Log Message:
3.9.0:
* The “Visual Studio 14 2015” generator has been taught about a
change to the “v140” toolset made by a VS 2015 update. VS changed
the set of values it understands for the “GenerateDebugInformation”
linker setting that produces the “-DEBUG” linker flag variants.

* “CUDA” is now supported by the Visual Studio Generators for VS
2010 and above. This complements the existing support by the
Makefile Generators and the “Ninja” generator. CUDA 8.0.61 or higher
is recommended due to known bugs in the VS integration by earlier
versions.

* CMake is now aware of the “C++ standards” and “C standards” and
their associated meta-features for the following “compiler ids”:
“Cray”, “PGI”, and “XL”.

* The “add_library()” command “IMPORTED” option learned to \ 
support
Object Libraries.

* All “find_” commands now have a “PACKAGE_ROOT” search path \ 
group
that is first in the search heuristics. If a “find_” command is
called from inside a find module, then the CMake variable and
environment variable named “_ROOT” are used as prefixes
and are the first set of paths to be searched.

* The “install(TARGETS)” command learned a new “OBJECTS” \ 
option to
specify where to install Object Libraries.

* The “install(EXPORT)” command learned how to export Object
Libraries.

* A “BUILD_WITH_INSTALL_NAME_DIR” target property and corresponding
“CMAKE_BUILD_WITH_INSTALL_NAME_DIR” variable were added to control
whether to use the “INSTALL_NAME_DIR” target property value for
binaries in the build tree. This is for macOS “install_name” as
“BUILD_WITH_INSTALL_RPATH” is for “RPATH”.
* A “CUDA_PTX_COMPILATION” target property was added to Object
Libraries to support compiling to “.ptx” files instead of host
object files.

* A new “GoogleTest” module was added to provide the
“gtest_add_tests()” function independently of the “FindGTest”
module. The function was also updated to support keyword arguments,
with functionality expanded to allow a test name prefix and suffix
to be specified, the dependency on the source files to be optional
and the list of discovered test cases to be returned to the caller.

* The “Ninja” generator has loosened the dependencies of object
compilation. Object compilation now depends only on custom targets
and custom commands associated with libraries on which the object’s
target depends and no longer depends on the libraries themselves.
Source files in dependent targets may now compile without waiting
for their targets’ dependencies to link.
* Interprocedural optimization (IPO) is now supported for GNU and
Clang compilers using link time optimization (LTO) flags. See the
“INTERPROCEDURAL_OPTIMIZATION” target property and
“CheckIPOSupported” module.

* The “TARGET_OBJECTS” “generator expression” is now supported by
the “add_custom_command()” and “file(GENERATE)” commands.