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When invoking file(COPY) or file(INSTALL), the flow is:

    Copy File -> Modify Timestamps -> Set Permissions

Now the flow is:

    Copy File -> Set Permissions -> Modify Timestamps

Setting permissions after modifying the timestamps causes the timestamps
to be modified *again*, resulting in the timestamps being set to the
current clock time instead of the timestamp of the source file of the
copy.

Additionally, none of the above 3 operations are performed if the two
file timestamps (source & destination) are the same.

Fixes #17087

dca5df16 Autogen: Process GENERATED files. Add CMP0071.
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1061

131c721f MSVC: Add flags for C++ language standards
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1063

This lets AUTOMOC and AUTOUIC process GENERATED files which
used to be ignored before.
A new policy CMP0071 ensures that the old behavior of ignoring
GENERATED files is enabled when the CMake compatibility version
CMAKE_MINIMUM_REQUIRED is < 3.10.

Closes #16186

cf0ae55d server: Add support for connections that aren't event based
5ddfb6a4 server: Add connection as part of a request
d4f5d35c server: Refactor to make the event loop owned by server object
5acbf08b Tests: Teach Server test to forward exit code from server process
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !552

c4de0a25 Add sha1sum, sha224sum, sha256sum, sha384sum and sha512sum to command mode
c4647d84 Change ComputeFileMD5 to ComputeFileHash
501a4fee Add some unit tests for md5sum
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1021

8eb1cb3f GHS: Correct the regex for the intXXXX directory detection.
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1062

d89e10cd Diagnose object library self-reference
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1053

Visual Studio 2015 Update 3 introduced the notion of language standard
levels to MSVC.  The language standard level is defined in `_MSVC_LANG`
instead of `__cplusplus`.  It also added support for the `-std:c++14`
and `-std:c++latest` flags, although the compiler defaults to its C++14
mode anyway.  Visual Studio 2017 Update 3 will introduce support for the
`-std:c++17` flag.

Fixes: #16482

cfa9a2bd Help: Add a 3.9 release note about the VS GenerateDebugInformation update
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1060

221ffabf TestDriver: Fix -Wconversion warning
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1058

0348383b Xcode: Add "outputPaths" to custom command script build phase
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1054

cef77f06 Allow language extensions without any standard to use a list of options
74e33711 Merge branch 'backport-fix-lang-std-option-list' into fix-lang-std-option-list
fca05461 cmLocalGenerator: Explain standard flag selection logic in comments
218ce158 Features: Fix support for a list of language standard options
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1059

a1b38865 FindLibXml2: Switch to standard module variable names
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1043

The int directory does not only need to contain digits.
E.g. C:\GHS\int409a is a valid Green Hills installation

The code

    add_library(A OBJECT a.c)
    target_sources(A PRIVATE $<TARGET_OBJECTS:A>)

used to crash CMake via infinite recursion while evaluating the
generator expression.  Then the change in commit v3.9.0-rc1~266^2~1
(cmGeneratorTarget: Replace source classifier implementation,
2017-04-07) avoided the infinite recursion because GetKindedSources now
creates a map entry and initializes it once.  If it is called again on
the same target during that initialization, the partially computed
results are returned.  This is still wrong but does not crash.
Detect and diagnose this case instead.

Co-Author: Ben Boeckel <ben.boeckel@kitware.com>
Fixes: #16578

* LIBXML2_INCLUDE_DIR talks about libxml2 itself;
* LIBXML2_INCLUDE_DIRS lists also include directories coming from
  libxml2's dependencies and is what libxml2 users should use;
* LIBXML2_LIBRARY talks about libxml2 itself;
* LIBXML2_LIBRARIES is what libxml2 users should link to.

This commit doesn't break existing users of FindLibXml2.cmake,
but provides the way for correct behaviour in future. In particular,
on OpenBSD LIBXML2_INCLUDE_DIR resolves to /usr/local/include/libxml2,
while libiconv (an libxml2 dependency) puts iconv.h
in /usr/local/include, which is not picked up automatically.

Add a release note corresponding to the environmental regression fixed
by commit v3.9.0-rc6~15^2~1 (VS: Fix GenerateDebugInformation values for
v140 and v141 toolsets, 2017-06-27).

This is needed for Xcode 9's "New Build System", whose release notes
mention "that output must be declared as an explicit output by the
script which generates it" in reference to outputs of custom script
build phases.

Fix the logic added by commit a2112257 (Add infrastructure to use
language extensions without any standard, 2017-06-29) to support a list
of options as has been done since commit v3.9.0-rc1~174^2~2
(CompileFeatures: Let STD compile options be a list, 2016-10-05).

The change in commit v3.9.0-rc1~174^2~2 (CompileFeatures: Let STD
compile options be a list, 2016-10-05) did not change all the places we
add the language standard options.  Expand the list in the other places.

336c4fc6 CMakeDetermineASMCompiler: fix a CMP0054 warning
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1057