matlab C api 사용시 mclmcrInitialize_proxy 에러가 발생할 때.
Technical Solutions
Why do I receive a linking error about
mclInitializeApplication_proxy and mclmcrInitialize_proxy when I compile
my driver application that calls a C++ shared library compiled using
MATLAB Compiler 4.10 (R2009a)?
Date Last Modified: Thursday, July 30, 2009
| Solution ID: | 1-AB2V2G | |
| Product: | MATLAB Compiler |
|
| Reported in Release: | R2009a | |
| Platform: | All Platforms | |
| Operating System: | All OS |
Subject:
Why do I receive a linking error about
mclInitializeApplication_proxy and mclmcrInitialize_proxy when I compile
my driver application that calls a C++ shared library compiled using
MATLAB Compiler 4.10 (R2009a)?
Problem Description:
I have written a MATLAB function called mytest.m that is defined
as follows:
function result = mytest(V)
result = sum(sum(V));
end
I am compiling this into a DLL using the MCC command using MATLAB
Compiler 4.10 (R2009a) as follows:
mcc -W cpplib:Test -T link:lib mytest.m -v
Then I write a driver application called mydriver.cpp (see below), which
when compiled with the following command
mbuild mydriver.cpp Test.lib
gives me the error:
mydriver.cpp(7) : error C3861: ‘mclInitializeApplication_proxy’:
identifier not found
mydriver.cpp(51) : error C3861:
‘mclmcrInitialize_proxy’: identifier not found
C:\PROGRA~1\MATLAB\R2009A\BIN\MEX.PL: Error: Compile of ‘mydriver.cpp’
failed.
However, when I compile the same application using MATLAB Compiler
4.7 (R2007b), the compilation completes successfully.
Solution:
This error may occur only with MATLAB Compiler 4.8 (R2008a) or
later versions because of changes that have been introduced in
mclmcrrt.h and mclmcr.h, which impose the requirement that mclmcr.h
always be included after mclmcrrt.h for the pre-processing stage.
In
the attached driver application, the following code is found on Lines
1-2:
#include "mclcppclass.h"
#include "Test.h"
Here, mclcppclass.h (found in the <matlabroot>/extern/include
directory) in turn includes mclmcr.h.
Also, in the generated
Test.h file, the following code can be found:
#include "mclmcrrt.h"
#include "mclcppclass.h"
This results in mclcppclass.h being included before mclmcrrt.h, thus
causing a symbol resolution issue for the identifiers
mclInitializeApplication_proxy and mclmcrInitialize_proxy.
In
order to resolve this issue, change the order of the header files in
mydriver.cpp to the following:
#include "Test.h"
#include "mclcppclass.h"
Also, since Test.h already includes mclcppclass.h, you can entirely
avoid including this header file in your driver application.