[llvm-bugs] [Bug 40445] New: -DLLVM_EXTERNAL_LIT=... no longer works, breaking standalone builds

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=40445

            Bug ID: 40445
           Summary: -DLLVM_EXTERNAL_LIT=... no longer works, breaking
                    standalone builds
           Product: Build scripts
           Version: 8.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: cmake
          Assignee: unassignedbugs at nondot.org
          Reporter: mgorny at gentoo.org
                CC: llvm-bugs at lists.llvm.org
            Blocks: 40331

For example, when trying to run libc++ tests, I get:

ninja -v -j32 -l0 check-libcxx
[0/1] cd
/var/tmp/portage/sys-libs/libcxx-8.0.9999/work/libcxx-8.0.9999-abi_x86_64.amd64/test
&& /var/tmp/portage/sys-libs/libcxx-8.0.9999/temp/python2.7/bin/python
/var/tmp/portage/sys-libs/libcxx-8.0.9999/work/libcxx-8.0.9999-abi_x86_64.amd64/bin/llvm-lit
-vv -j 32 --param=cxx_under_test=/usr/lib/llvm/8/bin/x86_64-pc-linux-gnu-clang
/var/tmp/portage/sys-libs/libcxx-8.0.9999/work/libcxx-8.0.9999-abi_x86_64.amd64/test
/usr/bin/python2.7: can't open file
'/var/tmp/portage/sys-libs/libcxx-8.0.9999/work/libcxx-8.0.9999-abi_x86_64.amd64/bin/llvm-lit':
[Errno 2] No such file or directory
FAILED: test/CMakeFiles/check-cxx


It seems that LLVM_EXTERNAL_LIT no longer works.  I need to investigate
further.


Referenced Bugs:

https://bugs.llvm.org/show_bug.cgi?id=40331
[Bug 40331] [meta] 8.0.0 Release Blockers
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