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;

据我所知，我的机器上唯一改变的是 Xcode 更新到了 5.1 版 (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 代码有什么解决方法吗?

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

[在 OS 10.9.2 和 Apple LLVM 版本 5.1 (clang-503.0.38)(基于 LLVM 3.4svn)上运行]

[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，升级后的 Clang 不设置 char16_t，这是 MATLAB 所要求的.

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 ...

下面的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 配置文件中将 -std=c++11 添加到 CXXFLAGS 并编译 .cpp 文件而不是 .c.mex 配置文件是 mexopts.sh(R2014a 之前的版本)或 mex -setup (R2014a+) 指示的 .xml 文件.这对 OP 有效，但下一个选项也有效.请务必编辑活动/已安装的配置，而不是系统范围的参考.如果您不知道，请尝试下一个解决方案.
• 在包含 mex.h 之前，使用 #define 或 typedef 创建 char16_t(请参阅下面的其他解决方法").
• 在未来的 MATLAB 版本中，这将得到修复.重新运行 mex -setup 让 MATLAB 为您重新配置它并且它可以工作.从 R2014a 开始，这不起作用.
• 作为最后的手段，您可以随时修改 MATLAB 安装，按照 Dennis 的建议修改 MATLAB 的 tmwtypes.h，但我强烈建议不要修改 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:如果您使用的是 C 并且不能或不想更改为 C++，请按照 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

如果由于某种原因您无法启用 C++11 标准，您可以使用预处理器来定义 char16_t.要么把#define char16_t uint16_t before #include "mex.h"，或者用编译器命令行设置:

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，使用 typedef，再次before 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，请尝试将 uint16_t 更改为 UINT16_T.此外，其他人报告说，简单地包含 uchar.h 会引入类型，但其他人没有该标题.

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.

这篇关于MEX 编译错误:未知类型名称“char16_t"的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！