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The 64-bit Windows binary is built in our second batch because it is
built on the same host as the 32-bit Windows binary.  When the
documentation generation was first added, it was not included in the
second batch because at the time that batch only included the Cygwin
binary.  Therefore the 64-bit Windows binary has been missing the
documentation since it was first created for CMake 3.6.

Since then the Cygwin binary was dropped so the second batch only
contains the 64-bit Windows binary.  Add the docs to it.

Closes: #16333

The test fails spuriously too often.  Additional work on the test
will be needed to make it more reliable.  For now just skip the
test when building nightly binaries so they can complete.

The toolchains we use to build on these platforms support it.

Cygwin has packaged CMake independently of upstream for a long time.
See its [cygport](https://github.com/cygwinports/cmake).

The Linux distro we've been using for this is so old that it limits our
ability to import newer third-party software.  Until a new machine can
be configured to provide this binary we can simply drop it.  Users will
still be able to build from source or use a distro-provided version.

Compile as C++11 since Qt 5.7 requires it.  Limit use of glibc
to 2.6 APIs and lower.

We already compile with `-stdlib=libc++` as required for Qt 5.6.
We can compile as C++11 and still deploy to OS X 10.7.

Download http://www.gnu.org/licenses/lgpl.txt and place it as
Licenses/LGPLv3.txt in our source tree.  When building cmake-gui, use
option CMake_GUI_DISTRIBUTE_WITH_Qt_LGPL to enable notification in the
"About" dialog of how the distribution of Qt is licensed.  Install the
license file as ${CMAKE_ROOT}/Licenses/LGPLv3.txt so that the dialog can
display a path to it.

Kitware Robot authored May 16, 2016 and Brad King committed May 16, 2016

Run the `Utilities/Scripts/clang-format.bash` script to update
all our C++ code to a new style defined by `.clang-format`.
Use `clang-format` version 3.8.

* If you reached this commit for a line in `git blame`, re-run the blame
  operation starting at the parent of this commit to see older history
  for the content.

* See the parent commit for instructions to rebase a change across this
  style transition commit.

Use a new build machine to produce the OS X binary targeting OS X 10.7
and using Qt 5.6.

Update the prebuilt binary build configurations for machines where
we build our own OpenSSL library to use a newer version.

LibArchive now defines this explicitly if it is not defined already.
Since we define _WIN32_WINNT explicitly, we must now define a consistent
value of NTDDI_VERSION explicitly too.

In `detect_nsis_overwrite.cpp` we include windows.h first, and we must
preserve that.  Place the include in an isolated block so that tools
that sort includes do not move it.

This test fails spuriously too often and prevents the nightly binary
from finishing.  Simply skip it for the nightly binary to allow it
to complete more regularly.

This test fails spuriously too often and prevents the nightly binary
from finishing.  Simply skip it for the nightly binary to allow it
to complete more regularly.

Compile with `-D_WIN32_WINNT=0x502` to use a WinXP-compatible API.
Compile with `-D_USING_V110_SDK71_` to tell the VS standard library
headers that we are building with a WinXP-compatible Windows SDK.  Link
executables with `-subsystem:console,5.02` to make them runnable on
Windows XP 64-bit.  Ideally `cmake-gui` should instead be linked with
`-subsystem:windows,5.02` but with the Ninja and Makefile generators
CMake adds `-subsystem:windows` after our `-subsystem:console,5.02` flag
and the linker seems to interpret this combination as we need.

The machine name we happen to use for the build is less informative than
its platform.

Use a new build machine to produce the OS X binary targeting OS X 10.7
and using Qt 5.5.

Update the prebuilt binary build configurations for machines where
we build our own OpenSSL library to use a newer version.

Nils Gladitz authored Feb 07, 2016 and Brad King committed Feb 09, 2016

Use a custom action to look for Uninstall.exe in the user
selected installation prefix.

Its presence indicates a previous NSIS installation.
Inform the user and request manual resolution of the issue.

Compile with `-D_WIN32_WINNT=0x501` to use a WinXP-compatible API.
Compile with `-D_USING_V110_SDK71_` to tell the VS standard library
headers that we are building with a WinXP-compatible Windows SDK.  Link
executables with `-subsystem:console,5.01` to make them runnable on
Windows XP.  Ideally `cmake-gui` should instead be linked with
`-subsystem:windows,5.01` but with the Ninja and Makefile generators
CMake adds `-subsystem:windows` after our `-subsystem:console,5.01` flag
and the linker seems to interpret this combination as we need.

Use a new build machine to produce the Windows binary using the CPack
WiX generator to produce a `.msi` installer.

Users with OS X 10.5 or below can build from source or use an older
CMake version.

The latter is now the preferred URL for visiting cmake.org with a
browser.  Convert using the shell code:

 git ls-files -z | xargs -0 sed -i 's|http://www\.cmake|https://cmake|g'

Our upstream-built release tarballs already contain many unversioned
paths and so will never overlap with another version of CMake in the
same installation prefix.  Therefore we do not need a versioned name for
the documentation directory.  Configure our release binaries to place
the documentation in an unversioned directory so that one can use the
same path to refer to the documentation locally even after updating
CMake.  For example, on OS X one may see the documentation in
`/Applications/CMake.app/Contents/doc/cmake/html/index.html`.

Pass needed bootstrap arguments directly instead of constructing them
from various conditions.

Disable the CMake_INSTALL_DEPENDENCIES option by default and turn it on
explicitly in our packaging scripts.  This simplifies packaging in
distributions that provide the dependencies for us without having to
install them.  We only need 3rd-party runtime dependencies to be
installed for packaging with redistributable binaries.

We no longer produce binaries for AIX.

Update the prebuilt binary build configurations for machines where
we build our own OpenSSL library to use a newer version.