clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations limits/RTSIG_MAX.c -o limits/RTSIG_MAX -D_POSIX_C_SOURCE=202405L  -lm  -lintl
limits/RTSIG_MAX.c:4:2: error: "RTSIG_MAX is not defined"
#error "RTSIG_MAX is not defined"
 ^
1 error generated.