These changes allow us to use DXC as as CMake subproject (via
add_subdirectory).
Commit comments from each commit:
===
cmake: allow CMAKE_INSTALL_RPATH to be defined in superproject on APPLE
platforms
As on Linux, allow CMAKE_INSTALL_RPATH to be defined in a CMake
superproject.
===
cmake: Allow LLVM_ENABLE_ASSERTIONS=OFF to disable assertions in Debug
builds
Currently, this flag is only used to enable assertions in non-Debug
builds, but is not respected in Debug builds. That is, if set to false,
Debug builds will still assert. This change fixes that.
Note that by default, LLVM_ENABLE_ASSERTIONS is true in Debug builds, so
unless it's explicitly set to false, this is a no-op for most people.
===
cmake: Allow DIRECTX_HEADERS_INCLUDE_DIR to be defined from superproject
Useful for when DXC is included as a subdirectory. In Dawn/Chrome, we
use our own mirror of DirectX-Headers instead of checking out the repo's
submodules, so we need to override this variable.
37a082651d