Re: 7.5 beta version - Mailing list pgsql-hackers

From Bruce Momjian
Subject Re: 7.5 beta version
Date
Msg-id 200404060138.i361cDC21252@candle.pha.pa.us
Whole thread Raw
In response to 7.5 beta version  ("Dann Corbit" <DCorbit@connx.com>)
Responses Re: 7.5 beta version  ("Jeroen T. Vermeulen" <jtv@xs4all.nl>)
List pgsql-hackers
I don't think you can mix libs/binaries from different compilers.

---------------------------------------------------------------------------

Dann Corbit wrote:
> I am having some trouble interfacing the 7.5 server built with MINGW
> with tools generated using other compilers.
> 
> I suspect that the issue is one of default structure packing.  In the
> old version we were using, we built PostgreSQL using Intel C++ or MS
> VC++ and the same for the libpq and other interfaces.
> 
> Now that I have built the server and associated tools with Mingw and a
> version of the interface system with MS VC++ and Intel C++, I have
> problems using (for instance) libpq.
> 
> Some character strings returned early in the struct are fine, but the
> numeric fields occurring later are garbled.
> 
> Now, this issue seems like it must have happened before, since the
> server might be generated on some 64 bit platform and the interface
> library on some other platform.
> 
> In particular, this function:
> 
> char *PQgetvalue(const PGresult *res, int tup_num, int field_num)
> {
>     if (!check_tuple_field_number(res, tup_num, field_num))
>         return NULL;
>     return res->tuples[tup_num][field_num].value;
> }
> 
> Seems to return nonsense when I get to pointers to non-character data.
> 
> Any thoughts?
> 
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--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
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