installed compiler not found

Firstly, make sure that you have installed the complete version of the MinGW compiler from the add-on section of MATLAB, as custom installations of MinGW compiler may not be compatible with MATLAB.

If this issues still persists and is only occurring after restarting MATLAB, here is a workaround.

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Raphael 2020-11-12

Hi Aghamarsh

I am not sure what you mean by complete vs. custom installation of the compiler. There was no such option in the Add-On Explorer. I simply clicked on Download and installed it

I ran mex -setpup -v as suggested in the workaround and got this:

.. Looking for compiler 'MinGW64 Compiler (C)' ...

... Looking for environment variable 'MW_MINGW64_LOC' ...Yes ('C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mingw_w64.instrset').

... Looking for file 'C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mingw_w64.instrset\bin\gcc.exe' ...Yes.

... Looking for folder 'C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mingw_w64.instrset' ...Yes.

Found installed compiler 'MinGW64 Compiler (C)'.

Then I ran mex -setup C++ -v and got this

... Looking for compiler 'MinGW64 Compiler (C++)' ...

... Looking for environment variable 'MW_MINGW64_LOC' ...Yes ('C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mingw_w64.instrset').

... Looking for file 'C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mingw_w64.instrset\bin\g++.exe' ...Yes.

... Looking for folder 'C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mingw_w64.instrset' ...Yes.

... Looking for environment variable 'MW_MINGW64_LOC' ...Yes ('C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mingw_w64.instrset').

... Executing command 'C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mingw_w64.instrset\bin\g++ -dumpmachine' ...No.

Did not find installed compiler 'MinGW64 Compiler (C++)'.

So the problem doesn't seem the environment variable but something else

Raphael 2020-11-15

The MinGW installer folder was not added to the windows path and I can not add it manually (got a message error when I tried. Aslo, notcie that this location is hidden and the folder doesn't appear in the list when trying to add it to the path via the interface. But even when I did try to add it manually by writing the whole path I got an error message and could save the new path)

I also tried to run the command you suggested but got error messages:

C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mingw_w64.instrset\bin\g++ --version

↑

Error: Invalid use of operator.

>> C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mingw_w64.instrset\bin\g++ -dumpmachine

C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mingw_w64.instrset\bin\g++ -dumpmachine

↑

Error: Invalid use of operator.

>> mex -setup cpp

Error using mex

No supported compiler was found. You can install the freely available MinGW-w64 C/C++ compiler; see Install MinGW-w64 Compiler. For more options, visit

Walter Roberson 2024-3-7

@Shashwat Singh

You can download from the File Exchange https://www.mathworks.com/matlabcentral/fileexchange/

Shashwat Singh 2024-3-7

编辑：Shashwat Singh 2024-3-7

Hi @Walter Roberson , first of all thanks for the quick reply.....when i am going to above link which you have mentioned, then it is downloading "mingw.mlpkginstall" and when i am double clicking on it then it is giving me below error...

Connection Error

The application could not connect to MathWorks. For more information on resolving this issue, see this Support Article.

Please help if you know the resolution

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Answer 2

Raphael 2020-11-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/637385-installed-compiler-not-found#answer_545138

Oops. But now I am getting 'c:\ProgramData\...full_path ...\g++' is not recognized as an internal or external command, operable program or batch file

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Raphael 2020-11-16

Here is the output:

C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mingw_w64.instrset\bin>.\g++.exe --version

g++.exe (x86_64-posix-seh-rev2, Built by MinGW-W64 project) 6.3.0

This is free software; see the source for copying conditions. There is NO

warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mingw_w64.instrset\bin>.\g++.exe -dumpmachine

x86_64-w64-mingw32

C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mingw_w64.instrset\bin>mex -setup cpp

No supported compiler was found. You can install the freely available MinGW-w64 C/C++ compiler; visit https://www.mathworks.com/help/matlab/matlab_external/install-mingw-support-package.html. For more options, visit https://www.mathworks.com/support/compilers.

Aghamarsh Varanasi 2020-11-16

Hi Raphael,

I understand that you have installed MinGW support package for MATLAB, but are not able to setup mex.

The outputs that you for the commands also suggest the same. As I am not able to reproduce the same at my end, I suggest you contact MathWorks support to resolve the issue.

www.mathworks.com/support/contact_us

Thanks

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