64 bit support

[Leonid Spektor]

Paul,

	Yes, by POST I do mean post, postlist, postmodrules, postmortem and posttrain applications. 

	Post database file "post.db" has the same name in all language grammars. Searching lib directory for "post.db" file name could result in finding wrong language database file, if you have more than one grammar installed in lib directory. For that reason POST requires explicit specification of full path to the right language grammar directory on Unix, Mac and PC. MOR application also requires the use of +l option to specify where the correct language grammar is located.

	Because POST database is a binary file for technical reasons it is incompatible with 64 bit application's internal variables declarations. If we make POST app 64 bit and we also support 32 bit app for backward compatibility, then we would have to create with POSTTRAIN and to distribute two different database files, one for 64 bit applications and one for 32 bit applications. This solution seems impractical to me, at least at this time, since in my humble opinion 32 bit POST applications already perform very fast and making them 64 bit should not make them much faster. But, this is more an administrative issue, then technical one, so I'll leave the final word to people in charge.

Leonid.



On Jul 27, 2012, at 12:41, Paul Feitzinger wrote:

> On 2012-07-27, Leonid Spektor wrote:
>> Only POST programs have to be 32 bit. All other CLAN applications
>> can be compiled as 64 bit apps. Just change makefile accordingly.
> 
> Thanks. To be clear, by POST programs you mean post, postlist,
> postmodrules, postmortem and posttrain?
> 
>> I thought all 64 bit systems are downward compatible and also
>> support 32 bit apps.
> 
> I meant to say that post refuses to run after being compiled to a
> 64-bit binary. After compiling with the -m32 flag it works fine,
> except that it can't find post.db in my mor lib. It lives at
> /opt/clan/lib/post.db . In common.h I'm #define-ing DEPDIR to
> /opt/clan/lib/, and mor is able to locate the ar directory there.
> 
>  $ post test.mor.cex
>  cannot open "post.db".
>  ***Please make sure that any file with ".db" in "mor lib" folder is
>     renamed to post.db
>  a workspace has to be created
>  cannot open "post.db".
>  ***Please make sure that any file with ".db" in "mor lib" folder is
>     renamed to post.db
>  error: the file "post.db" cannot be opened
> 
> It works when passing post the full path to post.db with the +d
> switch.
> 
> paul
> 
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