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Currently, we have four packages that need to use the Xtensa overlay: binutils, gcc-initial, gcc-final and gdb. However, they all use three different ways to check for, and use the overlay. Furthermore, two of them define the same variable: XTENSA_CORE_NAME is defined both by binutils and gdb In order to sanitise that, have the Xtensa architecture export the appropriate variables: the name of the core and the path to the overlay tarball. Packages can then check and use those variables. Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>