..so make them cry and print a warning if __NR_memfd_create is not
defined. This should make syscall() fail with -ENOSYS, thus trigger a
suitable runtime error-path.
# if _MIPS_SIM == _MIPS_SIM_ABI64
# define __NR_memfd_create 5314
# endif
# if _MIPS_SIM == _MIPS_SIM_ABI64
# define __NR_memfd_create 5314
# endif
# define __NR_memfd_create 356
# define __NR_memfd_create 356
+# else
+# warning "__NR_memfd_create unknown for your architecture"
+# define __NR_memfd_create 0xffffffff