Merge "Don't try to build the emulator on Mac OS if the right tools aren't installed."

ifneq ($(findstring llvm-gcc,$(GCC_REALPATH)),)

  # Using LLVM GCC results in a non functional emulator due to it

  # not honouring global register variables

  ifneq ($(strip $(BUILD_EMULATOR)),)

    $(warning ****************************************)

    $(warning * gcc is linked to llvm-gcc which will *)

    $(warning * not create a useable emulator.       *)

    $(warning ****************************************)

  endif

  BUILD_EMULATOR := false

else

  BUILD_EMULATOR := true

endif

# When building on Leopard or above, we need to use the 10.4 SDK

# or the generated binary will not run on Tiger.

darwin_version := $(strip $(shell sw_vers -productVersion))

ifneq ($(filter 10.1 10.2 10.3 10.1.% 10.2.% 10.3.% 10.4 10.4.%,$(darwin_version)),)

    $(error Building the Android emulator requires OS X 10.5 or above)

endif

ifneq ($(filter 10.5 10.5.% 10.6 10.6.%,$(darwin_version)),)

    # We are on Leopard or Snow Leopard

    MSDK=10.5

else

    # We are on Lion or beyond, and 10.6 SDK is the minimum in Xcode 4.x

   MSDK=10.6

endif

MACOSX_SDK := /Developer/SDKs/MacOSX$(MSDK).sdk

ifeq ($(strip $(wildcard $(MACOSX_SDK))),)

  BUILD_EMULATOR := false

endif

endif

$(shell echo 'VERSIONS_CHECKED := $(VERSION_CHECK_SEQUENCE_NUMBER)' \