我们是一个致力于包含 C/C++ 代码的 R 包的团队。该软件包可以成功安装在除一台机器之外的所有机器上。这些都运行相同版本的 Mac OS X。我提供了在我的计算机（成功）和同事的计算机（错误）上安装软件包的日志文件。该包依赖于 Rcpp 包和 GSL 库，两者均已成功安装在两台机器上。
我的电脑
WARNING: ignoring environment value of R_HOME
* installing to library '/Users/dejayn/R/x86_64-apple-darwin10.8.0-library/2.15'
* installing *source* package 'mrenci' ...
** libs
*** arch - x86_64
/opt/local/bin/g++-mp-4.5 -I/opt/local/lib/R/include -I/opt/local/lib/R/include/x86_64 -DNDEBUG -fopenmp -fopenmp -I/opt/local/include -I"/Users/dejayn/R/x86_64-apple-darwin10.8.0-library/2.15/Rcpp/include" -fPIC -pipe -O2 -m64 -c MRMRTree.cc -o MRMRTree.o
/opt/local/bin/g++-mp-4.5 -I/opt/local/lib/R/include -I/opt/local/lib/R/include/x86_64 -DNDEBUG -fopenmp -fopenmp -I/opt/local/include -I"/Users/dejayn/R/x86_64-apple-darwin10.8.0-library/2.15/Rcpp/include" -fPIC -pipe -O2 -m64 -c Matrix.cc -o Matrix.o
/opt/local/bin/g++-mp-4.5 -I/opt/local/lib/R/include -I/opt/local/lib/R/include/x86_64 -DNDEBUG -fopenmp -fopenmp -I/opt/local/include -I"/Users/dejayn/R/x86_64-apple-darwin10.8.0-library/2.15/Rcpp/include" -fPIC -pipe -O2 -m64 -c MiMBuilder.cc -o MiMBuilder.o
/opt/local/bin/g++-mp-4.5 -I/opt/local/lib/R/include -I/opt/local/lib/R/include/x86_64 -DNDEBUG -fopenmp -fopenmp -I/opt/local/include -I"/Users/dejayn/R/x86_64-apple-darwin10.8.0-library/2.15/Rcpp/include" -fPIC -pipe -O2 -m64 -c SymmetricMatrix.cc -o SymmetricMatrix.o
/opt/local/bin/g++-mp-4.5 -I/opt/local/lib/R/include -I/opt/local/lib/R/include/x86_64 -DNDEBUG -fopenmp -fopenmp -I/opt/local/include -I"/Users/dejayn/R/x86_64-apple-darwin10.8.0-library/2.15/Rcpp/include" -fPIC -pipe -O2 -m64 -c adaptor.cc -o adaptor.o
/opt/local/bin/g++-mp-4.5 -I/opt/local/lib/R/include -I/opt/local/lib/R/include/x86_64 -DNDEBUG -fopenmp -fopenmp -I/opt/local/include -I"/Users/dejayn/R/x86_64-apple-darwin10.8.0-library/2.15/Rcpp/include" -fPIC -pipe -O2 -m64 -c memory.cc -o memory.o
/opt/local/bin/g++-mp-4.5 -I/opt/local/lib/R/include -I/opt/local/lib/R/include/x86_64 -DNDEBUG -fopenmp -fopenmp -I/opt/local/include -I"/Users/dejayn/R/x86_64-apple-darwin10.8.0-library/2.15/Rcpp/include" -fPIC -pipe -O2 -m64 -c tools.cc -o tools.o
/opt/local/bin/g++-mp-4.5 -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -single_module -multiply_defined suppress -L/opt/local/lib -o mrenci.so MRMRTree.o Matrix.o MiMBuilder.o SymmetricMatrix.o adaptor.o memory.o tools.o /Users/dejayn/R/x86_64-apple-darwin10.8.0-library/2.15/Rcpp/lib/x86_64/libRcpp.a -fopenmp -fopenmp -L/opt/local/lib/R/lib/x86_64 -lR
installing to /Users/dejayn/R/x86_64-apple-darwin10.8.0-library/2.15/mrenci/libs/x86_64
** R
** preparing package for lazy loading
** testing if installed package can be loaded
* DONE (mrenci)
同事的电脑
WARNING: ignoring environment value of R_HOME
* installing to library '/Library/Frameworks/R.framework/Versions/2.15/Resources/library'
* installing *source* package 'mrenci' ...
** libs
*** arch - x86_64
g++ -arch x86_64 -I/Library/Frameworks/R.framework/Resources/include -I/Library/Frameworks/R.framework/Resources/include/x86_64 -DNDEBUG -fopenmp -I/usr/local/include -I"/Library/Frameworks/R.framework/Versions/2.15/Resources/library/Rcpp/include" -fPIC -g -O2 -c MRMRTree.cc -o MRMRTree.o
MRMRTree.cc: In member function 'double* const MRMRTree::bootstrap(unsigned int)':
MRMRTree.cc:73: warning: iteration variable 'i' is unsigned
g++ -arch x86_64 -I/Library/Frameworks/R.framework/Resources/include -I/Library/Frameworks/R.framework/Resources/include/x86_64 -DNDEBUG -fopenmp -I/usr/local/include -I"/Library/Frameworks/R.framework/Versions/2.15/Resources/library/Rcpp/include" -fPIC -g -O2 -c Matrix.cc -o Matrix.o
g++ -arch x86_64 -I/Library/Frameworks/R.framework/Resources/include -I/Library/Frameworks/R.framework/Resources/include/x86_64 -DNDEBUG -fopenmp -I/usr/local/include -I"/Library/Frameworks/R.framework/Versions/2.15/Resources/library/Rcpp/include" -fPIC -g -O2 -c MiMBuilder.cc -o MiMBuilder.o
MiMBuilder.cc: In member function 'Matrix* const MiMBuilder::createMiM(unsigned int*, unsigned int, unsigned int*, unsigned int)':
MiMBuilder.cc:102: warning: iteration variable 'i' is unsigned
g++ -arch x86_64 -I/Library/Frameworks/R.framework/Resources/include -I/Library/Frameworks/R.framework/Resources/include/x86_64 -DNDEBUG -fopenmp -I/usr/local/include -I"/Library/Frameworks/R.framework/Versions/2.15/Resources/library/Rcpp/include" -fPIC -g -O2 -c SymmetricMatrix.cc -o SymmetricMatrix.o
g++ -arch x86_64 -I/Library/Frameworks/R.framework/Resources/include -I/Library/Frameworks/R.framework/Resources/include/x86_64 -DNDEBUG -fopenmp -I/usr/local/include -I"/Library/Frameworks/R.framework/Versions/2.15/Resources/library/Rcpp/include" -fPIC -g -O2 -c adaptor.cc -o adaptor.o
g++ -arch x86_64 -I/Library/Frameworks/R.framework/Resources/include -I/Library/Frameworks/R.framework/Resources/include/x86_64 -DNDEBUG -fopenmp -I/usr/local/include -I"/Library/Frameworks/R.framework/Versions/2.15/Resources/library/Rcpp/include" -fPIC -g -O2 -c memory.cc -o memory.o
g++ -arch x86_64 -I/Library/Frameworks/R.framework/Resources/include -I/Library/Frameworks/R.framework/Resources/include/x86_64 -DNDEBUG -fopenmp -I/usr/local/include -I"/Library/Frameworks/R.framework/Versions/2.15/Resources/library/Rcpp/include" -fPIC -g -O2 -c tools.cc -o tools.o
g++ -arch x86_64 -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -single_module -multiply_defined suppress -L/usr/local/lib -o mrenci.so MRMRTree.o Matrix.o MiMBuilder.o SymmetricMatrix.o adaptor.o memory.o tools.o /Library/Frameworks/R.framework/Versions/2.15/Resources/library/Rcpp/lib/x86_64/libRcpp.a -F/Library/Frameworks/R.framework/.. -framework R -Wl,-framework -Wl,CoreFoundation
installing to /Library/Frameworks/R.framework/Versions/2.15/Resources/library/mrenci/libs/x86_64
** R
** preparing package for lazy loading
** testing if installed package can be loaded
Error in dyn.load(file, DLLpath = DLLpath, ...) :
unable to load shared object '/Library/Frameworks/R.framework/Versions/2.15/Resources/library/mrenci/libs/x86_64/mrenci.so':
dlopen(/Library/Frameworks/R.framework/Versions/2.15/Resources/library/mrenci/libs/x86_64/mrenci.so, 6): Symbol not found: _GOMP_critical_name_end
Referenced from: /Library/Frameworks/R.framework/Versions/2.15/Resources/library/mrenci/libs/x86_64/mrenci.so
Expected in: flat namespace
in /Library/Frameworks/R.framework/Versions/2.15/Resources/library/mrenci/libs/x86_64/mrenci.so
Error: loading failed
Execution halted
ERROR: loading failed
* removing '/Library/Frameworks/R.framework/Versions/2.15/Resources/library/mrenci'
起初，在我同事的计算机上安装会导致编译两种架构的包，g++ 抱怨一个未知的-arch参数。然而，这个问题似乎已经通过强制针对单一架构而得到缓解x86_64。还值得注意的是，由于这些错误，所有计算机现在都有多个版本的 R 和 g++。这是链接器的问题吗？R 及其包是否需要使用相同的编译器？就我的电脑而言，我从未明确要求g++-mp-4.5使用而不是默认的 g++（4.2 版），所以我认为 R 会自动检测到它。
如果这有任何帮助，这是我的 Makevars 包含的内容：
PKG_LIBS=`$(R_HOME)/bin/Rscript -e "Rcpp:::LdFlags()"` $(SHLIB_OPENMP_CFLAGS) -fopenmp
PKG_CPPFLAGS=$(SHLIB_OPENMP_CXXFLAGS) -fopenmp
PKG_CFLAGS=$(SHLIB_OPENMP_CFLAGS) -fopenmp
这些$(SHLIB_OPENMP_*FLAGS)标志似乎只在我的电脑上定义；-fopenmp为包显式添加了标志以在所有机器上工作。
有没有人遇到过类似的问题？任何帮助，将不胜感激。