cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations math/nexttowardl.c -o math/nexttowardl -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
math/nexttowardl.c:5:48: error: ‘nexttowardl’ undeclared here (not in a function); did you mean ‘nexttoward’?
    5 | long double (*foo)(long double, long double) = nexttowardl;
      |                                                ^~~~~~~~~~~
      |                                                nexttoward