cc -pthread   -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations math/M_SQRT3.c -o math/M_SQRT3 -D_POSIX_C_SOURCE=202405L -lm -lpthread  -lgdbm_compat -lintl -lnetwork -lbsd -latomic
math/M_SQRT3.c:8:21: error: 'M_SQRT3' undeclared here (not in a function); did you mean 'M_SQRT2'?
    8 | double  const foo = M_SQRT3;
      |                     ^~~~~~~
      |                     M_SQRT2