MEX编译错误：未知类型名称'char16_t' [英] MEX compile error: unknown type name 'char16_t'

问题描述

由于发生以下错误，我无法编译任何MATLAB MEX代码：

I cannot compile any MATLAB MEX code due to the following error:

In file included from /Applications/MATLAB_R2013a.app/extern/include/mex.h:58:
In file included from /Applications/MATLAB_R2013a.app/extern/include/matrix.h:294:
/Applications/MATLAB_R2013a.app/extern/include/tmwtypes.h:819:9: error: unknown type name 'char16_t'
typedef char16_t CHAR16_T;

在我的机器上改变的唯一的事情就是我记得的是Xcode更新为版本5.1（5B130a）。

The only thing that has changed on my machine as far as I can remember is that Xcode was updated to version 5.1 (5B130a).

暂时在MATLAB中编译MEX代码的任何修复程序？

Any fix for the time being to compile MEX code in MATLAB?

在OS 10.9.2上使用Apple LLVM版本5.1（clang-503.0.38）（基于LLVM 3.4svn）运行]

[Running on OS 10.9.2 with Apple LLVM version 5.1 (clang-503.0.38) (based on LLVM 3.4svn)]

推荐答案

默认情况下，升级的Clang不会设置 char16_t ，这是MATLAB需要的。

By default, the upgraded Clang doesn't set char16_t, which is required by MATLAB.

这适用于C或C ++代码，但需要在每个 mex 命令行上完成。

This works for C or C++ code but needs to be done on each mex command line.

>> mex -Dchar16_t=uint16_t ...

以下其他解决方案将此定义放入mex配置或启用C ++ 11。

Other solutions below put this definition into the mex configuration or enable C++11.

选项：

• 在您的mex配置中添加 -std = c ++ 11 到 CXXFLAGS 文件并且编译.cpp文件而不是.c。 mex配置文件是mexopts.sh（pre-R2014a）或由 mex -setup （R2014a +）指示的.xml文件。 这对OP有效，但下一个选项也可以。确保编辑活动/安装的配置，而不是系统范围的引用。


• 使用 #define 或 typedef 在包含mex.h之前创建 char16_t （请参阅下面的其他解决方法）。


• 在某些未来版本MATLAB，这个会被修复。重新运行 mex -setup 让MATLAB重新配置它，它工作。


• 作为最后一种手段，你可以随时修改MATLAB的安装，攻破MATLAB的tmwtypes.h，Dennis建议，但我强烈建议 修改MATLAB安装。

• Add -std=c++11 to CXXFLAGS in your mex configuration file AND compile .cpp files instead of .c. The mex config file is mexopts.sh (pre-R2014a) or the .xml file indicated by mex -setup (R2014a+). This is what worked for OP, but the next option works too. Be sure to edit the active/installed config, not the system-wide reference. Try the next solution if you can't tell.
• Use a #define or typedef to create char16_t before including mex.h (see "other workaround" below).
• In some future version of MATLAB, this will have been fixed. Re-run mex -setup to have MATLAB reconfigure it for you and it works. As of R2014a, this doesn't do the trick.
• As a last resort, you can always modify the MATLAB installation, hacking MATLAB's tmwtypes.h as Dennis suggests, but I strongly suggest NOT modifying the MATLAB installation.

注意：如果你使用C，不能或不想更改为C ++，请按照此其他答案中的解决方案，或查看下面的替代解决方法。

Note: If you are using C and cannot or don't want to change to C++, follow the solution in this other answer, OR see the alternative workaround below.

其他解决方法

如果由于某种原因不能启用C ++ 11标准，可以使用预处理器定义 char16_t 。可以在 之前插入 #define char16_t uint16_t ，或者设置mex.h它与编译器命令行：

If for some reason you are not able to enable the C++11 standard, you can use the preprocessor to define char16_t. Either put #define char16_t uint16_t before #include "mex.h", or set it with the compiler command line:

-Dchar16_t=uint16_t

或者，在之前使用 typedef ，包括mex.h：

Alternatively, use a typedef, again before including mex.h:

typedef uint16_t char16_t;

如果这些解决方案不起作用，请尝试更改 uint16_t 到 UINT16_T 。此外，其他人已经报道，只是包括uchar.h带来了类型，但其他人没有那个头。

If these solutions don't work, try changing uint16_t to UINT16_T. Further yet, others have reported that simply including uchar.h brings in the type, but others don't have that header.

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