| Building DLM on Windows 64-bit [message #76249] |
Mon, 23 May 2011 10:10 |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Folks,
After all these years, I thought it was about time I built a DLM
file and called it from IDL. To this end, I've purchased Ronn's
book Calling C and C++ from IDL and I've started in. I installed
Visual Studio 2010 Express and I am trying to build the very
first example in the book, simpleExample. (See snapshot_4.png
below.)
I have a project named simpleExample. This is an empty DLL
project, as described in Ronn's book. I have installed
in the source folder two C programs: IDL_Load.c and
simpleExample.c. I have installed in the header folder
two files: simpleExample.h and export.h. (I had to copy
the latter over from the IDL directory because I could
NOT get VS to find the darn thing! I tried adding it
in the "Include Directories" list for both the VC++
Directories and the C/C++ tabs in the project property
sheet. I tried adding the file name both with and without
quotes around it. All to no avail! See screenshot_1 and
screenshot_2 in the examples below.)
In the Linker Input tab in the project property page,
I have included idl.lib (both with and without quotes, too).
I have also specified the name of a Module Definition File,
simpleExample.def, which is written like this:
LIBRARY simpleExample
DESCRIPTION 'A simple example program'
EXPORTS IDL_Load @1
You can see the Linker Input tab in screenshot_3.png.
When I try to build this project, I get the following errors.
1>------ Build started: Project: simpleExample, Configuration: Debug
Win32 ------
1>C:\IDL\dlm\simpleExample.def(2): warning LNK4017: DESCRIPTION
statement not supported for the target platform; ignored
1> Creating library C:\Users\David\documents\visual studio 2010
\Projects\simpleExample\Debug\simpleExample.lib and object C:\Users
\David\documents\visual studio 2010\Projects\simpleExample\Debug
\simpleExample.exp
1>IDL_Load.obj : error LNK2019: unresolved external symbol
_IDL_SysRtnAdd referenced in function _IDL_Load
1>simpleExample.obj : error LNK2019: unresolved external symbol
_IDL_GettmpLong referenced in function _simpleFunction
1>simpleExample.obj : error LNK2019: unresolved external symbol
_IDL_Message referenced in function _simpleFunction
1>C:\Users\David\documents\visual studio 2010\Projects\simpleExample
\Debug\simpleExample.dll : fatal error LNK1120: 3 unresolved externals
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped
==========
It would appear I am missing an "export" file. Ronn mentions
that this is needed for building on a Windows platform,
but nowhere describes it or tells me how to create it.
(At least in what I have read so far.) Is this what
I need?
I am at wit's end! Can anyone offer a way forward?
http://www.idlcoyote.com/misc/snapshot_1.png
http://www.idlcoyote.com/misc/snapshot_2.png
http://www.idlcoyote.com/misc/snapshot_3.png
Thanks!
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
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