[PATCH] [RFC] Compiler-RT on ARM via CMake

[Renato Golin]

  Update:

  I've changed a few bits:

  1. Added "arm" to all *san in compiler-rt
  2. Removed the lit.config restrictions on ARM after Alexey's commit
  3. Added a hack check on Clang to look for "arm" instead of getArchName()

  With all that, make check-all fails only three tests in Asan:

      AddressSanitizer-Unit :: Asan-arm-Noinst-Test/AddressSanitizer.ThreadedMallocStressTest
      AddressSanitizer-Unit :: Asan-arm-Noinst-Test/AddressSanitizer.ThreadedOneSizeMallocStressTest
      AddressSanitizer-Unit :: Asan-arm-Noinst-Test/AddressSanitizer.ThreadedQuarantineTest

  All with the same error message:

      AddressSanitizer: detect_leaks is not supported on this platform.

  Investigating the source, it seems that leak detection is x86_64 only, but I haven't found a way to disable only those three unit-tests, as I don't want to disable them all, since the rest passes. It seems we only need that to get compiler-rt working with CMake for ARM.

http://llvm-reviews.chandlerc.com/D2604