[PATCH] D24084: [CMake] Cleanup libunwind lookup code.

[Logan Chien via cfe-commits]

logan added a comment.

In https://reviews.llvm.org/D24084#530433, @rengolin wrote:

> That is a horrible dependency... I never hit it because I always test libc++ with libunwind.


I think the best solution is to move/merge `libunwind/include/unwind.h` to/with `clang/lib/Headers/unwind.h`.  And, modify the libc++abi code base, so that libc++abi can accept the `<unwind.h>` bundled with clang or gcc.   However, it takes time to reach that point.


https://reviews.llvm.org/D24084