Vkd3d is a 3D graphics library built on top of Vulkan. It has an API very similar, but not identical, to Direct3D 12. Wine uses vkd3d libraries for its implementation of Direct3D 12.
Getting the vkd3d source
To grab the source code, just enter the following command:
git clone git://source.winehq.org/git/vkd3d.git/
Enter the following commands:
./autogen.sh ./configure make
See also the README file.
In order to build 32-bit libraries:
../vkd3d/configure --build=i686-pc-linux-gnu "CPPFLAGS=-m32" "LDFLAGS=-m32"
Vkd3d provides VKD3D_DEBUG and VKD3D_SHADER_DEBUG environment variables to control debug log messages. The debug variables can be set to one of the following debug log levels: none, err, fixme, warn, trace.
See the README file for description of all debug environment variables.