cc -pthread   -Wall -Wextra -Werror=implicit-function-declaration libintl/ngettext.c -o libintl/ngettext -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm -lpthread   -liconv
libintl/ngettext.c:3:10: fatal error: 'libintl.h' file not found
    3 | #include <libintl.h>
      |          ^~~~~~~~~~~
1 error generated.