C / C++ Compiler Configuration

Hi guys,

Some troubles configuring Matlab 2018b to compile C or C++ files.

Basics:

I have multiple compilers installed on the computer, ranging from a Visual Studio 2017 to the Ming compiler that you can get from the Add-Ons menu ( all from today )

• For C - the Ming is the only one that is detected, but when trying the official demo, I arrive at this

mex yprime.c
Warning: You are using an unsupported version of MinGW Compiler. To install the supported version of
MinGW compiler, see: Install MinGW-w64 Compiler.
 For a list of currently supported compilers visit https://www.mathworks.com/support/compilers. 
Error using mex
The command 'C:\ProgramData\MATLAB\SupportPackages\R2018b\3P.instrset\mingw_w64.instrset\bin\gcc'
exited with a return value '0'

• For C++ - no compilers are detected, including the Ming one.

The mex -setup -v cpp log:

>> mex -setup -v C++
Verbose mode is on.
... Looking for compiler 'Intel Parallel Studio XE 2015 for C++ with Microsoft Visual Studio 2015' ...
... Looking for environment variable 'ICPP_COMPILER15' ...No.
Did not find installed compiler 'Intel Parallel Studio XE 2015 for C++ with Microsoft Visual Studio 2015'.
... Looking for compiler 'Intel Parallel Studio XE 2016 for C++ with Microsoft Visual Studio 2015' ...
... Looking for environment variable 'ICPP_COMPILER16' ...No.
Did not find installed compiler 'Intel Parallel Studio XE 2016 for C++ with Microsoft Visual Studio 2015'.
... Looking for compiler 'Intel Parallel Studio XE 2017 for C++ with Microsoft Visual Studio 2015' ...
... Looking for environment variable 'ICPP_COMPILER17' ...No.
Did not find installed compiler 'Intel Parallel Studio XE 2017 for C++ with Microsoft Visual Studio 2015'.
... Looking for compiler 'Intel Parallel Studio XE 2017 for C++ with Microsoft Visual Studio 2017' ...
... Looking for environment variable 'ICPP_COMPILER17' ...No.
Did not find installed compiler 'Intel Parallel Studio XE 2017 for C++ with Microsoft Visual Studio 2017'.
... Looking for compiler 'Intel Parallel Studio XE 2018 for C++ with Microsoft Visual Studio 2015' ...
... Looking for environment variable 'ICPP_COMPILER18' ...No.
Did not find installed compiler 'Intel Parallel Studio XE 2018 for C++ with Microsoft Visual Studio 2015'.
... Looking for compiler 'Intel Parallel Studio XE 2018 for C++ with Microsoft Visual Studio 2017' ...
... Looking for environment variable 'ICPP_COMPILER18' ...No.
Did not find installed compiler 'Intel Parallel Studio XE 2018 for C++ with Microsoft Visual Studio 2017'.
... Looking for compiler 'MinGW64 Compiler (C++)' ...
... Looking for environment variable 'MW_MINGW64_LOC' ...Yes ('C:\ProgramData\MATLAB\SupportPackages\R2018b\3P.instrset\mingw_w64.instrset').
... Looking for file 'C:\ProgramData\MATLAB\SupportPackages\R2018b\3P.instrset\mingw_w64.instrset\bin\g++.exe' ...Yes.
... Looking for folder 'C:\ProgramData\MATLAB\SupportPackages\R2018b\3P.instrset\mingw_w64.instrset' ...Yes.
... Looking for environment variable 'MW_MINGW64_LOC' ...Yes ('C:\ProgramData\MATLAB\SupportPackages\R2018b\3P.instrset\mingw_w64.instrset').
... Executing command 'C:\ProgramData\MATLAB\SupportPackages\R2018b\3P.instrset\mingw_w64.instrset\bin\g++ -dumpmachine' ...No.
Did not find installed compiler 'MinGW64 Compiler (C++)'.
... Looking for compiler 'MinGW64 Compiler with Windows 10 SDK or later (C++)' ...
... Looking for environment variable 'MW_MINGW64_LOC' ...Yes ('C:\ProgramData\MATLAB\SupportPackages\R2018b\3P.instrset\mingw_w64.instrset').
... Looking for file 'C:\ProgramData\MATLAB\SupportPackages\R2018b\3P.instrset\mingw_w64.instrset\bin\g++.exe' ...Yes.
... Looking for folder 'C:\ProgramData\MATLAB\SupportPackages\R2018b\3P.instrset\mingw_w64.instrset' ...Yes.
... Looking for registry setting 'HKLM\SOFTWARE\Wow6432Node\Microsoft\Microsoft SDKs\Windows\v10.0' InstallationFolder ...Yes ('C:\Program Files (x86)\Windows Kits\10\').
... Looking for folder 'C:\Program Files\MATLAB\R2018b' ...Yes.
... Executing command '"C:\Program Files\MATLAB\R2018b\bin\mbuild.bat" -getWin10SDKVersion' ...No.
Did not find installed compiler 'MinGW64 Compiler with Windows 10 SDK or later (C++)'.
... Looking for compiler 'Microsoft Visual C++ 2013' ...
... Looking for registry setting 'HKLM\SOFTWARE\Microsoft\VisualStudio\SxS\VS7' 12.0 ...No.
... Looking for registry setting 'HKCU\SOFTWARE\Microsoft\VisualStudio\SxS\VS7' 12.0 ...No.
... Looking for registry setting 'HKLM\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\SxS\VS7' 12.0 ...No.
... Looking for registry setting 'HKCU\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\SxS\VS7' 12.0 ...No.
Did not find installed compiler 'Microsoft Visual C++ 2013'.
... Looking for compiler 'Microsoft Visual C++ 2015' ...
... Looking for registry setting 'HKLM\SOFTWARE\Microsoft\VisualStudio\SxS\VC7' 14.0 ...No.
... Looking for registry setting 'HKCU\SOFTWARE\Microsoft\VisualStudio\SxS\VC7' 14.0 ...No.
... Looking for registry setting 'HKLM\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\SxS\VC7' 14.0 ...Yes ('C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\').
... Looking for file 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\amd64\cl.exe' ...Yes.
... Looking for folder 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC' ...Yes.
... Looking for registry setting 'HKLM\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v8.1' InstallationFolder ...No.
... Looking for registry setting 'HKCU\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v8.1' InstallationFolder ...No.
... Looking for registry setting 'HKLM\SOFTWARE\Wow6432Node\Microsoft\Microsoft SDKs\Windows\v8.1' InstallationFolder ...Yes ('C:\Program Files (x86)\Windows Kits\8.1\').
... Looking for registry setting 'HKLM\SOFTWARE\Microsoft\VisualStudio\SxS\VS7' 14.0 ...No.
... Looking for registry setting 'HKCU\SOFTWARE\Microsoft\VisualStudio\SxS\VS7' 14.0 ...No.
... Looking for registry setting 'HKLM\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\SxS\VS7' 14.0 ...Yes ('C:\Program Files (x86)\Microsoft Visual Studio 14.0\').
... Looking for registry setting 'HKLM\SOFTWARE\Microsoft\VisualStudio\SxS\VC7' 14.0 ...No.
... Looking for registry setting 'HKCU\SOFTWARE\Microsoft\VisualStudio\SxS\VC7' 14.0 ...No.
... Looking for registry setting 'HKLM\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\SxS\VC7' 14.0 ...Yes ('C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\').
... Looking for registry setting 'HKLM\SOFTWARE\Microsoft\VisualStudio\SxS\VC7' 14.0 ...No.
... Looking for registry setting 'HKCU\SOFTWARE\Microsoft\VisualStudio\SxS\VC7' 14.0 ...No.
... Looking for registry setting 'HKLM\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\SxS\VC7' 14.0 ...Yes ('C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\').
... Looking for file 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat' ...Yes.
... Looking for folder 'C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC' ...Yes.
... Looking for registry setting 'HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows Kits\Installed Roots' KitsRoot10 ...Yes ('C:\Program Files (x86)\Windows Kits\10\').
... Looking for registry setting 'HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows Kits\Installed Roots' KitsRoot10 ...Yes ('C:\Program Files (x86)\Windows Kits\10\').
... Executing command 'echo off&set "sdkversion="&(for /f %a IN ('dir "C:\Program Files (x86)\Windows Kits\10\include\" /b /ad-h /on') do ( @if exist "C:\Program Files (x86)\Windows Kits\10\include\%a\ucrt\" set "sdkversion=%a" ))&call echo %sdkversion%' ...No.
Did not find installed compiler 'Microsoft Visual C++ 2015'.
... Looking for compiler 'Microsoft Visual C++ 2017' ...
... Looking for registry setting 'HKLM\SOFTWARE\Microsoft\VisualStudio\SxS\VS7' 15.0 ...No.
... Looking for registry setting 'HKCU\SOFTWARE\Microsoft\VisualStudio\SxS\VS7' 15.0 ...No.
... Looking for registry setting 'HKLM\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\SxS\VS7' 15.0 ...Yes ('C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\').
... Executing command 'set "vcroot=C:\Program Files (x86)\Microsoft Visual Studio\2017\Community"&for /f "delims= " %a in ('type "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\Microsoft.VCToolsVersion.default.txt"') do @if exist "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\%a\bin\HostX64\x64\cl.exe" call echo %vcroot%' ...No.
Did not find installed compiler 'Microsoft Visual C++ 2017'.
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 https://www.mathworks.com/support/compilers.

Things I've tried -

• Reinstall Matlab (got this new 2018b, upgraded from 2017b)
• Reinstall VS 2017 (I can assert that is can compile C++ files)
• Reinstall Ming from the official Add-Ons Menu

Has anyone encounterd this problem?

Answer 1

[Jan]

I installed R2018b last week. Then I've downloaded the MinGW compiler:

https://www.mathworks.com/matlabcentral/fileexchange/52848-matlab-support-for-mingw-w64-c-c-compiler

and the free community version of the MSVC 2017 compiler suite:

https://visualstudio.microsoft.com/de/downloads/ (here the "de" version)

I've selected these options (sorry for the German, but the translation is trivial):

Afterwards Matlab found the MinGW and the MSVC compiler directly.

[Ido Imanuel]

Hi Jan,

I have these features installed already. Just made sure once more.

Sadly, problem persists.

Notice that the odd part is :

Executing command 'C:\ProgramData\MATLAB\SupportPackages\R2018b\3P.instrset\mingw_w64.instrset\bin\g++ -dumpmachine' ...No.

When I run that command with the power shell, the commands succeeds, providing some identifier string. I also tried running Matlab as Admin - thought it was possible the some permissions were missing, but still no dice.

[Ido Imanuel]

Tried manually installing Ming and setting the environment variable:

setenv('MW_MINGW64_LOC','C:\MinGW\mingw64')

Still cannot execute the relevant -dumpmachine command

... Looking for environment variable 'MW_MINGW64_LOC' ...Yes ('C:\MinGW\mingw64').
... Looking for file 'C:\MinGW\mingw64\bin\g++.exe' ...Yes.
... Looking for folder 'C:\MinGW\mingw64' ...Yes.
... Looking for environment variable 'MW_MINGW64_LOC' ...Yes ('C:\MinGW\mingw64').
... Executing command 'C:\MinGW\mingw64\bin\g++ -dumpmachine' ...No.
Did not find installed compiler 'MinGW64 Compiler (C++)'.

[Ido Imanuel]

And when compiling the demo file now:

>> copyfile(fullfile(matlabroot,'extern','examples','mex','yprime.c'),'.','f')
>> mex yprime.c
Building with 'MinGW64 Compiler (C)'.
Error using mex
The command 'C:\MinGW\mingw64\bin\gcc' exited with a return value '0'

[Laura Rodriguez Moran]

Hi Ido Manuel,

Did you manage to find a solution to Matlab not finding C++ compiler even if it's already installed? I'm facing the same problem and cannot find a solution to it.

Appreciate your response.

[Ido Imanuel]

Besides hitting my head on the wall - no, not really. I think MATLAB suffers from dependency and path issues between different compilers on the system, and the API they uncover for the user via the mex function is very limited - so you cannot bypass the problems yourself.

A clean install of newest MATLAB and Visual Studio 17 (don't take versions above 17) with the C++ compiler support should do the trick - that's what worked for my atleast.

Answer 2

[Fawad Ahmad]

what is the problem. how i fix easily. and how i can findout result of mex.

>> mex -setup

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 https://www.mathworks.com/support/compilers.

[Jan]

Did you install one of the accepted compilers already?

[Fawad Ahmad]

yes i install MinGW-w64 in R2018b matlab.

[Jan]

How did you install it?

Answer 3

[shubham kumar gupta]

Install visual studio 2017, visual studio build tools

now follow this for env variables

https://stackoverflow.com/questions/66050116/set-proper-environment-path-variables-for-visual-studio

Also check this

I have uploaded 5 regedit export files in this Gdrive link which can solve your issue

[CAUTION EDIT LOCATIONS WHERE YOU HAVE INSTALLED YOUR VS]

This may help you to resolve missing keys

http://bit.ly/VSREG

by clicking on edit you can see written inside them, after that you can also edit/export by yourself.