[Rd] Detect UCRT-built R from within R sessions (and in configure.win)

Hiroaki Yutani yut@n|@|n| @end|ng |rom gm@||@com
Wed Sep 8 14:08:40 CEST 2021


Are there any proper ways to know whether the session is running on
the R that is built with the UCRT toolchain or not? Checking if the
encoding is UTF-8 might do the trick, but I'm not sure if it's always

Also, I'd like to know if there's any mechanism to detect the UCRT in
configure.win. I know there are Makevars.ucrt and Makefile.ucrt, but
one might want to do some feature test that is specific to the UCRT

Hiroaki Yutani

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