Why can't MEX find a supported compiler in MATLAB R2015b after I upgraded to Xcode 7.0?

Asked by MathWorks Support Team on 2 Oct 2015

Latest activity Answered by Yang Gao on 9 Jul 2019

Accepted Answer by MathWorks Support Team

218 views (last 30 days)

I installed Xcode 7.0 on my Mac and tried to use MEX. I receive the following error at the MATLAB command prompt:

>> mex -setup

Error using mex

No supported compiler or SDK was found. For options, visit

http://www.mathworks.com/support/compilers/R2015a/maci64.html

Why does MATLAB not recognize the Xcode 7.0 installation on my Mac?

Products

MATLAB

Release

R2015b

14 Answers

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Answer by MathWorks Support Team on 28 Aug 2017

Edited by MathWorks Support Team on 28 Aug 2017

Accepted Answer

xcode7_mexopts.zip

By default, MATLAB R2015b does not detect Xcode 7.x. To add support for Xcode 7.x in MATLAB R2015b, download the files attached to this article. Please follow these instructions to download and install the files (screenshots were taken in Mac OS X 10.10.5 Yosemite):

1) Download the file xcode7_mexopts.zip, which you will find attached to this article. Extract the contents of xcode7_mexopts.zip to your Downloads directory. Extracting the ZIP file will create a directory in Downloads called xcode7_mexopts.

2) Open MATLAB R2015b. Navigate to MATLAB's preference directory by typing the following command in the command window:

>> cd( prefdir );

3) Using MATLAB's "Current Folder" browser, ensure that there are no XML files that begin with "mex_" (e.g. mex_C_maci64.xml). If such files exist, remove them from the preference directory.

4) Navigate to the MATLAB directory. In MATLAB, you can do so by entering the following command at the MATLAB command prompt:

>> cd( fullfile( matlabroot, 'bin', 'maci64', 'mexopts' ) );

5) Back up the original files in the mexopts directory. You can run the following MATLAB commands to back up the files:

>> mkdir mexoptsContentsOLD
>> movefile *.xml mexoptsContentsOLD/

Keep the backup separate from the downloaded files such that you can revert to the backup files if necessary.

6) Replace any files in the mexopts directory with the corresponding files in the Downloads folder, xcode7_mexopts. You can replace the files in MATLAB by entering the following command at the MATLAB command prompt:

>> movefile( '~/Downloads/xcode7_mexopts/*.xml', '.' );

7) Restart MATLAB R2015b. Execute "mex -setup" at the MATLAB command prompt as shown below and verify that MEX detects Xcode 7.0.

>> mex -setup

Alternate Solution:

The SDK needed could be in the Xcode package with the path:

/Applications/XCODE/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk

Please place this in:

/Library/Developer/CommandLineTools/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk

This should resolve the issue.

If MEX continues to return an error, please contact MathWorks Technical Support.

21 Comments

Show 18 older comments

Utkarsh Anand on 9 Dec 2017

using a '13' works out for me somehow.

Thanks for the suggestion Elco

Landary on 6 May 2018

it works when it I place it with 13

Yingjuan Wu on 23 Aug 2018

works for me. Thanks!!

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Answer by Chun-Hsien Lin on 27 Nov 2015

I found this workaround. It works for me.

2 Comments

Hsi-Ming Chang on 31 Mar 2016

Thank you. This solved my problem.

Marcel Goldschen on 10 Jun 2016

Yup, this worked for me too. Thanks.

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Answer by XIE STONE on 21 Sep 2016

I try and it did not work for me. :(

Any good idea?

11 Comments

Show 8 older comments

Walter Roberson on 7 Nov 2016

You need to make the change in two places.

For me the block looks like

        <ISYSROOT>
            <and>
                <cmdReturns name="xcode-select -print-path"/>
                <or>
                    <dirExists name="$$/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk" />
                    <dirExists name="$$/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk" />
                    <dirExists name="$$/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk" />
                    <dirExists name="$$/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk" />          
                    <cmdReturns name="find $$ -name MacOSX10.12.sdk | egrep 'MacOSX10.12.sdk'" />
                    <cmdReturns name="find $$ -name MacOSX10.11.sdk | egrep 'MacOSX10.11.sdk'" />
                    <cmdReturns name="find $$ -name MacOSX10.10.sdk | egrep 'MacOSX10.10.sdk'" />
                    <cmdReturns name="find $$ -name MacOSX10.9.sdk | egrep 'MacOSX10.9.sdk'" />
                </or>
            </and>
        </ISYSROOT>
        <SDKVER>
            <and>
                <and>
                    <cmdReturns name="xcode-select -print-path"/>
                    <or>
                        <dirExists name="$$/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk" />
                        <dirExists name="$$/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk" />
                        <dirExists name="$$/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk" />
                        <dirExists name="$$/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk" />
                        <cmdReturns name="find $$ -name MacOSX10.12.sdk | egrep 'MacOSX10.12.sdk'" />
                        <cmdReturns name="find $$ -name MacOSX10.11.sdk | egrep 'MacOSX10.11.sdk'" />
                        <cmdReturns name="find $$ -name MacOSX10.10.sdk | egrep 'MacOSX10.10.sdk'" />
                        <cmdReturns name="find $$ -name MacOSX10.9.sdk | egrep 'MacOSX10.9.sdk'" />
                    </or>
                </and>
                <cmdReturns name="echo $$ | rev | cut -c1-10 | rev | egrep -oh '[0-9]+\.[0-9]+'" />
            </and>
        </SDKVER>

Jianyang Shi on 18 Apr 2017

Perfect! Thanks.

Darshan Patil on 27 Apr 2017

Thanks!

lio jello on 29 May 2017

it really works, thanks

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Answer by Hamid Sarfraz on 25 Feb 2016

Edited by Hamid Sarfraz on 25 Feb 2016

mex -setup

MEX configured to use 'Xcode with Clang' for C language compilation.

Warning: The MATLAB C and Fortran API has changed to support MATLAB variables with more than 2^32-1 elements. In the near future you will be required to update your code to utilize the new API. You can find more information about this at: http://www.mathworks.com/help/matlab/matlab_external/upgrading-mex-files-to-use-64-bit-api.html.

To choose a different language, select one from the following:

 mex -setup C++ 
 mex -setup FORTRAN

MEX configured to use 'Xcode Clang++' for C++ language compilation.

Error using mex

No supported compiler or SDK was found. For options, visit http://www.mathworks.com/support/compilers/R2015b/maci64.html.

any explanation(solution) for this ?

1 Comment

Esha Bhargava on 4 May 2016

If the workaround provided above does not work for you, please contact MathWorks Technical Support.

Link

Answer by Brigitte Reniers on 1 Mar 2016

Edited by Walter Roberson on 2 Mar 2016

I did all that and I still get this error:

mex Gamma4DCPU.cpp
Building with 'Xcode Clang++'.
Error using mex
/Users/brigitte/Documents/SmartScientificSolutions/Code/Gamma4D/Gamma4DCPU.cpp:111:10:
fatal error: 'malloc.h' file not found
#include <malloc.h>
         ^
1 error generated.

Does anybody know what it's about?

1 Comment

Xiaoyu Sun on 30 Mar 2016

I also get this error.did you solve this problem successfully?

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Answer by Pascal on 30 Mar 2016

worked for me. Perfectly. Thanks

1 Comment

Richa Gupta on 25 Apr 2016

If the workaround provided above does not work for you, please contact MathWorks Technical Support.

Link

Answer by Wichchuwon Sookchaisri on 7 May 2016

really thanks! It works!

0 Comments

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Answer by cihat tek on 18 May 2016

for windows ?

 >> mex -setup
 Error using mex
 No supported compiler or SDK was found. For options, visit
 http://www.mathworks.com/support/compilers/R2015a/maci64.html.

1 Comment

Walter Roberson on 18 May 2016

The error message suggests you are on OS-X but your question has to do with MS Windows?

For OS-X you should follow the instructions above.

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Answer by Hitham on 13 Jun 2016

Edited by David on 18 Jan 2017

I have the same problem. I am using MATLAB R2014b (It is said, No supported compiler or SDK was found. For options, visit http://www.mathworks.com/content/dam/mathworks/mathworks-dot-com/support/sysreq/files/SystemRequirements-Release2014b_SupportedCompilers.pdf ).

How to fix it?

2 Comments

Esha Bhargava on 17 Jun 2016

If the workaround provided above does not work for you, please contact MathWorks Technical Support.

Vandana Ravichandran on 22 Feb 2017

What is your platform and Xcode version? Note that the supported compilers for MATLAB R2014b are Xcode 4.6+ and Xcode 5.0

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Answer by Bhavesh Dharmani on 27 Jun 2016

I have installed just the Xcode command line tools and it is installed at /Library/Developer/CommandLineTools. So, whether the same solution will work for me?

I have also changed [matlabroot '/bin/maci64/mexopts/clang_maci64.xml'] and [matlabroot '/bin/maci64/mexopts/clang++_maci64.xml'] to search corresponding to mac OSX 10.11. But, nothing works to setup mex.

1 Comment

Richa Gupta on 21 Jul 2016

Bhavesh, I would suggest contacting MathWorks Technical Support.

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Answer by viktor navorski on 24 Jul 2016

Thank you. The problem was solved on OS X 10.11.6 (15G31)

0 Comments

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Answer by ahmed ali on 29 Sep 2016

i want to ask about the detailed steps to download minGW-compiler for mex files for matlab 2015b

2 Comments

Walter Roberson on 7 Oct 2016

minGW is not a supported compiler for OS-X (which is what this Question is about). minGW is a port of gcc to MS Windows specifically, and is not relevant to other operating systems.

Anudeep Katragadda on 21 Oct 2016

@ahamed ali Here is a link from MathWorks documentation that might help you: https://www.mathworks.com/help/matlab/matlab_external/install-mingw-support-package.html

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Answer by Fateh Benma on 24 Jun 2017

i have this error !! why ?? any help >> mex -setup Warning: Xcode appears to be installed, but it has not been configured. Run "osascript -e 'do shell script "xcode-select -switch /Applications/Xcode.app" with administrator privileges'" to configure Xcode. You must be an administrator of this computer to complete this action.

Error using mex No supported compiler or SDK was found. For options, visit http://www.mathworks.com/support/compilers/R2014a/win64. >>

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Answer by Yang Gao on 9 Jul 2019

Hi! I have problem with my Matlab_R2019a, and my Xcode version is 11. MacOS version 10.14.5.

I can't find any string that contains MacOSX10.12.sdk or similiar string in my clang and clang++ file.

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