包含Rcpp.h时未定义的引用错误 [英] Undefined reference errors when including Rcpp.h

问题描述

我使用的是64位Ubuntu，我正在尝试编写C ++。

我发现如果使用 #include ，我甚至不需要致电在R命名空间中的任何函数，并且我已经收到未激活的引用错误：

  obj / xo：在函数`Rcpp :: Rstreambuf< true> :: xsputn（char const *，long）'：
 /usr/local/lib/R/site-library/Rcpp/include/Rcpp/iostream/Rstreambuf.h:61：undefined reference to `Rprintf'
 obj / xo：函数`Rcpp :: Rstreambuf< false> :: xsputn（char const *，long）'：
 / usr / local / lib / R / site-library / Rcpp / include / Rcpp / iostream / Rstreambuf.h：65：未定义引用'REprintf'
 obj / xo：在函数`Rcpp :: Rstreambuf< true> :: overflow（int）'中：
 /usr/local/lib/R/site-library/Rcpp/include/Rcpp/iostream/Rstreambuf.h:70：对'Rprintf'
 obj / xo的未定义引用：函数`Rcpp :: Rstreambuf > ; :: overflow（int）'：
 /usr/local/lib/R/site-library/Rcpp/include/Rcpp/iostream/Rstreambuf.h:74：未定义的引用'REprintf 
 obj / xo：函数`Rcpp :: Rstreambuf< true> :: sync（）'：
 / usr / local / lib / R / site-library / Rcpp / include / Rcpp / iostream /在函数`Rcpp :: Rstreambuf< false> :: sync（）'中：
 / usr / local / lib / R / site-library / Rcpp / include / Rcpp / iostream / Rstreambuf.h：83：对`R_FlushConsole'
  

的未定义引用

我已经安装了r-base和r-base-dev。我通过以root身份运行R来安装Rcpp，并执行了 install.package（Rcpp）

使用g ++与 -I / usr / local / lib / R / site-library / Rcpp / include

我在这里错过了什么？感谢您的回复。

解决方案

只要拉 Rcpp 标题是不够的。您还需要R标头并链接到R的库。您可以使用例如 R CMD SHLIB 为您做到这一点。

然而，我建议你：

• 创建一个包有 LinkingTo：Rcpp 等...（请参阅Rcpp的文档）。


• 在 .cpp 文件中使用 sourceCpp 。请参阅？sourceCpp

I am using 64bit Ubuntu, and I am trying to write C++.

I discovered if I use #include <Rcpp.h>, I don't even need to call any functions in the R namespace, and I would already receive undefired reference errors:

obj/x.o: In function `Rcpp::Rstreambuf<true>::xsputn(char const*, long)':
/usr/local/lib/R/site-library/Rcpp/include/Rcpp/iostream/Rstreambuf.h:61: undefined reference to `Rprintf'
obj/x.o: In function `Rcpp::Rstreambuf<false>::xsputn(char const*, long)':
/usr/local/lib/R/site-library/Rcpp/include/Rcpp/iostream/Rstreambuf.h:65: undefined reference to `REprintf'
obj/x.o: In function `Rcpp::Rstreambuf<true>::overflow(int)':
/usr/local/lib/R/site-library/Rcpp/include/Rcpp/iostream/Rstreambuf.h:70: undefined reference to `Rprintf'
obj/x.o: In function `Rcpp::Rstreambuf<false>::overflow(int)':
/usr/local/lib/R/site-library/Rcpp/include/Rcpp/iostream/Rstreambuf.h:74: undefined reference to `REprintf'
obj/x.o: In function `Rcpp::Rstreambuf<true>::sync()':
/usr/local/lib/R/site-library/Rcpp/include/Rcpp/iostream/Rstreambuf.h:79: undefined reference to `R_FlushConsole'
obj/x.o: In function `Rcpp::Rstreambuf<false>::sync()':
/usr/local/lib/R/site-library/Rcpp/include/Rcpp/iostream/Rstreambuf.h:83: undefined reference to `R_FlushConsole'

I have installed r-base and r-base-dev. I installed Rcpp by running R as root and did a install.package("Rcpp")

I compile the C++ program using g++ with -I/usr/local/lib/R/site-library/Rcpp/include

What am I missing here? Thanks for any replies.

解决方案

Just pulling Rcpp headers is not enough. You also need R headers and linking against R's library. You could use e.g. R CMD SHLIB to do this for you.

However, I'd suggest you either:

• create a package that has LinkingTo: Rcpp etc ... (see Rcpp's documentation).
• use sourceCpp on your .cpp file. See ?sourceCpp

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