在 Matlab 中编译 mex 文件时找不到标准 C 库答案

【问题标题】：Standard C libraries not found when compiling mex files in Matlab在 Matlab 中编译 mex 文件时找不到标准 C 库
【发布时间】：2012-11-14 19:32:43
【问题描述】：

更新：我安装了 XCode 并在 mexopts.sh 中更改了 SDKROOT 以反映here 中描述的实际路径，但是当我包含 mex.h 时仍然出现此错误：

In file included from /Applications/MATLAB_R2012b.app/extern/include/matrix.h:294,
                 from /Applications/MATLAB_R2012b.app/extern/include/mex.h:58,
                 from test.c:2:
/Applications/MATLAB_R2012b.app/extern/include/tmwtypes.h:61:21: error: float.h: No such file or directory

    mex: compile of ' "test.c"' failed.

我正在尝试通过 mex 编译一个简单的 C 文件以在 Matlab 中使用，但它似乎永远找不到我知道已安装的默认库。例如，尝试编译以下内容：

#include <string.h>
int main() {
    return 0;
}

给我错误：

test.c:1:20: error: string.h: No such file or directory
mex: compile of ' "test.c"' failed.

即使它使用 gcc 编译得很好。更糟糕的是，当我尝试像这样包含 mex.h 时：

#include "mex.h"
int main() {
    return 0;
}

我收到以下错误：

In file included from /Applications/MATLAB_R2012b.app/extern/include/mex.h:58,
                 from test.c:2:
/Applications/MATLAB_R2012b.app/extern/include/matrix.h:293:20: error: stddef.h: No such file or directory
In file included from /Applications/MATLAB_R2012b.app/extern/include/matrix.h:294,
                 from /Applications/MATLAB_R2012b.app/extern/include/mex.h:58,
                 from test.c:2:
/Applications/MATLAB_R2012b.app/extern/include/tmwtypes.h:43:20: error: limits.h: No such file or directory
/Applications/MATLAB_R2012b.app/extern/include/tmwtypes.h:46:21: error: stdbool.h: No such file or directory
/Applications/MATLAB_R2012b.app/extern/include/tmwtypes.h:61:21: error: float.h: No such file or directory
/Applications/MATLAB_R2012b.app/extern/include/tmwtypes.h:777:2: error: #error "This code must be compiled using a 2's complement representation for signed integer values"
In file included from /Applications/MATLAB_R2012b.app/extern/include/matrix.h:294,
                 from /Applications/MATLAB_R2012b.app/extern/include/mex.h:58,
                 from test.c:2:
/Applications/MATLAB_R2012b.app/extern/include/tmwtypes.h:823: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'CHAR16_T'
In file included from /Applications/MATLAB_R2012b.app/extern/include/mex.h:58,
                 from test.c:2:
/Applications/MATLAB_R2012b.app/extern/include/matrix.h:319: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'mxChar'
/Applications/MATLAB_R2012b.app/extern/include/matrix.h:375: error: expected ')' before 'n'
/Applications/MATLAB_R2012b.app/extern/include/matrix.h:383: error: expected ')' before 'n'
/Applications/MATLAB_R2012b.app/extern/include/matrix.h:397: error: expected declaration specifiers or '...' before 'size_t'
/Applications/MATLAB_R2012b.app/extern/include/matrix.h:590: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'mxGetNumberOfElements'
/Applications/MATLAB_R2012b.app/extern/include/matrix.h:632: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token
/Applications/MATLAB_R2012b.app/extern/include/matrix.h:688: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'mxGetM'
/Applications/MATLAB_R2012b.app/extern/include/matrix.h:700: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'mxGetN'
/Applications/MATLAB_R2012b.app/extern/include/matrix.h:750: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'mxGetElementSize'
In file included from /Applications/MATLAB_R2012b.app/extern/include/mex.h:58,
             from test.c:2:
/Applications/MATLAB_R2012b.app/extern/include/matrix.h:851:20: error: stdlib.h: No such file or directory
/Applications/MATLAB_R2012b.app/extern/include/matrix.h:1072: error: expected ')' before 'm'
In file included from test.c:2:
/Applications/MATLAB_R2012b.app/extern/include/mex.h:91: error: expected specifier-qualifier-list before 'size_t'
In file included from test.c:2:
/Applications/MATLAB_R2012b.app/extern/include/mex.h:161:19: error: stdio.h: No such file or directory

    mex: compile of ' "test.c"' failed.

我认为 mex 没有为这些库寻找正确的位置，或者安装以某种方式损坏，但我不知道如何修复它。

Mac OSX Mountain Lion + XCode 4.5.2、Matlab R2012b、gcc 4.2.1

【问题讨论】：

如果你连一个库都不包含，你能编译吗？
如果我不包含任何库，它可以很好地编译，并删除对 mxArray 等特定于 mex 的类型的任何引用。

标签： c matlab mex

【解决方案1】：

包含文件必须在您的 PATH 中（键入 path 以显示这些文件夹），除非您使用 mex -Ipathname。您可以单击“文件->设置路径”并添加包含您的 string.h 的文件夹。

【讨论】：

【解决方案2】：

只是为了分享，我有类似的问题。我正在运行相同版本的 Matlab 并且正在查看此页面但找不到答案。我在这里找到了答案：Matlab 2012a Mex to work with Xcode 4.5 on Mountain Lion

【讨论】：

【解决方案3】：

使用mex 命令指定以下选项，它将正常工作。请确保您在以下文件夹中有标准头文件，否则请相应更新：

mex -I'C:\Program Files (x86)\Windows Kits\10\Include\10.0.10150.0\ucrt'.

如果您克服了这个错误，它也可能会为 .lib 提供帮助。包含类似的内容

mex -I'C:\Program Files (x86)\Windows Kits\10\Include\10.0.10150.0\ucrt' -L'C:\Program Files (x86)\Windows Kits\10\Lib\10.0.10150.0\ucrt\x64'

【讨论】：