swi-prolog: building 64-bit

[Ryan Schmidt]

On Oct 23, 2009, at 06:49, Uldis Bojars wrote:

> Is it possible to build a 64-bit version of the swi-prolog (on Mac  
> OS X 10.5)?
>
> If yes, could you please advise me how to do that?
>
> The problem I am trying to solve is related to JPL, included as a part
> of swi-prolog. When it comes to using SWI-Prolog from Java 6 (via
> jpl.jar), Leopard only has a 64-bit version of JVM and it is not
> possible to load 32-bit libjpl.dylib (built by default) into 64-bit
> Java.

The general instructions for building any port 64-bit are to set  
build_arch to x86_64 in macports.conf (on Intel; on PowerPC, it would  
be ppc64). I do not know if swi-prolog supports building 64-bit on  
Leopard or at all.