cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations math/atan2l.c -o math/atan2l -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
math/atan2l.c:5:48: error: ‘atan2l’ undeclared here (not in a function); did you mean ‘atan2f’?
    5 | long double (*foo)(long double, long double) = atan2l;
      |                                                ^~~~~~
      |                                                atan2f