gcc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations math/M_1_SQRTPI.c -o math/M_1_SQRTPI -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lxnet -lsocket -latomic
math/M_1_SQRTPI.c:8:21: error: 'M_1_SQRTPI' undeclared here (not in a function); did you mean 'M_2_SQRTPI'?
    8 | double  const foo = M_1_SQRTPI;
      |                     ^~~~~~~~~~
      |                     M_2_SQRTPI