Found the following significant warnings:
  cnft2.h:285:17: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  cnft2.h:286:22: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  cnft2.h:286:27: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  cnft2.h:295:19: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  cnft2.h:305:36: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  cnft2.h:306:40: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  cnft2.h:310:28: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  cnft2.h:311:27: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  cnft2.h:312:22: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  cnft2.h:313:26: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  cnft2.h:318:28: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'int' [-Wformat=]
  cnft2.h:332:53: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  cnft2.h:333:57: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'size_t' {aka 'long long unsigned int'} [-Wformat=]
  cnft2.h:354:24: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'int' [-Wformat=]
  cnft2.h:354:39: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'int' [-Wformat=]
  cnft2.h:363:25: 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/nftbart.Rcheck/00install.out' for details.
* used C compiler: 'gcc.exe (GCC) 12.3.0'
* used C++ compiler: 'g++.exe (GCC) 12.3.0'