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Re: writing backend extensions using Visual

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: Greg Landrum <greg(dot)landrum(at)gmail(dot)com>
Cc: pgsql-hackers-win32(at)postgresql(dot)org
Subject: Re: writing backend extensions using Visual
Date: 2005-03-26 16:25:27
Message-ID: 42458CF7.2050606@dunslane.net (view raw or flat)
Thread:
Lists: pgsql-hackers-win32

Greg Landrum wrote:

>On Fri, 25 Mar 2005 17:57:07 -0500, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>  
>
>>Greg Landrum <greg(dot)landrum(at)gmail(dot)com> writes:
>>    
>>
>>>After playing around for a while, I managed to get a DLL to build and
>>>work at least far enough that I can CREATE and call the functions from
>>>psql.  However, it looks like every argument I pass into the functions
>>>comes in as null (e.g. PG_ARGISNULL returns true). This clearly is
>>>less than helpful. :-)
>>>      
>>>
>>Sounds like MSVC is interpreting the layout of the FunctionCallInfo
>>struct differently than the MinGW compiler did.  You should probably
>>look into whether there are "pragma pack" directives lurking in your
>>program.  ("pragma pack" is evil...)
>>    
>>
>
>I've got the library stripped down to the bare minimum (just a couple
>of demo functions) and I can't seem to find any uses of pragma pack,
>so I don't think that's it.
>
>
>  
>

Do we actually support building backend extensions with anything other 
than our standard build environment? I know we support building libpq 
using MSVC, but that is for client use. I'm not even mildly surprised 
that building a backend extension with MSVC breaks.

cheers

andrew

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