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+========================================
+Flang 11.0.0 (In-Progress) Release Notes
+========================================
+
+.. contents::
+   :local:
+   :depth: 2
+
+.. warning::
+
+   These are in-progress notes for the upcoming LLVM 11.0.0 release.
+   Release notes for previous releases can be found on
+   `the Download Page <https://releases.llvm.org/download.html>`_.
+
+Introduction
+============
+
+This document contains the release notes for the Flang Fortran
+frontend, part of the LLVM Compiler Infrastructure, release 11.0.0. Here we
+describe the status of Flang in some detail, including major
+improvements from the previous release and new feature work. For the
+general LLVM release notes, see `the LLVM
+documentation <https://llvm.org/docs/ReleaseNotes.html>`_. All LLVM
+releases may be downloaded from the `LLVM releases web
+site <https://llvm.org/releases/>`_.
+
+Note that if you are reading this file from a Git checkout, this document
+applies to the *next* release, not
+the current one. To see the release notes for a specific release, please
+see the `releases page <https://llvm.org/releases/>`_.
+
+Known Issues
+============
+
+These are issues that couldn't be fixed before the release. See the bug reports for the latest status.
+
+- ...
+
+Introducing Flang
+=================
+
+Flang is LLVM's Fortran front end and is new for the LLVM 11 release.
+
+Flang is still a work in progress for this release and is included for
+experimentation and feedback.
+
+Flang status
+------------
+
+Flang is able to parse a comprehensive subset of the Fortran language
+and check it for correctness. Flang is not yet able to generate LLVM IR for
+the source code and thus is unable to compile a running binary. 
+
+Flang is able to unparse the input source code into a canonical form and emit
+it to allow testing. Flang can also invoke an external Fortran compiler on this
+canonical input.
+
+Flang's parser has comprehensive support for:
+- Fortran 2018
+- OpenMP 4.5
+- OpenACC 3.0
+
+Major missing features
+----------------------
+
+- Flang is not supported on Windows platforms.
+
+Using Flang
+===========
+
+Usage: ``flang hello.f90 -o hello.bin``
+
+Flang will parse the Fortran file ``hello.f90`` then unparse it to a canonical
+Fortran source file. Flang will then invoke an external Fortran compiler to
+compile this source file and link it, placing the resulting executable
+in ``hello.bin``.
+
+To specify the external Fortran compiler, set the ``F18_FC`` environment
+variable to the name of the compiler binary and ensure it is on your ``PATH``.
+The default value for ``F18_FC`` is ``gfortran``.
+
+When invoked with no source input, Flang will wait for input on standard in.
+When invoked in this way, Flang performs the same actions as if called with
+``-fdebug-measure-parse-tree -funparse`` and does not invoke ``F18_FC``.
+
+For a full list of options that Flang supports, run ``flang --help``.
+
+Additional Information
+======================
+
+Flang's documentation is located in the ``flang/docs/`` directory in
+the LLVM monorepo.
+
+If you have any questions or comments about Flang, please feel free to
+contact us via the `mailing
+list <https://lists.llvm.org/mailman/listinfo/flang-dev>`_.