cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations math/llroundl.c -o math/llroundl -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
math/llroundl.c:5:33: error: ‘llroundl’ undeclared here (not in a function); did you mean ‘llroundf’?
    5 | long long (*foo)(long double) = llroundl;
      |                                 ^~~~~~~~
      |                                 llroundf