Bug ID: 37128
Summary: ClangConfig.cmake is unusable
Component: deb packages
The ClangConfig.cmake file is installed to an incorrect location, which makes
it unusable from CMake.
For 6.0, it is installed in /usr/share/llvm-6.0/cmake/
However, when trying to discover clang using the following CMake command:
FIND_PACKAGE(Clang REQUIRED PATHS "/usr/share/llvm-6.0/cmake/" NO_DEFAULT_PATH)
cmake fails, as the config script assumes a fixed directory structure, and some
of the required files are located in a different directory, under /usr/lib/llvm
This can be fixed by symlinking/copying/moving /usr/share/llvm-6.0/cmake/
directory to /usr/lib/llvm-6.0/lib/cmake/clang.
Even after this, CMake still fails because it can't find some executables.
* First it can't find the clang executable, because it expects to find it
under /usr/lib/llvm-6.0/bin/clang-6.0, so another symlink has to be created
* then it also tries to find the clang-format, clang-tidy and
clang-import-test executables. These are at the correct locations, but only
installed as part of the clang-tidy-6.0, clang-format-6.0, and clang-tools-6.0
packages. Without installing those packages, the cmake finder can't be used.
This part probably isn't a bug, but it isn't mentioned anywhere.
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