matlab 2012a mex设置,matlab2017 搭配vs2015 mex 设置

matlab2017安装matconvnet-1.0-beta25

然后，运行matlab/vl_compilenn.m，结果总是提示

Error using vl_compilenn>check_compability (line 535)

Unsupported VS C++ compiler, ver >=14.0 required (VS 2015).

Error in vl_compilenn (line 197)

check_compability(arch);

输入： mbuild -setup

MBUILD configured to use 'Microsoft Visual C++ 2015 Professional (C)' for C language compilation.

To choose a different C compiler, select one from the following:

Microsoft Visual C++ 2012 (C)  mex -setup:D:Matlab17binwin64mexoptsmsvc2012.xml C -client MBUILD

Microsoft Visual C++ 2013 Professional (C)  mex -setup:D:Matlab17binwin64mexoptsmsvc2013.xml C -client MBUILD

Microsoft Visual C++ 2015 Professional (C)  mex -setup:C:UserswzyAppDataRoamingMathWorksMATLABR2017aMBUILD_C_win64.xml C -client MBUILD

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

mex -setup C++ -client MBUILD

mex -setup FORTRAN -client MBUILD

输入：mex -setup MEX configured to use 'Microsoft Visual C++ 2015 Professional (C)' for C language compilation. Warning: The MATLAB C and Fortran API has changed to support MATLAB variables with more than 2^32-1 elements. 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 C compiler, select one from the following: Microsoft Visual C++ 2012 (C)  mex -setup:D:Matlab17binwin64mexoptsmsvc2012.xml C Microsoft Visual C++ 2013 Professional (C)  mex -setup:D:Matlab17binwin64mexoptsmsvc2013.xml C Microsoft Visual C++ 2015 Professional (C)  mex -setup:C:UserswzyAppDataRoamingMathWorksMATLABR2017amex_C_win64.xml C To choose a different language, select one from the following: mex -setup C++ mex -setup FORTRAN

都改成vs2015了呀，为什么还是有问题？

忽然我点了一下 mex -setup C++ ，然后选择vs2015，再运行vl_compilenn 居然就好了