环境：32位电脑，matlab2012b，Visual Studio 2010
真的是自己瞎折腾，关于matlab安装Visual Studio 2010编译器的问题搞了两天多了，终于弄出来了，要哭了~~~~~
之前装的是Visual Studio 2012，然后用matlab编译的时候就出问题了，刚开始时搜不到装的Visual Studio 2012，然后网上找了各种教程，试了各种方法（我是学渣- -也不 知道哪种方法对），后来可以搜到Visual Studio 2012了，但是安装还是出错，然后继续网上找各种教程，试来试去还是不行，好吧我放弃了。。。然后装回了Visual Studio 2010，然后编译的时候就成功了= =对！！一下子就成功了，所以我刚开始说我是在折腾！所以如果你的matlab是2012b，还是乖乖去下个低点版本的Visual Studio 吧，比如Visual Studio 2010
接下来才是正题，安装好编译器之后，然后就是编译LibSVM函数库。具体做法见下：
1. 网上下载好LibSVM函数库
2.打开matlab，路径为libsvm\matlab ，输入部分我用高亮标出
>> mex -setup
Welcome to mex -setup. This utility will help you set up
a default compiler. For a list of supported compilers, see
http://www.mathworks.com/support/compilers/R2012b/win32.html
Please choose your compiler for building MEX-files:
Would you like mex to locate installed compilers [y]/n? n
Select a compiler:
[1] Intel C++ 12.0 (with Microsoft Software Development Kit (SDK) linker)
[2] Intel C++ 12.0 (with Microsoft Visual C++ 2008 SP1 linker)
[3] Intel C++ 12.0 (with Microsoft Visual C++ 2010 linker)
[4] Intel C++ 11.1 (with Microsoft Visual C++ 2008 SP1 linker)
[5] Intel Visual Fortran 12 (with Microsoft Software Development Kit (SDK) linker)
[6] Intel Visual Fortran 12.0 (with Microsoft Visual C++ 2008 SP1 linker)
[7] Intel Visual Fortran 12.0 (with Microsoft Visual C++ 2008 Shell linker)
[8] Intel Visual Fortran 12.0 (with Microsoft Visual C++ 2010 linker)
[9] Intel Visual Fortran 11.1 (with Microsoft Visual C++ 2008 SP1 linker)
[10] Intel Visual Fortran 11.1 (with Microsoft Visual C++ 2008 Shell linker)
[11] Lcc-win32 C 2.4.1
[12] Microsoft Software Development Kit (SDK) 7.1
[13] Microsoft Visual C++ 2005 SP1
[14] Microsoft Visual C++ 2008 SP1
[15] Microsoft Visual C++ 2010
[16] Microsoft Visual C++ 2012
[17] Open WATCOM C++
[0] None
Compiler: 15 （这里选择的是我刚刚装的编译器）
Your machine has a Microsoft Visual C++ 2010 compiler located at
d:\安装文件\Visual Studio 2010\. Do you want to use this compiler [y]/n? （回车）
Please verify your choices:
Compiler: Microsoft Visual C++ 2010
Location: d:\安装文件\Visual Studio 2010\
Are these correct [y]/n? （回车）
***************************************************************************
Warning: MEX-files generated using Microsoft Visual C++ 2010 require
that Microsoft Visual Studio 2010 run-time libraries be
available on the computer they are run on.
If you plan to redistribute your MEX-files to other MATLAB
users, be sure that they have the run-time libraries.
***************************************************************************
Trying to update options file: C:\Users\Administrator\AppData\Roaming\MathWorks\MATLAB\R2012b\mexopts.bat
From template: D:\MATLAB~1\bin\win32\mexopts\msvc100opts.bat
Done . . .
**************************************************************************
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/techdoc/matlab_external/bsflnue-1.html
Building with the -largeArrayDims option enables the new API.
**************************************************************************
>> make
然后发现这个文件夹中多出来了四个文件，分别是libsvmread.mexw32 libsvmwrite.mexw32 svmpredict.mexw32 svmtrain.mexw32
这样就编译好了！（终于啊！！泪奔）