Fix the vcpkg root setting, which was trying to use CMAKE_PROJECT_DIR
before a project is defined by switching back to CMAKE_SOURCE_DIR. Also
check if the user has \vcpkg or c:\vcpkg and use those if found. Use
\vcpkg if ENV{CI} is set, e.g. on Appveyor.
Enable nasm for visual studio builds by using the nuget nasm2 package.
In Architecture.cmake check that the vcpkg arch matches the compiler
arch, and throw a fatal error otherwise.
When using GLOB to find the nuget package directory, use the package
name as the prefix, this is quite necessary when using multiple nuget
packages.
Signed-off-by: Rafael Kitover <rkitover@gmail.com>
49ca52ba03