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* image: add image-combined-dbg helper classVictor Kamensky2018-04-071-0/+9
There is IMAGE_GEN_DEBUGFS="1" variable that enables build of additional rootfs-dbg and additional archive that contains complimentary symbols files for a given image. But the issue with this resulting directory and tarball that before use it has to be combined with original image content. It is required since all cross debugging tools like gdb, perf, and systemtap need file system that contains both target executables/libraries and their symbols. Those tools need to find executable/library first and through it debuglink note find corresponding symbols file. image-combined-dbg when added to USER_CLASSES just copies final resulting rootfs back into rootfs-dbg creating combined target and debug symbols rootfs that can be used for debugging directly. (From OE-Core rev: 7ccb077f51c9232de70e5c6f9897fd9986e3be9d) Signed-off-by: Victor Kamensky <kamensky@cisco.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>