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Errors when compiling C++ file using legacy_code and Microsoft Visual C++ 2017

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Pan Zhao
Pan Zhao 2021-8-18
编辑： Pan Zhao 2021-8-21
I am following the steps explained here to integrate a C++ function into my simulink file. I was able to successfully run
legacy_code('sfcn_cmex_generate', def);
to create the C S-function file. However, when I tried to run
legacy_code('compile', def);
I got the following syntax errors related to cstdlib and cmath
C:\Program Files (x86)\Microsoft Visual
Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cstdlib(11): error C2061: syntax error: identifier
'noexcept'
C:\Program Files (x86)\Microsoft Visual
Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cstdlib(11): error C2059: syntax error: ';'
C:\Program Files (x86)\Microsoft Visual
Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cstdlib(12): error C2449: found '{' at file scope
(missing function header?)
C:\Program Files (x86)\Microsoft Visual
Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cstdlib(14): error C2059: syntax error: '}'
C:\Program Files (x86)\Microsoft Visual
Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cstdlib(21): error C2061: syntax error: identifier
'noexcept'
C:\Program Files (x86)\Microsoft Visual
Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cstdlib(21): error C2059: syntax error: ';'
C:\Program Files (x86)\Microsoft Visual
Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cstdlib(22): error C2449: found '{' at file scope
(missing function header?)
C:\Program Files (x86)\Microsoft Visual
Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cstdlib(24): error C2059: syntax error: '}'
C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cmath(9):
error C2061: syntax error: identifier 'noexcept'
C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cmath(9):
error C2059: syntax error: ';'
C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cmath(10):
error C2449: found '{' at file scope (missing function header?)
C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cmath(15):
error C2059: syntax error: '}'
C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cmath(22):
error C2061: syntax error: identifier 'noexcept'
C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cmath(22):
error C2059: syntax error: ';'
C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cmath(23):
error C2449: found '{' at file scope (missing function header?)
C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cmath(25):
error C2059: syntax error: '}'
C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cmath(32):
error C2061: syntax error: identifier 'noexcept'
C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\cmath(32):
Can anybody help me fix these errors? Thank you very much.
  2 个评论
Ben McMahon
Ben McMahon 2021-8-20
I do not the the specifics of this, as I have never used the legacy code functionality. However I have got similar errors when trying to include C++ files into C code using the embedded coder in Simulink. I would suggest as a starting point try ensuring the coder is set to C++.
From looking at the documentation it seems this can be done in the legacy coder tool using:
def = legacy_code('initialize');
def.Options.language = 'C++';
However this may not be the issue at all. Be intrested to know how you get on.
Pan Zhao
Pan Zhao 2021-8-21
编辑：Pan Zhao 2021-8-21
@Ben McMahonThanks very much for your insights. Following your suggestions, I did resolve the errors mentioned above. Some other errors came out, which I believe are not related to compiling. I have explained the new errors in another post: https://www.mathworks.com/matlabcentral/answers/1437819-errors-with-using-legacy_code-to-integrate-c-codes-generated-from-deep-learning-toolbox-using-mkl

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