cc -pipe -O   -pthread  -Wall -Wextra -Werror=implicit-function-declaration stdlib/ptsname_r.c -o stdlib/ptsname_r -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm -lpthread -lrt  -lrt -lcrypt
stdlib/ptsname_r.c: In function 'main':
stdlib/ptsname_r.c:24:15: error: implicit declaration of function 'ptsname_r'; did you mean 'ptsname'? [-Werror=implicit-function-declaration]
  int errnum = ptsname_r(controller, name, sizeof(name));
               ^~~~~~~~~
               ptsname
cc1: some warnings being treated as errors