HiPE: Fix check for when ErLLVM is available #1986
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The previous check whether ErLLVM could be enabled and/or tested simply checked whether a suitable version of the LLVM tool chain was present in the path. Obviously this is not enough: there should also be a check that we are running in an architecture on which the ErLLVM compiler has been ported. Fix the function that provides this functionality and also rename it in order to more appropriately describe what it does. In principle, this change introduces a backwards incompatibility as the function is one of those exported by the `hipe' module, but this function was not documented and the chances that it has been used somewhere else that the test suite are pretty low (if not zero).
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The previous check whether ErLLVM could be enabled and/or tested simply
checked whether a suitable version of the LLVM tool chain was present
in the path. Obviously this is not enough: there should also be a check
that we are running in an architecture on which the ErLLVM compiler
has been ported. Fix the function that provides this functionality and
also rename it in order to more appropriately describe what it does.
In principle, this change introduces a backwards incompatibility as the
function is one of those exported by the `hipe' module, but this
function was not documented and the chances that it has been used
somewhere else that the test suite are pretty low (if not zero).