Why can't MEX find a supported compiler in MATLAB R2017a in macOS Sierra

Question

Peter Kerekes 2017-6-26

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https://ww2.mathworks.cn/matlabcentral/answers/346261-why-can-t-mex-find-a-supported-compiler-in-matlab-r2017a-in-macos-sierra

评论： Adawat Chanchua 2019-9-15

I'm using the latest macOS (Sierra 10.12.5) and mex can not find the compiler, or SDK even if the latest Xcode (8.3.3) and Intel Paralell Studio are installed.

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Answer 1

Walter Roberson 2017-6-26

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https://ww2.mathworks.cn/matlabcentral/answers/346261-why-can-t-mex-find-a-supported-compiler-in-matlab-r2017a-in-macos-sierra#answer_271962

See https://www.mathworks.com/matlabcentral/answers/243868-mex-can-t-find-compiler-after-xcode-7-update-r2015b#comment_407066 for my files. I have tested them on Sierra with XCode 8.3 using R2017a.

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Peter Kerekes 2017-6-27

编辑：Walter Roberson 2017-6-27

在 MATLAB Online 中打开

Screen Shot 2017-06-27 at 17.08.18.png

>> mex -v -setup
Verbose mode is on.
... Looking for compiler 'Xcode with Clang' ...
... Looking for environment variable 'DEVELOPER_DIR' ...No.
... Executing command 'xcode-select -print-path' ...Yes ('/Library/Developer/CommandLineTools').
... Looking for folder '/Library/Developer/CommandLineTools' ...Yes.
... Executing command 'which xcrun' ...Yes ('/usr/bin/xcrun').
... Looking for folder '/usr/bin' ...Yes.
... Executing command 'defaults read com.apple.dt.Xcode IDEXcodeVersionForAgreedToGMLicense' ...No.
... Executing command 'defaults read /Library/Preferences/com.apple.dt.Xcode IDEXcodeVersionForAgreedToGMLicense' ...Yes ('8.3.3').
... Executing command '
agreed=8.3.3 
 if echo $agreed | grep -E '[\.\"]' >/dev/null; then 
 lhs=`expr "$agreed" : '\([0-9]*\)[\.].*'` 
  rhs=`expr "$agreed" : '[0-9]*[\.]\(.*\)$'` 
 if echo $rhs | grep -E '[\."]' >/dev/null; then 
 rhs=`expr "$rhs" : '\([0-9]*\)[\.].*'` 
 fi 
 if [ $lhs -gt 4 ] || ( [ $lhs -eq 4 ] && [ $rhs -ge 3 ] ); then 
 echo $agreed 
 else 
 exit 1
 fi 
 fi' ...Yes ('8.3.3').
... Executing command 'xcode-select -print-path' ...Yes ('/Library/Developer/CommandLineTools').
... Looking for folder '/Library/Developer/CommandLineTools/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk' ...No.
... Looking for folder '/Library/Developer/CommandLineTools/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk' ...No.
... Looking for folder '/Library/Developer/CommandLineTools/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk' ...No.
... Looking for folder '/Library/Developer/CommandLineTools/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk' ...No.
... Executing command 'find /Library/Developer/CommandLineTools -name MacOSX10.9.sdk' ...No.
... Executing command 'find $$ -name MacOSX10.10.sdk' ...No.
... Executing command 'find $$ -name MacOSX10.11.sdk' ...No.
... Executing command 'find $$ -name MacOSX10.12.sdk' ...No.
Did not find installed compiler 'Xcode with Clang'.
Error using mex
No supported compiler or SDK was found. For options, visit
http://www.mathworks.com/support/compilers/R2017a/.
>>

Natasha M Drissi 2017-12-15

在 MATLAB Online 中打开

I had the same problem and so I tried to see if I could solve it the same way but when I do I get this message instead

 error: --switch must be run as root (e.g. `sudo xcode-select --switch <xcode_folder_path>`).

Walter Roberson 2017-12-16

在 MATLAB Online 中打开

Okay, so use sudo then...

sudo xcode-select --switch /Applications/Xcode.app

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Answer 2

Vahan Petrosyan 2018-3-6

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https://ww2.mathworks.cn/matlabcentral/answers/346261-why-can-t-mex-find-a-supported-compiler-in-matlab-r2017a-in-macos-sierra#answer_308691

编辑：Walter Roberson 2018-3-6

在 MATLAB Online 中打开

Building with 'Xcode with Clang'.
/usr/bin/xcrun -sdk macosx/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk clang -c -DUSE_MEX_CMD   -DMATLAB_MEX_FILE -I"/usr/local/include"  -I"/Applications/MATLAB_R2017b.app/extern/include" -I"/Applications/MATLAB_R2017b.app/simulink/include" -fno-common -arch x86_64 -mmacosx-version-min=10.13 -fexceptions -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk -O2 -fwrapv -DNDEBUG "/Users/vahan/Desktop/research/Image Segmentation/algorithms/SEEDS LSC/timestwo.c" -o /var/folders/9t/cj2m3vms6l3_sdmj0nxqxch80000gn/T/mex_38352988742257_1467/timestwo.o
Error using mex
xcodebuild: error: SDK
"macosx/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk" cannot be
located.
xcrun: error: unable to find utility "clang", not a developer tool or in PATH

I am receiving the following error. It seems that after -sdk, my directory starts from maxosx. Can someone tell me what do to ?

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Walter Roberson 2018-3-6

在 MATLAB Online 中打开

Try (from Terminal)

sudo xcode-select --switch /Applications/Xcode.app

Adawat Chanchua 2019-9-15

Thanks, you mad my day.

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Why can't MEX find a supported compiler in MATLAB R2017a in macOS Sierra

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