Question

我对MATLAB有点陌生，但目前正在尝试使用G ++（版本6.3）作为编译器来构建MEX文件。我收到此错误

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。为什么/usr/local/MATLAB/R2016a/extern/include/tmwtypes.h的{{1}}定义与mwSize冲突？它们不是MATLAB随附的预定义库（这意味着它们应该可以正常工作吗？）

顺便说一下，/usr/local/MATLAB/R2016a/extern/include/mex.h的一行包含上述/disks/local/sceneflow2/./external/libtrws/trwsMex.cpp。

Answer 1

错误消息必须阻止（针对两个不同的错误），让我们仅看第一个。我将其分为三个“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’

第一行说，编译器在mwSize文件的第14行找到了trwsMex.cpp的声明，并在其中声明了typedef int mwSize。

最后一行说此mwSize已在MATLAB随附的tmwtypes.h标头中定义。

第二行说此头文件由matrix.h包含，由mex.h包含，而trwsMex.cpp包含在第9行。

因此，要解决该错误，请不要在MEX文件源代码中定义mwSize和mwIndex，这些是由MATLAB的标头定义的。

在MATLAB上使用G ++构建问题

1 个答案: