尝试使用该RcppEigen软件包时遇到了一些麻烦。我使用了此处发布的示例。该函数有效，但是R生成了一系列类似的警告（如下示例）。
In file included from example.cpp:1:
In file included from /Users/nguy2338/Library/R/3.4/library/RcppEigen/include/RcppEigen.h:25:
In file included from /Users/nguy2338/Library/R/3.4/library/RcppEigen/include/RcppEigenForward.h:30:
In file included from /Users/nguy2338/Library/R/3.4/library/RcppEigen/include/Eigen/Dense:1:
In file included from /Users/nguy2338/Library/R/3.4/library/RcppEigen/include/Eigen/Core:531:
/Users/nguy2338/Library/R/3.4/library/RcppEigen/include/Eigen/src/Core/util/ReenableStupidWarnings.h:10:30: warning: pragma diagnostic pop could not pop, no matching push [-Wunknown-pragmas]
#pragma clang diagnostic pop
那么，这些警告是什么意思，我应该如何处理这些警告？