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