Re: [GENERAL] Building tds_fdw Extension for Windows 64bit

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От Laurenz Albe
Тема Re: [GENERAL] Building tds_fdw Extension for Windows 64bit
Дата
Msg-id 1509609905.3268.3.camel@cybertec.at
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Ответ на [GENERAL] Building tds_fdw Extension for Windows 64bit  ("Igal @ Lucee.org" <igal@lucee.org>)
Ответы Re: [GENERAL] Building tds_fdw Extension for Windows 64bit  ("Igal @ Lucee.org" <igal@lucee.org>)
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Igal @ Lucee.org wrote:
> After reading Craig's excellent blog post at
https://blog.2ndquadrant.com/compiling-postgresql-extensions-visual-studio-windows/I decided to try and build a real
extension- tds_fdw.
 
> I've set it up in Visual Studio Community 2017, but am getting the following errors:
> Error    C2375    'tds_fdw_handler': redefinition; different linkage    tds_fdw   
E:\Workspace\git\tds_fdw\src\tds_fdw.c   118    
 
> Error    C2375    'tds_fdw_validator': redefinition; different linkage    tds_fdw   
E:\Workspace\git\tds_fdw\src\tds_fdw.c   156    
 
> Full output:
> 1>------ Rebuild All started: Project: tds_fdw, Configuration: Release x64 ------
> 1>deparse.c
> 1>options.c
> 1>tds_fdw.c
> 1>src\tds_fdw.c(118): error C2375: 'tds_fdw_handler': redefinition; different linkage
> 1>E:\Workspace\git\tds_fdw\include\tds_fdw.h(130): note: see declaration of 'tds_fdw_handler'
> 1>src\tds_fdw.c(156): error C2375: 'tds_fdw_validator': redefinition; different linkage
> 1>E:\Workspace\git\tds_fdw\include\tds_fdw.h(131): note: see declaration of 'tds_fdw_validator'
> 1>Generating Code...
> 1>Done building project "tds_fdw.vcxproj" -- FAILED.
> ========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========
> I'm not sure if it's related, but the FreeTDS version that I found for Windows is marked as 32bit and I am trying to
buildfor 64bit.
 
> I believe that extensions like tds_fdw and pgloader will help users on TDS databases to migrate to Postgres and will
improveadoption of the project.  I will be more than happy to publish my binaries of the extension if I ever get that
far.
> Can anyone help?

Based on my experience with oracle_fdw, I would change the function declaration
in tds_fdw.h to
  extern PGDLLEXPORT Datum tds_fdw_handler(PG_FUNCTION_ARGS);

Yours,
Laurenz Albe


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