cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration locale/getlocalename_l.c -o locale/getlocalename_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
locale/getlocalename_l.c: In function 'main':
locale/getlocalename_l.c:9:28: error: implicit declaration of function 'getlocalename_l' [-Werror=implicit-function-declaration]
    9 |         const char* name = getlocalename_l(LC_COLLATE, LC_GLOBAL_LOCALE);
      |                            ^~~~~~~~~~~~~~~
locale/getlocalename_l.c:9:56: error: 'LC_GLOBAL_LOCALE' undeclared (first use in this function)
    9 |         const char* name = getlocalename_l(LC_COLLATE, LC_GLOBAL_LOCALE);
      |                                                        ^~~~~~~~~~~~~~~~
locale/getlocalename_l.c:9:56: note: each undeclared identifier is reported only once for each function it appears in
locale/getlocalename_l.c:14:9: error: unknown type name 'locale_t'
   14 |         locale_t locale = newlocale(LC_COLLATE_MASK, "C", (locale_t) 0);
      |         ^~~~~~~~
locale/getlocalename_l.c:14:27: error: implicit declaration of function 'newlocale'; did you mean 'setlocale'? [-Werror=implicit-function-declaration]
   14 |         locale_t locale = newlocale(LC_COLLATE_MASK, "C", (locale_t) 0);
      |                           ^~~~~~~~~
      |                           setlocale
locale/getlocalename_l.c:14:37: error: 'LC_COLLATE_MASK' undeclared (first use in this function); did you mean 'LC_COLLATE'?
   14 |         locale_t locale = newlocale(LC_COLLATE_MASK, "C", (locale_t) 0);
      |                                     ^~~~~~~~~~~~~~~
      |                                     LC_COLLATE
locale/getlocalename_l.c:14:60: error: 'locale_t' undeclared (first use in this function); did you mean 'locale'?
   14 |         locale_t locale = newlocale(LC_COLLATE_MASK, "C", (locale_t) 0);
      |                                                            ^~~~~~~~
      |                                                            locale
locale/getlocalename_l.c:14:69: error: expected ')' before numeric constant
   14 |         locale_t locale = newlocale(LC_COLLATE_MASK, "C", (locale_t) 0);
      |                                    ~                                ^~
      |                                                                     )
locale/getlocalename_l.c:15:34: error: expected ')' before numeric constant
   15 |         if ( locale == (locale_t) 0 )
      |            ~                     ^~
      |                                  )
locale/getlocalename_l.c:17:14: warning: assignment to 'const char *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
   17 |         name = getlocalename_l(LC_COLLATE, locale);
      |              ^
cc1: some warnings being treated as errors