Re :Problem with Compiling C function - Mailing list pgsql-cygwin

From Maciej Grygorcewicz
Subject Re :Problem with Compiling C function
Date
Msg-id e57e8a580801141426l5df33720h31091a250e35b4af@mail.gmail.com
Whole thread Raw
Responses Re: Re :Problem with Compiling C function  ("Reini Urban" <rurban@x-ray.at>)
List pgsql-cygwin
2008/1/9, Maciej Grygorcewicz :
>> But linker threw such errors:
> >"
>>  Unresolved External: _pgwin32_fopen referended from .... // and so on
>  >Unresolved External: _pg_sprintfl referended from .... // and so on "
>>
>> Why???? I have included postgres.h , and all other required files .

>-lpgport is needed.

Thanks for the response. But I have few questions
Is this a compiler / linker switch . Can I turn it on on Builder . or have I to use gcc or g++??

> I tried to build almost the same code but in C++ style DLL.
> DLL file was created succesfully , but on the other hand postgreSQL couldn't
> find exported function...
> DLL was in non-undernstadable format for postgresql.

>for c++ you have to wrap the postgresql functions into extern "C".
Yes , I am wrapping exported functions in extern "C" . But it doesn't work.
Maybe I have to wrapp all functions , but this is  never ending work - I have in project many files from Jpeglib library...
--
Pozdrawiam

Maciej Grygorcewicz
maciekgrygorcewicz@gmail.com ,
prometeusz1@o2.pl
GG 1638280

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