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problems with dll library
Posted:
Jan 11, 2013 10:23 PM


Hi,
I have proble which I can not solve for a long time...
I use MinGW compiler to generate dll library  I use a following command to compile a code:
gcc Wall shared libraryX.c o libraryX.dll
in the libraryX.c I put a simple function:
double signX( double x ) { double s = 0.0; /*Funtion body*/ if( x > 0.0) s = 1.0; if( x < 0.0) s = 1.0; return(s); }
When I am trying to use this function in Mathematica with a command:
Needs["NETLink`"] signX = DefineDLLFunction["signX", "libraryX.dll", "double", {"double"}]; signX[1.0]
I get a following error:
NET::netexcptn: "A .NET exception occurred: \!\(\"System.BadImageFormatException: Probowano zaladowac program w niepoprawnym formacie. (Wyj\\:0105tek od HRESULT: 0x8007000B)\\n w Wolfram.NETLink.DynamicDLLNamespace.DLLWrapper16.signX(Double )
Does anybody know how to load such simple funtion in mathematica?
I would be garteful for some hints.
Regards,
Piotr



