OpenCL:标头文件的其他目录 [英] OpenCL: Additional directories for header files

问题描述

OpenCL规范写在 5.6.3构建选项中:

The OpenCL specification writes in 5.6.3 Build Options:

...  
-I dir  
    Add the directory dir to the list of directories to be searched  
    for header files.

有人可以解释一下这是什么意思吗?据我所知，您无法将头文件包含到OpenCL内核中.那么，这个选项有什么用呢?

Can someone please explain what that means? As far as I know you cannot inlcude header files into your OpenCL kernels. So what could this options be for?

链接到OpenCL规范: http://www. khronos.org/registry/cl/specs/opencl-1.1.pdf

Link to the OpenCL spec: http://www.khronos.org/registry/cl/specs/opencl-1.1.pdf

我在错误的假设下，不允许将头文件包含在OpenCL内核中.现在，我有了jHackTheRipper的帮助.

I was under the wrong assumption that it is not allowed to include header files into ones OpenCL kernel. Now I know better, thanks to jHackTheRipper.

推荐答案

它允许您添加一些包含标头文件的目录，这些目录不在标准的include-search路径中.这样，您可以告诉编译器那些特定的头文件在系统上的位置.

It allows you to add some directories containing header files which are not in the standard include-search path. This way you can tell the compiler where those particular header files are located on your system.

例如，假设文件foo.h不在标准的include路径中(在Unix系统中通常为/usr/include)，但是在/home/foo/my_headers/foo.h中，您可以要求编译器搜索/home/foo/my_headers通过执行以下操作来获取头文件:

For instance, suppose the file foo.h is not in the standard include path (commonly /usr/include on a Unix system), but rather in /home/foo/my_headers/foo.h, you can ask the compiler to search /home/foo/my_headers for header files by doing:

g++ -I/home/foo/my_headers foo.c -o foo

为完整起见，本节的标题引入了预处理器一词，这是在编译器之前调用的程序，用于将所有#something指令替换为它们的等价物. #include <foo.h>将替换为foo.h文件的内容.

To be complete, the section title introduce the word preprocessor which is the program called before the compiler to replace all #something directives by their equivalent. #include <foo.h> will be replaced by the content of the foo.h file.

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