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The minimum ‘autoconf’ requirement for a maintainer build has been increased to ‘autoconf’ 2.71.
It is intended to increase this to 2.72 for R 4.5.0: the distributed ‘configure’ file was generated using 2.72.
Internal Mathlib function ‘stirlerr(n)’ is now almost fully (52-bit) accurate for all n >= ~5.9 and more accurate also in the range 1 -- 5.9. This entails small (“after 12th decimal”) changes in density functions, e.g., ‘dgamma()’ in _some_ regions of their support. The fix was partly prompted by \IMorten Welinder's PR#18640.