/opt/IBM/openxlC/17.1.1/bin/ibm-clang -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/_CS_POSIX_V8_ILP32_OFF32_CFLAGS.c -o unistd/_CS_POSIX_V8_ILP32_OFF32_CFLAGS -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -latomic
unistd/_CS_POSIX_V8_ILP32_OFF32_CFLAGS.c:2:17: error: use of undeclared identifier '_CS_POSIX_V8_ILP32_OFF32_CFLAGS'
int const foo = _CS_POSIX_V8_ILP32_OFF32_CFLAGS;
                ^
1 error generated.