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I want to use the AES algorithm with MPI.
I code in visual c++. When I compile the code I get this error:
unresolved external symbol "void __cdecl BTM(int,int)" (?BTM@@YAXHH@Z) referenced in function _main
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__cdecl is the default calling convention for C and C++ programs. Because the stack is cleaned up by the caller, it can do vararg functions. The __cdecl calling convention creates larger executables than __stdcall, because it requires each function call to include stack cleanup code.
The cdecl (C Declaration) calling convention is usually the default calling convention for x86 C compilers.
The __stdcall calling convention is used to call Win32 API functions. The callee cleans the stack, so the compiler makes vararg functions __cdecl . Functions that use this calling convention require a function prototype. The __stdcall modifier is Microsoft-specific.
The __fastcall calling convention specifies that arguments to functions are to be passed in registers, when possible. This calling convention only applies to the x86 architecture.
__cdecl is a calling convention, but the problem you have is a linker failure. It is stating that a definition for the function called BTM() cannot be located.
Ensure you are linking with all the necessary .libs.
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