Re: error LNK2001: unresolved external symbol

From:
Simply_Red <Simply.Red75@gmail.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Mon, 3 Mar 2008 07:15:12 -0800 (PST)
Message-ID:
<fe5f711a-1c0b-4c3f-b6b9-f30a8494b179@s8g2000prg.googlegroups.com>
On 29 f=E9v, 12:06, "Tom Serface" <tom.nos...@camaswood.com> wrote:

Here are some links to similar conversations that may lead you to a
solution:

http://www.thescripts.com/forum/thread280324.htmlhttp://softwarecommunity.=

intel.com/isn/Community/en-US/forums/post/30...http://msdn2.microsoft.com/en=
-us/library/k2f5w4h3(VS.80).aspx

Tom

"Simply_Red" <Simply.Re...@gmail.com> wrote in message

news:aa46299a-d3c5-4d5b-8036-f0fefc6fc121@s37g2000prg.googlegroups.com...
On 21 f=E9v, 16:27, Simply_Red <Simply.Re...@gmail.com> wrote:

On 21 f=E9v, 16:21, "AliR \(VC++ MVP\)" <A...@online.nospam> wrote:

Did you put a extern "C" around the function declaration?

this might
help:http://www.physiology.wisc.edu/comp/docs/notes/not017.html

AliR.

"Simply_Red" <Simply.Re...@gmail.com> wrote in message

news:22f06add-320d-498e-8e63-094a45f81bd5@e6g2000prf.googlegroups.com..=

..

HI,
i'm using VC6,

i wrote a DLL in fortran using silverfrost ftn95, and i try tu use i=

t

in my VC6 project (also a DLL),

i added the lib file in the link setting of my project, but i got th=

e

message:
error LNK2001: unresolved external symbol

what may be wrong???


yes i put extern "C"


extern "C" double BZ_Y(Points* bz,double x);

void test()
{
Points* bz = new Points[4];
double x = 0.1;
x = BZ_Y(bz,x);

}

please if someone has a suggestion, about the problem!!!


thanks, your links help me and now i have just one link error:

Inter29.obj : error LNK2001: unresolved external symbol __imp__BZ_Y@12

code in C++:

extern "C" double __declspec(dllimport) __stdcall BZ_Y(Points*
bz,double x);

void test()
{
   Points* bz = new Points[4];
   double x = 0.1;
   x = BZ_Y(bz,x);
}

i tried to put in Fortran:

  double precision function Bz_Y(bz, x)
       !DEC$ ATTRIBUTES DLLEXPORT::Bz_Y
       !DEC$ ATTRIBUTES C, ALIAS: 'BZ_Y@12':: Bz_Y
       .....
  end function

but it does not work

it seems that the problem is in how to make the function Bz_Y exported
as BZ_Y@12

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