cc -O2 -pipe  -pthread -I/usr/local/include  -Wall -Wextra -Werror=implicit-function-declaration libintl/ngettext_l.c -o libintl/ngettext_l -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm -lpthread -L/usr/local/lib  -lintl
libintl/ngettext_l.c:20:18: error: call to undeclared function 'ngettext_l'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration]
   20 |         char* output0 = ngettext_l(input, input_plural, 0, locale);
      |                         ^
libintl/ngettext_l.c:20:18: note: did you mean 'ngettext'?
/usr/local/include/libintl.h:293:14: note: 'ngettext' declared here
  293 | extern char *ngettext (const char *__msgid1, const char *__msgid2,
      |              ^
libintl/ngettext_l.c:20:8: warning: incompatible integer to pointer conversion initializing 'char *' with an expression of type 'int' [-Wint-conversion]
   20 |         char* output0 = ngettext_l(input, input_plural, 0, locale);
      |               ^         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
libintl/ngettext_l.c:28:8: warning: incompatible integer to pointer conversion initializing 'char *' with an expression of type 'int' [-Wint-conversion]
   28 |         char* output1 = ngettext_l(input, input_plural, 1, locale);
      |               ^         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
libintl/ngettext_l.c:36:8: warning: incompatible integer to pointer conversion initializing 'char *' with an expression of type 'int' [-Wint-conversion]
   36 |         char* output2 = ngettext_l(input, input_plural, 2, locale);
      |               ^         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
libintl/ngettext_l.c:44:8: warning: incompatible integer to pointer conversion initializing 'char *' with an expression of type 'int' [-Wint-conversion]
   44 |         char* output9 = ngettext_l(input, input_plural, 9, locale);
      |               ^         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4 warnings and 1 error generated.