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9388a1a39a
This flag does not exist in GNU objcopy but has a major use case. Debugging tools support the .build-id directory structure to find debug binaries. There is no easy way to build this structure up however. One way to do it is by using llvm-readelf and some crazy shell magic. This implements the feature directly. It is most often the case that you'll want to strip a file and send the original to the .build-id directory but if you just want to send a file to the .build-id directory you can copy to /dev/null instead. Differential Revision: https://reviews.llvm.org/D54384 llvm-svn: 348174