cc -pipe -O   -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations spawn/POSIX_SPAWN_SETSID.c -o spawn/POSIX_SPAWN_SETSID -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lrt -lcrypt
spawn/POSIX_SPAWN_SETSID.c:3:17: error: 'POSIX_SPAWN_SETSID' undeclared here (not in a function); did you mean 'POSIX_SPAWN_SETSIGDEF'?
 int const foo = POSIX_SPAWN_SETSID;
                 ^~~~~~~~~~~~~~~~~~
                 POSIX_SPAWN_SETSIGDEF