Found the following significant warnings:
  check_input.c:132:25: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
  check_input.c:135:25: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
  check_input.c:138:25: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
  check_input.c:141:25: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
  check_input.c:144:25: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
  check_input.c:147:25: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
  cpi.c:241:15: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
  cpi.c:241:27: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
  cpi.c:259:37: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
  errif.c:12:15: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
  errif.c:12:31: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
  minmaxDate.c:112:22: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
  minmaxDate.c:115:22: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
  minmaxDate.c:125:22: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
  minmaxDate.c:128:22: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
  minmaxDate.c:165:20: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
  minmaxDate.c:169:20: warning: format specifies type 'long long' but the argument has type 'R_xlen_t' (aka 'long') [-Wformat]
See ‘/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/grattanInflators.Rcheck/00install.out’ for details.
* used C compiler: ‘Debian clang version 17.0.5 (1)’