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In r319620, the host build was changed to use Native for TARGETS_TO_BUILD because passing semicolons through add_custom_command is surprisingly difficult. However, Native really doesn't make any sense here, and it only works because we don't technically do any codegen in the host tools so pretty well anything will "work". The problem here is that passing something other than the correct value is very fragile - as evidence note how the llvm-config in the host tools acts differently than the target one now, and misreports the targets to build. Similarly, if there is any logic conditional on the targets in tablegen (now or in the future), it will do the wrong thing. To fix this, we need to escape the semicolons in the targets string and pass it through to the child cmake invocation. llvm-svn: 320413
See docs/CMake.html for instructions on how to build LLVM with CMake.