This will make GTK_HOST defined more like what it is on Meson builds, so that
we set the host string appropriately according to the build that is being
carried out, instead of defaulting to i686-pc-vsXX for all builds.
Like the previous commit on win32/config-msvc.mak.in, this now sets GTK_HOST
to be:
i686-pc-vsXX for 32-bit x86 builds
x86_64-pc-vsXX for x64 builds
aarch64-pc-vsXX for ARM64 builds (requires VS2017 15.9.x or later)
It turns out that we must put Directory.Build.props in win32/vs10 and let
automake copy it over to win32/vs15/... so do that, and only dist the copy
in win32/vs15.
Update the NMake Makefiles used for generating the various sources be able to
cope with an ARM64 build environment, and update the project files, in
particular for Visual Studio 2017 (VisualStudioVersion 15.0) so that we can
pull in the system .lib's that were somehow excluded from the default list
on ARM64 builds.
Also, add a custom Directory.Build.props in win32/vs15 so that we do not
try to build with the Windows 8.1 SDK by defualt, which is not ready for ARM64
builds, but instead uses the appropriate Windows 10 SDK that supports this.
Update the README.win32 file to give people instructions on how ARM64 builds
can be carried out.
Look in the include/harfbuzz directory that is under the pre-defined prefix
directory, as Pango 1.44.x and later pulled in HarfBuzz headers for all builds
This way, we can enable the built binaries to print out diagnostic
messages as needed by the values we set via the envvar GDK_DEBUG.
The release configs of the Visual Studio project files follow the
settings of Meson's `debugoptimized` build settings.
