Hi,

I am trying to create an external C library with Visual C++ 2005 Express. To test the process I am using the following code:

/ Enum definitions /

/ The Prototypes /
int LIB_FUN1(void);

#include "D:\temp\codesys\TEST_LIB2.h"

/ The implemenation templates /
int LIB_FUN1(void)
{
return 2;
}

I have done configuration of Visual C++ as explained in the document "C_IN_32Bit_E.doc". I had no error during compilation.

I have copied the file TEST_LIB2.obj in the directory of TEST_LIB2.lib, and I have added the library to my Codesys project.

The target of my project is "3S CoDeSys SP PLCWinNT V2.4".

When I tried to compile in Codesys, I had the warning 1902 and was unable to upload my project in PLCWinNT.

I think the problem is in configuration of Visual C++ project because the function LIB_FUN1 is very simple.

Does somebody have any information about such a warning? Is there a more precise explanation about configuration of visual C++ options?

Thank you

Regards

Laurent

Maybe you have solved this problem, but may I help you...

Well, I´ve been trying do the same thing.

Your code in .c has a problem. The return type function was declared as 'int'. This type has 32 bits in the visual c++ and this type in CodeSys may have less bits than 32.

I guess you need to make one specific '#define' to solve it.

For example:

#define INT short

So, you can use 'INT' and not 'int' to build your obj file...