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xz backdoor and autotools insanity - FelipeC
(felipec.wordpress.com)
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Agreed. One flaw of autotools imho is that writes the configure script in sh. The rational was that the target system might not have other stuff installed.
However, it resulted in a machine-generated (very complex) shell script often without any comment. People also modify the generated shell script itself, because it's committed in the project's git repository. This is one reason why the problem explained in this blog got unnoticed.