Failed to download MinGW 6.3.0 for 2020a MATLAB

I am trying to download MinGW 6.3.0 for MATLAB v2020a from Add-on Manager and I get this error:

Failed to download the third-party software:

• MinGW 6.3.0 from MinGW-w64.org

This is required by:

• MATLAB Support for MinGW-w64 C/C++ Compiler

To resolve this issue, see this MATLAB Answer.

How can I solve this problem?

Answer 1

[Chidvi Modala]

This is a known issue. Our developers are aware about it and will try to fix it in future releases.

You can use the following way to install MinGW until this gets fixed:

1. Download MinGW 6.3:

https://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win64/Personal%20Builds/mingw-builds/6.3.0/threads-posix/seh/x86_64-6.3.0-release-posix-seh-rt_v5-rev2.7z

2. Extract the ZIP-file in an empty directory. Ensure that there are no spaces in the path, for example: C:\MinGW-64

3. Create the environment variable MW_MINGW64_LOC like you can find here: http://www.mathworks.com/matlabcentral/answers/223482), which points to the path mentioned in 2, for example.:

MW_MINGW64_LOC=C:\MinGW-64

4. Restart MATLAB and then call 'mex -setup' in MATLAB in order to check and configure MinGW. The output should show something like: "MEX configured to use 'MinGW64 Compiler (C)'...".

[DX Li]

Great! It works

[Ashfaque]

Hi,

It seems that mingw v6.3 no longer exists. If you have the zip file, could you please provide it for me to use with Matlab 2020a?

[Walter Roberson]

@Ashfaque

https://sourceforge.net/projects/mingwbundle/files/GCC%206.3.0/ possibly ?

[Ashfaque]

@Walter Roberson, thank you for your answer. After posting I stumbled across this page (MATLAB Support for MinGW-w64 C/C++/Fortran Compiler - File Exchange - MATLAB Central) and it helped sort one problem.

The new problem I have is how to have two different environment variables in in windows so that two different matlab versions can point to two different minGW versions. I have Matlab 2020a and 2024b and would like to use mingw 6.3 and 8.1 respectively

[Walter Roberson]

@Ashfaque

I believe that you can edit the code associated with each shortcut icon; you would put in different MW_MINGW64_LOC settings. You might possibly need to change the Target setting to a batch file that set the environment variable and then started the executable.

[Ashfaque]

Sounds like that would be the same as having different startup scripts set for each version of Matlab?