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Make it work for out-of-tree builds without requiring one to specify the location of the xz executable. Add xz --filters-help. Make the output shorter by reducing the number of xz -lvv test files. Show the value of LANGUAGE environment variable. Show the xz.git version using git describe --abbrev=8 instead of =4.
Debug tools ----------- This directory contains a few tiny programs that may be helpful when debugging XZ Utils. These tools are not meant to be installed. Often one needs to edit the source code a little to make the programs do the wanted things. If you don't know how these programs could help you, it is likely that they really are useless to you. These aren't intended to be used as example programs. They take some shortcuts here and there, which correct programs should not do. Many possible errors (especially I/O errors) are ignored. Don't report bugs or send patches to fix this kind of bugs.