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prefixed some local variables with _hdf5 and unset them at the end
(still more of these to do)

first check the LOCATION_<CONFIG> propertiy to find the library, then
LOCATION

Select a configuration as the first of the following available:

* MAP_IMPORTED_CONFIG_<CONFIG>
* ${CMAKE_BUILD_TYPE}, RELWITHDEBINFO, RELEASE, DEBUG
* First entry in IMPORTED_CONFIGURATIONS

Fixes: #17039

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

* 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

712af07e CUDA: CMAKE_EXPORT_COMPILE_COMMANDS now works with CUDA and Ninja
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1055

21ee3309 VS: print comment in CSharp target only if it is actually set
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1049

fda50a08 CMakePushCheckState: Fix cmake_push_check_state RESET argument
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1040

Since commit v3.8.0-rc1~51^2~1 (TestDriver: calc NumTests at compile
time, 2017-01-24) we convert an expression that uses `sizeof()` to an
`int` as a compile-time constant.  Some GCC versions warn about this
with `-Wconversion`.  Add a cast to avoid the warning.

This was introduced in commit d8e6cd9e (IAR: Improve support for IAR ARM
Compiler, 2017-06-15) from !991.

Fixes #17062.

Fixes: #17061

4bafa392 Android: Always add standard include directories last
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1052

The logic added in commit v3.6.0-rc1~30^2 (Add a variable to specify
language-wide system include directories, 2016-05-24) to use
`CMAKE_<LANG>_STANDARD_INCLUDE_DIRECTORIES` incorrectly filters them by
`CMAKE_<LANG>_IMPLICIT_INCLUDE_DIRECTORIES`.  Rather than recognizing
this, commit v3.8.0-rc1~60^2 (Android: Pass sysroot include directory
explicitly, 2017-01-20) worked around the problem by incorrectly
removing `/usr/include` from `CMAKE_<LANG>_IMPLICIT_INCLUDE_DIRECTORIES`
so it worked in `CMAKE_<LANG>_STANDARD_INCLUDE_DIRECTORIES`.

By not filtering out `/usr/include` from user-specified include
directories, we allow the code

    include_directories(${CMAKE_SYSROOT}/usr/include)

to place the include directory too early on the command line.

Fix support for standard include directories to not be filtered by
implicit include directories, and do not remove `/usr/include` from the
list of implicit include directories for Android builds.  Add a test
case to verify that an explicit `/usr/include` is ignored in favor
of the standard directory at the end.

Fixes: #17059

80f59ee6 cmGlobalVisualStudio14Generator: notify when the SDK version doesn't match
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !866

When requesting an SDK version which is not suitable (e.g., missing
`windows.h`), CMake will use the next-best SDK version. Output a message
when CMake chooses something different than the requested SDK version.

See #16895.

c281acf8 FindProtobuf: add target for protoc
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !1045