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The build itself is done via bootstrap so there is no need to test
it again.  We already do this for the macOS binary.

With our last update of libuv, Cygwin is now supported.

Update our CMake build rules to account for upstream changes.

The checks fail even on compilers that support the keywords because
the linkage is broken:

    src.c:...: undefined reference to 'test'

At the actual use sites we use `static inline` instead of just `inline`,
so perform the check this way too to fix the linkage.

Update from 5.6.0.

Update our CMake build rules to account for upstream changes.

Restore settings to match what we had before resolving conflicts in the
latest update.  Use native APIs on Windows and Apple.  Pass CA
bundle/path options.

This is third-party code.

SunPro 5.13 and below do not compile as c99 by default.

Previously we made the `documentation` target depend on the executable
targets.  There is no real reason to do this other than serializing the
documentation build output in terminals.  Move this dependency behind an
undocumented option so that it is not on by default.

Matthew Woehlke authored Mar 28, 2017 and Brad King committed Mar 28, 2017

Set Sphinx `html_theme_options` to give the generated documentation a
brighter and softer look than the default colors.

Backport upstream libarchive commit 2ecf8d1c1e (Try harder to detect
directories in zip archives, 2016-12-23).

Fixes: #16741

The KWSys `.gitattributes` file now defines custom attributes.
Git does not support these in a subdirectory where we are about
to place the content, so comment them out during import.
This also ensures that the `our-c-style` attribute on KWSys
sources does not activate the `format.clang-format` attribute
on the third-party import branch.

Provide a helper function that import scripts can use when the
third-party project defines custom Git attributes in its top-level
`.gitattributes` file.  These must be commented out because Git
does not support custom attributes in a subdirectory where we
where the third-party project is about to be merged.

Update our release scripts to fetch `refs/stage/master/head` from
the `gitlab.kitware.com` repository.  This will allow us to prepare
releases from staged commits before merging them to `master` or
`release`.

Backport upstream libarchive commit 70f497f456 (As per Cryptographic
Requirements, 2017-03-19).  Discard more bytes of the RC4 keystream
to reduce the possibility of non-random bytes.

Update our release scripts to fetch from the gitlab.kitware.com
repository instead of the cmake.org repository.  Revise our
mapping of special branch names to account for the refs that
now store them in the new repository.

We no longer push directly to cmake.org repositories.  Changes now
go through https://gitlab.kitware.com/cmake/cmake for integration.

Teach Sphinx and our own install rules to skip a `Help/dev` directory.
This will give us a place to put developer-only documentation that
should not be included in the user-facing documentation.  Add a
placeholder README.

Orion Poplawski authored Feb 27, 2017 and Brad King committed Feb 27, 2017

When compiling KWIML tests with `-Werror=format-security` we get

    error: -Wformat-security ignored without -Wformat

Therefore we should disable both `format` and `format-security`
together.

This was added upstream but does not make sense in CMake because we
may replace the library with a logical target name that will not
work inside a `try_compile`.

It is not available on VS 2012 and below.  Use our own impl instead.