RcppArmadillo 15.0.1-1 with Armadillo 15.0.1 (and Armadillo 14.6.3 under C++11) #473
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Adds fallback compilation using 14.6.2 installed in inst/include/legacy/ otherwise current version is used (requiring C++14 or newer) from inst/include/current
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Closes #471
Closes #474
As described in #471, Armadillo upstream switched to C++14.
That is not viable at CRAN as minimal compilation standard as well over 200 packages explicitly set C++11 and need to switched over time. So as a transition, we also include the (most recent) version of the 14.6.* branch, currently 14.6.3, as a fallback that is used if C++11 compilation is detected.
That scheme has been tested across multiple rounds of reverse dependencies and works. 1 2
Footnotes
We see one regression in one package (also seen with another compiler at CRAN) that appears fully unrelated to the Armadillo changes, but possibly related to C++14. We contacted upstream as we think the issue it at their end and plan to convince CRAN that this not a regression, ↩
The regression revealed a real bug (noted in Regression with Armadillo 15.0.0 -- and 14.6.* under Intel #474) leading to release 15.0.1. Yay for reverse-dependency checks. ↩