x86_64-managarm-gcc -pthread  -Wall -Wextra -Werror=implicit-function-declaration uchar/c16rtomb.c -o uchar/c16rtomb -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
uchar/c16rtomb.c: In function ‘main’:
uchar/c16rtomb.c:16:25: error: implicit declaration of function ‘c16rtomb’; did you mean ‘c32rtomb’? [-Wimplicit-function-declaration]
   16 |         size_t amount = c16rtomb(buf, u'X', &ps);
      |                         ^~~~~~~~
      |                         c32rtomb