Mingw not working for C++ compilation

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Darshna
Darshna 2025-5-15
评论： Hitesh 2025-6-2
Hi,
I have installed mingw from add-ons in MATLAB2022b,
when i run command: mex -setup C --> MATLAB detects mingw
but when i run command: mex -setup C++ --> MATLAB is unable to locate it.
version : MinGW-W64-builds-4.3.0

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回答（1 个）

Hitesh
Hitesh 2025-5-16
编辑：Hitesh 2025-5-16
Hi Darshna,
Since you already appeared to have an existing installation of the MinGW Support Package, it is much easier if you just edit the system environment variable MW_MINGW64_LOC in the Windows settings (with the help of an admin) to have this value:
C:\Program Files\mingw-w64\x86_64-6.3.0-posix-seh-rt_v5-rev2\mingw64
(which is where the MinGW compiler shipped with the support package resides).
Then, restart MATLAB.
For more information regarding this issue, kindly refer to the following MATLAB Answer:
https://www.mathworks.com/matlabcentral/answers/313298-i-already-have-mingw-on-my-computer-how-do-i-configure-it-to-work-with-matlab
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Darshna
Darshna 2025-5-16
Hi Hitesh,
Thanks for responding.
I am able to run mingwdir = getenv ('MW_MINGW64_LOC')
So I have followed below sequence: first I uninstalled mingw and run
  1. mex -setup
  2. getenv ('MW_MINGW64_LOC')
  3. rehash toolboxcache
Then i installed mingw from add-ons and again run commands:
  1. mex -setup
  2. getenv ('MW_MINGW64_LOC')
  3. rehash toolboxcache
  4. mex --setup C++
MATLAB could't find compiler for cpp.
Is there any possibility of the rights because I opened MATLAB with different user id?
Hitesh
Hitesh 2025-6-2
Hi Darshna,
I think this might be best handled with MathWorks tech support. Could you submit a technical support request?

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