Found the following significant warnings:
  ../inst/include/ring/ring.c:560:42: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ../inst/include/ring/ring.c:560:59: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ring_r.c:139:37: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ring_r.c:139:69: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ring_r.c:235:64: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ring_r.c:235:70: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ring_r.c:252:66: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ring_r.c:252:72: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ring_r.c:255:64: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ring_r.c:255:70: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ring_r.c:268:37: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ring_r.c:268:65: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ring_r.c:359:42: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ring_r.c:359:58: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
See 'd:/Rcompile/CRANpkg/local/4.4/ring.Rcheck/00install.out' for details.
* used C compiler: 'gcc.exe (GCC) 12.3.0'