[llvm-bugs] [Bug 42258] New: clang as external project does not build if build directory is a subdirectory of llvm

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=42258

            Bug ID: 42258
           Summary: clang as external project does not build if build
                    directory is a subdirectory of llvm
           Product: Build scripts
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: cmake
          Assignee: unassignedbugs at nondot.org
          Reporter: slandden at gmail.com
                CC: llvm-bugs at lists.llvm.org

If I put llvm https://github.com/llvm-mirror/llvm/
in ~/git/llvm

and clang https://github.com/llvm-mirror/clang/
in ~/git/clang

and build from ~/git/llvm-build it works (cmake ../llvm ...)

But if I try to build from ~/git/llvm/build (cmake .. ...)
llvm builds, but clang does not:

$ninja clang
ninja: error: unknown target 'clang', did you mean 'clean'?

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