在 MATLAB 上使用 G++ 构建时出现问题

Problems building with G++ on MATLAB

本文关键字：问题 构建 G++ MATLAB      更新时间：2023-10-16

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 mwSize的定义与/usr/local/MATLAB/R2016a/extern/include/mex.h冲突？它们不是包含在 MATLAB 中的预定义库吗(这意味着它们应该可以正常工作？

顺便说一下，/disks/local/sceneflow2/./external/libtrws/trwsMex.cpp有一条线，其中包括上述mex.h。

错误消息必须阻止(对于两个不同的错误(，让我们只看第一个。我把它分成三行：

/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trwsMex.cpp文件的第 14 行找到了 mwSize 的声明，其中显示 typedef int mwSize 。

最后一行说这个mwSize已经在 MATLAB 附带的tmwtypes.h标头中定义。

第二行说这个头文件包含在 matrix.h 中，它包含在 mex.h 中，包含在第 9 行的trwsMex.cpp中。

因此，要修复此错误，请不要在 MEX 文件源代码中定义mwSize和mwIndex，这些由 MATLAB 的标头定义。

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