Why do I receive a calling convention error when calling a Fortran function from a C S-Function with Simulink?
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I have a legacy Fortran function that I am using from Simulink via a S-Function wrapper. When I debug it using Visual Studio, MSVC gives me the following error about calling conventions.
Debug Error!
The value of ESP was not properly saved across a function call. This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention.
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MathWorks Support Team
2009-6-27
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The error message indicates that there is a calling convention mismatch.
A workaround is to try placing a __stdcall or __fastcall statement (depending on the compiler) between the "extern type" and the function name in the function prototype in the c-file.
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2009-6-27
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