clang -O2   -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/_POSIX_V7_LPBIG_OFFBIG.c -o unistd/_POSIX_V7_LPBIG_OFFBIG -D_POSIX_C_SOURCE=202405L  -lm   -lintl
unistd/_POSIX_V7_LPBIG_OFFBIG.c:5:2: error: "_POSIX_V7_LPBIG_OFFBIG is not defined"
#error "_POSIX_V7_LPBIG_OFFBIG is not defined"
 ^
1 error generated.