在MATLAB上使用G ++構建問題

Question

我對MATLAB有點陌生，但目前正在嘗試使用G ++（版本6.3）作為編譯器來構建MEX文件。 我得到這個錯誤

MEX completed successfully.
Building with 'g++'.
Error using mex
/disks/local/sceneflow2/./external/libtrws/trwsMex.cpp:14:13: error: conflicting declaration ‘typedef
int mwSize’
In file included from /usr/local/MATLAB/R2016a/extern/include/matrix.h:25:0,
                 from /usr/local/MATLAB/R2016a/extern/include/mex.h:51,
                 from /disks/local/sceneflow2/./external/libtrws/trwsMex.cpp:9:
/usr/local/MATLAB/R2016a/extern/include/tmwtypes.h:795:19: error: ‘mwSize’ has a previous
declaration as ‘typedef size_t mwSize’
/disks/local/sceneflow2/./external/libtrws/trwsMex.cpp:15:13: error: conflicting declaration ‘typedef
int mwIndex’
In file included from /usr/local/MATLAB/R2016a/extern/include/matrix.h:25:0,
                 from /usr/local/MATLAB/R2016a/extern/include/mex.h:51,
                 from /disks/local/sceneflow2/./external/libtrws/trwsMex.cpp:9:
/usr/local/MATLAB/R2016a/extern/include/tmwtypes.h:796:19: error: ‘mwIndex’ has a previous
declaration as ‘typedef size_t mwIndex’


Error in make_mex (line 20)
mex ./external/libtrws/trwsMex.cpp -largeArrayDims CXXFLAGS="\$CXXFLAGS -std=c++0x -fpermissive"
-outdir build

我不明白 為什么mwSize /usr/local/MATLAB/R2016a/extern/include/tmwtypes.h定義與/usr/local/MATLAB/R2016a/extern/include/mex.h沖突？ 它們不是MATLAB隨附的預定義庫嗎（意味着它們應該可以正常工作？）

順便說一句，/ /disks/local/sceneflow2/./external/libtrws/trwsMex.cpp中的一行包含上述的mex.h

Answer 1

錯誤消息必須阻止（針對兩個不同的錯誤），讓我們僅看第一個。 我將其分為三個“行”：

 /disks/local/sceneflow2/./external/libtrws/trwsMex.cpp:14:13: error: conflicting declaration 'typedef int mwSize' In file included from /usr/local/MATLAB/R2016a/extern/include/matrix.h:25:0, from /usr/local/MATLAB/R2016a/extern/include/mex.h:51, from /disks/local/sceneflow2/./external/libtrws/trwsMex.cpp:9: /usr/local/MATLAB/R2016a/extern/include/tmwtypes.h:795:19: error: 'mwSize' has a previous declaration as 'typedef size_t mwSize' 

第一行說，編譯器在trwsMex.cpp文件的第14行找到了mwSize的聲明， mwSize聲明typedef int mwSize 。

最后一行說此mwSize已在MATLAB隨附的tmwtypes.h標頭中定義。

第二行說此頭文件包含在matrix.h ，它包含在mex.h ，該文件包含在第9行的trwsMex.cpp 。

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因此，要解決該錯誤，請不要在MEX文件源代碼中定義mwSize和mwIndex ，它們是由MATLAB的標頭定義的。