User`s guide

%#external
7-5
7%#external
Purpose Pragma to call arbitrary C/C++ functions from your M-code
Syntax %#external
Description The %#external pragma informs the Compiler that the implementation
version of the function (
Mf) will be hand written and will not be generated from
the M-code. This pragma affects only the single function in which it appears,
and any M-function may contain this pragma (local, global, private, or method).
When using this pragma, the Compiler will generate an additional header file
called
file_external.h or file_external.hpp, where file is the name of the
initial M-file containing the
%#external pragma. This header file will contain
the
extern declaration of the function that the user must provide. This function
must conform to the same interface as the Compiler-generated code. For more
information on the
%#external pragma, see “Interfacing M-Code to C/C++
Code” on page 5-46.