Matlab coder unable to compile MEX function with MinGW64 Compiler

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Marco Montanaro 2022-7-1

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1751785-matlab-coder-unable-to-compile-mex-function-with-mingw64-compiler

编辑： Marco Montanaro 2022-7-1

Hello, I am trying to compile a Mex function for a model I've created, but for some reason despite updating, configuring and managing the MinGW compiler for Matlab, I cannot seem to get it working properly anymore.

I start up Matlab Codegen, run through the requested steps, but Matlab keeps failing at the "Check for Run-Time Issues" part when it has to generate a Mex. More specifically this is the error I get:

[291/291] C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mingw_w64.instrset\bin\gcc @SDM_main_mex.mexw64.rsp -m64 -Wl,--no-undefined -shared -static -L"C:\Program Files\MATLAB\R2020b\extern\lib\win64\mingw64" -llibmx -llibmex -llibmat -lm -llibmwlapack -llibmwblas -o "SDM_main_mex.mexw64" -llibemlrt -llibcovrt -llibut -llibmwmathutil "C:/Users/marco/Dropbox/RFI - SDM Marco/SDM/Modelli\BaseSw.lib" "ws2_32.lib" "C:/Users/marco/Dropbox/RFI - SDM Marco/SDM/Modelli\CFM.lib" "C:/Users/marco/Dropbox/RFI - SDM Marco/SDM/Modelli\SFM.lib" -Wl,--version-script,SDM_main_mex.map
FAILED: SDM_main_mex.mexw64 
C:\ProgramData\MATLAB\SupportPackages\R2020b\3P.instrset\mingw_w64.instrset\bin\gcc @SDM_main_mex.mexw64.rsp -m64 -Wl,--no-undefined -shared -static -L"C:\Program Files\MATLAB\R2020b\extern\lib\win64\mingw64" -llibmx -llibmex -llibmat -lm -llibmwlapack -llibmwblas -o "SDM_main_mex.mexw64" -llibemlrt -llibcovrt -llibut -llibmwmathutil "C:/Users/marco/Dropbox/RFI - SDM Marco/SDM/Modelli\BaseSw.lib" "ws2_32.lib" "C:/Users/marco/Dropbox/RFI - SDM Marco/SDM/Modelli\CFM.lib" "C:/Users/marco/Dropbox/RFI - SDM Marco/SDM/Modelli\SFM.lib" -Wl,--version-script,SDM_main_mex.map
gcc: error: ws2_32.lib: No such file or directory
ninja: build stopped: subcommand failed.

I have tried running it on both R2020b and R2021b, I've followed the steps present in https://www.mathworks.com/matlabcentral/answers/313298-i-already-have-mingw-on-my-computer-how-do-i-configure-it-to-work-with-matlab as well to no avail. I don't really get why it suddenly refuses to cooperate anymore, as I was previously able to generate Mex functions no problem.

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Walter Roberson 2022-7-1

You need VS2019 instead of VS2022

Marco Montanaro 2022-7-1

编辑：Marco Montanaro 2022-7-1

Worked like a cinch! I should also add to this though that the issue seems to be something that also relates to Matlab R2021b. Running Codegen with Matlab R2020b + VisualStudio 2019 fixed it! Thanks!

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