| Issue |
160530
|
| Summary |
Cannot build native clang-tidy-confusable-chars-gen when cross-compiling standalone clang
|
| Labels |
clang,
clang-tidy
|
| Assignees |
|
| Reporter |
rossburton
|
In the situation where you're cross-compiling clang standalone (that is, from inside clang/ against an existing llvm) the build doesn't know that it needs to build `clang-tidy-confusable-chars-gen` _natively_ and instead builds it for the target and then fails when it tried to run the target binary.
I chased that down to `LLVM_USE_HOST_TOOLS` not actually being set outside of the top-level `llvm/CMakeLists.txt`, so a standalone clang build doesn't actually have that set.
If I then manually set that, it fails to find `get_native_tool_path`, which is easily solved by adding `include(CrossCompile)` to the standalone case in `clang/CMakeLists.txt`.
But now it's failing with:
```
ninja: error: 'tools/extra/clang-tidy/misc/CONFIGURE_Clang_NATIVE', needed by '/bin/clang-tidy-confusable-chars-gen', missing and no known rule to make it
```
This I can't seem to figure out. A top-level cross-compile of clang certainly does do the right thing though, so this _should_ be possible to make work.
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