Question

我需要一些帮助来构建链接到NLopt库（http://ab-initio.mit.edu/wiki/index.php/NLopt）的Rcpp包。

我在Windows上使用RStudio的'Build＆amp;重新加载”。

我在包的\ src文件夹中有以下文件：

\ SRC
- Makevars.in
- Makevars.win
- RcppExports.cpp
- nlopt.h
- nlopt.hpp
- libnlopt.lib
- libnlopt.def
- libnlopt.a
- libnlopt.dll

我已经将.lib（使用MinGW构建）和NLOpt的dll文件复制到\ src文件夹中，希望R能够自己编译它们。但是，情况似乎并非如此，因此我添加了一个Makevars文件，我尝试链接到库。

从RStudio运行时，我收到以下错误消息，我想，它告诉我链接（参见“未定义的引用”）与NLop库存在问题：

安装到库'C：/Users/g49128/Documents/R/win-library/3.2'

安装源包'NewPackage'......   ** libs

g ++ -m64 -shared -s -static-libgcc -o NewPackage.dll tmp.def RcppExports.o Rcpp_project_test.o -Lc：/Temp/R/Rcpp/NewPackage/src/libnlopt.a -Lc：/ applications / extsoft / lib / x64 -Lc：/ applications / extsoft / lib -LC：/PROGRA~1/R/R-32~1.2/bin/x64 -lR   Rcpp_project_test.o:Rcpp_project_test.cpp :(。text + 0x73c）：对__imp_nlopt_create 的未定义引用

所以我怀疑我没有让Makevars合适，不太熟悉那些。

通过咨询几个CRAN软件包，特别是nloptr，我目前对Makevars文件内容的最佳猜测是：

NLOPT_HOME = c：/ Temp / R / Rcpp / NewPackage / src。

KG_CFLAGS = -I“$（NLOPT_HOME）”

PKG_LIBS = -L“$（NLOPT_HOME）/llnlopt.a”

其中'libnlopt.a'是库，环境变量'NLOPT_HOME'包含库的路径。

谁能告诉我这里缺少什么？非常感谢任何帮助，谢谢。

Answer 1

nloptr包本身可以做到这一点。它使用以下Makevars.win：

# Copyright (C) 2010 Jelmer Ypma. All Rights Reserved.
# This code is published under the L-GPL.
#
# File:   Makevars.win
# Author: Jelmer Ypma
# Date:   18 August 2010
#
# 09 June 2011: Windows support added thanks to Stefan Theussl and Uwe Ligges.
#               NLOPT_HOME is the directory where a working installation of 
#               NLopt is located (within subdirectories NLOPT_VERSION/R_ARCH)
# 18 November 2011: Removed NLOPT_VERSION macro and adopted some other changes
#                   proposed by Brian Ripley to make nloptr work with his new toolchain.
#                   NLopt should now be located in NLOPT_HOME/R_ARCH (i.e. without
#                   version number)
# 19 February 2013: NLopt is compiled with --with-cxx option, in order to include
#                   the StoGo algorithm. This means that we now need to link to 
#                   with -lnlopt_cxx and also link to the c++ library, -lstdc++.
# 7 November 2013: Changed PKG_CPPFLAGS to PKG_CFLAGS.
# 2 May 2014: Added quotes around include paths to allow for spaces in NLOPT_HOME.

# C Compiler options
PKG_CFLAGS = -I"$(NLOPT_HOME)$(R_ARCH)/include"
PKG_LIBS = -L"$(NLOPT_HOME)$(R_ARCH)/lib" -lnlopt_cxx

要求您拥有正确的NLOPT_HOME变量集。

您有时可以从CRAN支持网站下载相应的预建库，但我在此处没有看到。

Rcpp链接到外部库（NLopt）

1 个答案: