cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations stdalign/__alignas_is_defined.c -o stdalign/__alignas_is_defined -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lcrypt -latomic
stdalign/__alignas_is_defined.c:3:2: error: #error "__alignas_is_defined is not defined"
    3 | #error "__alignas_is_defined is not defined"
      |  ^~~~~