How to set the c compiler of matlab2013a in OSX 10.9?

I am using matlab 2013a to run a simulink with matlab function. I tried basically everything on the Q&A section but I could get it working.

My current version of matlab is 2013a. I have downloaded Xcode 5.1 and also the command line tools. The version of OSX is 10.9.

I have tried http://www.mathworks.com/matlabcentral/answers/88627-could-anyone-know-how-to-use-xcode-5-0-as-my-c-or-c-compiler-in-matlab-2012b-or-later . but it is still not working.

When I "mex -setup"

    Options files control which compiler to use, the compiler and link command
    options, and the runtime libraries to link against.

    Using the 'mex -setup' command selects an options file that is
    placed in /Users/WU/.matlab/R2013a and used by default for 'mex'. An options 
    file in the current working directory or specified on the command line 
    overrides the default options file in /Users/WU/.matlab/R2013a.

    To override the default options file, use the 'mex -f' command
    (see 'mex -help' for more information).

The options files available for mex are:

1: /Applications/MATLAB_R2013a.app/bin/mexopts.sh : 
    Template Options file for building MEX-files

0: Exit with no changes

Enter the number of the compiler (0-1): 1

Overwrite /Users/WU/.matlab/R2013a/mexopts.sh ([y]/n)? y

/Applications/MATLAB_R2013a.app/bin/mexopts.sh is being copied to /Users/WU/.matlab/R2013a/mexopts.sh

Also when I was trying to run the simulink it shows:

Making simulation target "cruise_control_model_sfun", ...

/Applications/MATLAB_R2013a.app/bin/mex -c -O -DMATLAB_MEX_FILE -I/Applications/MATLAB_R2013a.app/stateflow/c/mex/include -I/Applications/MATLAB_R2013a.app/stateflow/c/debugger/include cruise_control_model_sfun.c In file included from cruise_control_model_sfun.c:3: In file included from ./cruise_control_model_sfun.h:6: In file included from /Applications/MATLAB_R2013a.app/stateflow/c/mex/include/sfc_sf.h:33: In file included from /Applications/MATLAB_R2013a.app/simulink/include/mwmathutil.h:23: /Applications/MATLAB_R2013a.app/extern/include/tmwtypes.h:819:9: error: unknown type name 'char16_t' typedef char16_t CHAR16_T; ^ 1 error generated.

    mex: compile of ' "cruise_control_model_sfun.c"' failed.

gmake: * [cruise_control_model_sfun.o] Error 1

Error using cruise_control_simulation (line 42) Error using targetman>throw_make_error (line 578) (SLSF Diagnostic)

Many thanks

[Ken Atwell]

Can you start with a simpler example, like the one at http://www.mathworks.com/help/matlab/matlab_external/build-an-executable-mex-file.html ?

Try running 'mex -v timestwo.c' and paste the output here -- -v is for verbose and should give us a clue as to why MEX is failing.

[Yujia]

Ken, I tried Xcode 5.0.2 and solved this. It seems that 5.1 is not compatible with matlab 2013a.

[Johan]

I've just started to have the same char16_t issue. OSX 10.9, recently updated to Xcode 5.1, Matlab 2011a. The interesting thing is that when I download the latest version of the simulink model I'm working on from svn, it compiles and runs fine, but when I change any of the embedded matlab code blocks in it, it starts throwing this undefined char16_t error.

The compiler output you asked for:

>> mex -v timestwo.c
-> mexopts.sh sourced from directory (DIR = $HOME/.matlab/$REL_VERSION)
   FILE = /Users/***/.matlab/R2011a/mexopts.sh
----------------------------------------------------------------
->    MATLAB                = /Applications/MATLAB_R2011a.app
->    CC                    = gcc
->    CC flags:
         CFLAGS             = -fno-common -no-cpp-precomp -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -mmacosx-version-min=10.9  -fexceptions
         CDEBUGFLAGS        = -g
         COPTIMFLAGS        = -O2 -DNDEBUG
         CLIBS              = -L/Applications/MATLAB_R2011a.app/bin/maci64 -lmx -lmex -lmat -lstdc++
         arguments          =  -DMX_COMPAT_32
->    CXX                   = g++
->    CXX flags:
         CXXFLAGS           = -fno-common -no-cpp-precomp -fexceptions -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -mmacosx-version-min=10.9
         CXXDEBUGFLAGS      = -g
         CXXOPTIMFLAGS      = -O2 -DNDEBUG
         CXXLIBS            = -L/Applications/MATLAB_R2011a.app/bin/maci64 -lmx -lmex -lmat -lstdc++
         arguments          =  -DMX_COMPAT_32
->    FC                    = gfortran
->    FC flags:
         FFLAGS             = -fexceptions -m64 -fbackslash
         FDEBUGFLAGS        = -g
         FOPTIMFLAGS        = -O
         FLIBS              = -L/Applications/MATLAB_R2011a.app/bin/maci64 -lmx -lmex -lmat -L -lgfortran -L -lgfortranbegin
         arguments          =  -DMX_COMPAT_32
->    LD                    = gcc
->    Link flags:
         LDFLAGS            = -Wl,-twolevel_namespace -undefined error -arch x86_64 -Wl,-syslibroot,/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -mmacosx-version-min=10.9 -bundle -Wl,-exported_symbols_list,/Applications/MATLAB_R2011a.app/extern/lib/maci64/mexFunction.map
         LDDEBUGFLAGS       = -g
         LDOPTIMFLAGS       = -O
         LDEXTENSION        = .mexmaci64
         arguments          = 
->    LDCXX                 = 
->    Link flags:
         LDCXXFLAGS         = 
         LDCXXDEBUGFLAGS    = 
         LDCXXOPTIMFLAGS    = 
         LDCXXEXTENSION     = 
         arguments          = 
----------------------------------------------------------------

Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
-> gcc -c  -I/Applications/MATLAB_R2011a.app/extern/include -I/Applications/MATLAB_R2011a.app/simulink/include -DMATLAB_MEX_FILE -fno-common -no-cpp-precomp -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -mmacosx-version-min=10.9  -fexceptions  -DMX_COMPAT_32 -O2 -DNDEBUG  "timestwo.c"

In file included from timestwo.c:1:
In file included from /Applications/MATLAB_R2011a.app/extern/include/mex.h:58:
/Applications/MATLAB_R2011a.app/extern/include/matrix.h:335:13: error: unknown type name 'char16_t'
    typedef char16_t mxChar;
            ^
1 error generated.

      mex: compile of ' "timestwo.c"' failed.

??? Error using ==> mex at 208
Unable to complete successfully.

[Johan]

Now downloaded Xcode 5.0.2 again and everything works with this. The separately installed command line tools remain at version 5.1.

Answer 1

[Jon C]

The char16_t error is the same the one in both this and this other question, although those both pertain to a C++ solution rather than C.

The C solution would be to typedef or define the char16_t type, as described on this page. Basically, on the mex command line, add:

 -Dchar16_t=uint16_t

OR edit the .c source, just before #include "mex.h":

 typedef uint16_t char16_t;