c++ - Increase Rcpp compile speed -

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i using rcpp write r package, uses c++ code, each time r cmd build <package name>, needs long time compile whole packages, since there couple of cpp files. there way can compile changed files/new files, instead of recompiling everything? thank much!

i have makevars file this:

pkg_cxxflags=-std=gnu++11  pkg_libs=-l. -lall

the best trick know deploy awesome frontend ccache linux distros have, , os x has (in brew iirc). can used both g++ , clang.

so in ~/.r/makevars have

ver= ccache=ccache cc=$(ccache) gcc$(ver) cxx=$(ccache) g++$(ver) shlib_cxxld=g++$(ver) fc=ccache gfortran$(ver) #fc=gfortran f77=$(ccache) gfortran$(ver)

where ver empty 4.9 default. if re-build same package on , over, compile-time fast unchanged code leads object files being retrieved.


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