_FILES))

Aleksey
-- 
Aleksey Nogin, Research Staff Member
Advanced Technologies Department, Information & System Sciences Lab
HRL Laboratories, LLC, Malibu, CA