* installing to library ‘/home/hornik/tmp/R.check/r-release-gcc/Work/build/Packages’
* installing *source* package ‘rolog’ ...
** this is package ‘rolog’ version ‘0.9.27’
** package ‘rolog’ successfully unpacked and MD5 sums checked
** using staged installation
** libs
Makevars:11: *** Please install R package rswipl or SWI-Prolog from https://swi-prolog.org....  Stop.
Warning in system(paste(MAKE, p1(paste("-f", shQuote(makefiles))), "compilers"),  :
  running command 'make -f 'Makevars' -f '/home/hornik/tmp/R.check/r-release-gcc/Work/build/etc/Makeconf' -f '/home/hornik/tmp/R.check/r-release-gcc/Work/build/share/make/shlib.mk' -f '/home/hornik/.R/Makevars-gcc' compilers' had status 2
make[1]: Entering directory '/home/hornik/tmp/scratch/Rtmp0rPzOi/R.INSTALLbcb00250a93f8/rolog/src'
Makevars:11: *** Please install R package rswipl or SWI-Prolog from https://swi-prolog.org....  Stop.
make[1]: Leaving directory '/home/hornik/tmp/scratch/Rtmp0rPzOi/R.INSTALLbcb00250a93f8/rolog/src'
ERROR: compilation failed for package ‘rolog’
* removing ‘/home/hornik/tmp/R.check/r-release-gcc/Work/build/Packages/rolog’