cc -O2 -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations limits/_POSIX_RTSIG_MAX.c -o limits/_POSIX_RTSIG_MAX -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lintl -lcrypt
limits/_POSIX_RTSIG_MAX.c:3:2: error: #error "_POSIX_RTSIG_MAX is not defined"
    3 | #error "_POSIX_RTSIG_MAX is not defined"
      |  ^~~~~