This patch adds some hdrgen yaml for ioctl(). Otherwise the function never actually ends up being available in a full build. This is the last thing that is needed to enable turning on LIBCXX_ENABLE_RANDOM_DEVICE.
LLVM libc ========= This directory and its subdirectories contain source code for llvm-libc, a retargetable implementation of the C standard library. LLVM is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.