Get the predefined macro for the architecture correct.
cortex-m4: __ARM_ARCH_7EM__
cortex-m3: __ARM_ARCH_7M__
cortex-m0: __ARM_ARCH_6M__
rdar://17420090
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211792 91177308-0d34-0410-b5e6-96231b3b80d8
Previously we had bodged together some hacks mapping MachO embedded
targets (i.e. mainly ARM v6M and v7M) to the "*-*-darwin-eabi" triple.
This is incorrect in both details (they don't run Darwin and they're
not EABI in any real sense).
This commit appropriates the existing "MachO" environment for the
purpose instead.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@199367 91177308-0d34-0410-b5e6-96231b3b80d8