remove _R_CXX_USE_NO_REMAP_, as presaged in NEWS

git-svn-id: https://svn.r-project.org/R/trunk@87694 00db46b3-68df-0310-9c12-caf00c1e9a41

doc/NEWS.Rd

@@ -374,11 +374,8 @@
 
   \subsection{UTILITIES}{
     \itemize{
-      \item \command{R CMD INSTALL} (and hence \command{check}) now by
-      default compile C++ code with \code{-DR_NO_REMAP}.  For the time
-      being this can be reverted by setting environment
-      variable \env{_R_CXX_USE_NO_REMAP_} to a false value (but that will
-      be removed in the near future).
+      \item \command{R CMD INSTALL} (and hence \command{check}) now
+      compile C++ code with \code{-DR_NO_REMAP}.
 
       \sQuote{Writing R Extensions} has been revised to describe the remapped
       entry points, for with the \code{Rf_} prefix remains optional when

src/library/tools/R/install.R

@@ -2767,8 +2767,8 @@ if(FALSE) {
                         paste0("LTO_FC=", shQuote("$(LTO_FC_OPT)")))
                   else if(isFALSE(use_lto)) c("LTO=", "LTO_FC=")
                   )
-    if(config_val_to_logical(Sys.getenv("_R_CXX_USE_NO_REMAP_", "TRUE")))
-         makeargs <- c(makeargs, "CXX_DEFS=-DR_NO_REMAP")
+    ## if(config_val_to_logical(Sys.getenv("_R_CXX_USE_NO_REMAP_", "TRUE")))
+    ##      makeargs <- c(makeargs, "CXX_DEFS=-DR_NO_REMAP")
 ##    if(config_val_to_logical(Sys.getenv("_R_USE_STRICT_R_HEADERS_", "FALSE")))
 ##         makeargs <- c(makeargs, "XDEFS=-DSTRICT_R_HEADERS=1")