Found the following significant warnings:
  brekfis.c:154:49: warning: format '%lu' expects argument of type 'long unsigned int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  brekfis.c:154:49: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  brekfis.c:154:49: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  brekfis.c:295:29: warning: format '%lu' expects argument of type 'long unsigned int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ekf.c:140:25: warning: format '%lu' expects argument of type 'long unsigned int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ekf.c:232:33: warning: format '%lu' expects argument of type 'long unsigned int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ekf.c:295:25: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ekf.c:306:25: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ekf.c:338:33: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ekf.c:340:33: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ekf.c:343:33: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  ekf.c:348:33: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
See 'd:/Rcompile/CRANpkg/local/4.4/dynr.Rcheck/00install.out' for details.
* used C compiler: 'gcc.exe (GCC) 12.3.0'