Disallow LOCAL_CXX_STL with LOCAL_SDK_VERSION.

    endif

    endif

else

else

    my_cxx_stl := $(strip $(LOCAL_CXX_STL))

    my_cxx_stl := $(strip $(LOCAL_CXX_STL))

    ifdef LOCAL_SDK_VERSION

        # The NDK has historically used LOCAL_NDK_STL_VARIANT to specify the

        # STL. An Android.mk that specifies both LOCAL_CXX_STL and

        # LOCAL_SDK_VERSION will incorrectly try (and most likely fail) to use

        # the platform STL in an NDK binary. Emit an error to direct the user

        # toward the correct option.

        #

        # Note that we could also accept LOCAL_CXX_STL as an alias for

        # LOCAL_NDK_STL_VARIANT (and in fact soong does use the same name), but

        # the two options use different names for the STLs.

        $(error $(LOCAL_PATH): $(LOCAL_MODULE): Must use LOCAL_NDK_STL_VARIANT rather than LOCAL_CXX_STL for NDK binaries)

    endif

endif

endif

# Yes, this is actually what the clang driver does.

# Yes, this is actually what the clang driver does.