Re: [Caml-list] OASIS and conditional compilation

["Török Edwin" <edwin+ml-ocaml@etorok.net>]

On 12/15/2012 06:02 PM, Dario Teixeira wrote:
> Hi,
> 
> I've come across a perplexing issue with OASIS.  I'm not sure if this is
> just a bug or if I'm trying to push the tool beyond its design parameters.
> 
> PG'OCaml can be compiled against either Batteries or ExtLib (the latter
> mostly for legacy compatibility). To allow the harmonious coexistence of
> the two options in the same system, the build system should allow for
> the compilation of one or the two versions of the library side by side.
> In OASIS-speak (I'm using version 0.3):
> 
>   Flag "batteries"
>     Description: Link PG'OCaml against Batteries
>     Default: true
> 
>   Flag "extlib"
>     Description: Link PG'OCaml against ExtLib
>     Default: true
> 
>   Library "pgocaml_batteries"
>     Build$:               flag(batteries)
>     Install$:             flag(batteries)
>     Path:                 src
>     Modules:              PGOCaml, PGOCaml_generic
>     BuildDepends:         unix, calendar, csv, pcre, batteries, camlp4.macro
>     ByteOpt+:             -ppopt -DUSE_BATTERIES
>     NativeOpt+:           -ppopt -DUSE_BATTERIES

I think it simply adds these to the tags file, and since its the same module name
in both cases it'll get built with those flags even when batteries is disabled.

--Edwin