cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations sys_shm/SHMLBA.c -o sys_shm/SHMLBA -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lcrypt -latomic
In file included from /usr/include/i386-gnu/sys/shm.h:30,
                 from sys_shm/SHMLBA.c:7:
sys_shm/SHMLBA.c:8:17: error: initializer element is not constant
    8 | int const foo = SHMLBA;
      |                 ^~~~~~