gcc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations math/M_EGAMMAl.c -o math/M_EGAMMAl -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lxnet -lsocket -latomic
math/M_EGAMMAl.c:8:26: error: 'M_EGAMMAl' undeclared here (not in a function)
    8 | long double  const foo = M_EGAMMAl;
      |                          ^~~~~~~~~