cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations math/scalbln.c -o math/scalbln -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
math/scalbln.c:5:31: error: ‘scalbln’ undeclared here (not in a function); did you mean ‘scalbnl’?
    5 | double (*foo)(double, long) = scalbln;
      |                               ^~~~~~~
      |                               scalbnl