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E2591 Only cdecl functions may use varargs (Object Pascal)

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This error occurs whenever the varargs directive is used with non-cdecl functions.

function test(): Integer; varargs;


To fix this error, you need to declare your function with the external and cdecl directives:

function test(): Integer; varargs; cdecl; external 'externalLibrary.dll'; //This imports functions from a dynamically loadable library.

Note: This only occurs by compiling with the Object Pascal Mobile Compilers (dccios32 or dcciosarm). Otherwise, the code produces E2277 Only external cdecl functions may use varargs (Object Pascal).

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