rcpp sourceCpp 编译器设置 [英] Rcpp sourceCpp compiler settings

问题描述

我正在使用 Rcpp 来加速一个在 R(3.4、Windows7)中被重复调用的函数，我希望更改编译器设置.

I am using Rcpp to speed up a function that gets called repeatedly in R (3.4, Windows7) and I was hoping to change the compiler settings.

当我打电话时:sourceCpp("scoreseq1.1.cc", verbose=TRUE)

部分输出如下:

C:/RBuildTools/3.4/mingw_64/bin/g++ -I"C:/PROGRA~1/R/R-34~1.1/include" -O2 -Wall -mtune=core2 -c scoreeq1.1.cc-o scoreeq1.1.o

C:/RBuildTools/3.4/mingw_64/bin/g++ -I"C:/PROGRA~1/R/R-34~1.1/include" -O2 -Wall -mtune=core2 -c scoreseq1.1.cc -o scoreseq1.1.o

我想将 -mtune 更改为 haswell，将 -O2 更改为 -O3 以搜索一些性能改进.

I would like to change -mtune to haswell, and -O2 to -O3 in search of some performance improvements.

有没有办法通过 sourceCpp 或 cppFunction 做到这一点，我是否需要在 my.cc 文件中添加一个特殊的头文件，或者我需要修改我系统上的一些文件(如果是的话，是什么文件?！)

Is there a way to do that through the sourceCpp or cppFunction, do I need a special header in my.cc file, or do I need to I need to modify some file on my system (and if so, what file?!)

谢谢！

推荐答案

不，你不能(很容易)，而且通常不能来自函数.

No, you can't (easily), and in general not from a function.

这些设置从 R 本身的构建开始就固定"了.您可以编辑该文件——但每次重新构建/重新安装 R 时都必须这样做.

These settings are "fixed" from when R itself is built. You can edit the file -- but you will have to so each time R is rebuilt / reinstalled.

在我的盒子上，文件是 $(R RHOME)/etc/Makeconf.

On my box the file is $(R RHOME)/etc/Makeconf.

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