Question

我正在尝试构建一个需要可移植的R包（即能够安装在其他计算机上）。我正在使用一些C代码（使用.C()调用）构建包，并使用gsl库。

当我尝试使用R CMD BUILD构建程序包时，我收到一条错误消息，指出程序包或命名空间无法加载，因为它无法加载共享对象。下面我做了一个简单的玩具示例来重现我得到的错误。

myran.R文件：

myran <- function(){
  a <- 1.1
  nothing <- .C("myran",as.double(a))
  return(nothing[[1]])
}

myran.C文件：

#include <stdio.h>
#include <time.h>
#include <gsl/gsl_rng.h>
#include <gsl/gsl_randist.h>

void myran(double * a){
  const gsl_rng * r = gsl_rng_alloc(gsl_rng_mt19937);
  unsigned long int theseed;
  theseed = time(NULL);
  gsl_rng_set(r,theseed);
  *a = gsl_ran_flat(r,0,1);
}

NAMESPACE文件：

exportPattern("^[[:alpha:]]+")
useDynLib(myran)
export(myran)

然后我运行R CMD BUILD myran并获得以下输出：

* checking for file ‘myran/DESCRIPTION’ ... OK
* preparing ‘myran’:
* checking DESCRIPTION meta-information ... OK
* cleaning src
* installing the package to process help pages
      -----------------------------------
* installing *source* package ‘myran’ ...
** libs
/usr/bin/cc -I/opt/local/Library/Frameworks/R.framework/Resources/include -DNDEBUG   -I/opt/local/include   -fPIC  -pipe -Os -m64  -c myran.c -o myran.o
/usr/bin/cc -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -single_module -multiply_defined suppress -L/opt/local/Library/Frameworks/R.framework/Resources/lib -L/opt/local/lib -Wl,-headerpad_max_install_names -o myran.so myran.o -F/opt/local/Library/Frameworks/R.framework/.. -framework R -Wl,-framework -Wl,CoreFoundation
installing to /private/var/folders/8y/f4_br32s1xn2d3rq2pswrtyr0000gw/T/RtmpIBvMbd/Rinst93381cca4b71/myran/libs
** R
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded
Error: package or namespace load failed for ‘myran’ in dyn.load(file, DLLpath = DLLpath, ...):
 unable to load shared object '/private/var/folders/8y/f4_br32s1xn2d3rq2pswrtyr0000gw/T/RtmpIBvMbd/Rinst93381cca4b71/myran/libs/myran.so':
  dlopen(/private/var/folders/8y/f4_br32s1xn2d3rq2pswrtyr0000gw/T/RtmpIBvMbd/Rinst93381cca4b71/myran/libs/myran.so, 6): Symbol not found: _gsl_rng_mt19937
  Referenced from: /private/var/folders/8y/f4_br32s1xn2d3rq2pswrtyr0000gw/T/RtmpIBvMbd/Rinst93381cca4b71/myran/libs/myran.so
  Expected in: flat namespace
 in /private/var/folders/8y/f4_br32s1xn2d3rq2pswrtyr0000gw/T/RtmpIBvMbd/Rinst93381cca4b71/myran/libs/myran.so
Error: loading failed
Execution halted
ERROR: loading failed
* removing ‘/private/var/folders/8y/f4_br32s1xn2d3rq2pswrtyr0000gw/T/RtmpIBvMbd/Rinst93381cca4b71/myran’
      -----------------------------------
ERROR: package installation failed

我需要更改哪些内容才能正确构建此程序包，使其可以移植并可以安装在其他计算机上？

如何在R包中使用GSL库？

0 个答案: