如何在可分离编译之后将主机代码与静态CUDA库链接？ [英] How to link host code with a static CUDA library after separable compilation?

问题描述

好吧，我有一个真正令人不安的CUDA 5.0问题，如何正确链接的东西。我真的很感谢任何帮助！

Alright, I have a really troubling CUDA 5.0 question about how to link things properly. I'd be really grateful for any assistance!

使用CUDA 5.0的可分离编译功能，我生成了一个静态库（* .a）。这很好地链接到其他* .cu文件，当运行通过nvcc，我做了这很多次。

Using the separable compilation features of CUDA 5.0, I generated a static library (*.a). This nicely links with other *.cu files when run through nvcc, I have done this many times.

现在我想要一个* .cpp文件和链接它反对主机代码在这个静态库使用g ++或任何，但不是nvcc。如果我尝试这样，我会收到编译器错误，例如

I'd now like to take a *.cpp file and link it against the host code in this static library using g++ or whatever, but not nvcc. If I attempt this, I get compiler errors like

未定义引用__cudaRegisterLinkedBinary

undefined reference to __cudaRegisterLinkedBinary

我使用 -lcuda 和 -lcudart ，具有正确顺序的库（意味着 -lmylib -lcuda -lcudart ）。我不认为这是一个问题。也许我错了，但我觉得我缺少一个步骤，我需要做一些别的我的静态库（设备链接？），我可以使用它与g ++。

I'm using both -lcuda and -lcudart and, to my knowledge, have the libraries in the correct order (meaning -lmylib -lcuda -lcudart). I don't think it is an issue with that. Maybe I'm wrong, but I feel I'm missing a step and that I need to do something else to my static library (device linking?) before I can use it with g++.

我错过了什么关键？这是可能吗？

Have I missed something crucial? Is this even possible?

奖金问题：我想最终结果是一个动态库。

Bonus question: I want the end result to be a dynamic library. How can I achieve this?

推荐答案

当你链接到nvcc时，它与主机链接一起隐式的设备链接。如果你使用主机编译器链接（和g ++一样），那么你需要添加一个显式步骤，使用-dlink选项进行设备链接，例如

When you link with nvcc, it does an implicit device link along with the host link. If you use the host compiler to link (like with g++), then you need to add an explicit step to do a device link with the –dlink option, e.g.

nvcc –arch=sm_35 –dc a.cu b.cu
nvcc –arch=sm_35 –dlink a.o b.o –o dlink.o
g++ a.o b.o dlink.o x.cpp –lcudart

在使用nvcc doc的单独编译章节。

目前我们只支持可重定位设备代码的静态库。我们有兴趣学习如何在动态库中使用这样的代码。请在评论中随意回答。

Currently we only support static libraries for relocatable device code. We’d be interested in learning how you would want to use such code in a dynamic library. Please feel free to answer in the comments.

编辑：

要在下面的评论中回答问题有没有什么办法使用nvcc将mylib.a转换成可以放入g ++的东西？

To answer the question in the comment below " Is there any way to use nvcc to turn mylib.a into something that can be put into g++?"

只需像下面这样使用库： p>

Just use the library like an object, like this:

nvcc –arch=sm_35 –dlink mylib.a –o dlink.o
g++ mylib.a dlink.o x.cpp –lcudart

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