cc -O2 -pipe -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations devctl/size_t.c -o devctl/size_t -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lstdthreads -lcrypt
In file included from devctl/size_t.c:2:
/usr/include/devctl.h:31:1: error: unknown type name '__BEGIN_DECLS'
   31 | __BEGIN_DECLS
      | ^
/usr/include/devctl.h:46:1: error: unknown type name '__END_DECLS'
   46 | __END_DECLS
      | ^
devctl/size_t.c:3:7: error: expected ';' after top level declarator
    3 | size_t* foo;
      |       ^
      |       ;
3 errors generated.