cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations math/M_LOG2El.c -o math/M_LOG2El -D_POSIX_C_SOURCE=202405L -lm -lpthread -lnetwork -lbsd -latomic
math/M_LOG2El.c:8:26: error: 'M_LOG2El' undeclared here (not in a function); did you mean 'M_LOG2E'?
    8 | long double  const foo = M_LOG2El;
      |                          ^~~~~~~~
      |                          M_LOG2E