[cmake] Use separate FetchSource's per adapter #831
Merged
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While attempting to enable the Level-Zero and OpenCL adapters at the same time git will report an error due to the OpenCL tag not existing in the intel/llvm clone use for the Level-Zero adapter. Furthermore, if I wanted to test separate bug fixes for the CUDA and HIP adapters from different sources, this would also not be possible.
This patch uses a separate FetchSource for each adapter to allow each adapters source to be fetched independently of the others and moves those clones into the build directory. This does result in additional git clones when enabling multiple adapters and again in multiple build directories but avoids conflicting remote URL's or multiple build configurations trampling on each others checked out tags.