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<p>This may already be common knowledge (apologies if it is), but a quick scan of the (recent) email exchanges did not suggest so, and I have come across a number of partial questions and answers on this same topic.<br>
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<p>I have been struggling with an annoying lambda/template bug in gcc 4.6.3 :<br>
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<p><a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53741" id="lnk428503">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53741</a><br>
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<p>so decided to try to update the gcc that is packaged with Rtools to 4.8.1.<br>
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<p><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);">This may assist with Windows users "</span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);">internal
Rcpp projects" -</span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);"> </span>I appreciate package authoring/distribution and CRAN upload concern are more "delicate".<br>
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<p>I did not initially post to Rcpp-devel, as Rtools is a R-devel concern. But in case anyone may find this useful for their Rcpp efforts, here is my post with the method I used:<br>
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<p><a href="http://stackoverflow.com/questions/25455829/using-a-different-gcc-version-from-that-included-with-rtools-with-rcpp-on-window/25456836#25456836" id="NoLP">http://stackoverflow.com/questions/25455829/using-a-different-gcc-version-from-that-included-with-rtools-with-rcpp-on-window/25456836#25456836</a></p>
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<a id="LPImageAnchor_14087561339820.8147574316244572" href="http://stackoverflow.com/questions/25455829/using-a-different-gcc-version-from-that-included-with-rtools-with-rcpp-on-window/25456836#25456836" target="_blank" style="display: table-cell;"><img aria-label="Preview image with link selected. Double-tap to open the link." width="140" height="140" style="display: block; margin-left: auto; margin-right: auto; max-width: 140px; max-height: 140px; height: 140px; width: 140px; border-width: 0px;" src="http://cdn.sstatic.net/stackoverflow/img/apple-touch-icon@2.png?v=fde65a5a78c6"></a></div>
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c++ - Using a different gcc version from that included with Rtools with Rcpp on Windows - Stack Overflow</div>
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Before I embark on updating gcc, has anyone actually attempted this, and can they confirm building R from source is required to update the gcc version one uses to compile c++ code with Rcpp (i.e. not
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