cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations complex/ccosl.c -o complex/ccosl -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
complex/ccosl.c:5:51: error: ‘ccosl’ undeclared here (not in a function); did you mean ‘ccosh’?
    5 | long double complex (*foo)(long double complex) = ccosl;
      |                                                   ^~~~~
      |                                                   ccosh