Re: writing backend extensions using Visual Studio

[Greg Landrum <greg(dot)landrum(at)gmail(dot)com>]

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.

-greg