Is it possible for a Dev-CPP application to link a .lib file produced by
MSVC++ or Digital Visual Fortran? If not, could Dev-CPP link with DLL
created by g77?
I sent a note to comp.lang.fortran (see bottom of message) and got the
suggestion below by Jugoslav Dujic to check whether Dev-CPP and DVF could be
made binary-compatible.
Thanks for your help!
- Steve Kramer
From Jugoslav:
__________________________________________
It seems you followed a correct procedure... for linking with Visual C++.
I suspect the problem is that you're using Dev-C++, and I don't know
if it's link-compatible with MSVC++/CVF. Based on the info from web site
you provided, it seems not (it says that its compiler is Mingw port of
gcc).
You'd be probably better off asking this in a Devcpp/mingw/gcc specific
group. The issue is the same as how to call a dll written in VC++ from
that environment (as CVF .dlls and .libs are the same as VC++ looking
from outside).
--
Jugoslav
___________________________________________________
----Original Message Follows----
From: pos...@go...
Reply-To: pos...@go...
To: dr_...@ho...
Subject: Trouble linking FORTRAN DLL with C++ application (undefined
reference)
Date: Tue, 27 Jan 2004 17:16:07 -0800
From: dr_...@ho... (Steve Kramer)
Newsgroups: comp.lang.fortran
Subject: Trouble linking FORTRAN DLL with C++ application (undefined
reference)
NNTP-Posting-Host: 24.206.121.222
Message-ID: <538...@po...>
I created a FORTRAN DLL with Digital Visual Fortran 6.0 and have been
able to access that DLL successfully from a calling application in
FORTRAN.
I'm now trying to call the same FORTRAN DLL from C++ and am having
trouble with the getting the calling conventions right. I have
reviewed some relevant articles in comp.lang.fortran and in the Intel
developer forum, including these:
http://groups.google.com/groups?selm=68rm8a%249ej%40usenet.pa.dec.com&oe=UTF-8&output=gplain
http://groups.google.com/groups?selm=9prq7m%24kef4q%241%40ID-106075.news.dfncis.de&oe=UTF-8&output=gplain
http://softwareforums.intel.com/ids/board/message?board.id=15&message.id=739
Based on those and other articles, here's how I set things up.
(1) FORTRAN DLL source code:
Subroutine FORTRANINIT(int1,int2)
!
!
!DEC$ ATTRIBUTES DLLEXPORT::FORTRANINIT
!DEC$ ATTRIBUTES ALIAS : "_FORTRANINIT@8" :: FORTRANINIT
INTEGER*4 int1, int2
(2) Calling C++ program source code:
extern "C"
{
__declspec(dllimport) void __stdcall FORTRANINIT(int* int1,
int* int2);
}
void main()
{
int int1, int2;
<snip>
FORTRANINIT(&int1, &int1);
}
(3) Building/compiling:
(a) I built FORTRANINIT.dll first (in DVF 6.0) and copied it to the
C++ application's directory.
(b) I added the FORTRANINIT.lib file to the C++ project in Bloodshed
Dev-C++ 4.0 (from www.bloodshed.net/devcpp.html) and compiled the
calling C++ application.
(c) There were no compilation errors, but there was a linker error:
undefined reference to `_imp__FORTRANINIT@8'
Any ideas as to what I'm missing here? I would like to be able to
call the same FORTRAN DLL from FORTRAN and C++. I have tried
omitting both the FORTRAN ALIAS as well as the __declspec(dllimport)
in C++ without any luck.
Thanks in advance for the help!
- Steve Kramer
_________________________________________________________________
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