[v634][CMake] Fix building Clad with builtin_llvm=OFF
#18050
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Right now, I get the following error when building ROOT with
`builtin_llvm=OFF` and `clad=ON`:
```txt
CMake Error at CMakeLists.txt:94 (find_package):
Could not find a package configuration file provided by "LLVM" with any of
the following names:
LLVMConfig.cmake
llvm-config.cmake
Add the installation prefix of "LLVM" to CMAKE_PREFIX_PATH or set
"LLVM_DIR" to a directory containing one of the above files. If "LLVM"
provides a separate development package or SDK, be sure it has been
installed.
CMake Error at /home/rembserj/code/root/root_build/interpreter/cling/tools/plugins/clad/clad-prefix/src/clad-stamp/clad-configure-RelWithDebInfo.cmake:47 (message):
Stopping after outputting logs.
```
This commit suggests to set the `LLVM_DIR` to Clad to the actual
`LLVM_DIR` that is found by `find_package(LLVM)`.
For `builtin_llvm=ON` this should also work, because `LLVM_DIR` is
correctly set in the `interpreter/CMakeLists.txt` file.
guitargeek
merged commit 0ba1b44
into
root-project:v6-34-00-patches
20 of 21 checks passed
veprbl
pushed a commit
to NixOS/nixpkgs
that referenced
this pull request
Mar 30, 2025
Some patches could be avoided thanks to the following upstream patches: * root-project/root#18086 * root-project/root#18050
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Backport of:
builtin_llvm=OFF#18026