remove Rcpp:::CxxFlags and Rcpp:::LdFlags() in Makevar

[cpanse]

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To: Jose Francisco Loff <jfloff@phistat.com>, Philip Rinn
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CC: CRAN <CRAN@r-project.org>
Reply-To: CRAN <CRAN@r-project.org>
From: Prof Brian Ripley <ripley@stats.ox.ac.uk>
Subject: CRAN packages using Rcpp:::CxxFlags
Message-ID: <bee18bc9-7c72-e14d-9226-0b0731c074e5@stats.ox.ac.uk>
Date: Sun, 23 Dec 2018 08:59:58 +0000
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For years the recommended way to link to Rcpp has been

LinkingTo: Rcpp

in the DESCRIPTION file, and using Rcpp:::CxxFlags has been unnecessary. 
Yet packages

     ALKr Langevin PAC Rsomoclu bfp climdex.pcic dynsbm geiger protViz

still do so.  Please remove it, and any use of Rcpp:::LdFlags().

Please do so before Jan 16 to safely retain the package on CRAN.

-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Emeritus Professor of Applied Statistics, University of Oxford

[cpanse]

https://cran.r-project.org/doc/manuals/r-release/R-exts.html