cc -pipe -O   -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/_CS_POSIX_V8_LP64_OFF64_CFLAGS.c -o unistd/_CS_POSIX_V8_LP64_OFF64_CFLAGS -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lrt -lcrypt
unistd/_CS_POSIX_V8_LP64_OFF64_CFLAGS.c:2:17: error: '_CS_POSIX_V8_LP64_OFF64_CFLAGS' undeclared here (not in a function)
 int const foo = _CS_POSIX_V8_LP64_OFF64_CFLAGS;
                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~