Re: [Caml-list] OASIS and conditional compilation

[Jacques-Pascal Deplaix <jp.deplaix@gmail.com>]

On 12/15/2012 05:02 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
>     FindlibContainers:    pgocaml
>     Findlibname:          batteries
>     XMETARequires:        unix, calendar, csv, pcre, batteries
>
>   Library "pgocaml_extlib"
>     Build$:               flag(extlib)
>     Install$:             flag(extlib)
>     Path:                 src
>     Modules:              PGOCaml, PGOCaml_generic
>     BuildDepends:         unix, calendar, csv, pcre, extlib, camlp4.macro
>     FindlibContainers:    pgocaml
>     Findlibname:          extlib
>     XMETARequires:        unix, calendar, csv, pcre, extlib
>
> Note that the major difference is that "-ppopt -DUSE_BATTERIES" must be
> passed to Camlp4 only when compiling the Batteries version.  The problem
> is that it's *always* passed, even if the "batteries" flag is disabled
> by passing "--disable-batteries" to the configure script.
>
> Did I misinterpret something crucial about OASIS, or is this indeed a bug?
>
> Thanks in advance!
> Best regards,
> Dario Teixeira
>
> P.S. The full OASIS spec file can be viewed at this location:
>      https://forge.ocamlcore.org/scm/viewvc.php/branches/oasification/_oasis?revision=157&root=pgocaml
>
Hi,

There is already a bug report for this:
https://forge.ocamlcore.org/tracker/index.php?func=detail&aid=1234&group_id=54&atid=291