cc -O2 -pipe -pthread  -Wall -Wextra -Werror=implicit-function-declaration devctl/posix_devctl.c -o devctl/posix_devctl -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm -lpthread -lrt  -lstdthreads -lcrypt
In file included from devctl/posix_devctl.c:4:
/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/posix_devctl.c:8:63: error: use of undeclared identifier 'posix_devctl'
    8 | int (*foo)(int, int, void *restrict, size_t, int *restrict) = posix_devctl;
      |                                                               ^
3 errors generated.