clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations ftw/S_TYPEISTMO.c -o ftw/S_TYPEISTMO -D_POSIX_C_SOURCE=202405L  -lm  -lintl
ftw/S_TYPEISTMO.c:9:2: error: "S_TYPEISTMO is not defined"
#error "S_TYPEISTMO is not defined"
 ^
1 error generated.