cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration time/strftime_l.c -o time/strftime_l -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
relibc getrlimit(3, 0x7ffffffffc80): not implemented
relibc getrlimit(3, 0x7ffffffffba0): not implemented
relibc getrlimit(9, 0x7ffffffffb60): not implemented
relibc getrlimit(9, 0x7ffffffffb90): not implemented
relibc getrlimit(5, 0x7ffffffffb90): not implemented
relibc getrlimit(9, 0x7ffffffffb60): not implemented
time/strftime_l.c: In function 'main':
time/strftime_l.c:10:9: error: unknown type name 'locale_t'
   10 |         locale_t loc = newlocale(LC_ALL_MASK, "C", (locale_t) 0);
      |         ^~~~~~~~
time/strftime_l.c:10:24: error: implicit declaration of function 'newlocale'; did you mean 'setlocale'? [-Werror=implicit-function-declaration]
   10 |         locale_t loc = newlocale(LC_ALL_MASK, "C", (locale_t) 0);
      |                        ^~~~~~~~~
      |                        setlocale
time/strftime_l.c:10:34: error: 'LC_ALL_MASK' undeclared (first use in this function)
   10 |         locale_t loc = newlocale(LC_ALL_MASK, "C", (locale_t) 0);
      |                                  ^~~~~~~~~~~
time/strftime_l.c:10:34: note: each undeclared identifier is reported only once for each function it appears in
time/strftime_l.c:10:53: error: 'locale_t' undeclared (first use in this function); did you mean 'localtime_r'?
   10 |         locale_t loc = newlocale(LC_ALL_MASK, "C", (locale_t) 0);
      |                                                     ^~~~~~~~
      |                                                     localtime_r
time/strftime_l.c:10:62: error: expected ')' before numeric constant
   10 |         locale_t loc = newlocale(LC_ALL_MASK, "C", (locale_t) 0);
      |                                 ~                            ^~
      |                                                              )
time/strftime_l.c:11:31: error: expected ')' before numeric constant
   11 |         if ( loc == (locale_t) 0 )
      |            ~                  ^~
      |                               )
time/strftime_l.c:24:25: error: implicit declaration of function 'strftime_l'; did you mean 'strftime'? [-Werror=implicit-function-declaration]
   24 |         size_t length = strftime_l(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", &tm, loc);
      |                         ^~~~~~~~~~
      |                         strftime
cc1: some warnings being treated as errors