在R包加载已编译的库
问题说明
我正在编写一个R包，其中需要将一个已编译的库文件qserver.dll包含在内，并在将该包加载到R到整个库(myPackage)中时dym.load.该qserver.dll由第三方供应商提供，所以我没有源代码.
I am writing an R package where I need to include a compiled library file qserver.dll and dym.load it when the package is loaded in R throught library(myPackage). This qserver.dll is provided by a third party vendor so I don't have the source code.
我在互联网上做了一些研究，但是信息很少.到目前为止，我发现我应该将此文件放在包文件夹的inst/子目录中.但是，在编写程序包时如何确定该文件的路径，以便可以编写类似
I did some research on the internet but information is rare. What I have found so far is that I should put this file in the to inst/ subdirectory of my package folder. However, how I can determine the path to this file when writing the package so I can write something like
dyn.load("path/to/file/qserver.dll")
编写程序包时.非常感谢.
when writing the package. Thanks very much.
正确答案
可通过以下方式使用包的inst目录中的项目:
Items in the inst directory of a package are made available through
system.file(..., package=<mypkg>)
因此，假设您在包路径<pkg>/inst/lib/qserver.dll中包含了.dll，则可以
so assuming you had that .dll in a package path <pkg>/inst/lib/qserver.dll, you can do
system.file("lib/qserver.dll", package=<mypkg>)
获取文件位置.
现在，当然，这是CRAN不能接受的，并且 CRAN储存库政策对此很清楚.因此，如果您确实需要qserver.dll，则要么需要找到源代码，要么考虑使用其他分发途径.
Now, of course, this is not CRAN acceptable, and the CRAN Repository Policy is quite clear on this. So if you really need qserver.dll, either you need to find the source code, or consider a different route for distribution.
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