Help: Organize and revise 3.10 release notes

Add section headers similar to the 3.9 release notes and move each
individual bullet into an appropriate section.  Revise a few bullets.

Help/release/3.10.rst

@@ -7,15 +7,146 @@ CMake 3.10 Release Notes
 
 Changes made since CMake 3.9 include the following.
 
+New Features
+============
+
+Platforms
+---------
+
+* The `flang`_ Fortran compiler is now supported, with compiler id ``Flang``.
+
+* A new minimal platform file for ``Midipix`` was added.
+
+* Support for the MSVC ARM64 architecture was added.
+  Visual Studio 2017 Update 4 and above offer an ARM64 toolchain.
+
+* Support for the IAR ARM Compiler was improved.
+
+.. _`flang`: https://github.com/flang-compiler/flang
+
+Generators
+----------
+
+* The :ref:`Makefile Generators` and the :generator:`Ninja` generator learned
+  to add compiler launcher tools like ccache along with the compiler for the
+  ``CUDA`` language (``C`` and ``CXX`` were supported previously).  See the
+  :variable:`CMAKE_<LANG>_COMPILER_LAUNCHER` variable and
+  :prop_tgt:`<LANG>_COMPILER_LAUNCHER` target property for details.
+
+* The :generator:`CodeBlocks` extra generator learned to optionally exclude
+  files from outside the project root directory from the generated project.
+  See the :variable:`CMAKE_CODEBLOCKS_EXCLUDE_EXTERNAL_FILES` variable.
+
+Commands
+--------
+
+* The :command:`cmake_host_system_information` command learned more keys
+  to get information about the processor capabilities and the host OS
+  version.
+
+* The :command:`configure_file` command learned to support indented
+  ``#  cmakedefine`` and ``#  cmakedefine01``. Spaces and/or tabs between
+  the ``#`` character and the ``cmakedefine``/``cmakedefine01`` words
+  are now understood and preserved in the output.
+
+* The :command:`execute_process` command gained a ``RESULTS_VARIABLE``
+  option to collect a list of results from all children in a pipeline
+  of processes when multiple ``COMMAND`` arguments are given.
+
+* The :command:`include_guard` command was introduced to allow guarding
+  CMake scripts from being included more than once. The command supports
+  ``DIRECTORY`` and ``GLOBAL`` options to adjust the corresponding include guard
+  scope. If no options given, include guard is similar to basic variable-based
+  check.
+
+* The :command:`string` command learned a new ``PREPEND`` subcommand.
+
+* The :command:`string(TIMESTAMP)` command now supports ``%A``
+  for full weekday name and ``%B`` for full month name.
+
+Variables
+---------
+
+* A :variable:`CMAKE_DIRECTORY_LABELS` variable was added to specify
+  labels for all tests in a directory.
+
+Properties
+----------
+
 * A :prop_tgt:`<LANG>_CPPCHECK` target property and supporting
   :variable:`CMAKE_<LANG>_CPPCHECK` variable were introduced to tell
   the :ref:`Makefile Generators` and the :generator:`Ninja` generator to
   run ``cppcheck`` with the compiler for ``C`` and ``CXX`` languages.
 
+* A :prop_dir:`LABELS` directory property was added to specify labels
+  for all targets and tests in a directory.
+
+* A :prop_dir:`TEST_INCLUDE_FILES` directory property was added to
+  list any number of files to be included when running tests with
+  :manual:`ctest(1)`.  This generalizes the :prop_dir:`TEST_INCLUDE_FILE`
+  property.
+
+* The :prop_tgt:`VS_DOTNET_REFERENCEPROP_<refname>_TAG_<tagname>`
+  target property was added to support custom XML tags for reference
+  assemblies in C# targets.
+
 * Source file properties :prop_sf:`VS_SHADER_OUTPUT_HEADER_FILE` and
   :prop_sf:`VS_SHADER_VARIABLE_NAME` have been added to specify more
   details of ``.hlsl`` sources with :ref:`Visual Studio Generators`.
 
+Modules
+-------
+
+* The :module:`FindCurses` module gained a ``CURSES_NEED_WIDE`` option
+  to request the wide-character variant.
+
+* The :module:`FindEXPAT` module now provides imported targets.
+
+* The :module:`FindFreetype` module now provides imported targets.
+
+* :module:`FindMPI` gained a number of new features, including:
+
+  * Language-specific components have been added to the module.
+  * Many more MPI environments are now supported.
+  * The environmental support for Fortran has been improved.
+  * A user now has fine-grained control over the MPI selection process,
+    including passing custom parameters to the MPI compiler.
+  * The version of the implemented MPI standard is now being exposed.
+  * MPI-2 C++ bindings can now be detected and also suppressed if so desired.
+  * The available Fortran bindings are now being detected and verified.
+  * Various MPI-3 information can be requested, including the library version
+    and Fortran capabilities of the individual bindings.
+  * Statically linked MPI implementations are supported.
+
+* A :module:`FindOpenACC` module was added to detect compiler support
+  for OpenACC.  Currently only supports PGI, GNU and Cray compilers.
+
+* The :module:`FindOpenGL` module gained support for GLVND on Linux.
+
+* The :module:`FindOpenMP` module gained support for
+  language-specific components.
+
+* A :module:`FindPatch` module was added to find the ``patch``
+  command-line executable.
+
+* The :module:`FindProtobuf` module :command:`protobuf_generate_cpp` command
+  gained a ``DESCRIPTORS`` option to generate descriptor files.
+
+* The :module:`GoogleTest` module gained a new command
+  :command:`gtest_discover_tests` implementing dynamic (build-time) test
+  discovery.  Unlike the source parsing approach, dynamic discovery executes
+  the test (in 'list available tests' mode) at build time to discover tests.
+  This is robust against unusual ways of labeling tests, provides much better
+  support for advanced features such as parameterized tests, and does not
+  require re-running CMake to discover added or removed tests within a test
+  executable.
+
+* The :module:`InstallRequiredSystemLibraries` module gained support
+  for installing Intel compiler runtimes.
+
+Autogen
+-------
+
 * When using :prop_tgt:`AUTOMOC` or :prop_tgt:`AUTOUIC` with a
   multi configuration generator (e.g. :generator:`Xcode`),
   included ``*.moc``,  ``moc_*.cpp`` and ``ui_*.h`` files are generated in
@@ -49,20 +180,33 @@ Changes made since CMake 3.9 include the following.
   :prop_tgt:`AUTOMOC_COMPILER_PREDEFINES` allows to enable or disable the
   generation of the compiler pre definitions file ``moc_predefs.h``.
 
-* Added sha1sum, sha224sum, sha256sum, sha384sum and sha512sum
-  as an equivalent to existing md5sum to cmake command mode.
+CTest
+-----
 
-* The :command:`cmake_host_system_information` command learned more keys
-  to get information about the processor capabilities and the host OS
-  version.
+* A :variable:`CTEST_LABELS_FOR_SUBPROJECTS` CTest module variable and CTest
+  script variable were added to specify a list of labels that should be
+  treated as subprojects by CDash. To use this value in both the CTest module
+  and the ctest command line :ref:`Dashboard Client` mode (e.g. ``ctest -S``)
+  set it in the ``CTestConfig.cmake`` config file.
 
-* A :variable:`CMAKE_CODEBLOCKS_EXCLUDE_EXTERNAL_FILES` variable was added
-  to tell the :generator:`CodeBlocks` extra generator to exclude files
-  from outside the project root directory from the generated project files.
+CPack
+-----
 
 * CPack gained a ``FREEBSD`` generator for FreeBSD ``pkg(8)``, configured
   by the :module:`CPackFreeBSD` module.
 
+* The CPack ``DEB`` generator, configured by the :module:`CPackDeb` module,
+  was enabled on Windows.  While not fully featured (due to the lack of
+  external UNIX tools) this will allow building basic cross-platform Debian
+  packages.
+
+* The :module:`CPackDeb` module learned to set package release version in
+  ``Version`` info property.
+  See the :variable:`CPACK_DEBIAN_PACKAGE_RELEASE` variable.
+
+* The :module:`CPackDeb` module learned more strict package version checking
+  that complies with Debian rules.
+
 * The :module:`CPackIFW` module :command:`cpack_ifw_configure_component` and
   :command:`cpack_ifw_configure_component_group` commands gained a new
   ``REPLACES`` and ``CHECKABLE`` options.
@@ -82,23 +226,21 @@ Changes made since CMake 3.9 include the following.
   See :variable:`CPACK_RPM_PACKAGE_EPOCH` and
   :variable:`CPACK_DEBIAN_PACKAGE_EPOCH` variables.
 
-* The :module:`CPackDeb` module learned to set package release version in
-  `Version` info property.
-  See :variable:`CPACK_DEBIAN_PACKAGE_RELEASE` variable.
+Other
+-----
 
-* The :module:`CPackDeb` module learned more strict package version checking
-  that complies with Debian rules.
+* The :manual:`cmake(1)` ``-E`` mode gained support for ``sha1sum``,
+  ``sha224sum``, ``sha256sum``, ``sha384sum``, and ``sha512sum``.
 
-* The :ref:`Makefile Generators` and the :generator:`Ninja` generator learned
-  to add compiler launcher tools like ccache along with the compiler for the
-  ``CUDA`` language (``C`` and ``CXX`` were supported previously).  See the
-  :variable:`CMAKE_<LANG>_COMPILER_LAUNCHER` variable and
-  :prop_tgt:`<LANG>_COMPILER_LAUNCHER` target property for details.
+* The graphviz output now distinguishes among the different dependency types
+  ``PUBLIC``, ``PRIVATE`` and ``INTERFACE`` and represents them in the output
+  graph as solid, dashed and dotted edges.
 
-* The CPack ``DEB`` generator, configured by the :module:`CPackDeb` module,
-  was enabled on Windows.  While not fully featured (due to the lack of
-  external UNIX tools) this will allow building basic cross-platform Debian
-  packages.
+Deprecated and Removed Features
+===============================
+
+* Support for building CMake itself with C++98 compilers was dropped.
+  CMake is now implemented using C++11.
 
 * Support for building CMake on HP-UX has been dropped pending better
   support for C++11 and a port of libuv.  See `CMake Issue 17137`_.
@@ -106,122 +248,19 @@ Changes made since CMake 3.9 include the following.
 
 .. _`CMake Issue 17137`: https://gitlab.kitware.com/cmake/cmake/issues/17137
 
-* The :command:`execute_process` command gained a ``RESULTS_VARIABLE``
-  option to collect a list of results from all children in a pipeline
-  of processes when multiple ``COMMAND`` arguments are given.
+Other Changes
+=============
+
+* On FreeBSD the C++ compiler named ``c++`` is now the preferred default.
 
 * The :command:`file(GENERATE)` command now interprets relative paths
   given to its ``OUTPUT`` and ``INPUT`` arguments with respect to the
   caller's current binary and source directories, respectively.
   See policy :policy:`CMP0070`.
 
-* The :module:`FindCurses` module gained a ``CURSES_NEED_WIDE`` option
-  to request the wide-character variant.
-
-* The :module:`FindEXPAT` module now provides imported targets.
-
-* The :module:`FindFreetype` module now provides imported targets.
-
-* :module:`FindMPI` gained a number of new features, including:
-
-  * Language-specific components have been added to the module.
-  * Many more MPI environments are now supported.
-  * The environmental support for Fortran has been improved.
-  * A user now has fine-grained control over the MPI selection process,
-    including passing custom parameters to the MPI compiler.
-  * The version of the implemented MPI standard is now being exposed.
-  * MPI-2 C++ bindings can now be detected and also suppressed if so desired.
-  * The available Fortran bindings are now being detected and verified.
-  * Various MPI-3 information can be requested, including the library version
-    and Fortran capabilities of the individual bindings.
-  * Statically linked MPI implementations are supported.
-
-* A :module:`FindOpenACC` module was added to detect compiler support
-  for OpenACC.  Currently only supports PGI, GNU and Cray compilers.
-
-* The :module:`FindOpenGL` module gained support for GLVND on Linux.
-
-* The :module:`FindOpenMP` module gained support for
-  language-specific components.
-
-* A :module:`FindPatch` module was added to find the ``patch``
-  command-line executable.
-
-* The `flang`_ Fortran compiler is now supported, with compiler id ``Flang``.
-
-.. _`flang`: https://github.com/flang-compiler/flang
-
-* On FreeBSD the C++ compiler named ``c++`` is now the preferred default.
-
 * The :command:`get_filename_component` ``PROGRAM`` mode semantics
   have been revised to not tolerate unquoted spaces in the path
   to the program while also accepting arguments.  While technically
   incompatible with the old behavior, it is expected that behavior
   under typical use cases with properly-quoted command-lines has
   not changed.
-
-* The :module:`GoogleTest` module gained a new command
-  :command:`gtest_discover_tests` implementing dynamic (build-time) test
-  discovery.  Unlike the source parsing approach, dynamic discovery executes
-  the test (in 'list available tests' mode) at build time to discover tests.
-  This is robust against unusual ways of labeling tests, provides much better
-  support for advanced features such as parameterized tests, and does not
-  require re-running CMake to discover added or removed tests within a test
-  executable.
-
-* The graphviz output now distinguishes between the different dependency types
-  ``PUBLIC``, ``PRIVATE`` and ``INTERFACE`` and represents them in the output graph
-  as solid, dashed and dotted edges.
-
-* Support for the IAR ARM Compiler was improved.
-
-* The :command:`include_guard` command was introduced to allow guarding
-  CMake scripts from being included more than once. The command supports
-  ``DIRECTORY`` and ``GLOBAL`` options to adjust the corresponding include guard
-  scope. If no options given, include guard is similar to basic variable-based
-  check.
-
-* The :command:`configure_file` command learned to support indented
-  ``#  cmakedefine`` and ``#  cmakedefine01``. Spaces and/or tabs between
-  the ``#`` character and the ``cmakedefine``/``cmakedefine01`` words
-  are now understood and preserved in the output.
-
-* The :module:`InstallRequiredSystemLibraries` gained support for installing
-  Intel compiler runtimes.
-
-* A :variable:`CTEST_LABELS_FOR_SUBPROJECTS` CTest module variable and CTest
-  script variable was added to specify a list of labels that should be treated
-  as subprojects by CDash. To use this value in both the CTest module and the
-  ctest command line `Dashboard Client` mode (e.g. ctest -S) set it in the
-  CTestConfig.cmake config file.
-
-* A :prop_dir:`LABELS` directory property was added to specify labels
-  for all targets and tests in a directory.
-
-* A :variable:`CMAKE_DIRECTORY_LABELS` variable was added to specify
-  labels for all tests in a directory.
-
-* A new minimal platform file for ``Midipix`` was added.
-
-* Support for the MSVC ARM64 architecture was added.
-  Visual Studio 2017 Update 4 and above offer an ARM64 toolchain.
-
-* The :module:`FindProtobuf` module :command:`protobuf_generate_cpp` command
-  gained a ``DESCRIPTORS`` option to generate descriptor files.
-
-* Support for building CMake itself with C++98 compilers was dropped.
-  CMake is now implemented using C++11.
-
-* The :command:`string` command learned a new ``PREPEND`` subcommand.
-
-* A :prop_dir:`TEST_INCLUDE_FILES` directory property was added to
-  list any number of files to be included when running tests with
-  :manual:`ctest(1)`.  This generalizes the :prop_dir:`TEST_INCLUDE_FILE`
-  property.
-
-* The :command:`string(TIMESTAMP)` command now supports ``%A``
-  for full weekday name and ``%B`` for full month name.
-
-* The :prop_tgt:`VS_DOTNET_REFERENCEPROP_<refname>_TAG_<tagname>`
-  target property was added to support custom XML tags for reference
-  assemblies in C# targets.