* gnu/packages/patches/clang-12-tools-extra-directory.patch: New file. * gnu/local.mk (dist_patch_DATA): Adjust accordingly. * gnu/packages/llvm.scm (llvm-12, clang-runtime-12, clang-12, clang-toolchain-12): New variables. (llvm-11): Inherit from LLVM-12.
		
			
				
	
	
		
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Help CMake locate the "tools-extra" directory.
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Taken from <https://bugs.llvm.org/show_bug.cgi?id=49990#c3>.
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diff --git a/clang-tools-extra/clangd/quality/CompletionModel.cmake b/clang-tools-extra/clangd/quality/CompletionModel.cmake
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--- a/clangd/quality/CompletionModel.cmake
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+++ b/clangd/quality/CompletionModel.cmake
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@@ -5,7 +5,7 @@
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 # will define a C++ class called ${cpp_class} - which may be a
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 # namespace-qualified class name.
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 function(gen_decision_forest model filename cpp_class)
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-  set(model_compiler ${CMAKE_SOURCE_DIR}/../clang-tools-extra/clangd/quality/CompletionModelCodegen.py)
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+  set(model_compiler ${CMAKE_CURRENT_LIST_DIR}/quality/CompletionModelCodegen.py)
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   set(output_dir ${CMAKE_CURRENT_BINARY_DIR})
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   set(header_file ${output_dir}/${filename}.h)
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