In commit 57e48f16f2 (VS: Add Visual Studio 16 2019 generator,
2019-01-09, v3.14.0-rc1~150^2) and commit 0fd742a6ff (VS: Teach VS 2019
generator to select host tools matching host arch, 2019-01-28,
v3.14.0-rc1~63^2) we intended to select the `x64` target architecture
and `x64` host tools by default on x64 host machines. Fix detection
of a x64 host when CMake itself is a 32-bit x86 process.
The KWSys SystemInformation `Is64Bits` member is not set correctly,
which led to this bug. Pending investigation on the KWSys side,
simply test ourselves via `IsWow64Process`.
Revert commit da402a081b (VS: Use MSBuild matching toolset host
architecture, 2019-01-28, v3.14.0-rc1~50^2). Multiple people have
reported that the 64-bit `amd64/msbuild` tool fails in cases that the
32-bit `msbuild` works. Drop our change pending further investigation
and hopefully a fix to VS.
Fixes: #18904, #19037
Issue: #18219
VS 2019 does not default to the 8.1 SDK as VS 2017 and VS 2015 did.
When `CMAKE_SYSTEM_VERSION` is 8.1 or lower, select the 8.1 SDK
explicitly.
Fixes: #18927
The check added by commit 0a29a31161 (VS2017: Verify Windows 8.1 SDK
before using it, 2017-04-25, v3.8.1~2^2) used the wrong path to
`windows.h` within the SDK, leading to it never being detected.
Fixes: #18923
VS 2017 and VS 2019 provide `amd64/MSBuild.exe` variants next to
their `MSBuild.exe` tools. When the 64-bit host toolchain is
selected (e.g. via `host=x64`), select the 64-bit MSBuild too.
Fixes: #18219
Add a `cmGlobalGeneratorFactory::GetKnownPlatforms` method to return
a list of known possible values for `CMAKE_GENERATOR_PLATFORM`.
Implement the method for each generator by referencing the list of
possible values documented in `Help/generator/*.rst` for it.
Co-Author: Julien Jomier <julien.jomier@kitware.com>
Replace `cmGlobalGeneratorFactory::GetGenerators` with a pair of methods
to split the list of generator names into those that have platforms in
the name and those that do not.
Add this generator *without* support for specifying the target
architecture in the generator name. cmake-gui will be taught
to provide a field for this, and command-line builds can use -A.
Also, teach this generator to select a default target architecture
based on the host architecture.
Fixes: #18689
Inspired-by: Egor Pugin <egor.pugin@gmail.com>
