* using log directory ‘/home/hornik/tmp/CRAN_special_gcc-san/sf.Rcheck’
* using R Under development (unstable) (2025-05-13 r88200)
* using platform: x86_64-pc-linux-gnu
* R was compiled by
    gcc-14 (Debian 14.2.0-19) 14.2.0
    GNU Fortran (Debian 14.2.0-19) 14.2.0
* running under: Debian GNU/Linux trixie/sid
* using session charset: UTF-8
* checking for file ‘sf/DESCRIPTION’ ... OK
* this is package ‘sf’ version ‘1.0-21’
* package encoding: UTF-8
* checking package namespace information ... OK
* checking package dependencies ... ERROR
Package required but not available: ‘s2’

Packages suggested but not available for checking:
  'lwgeom', 'mapview', 'stars', 'tmap'

See section ‘The DESCRIPTION file’ in the ‘Writing R Extensions’
manual.
* DONE
Status: 1 ERROR