** Description changed:
MySQL 5.7 source package has liblz4-dev as a build-dep, but it isn't
actually used because the build defaults to using a bundled version.
+ No known user impact at present (other than a small difference in binary
footprint), but builds shouldn't use bundled libraries when it's available in
Add cmake flag -DWITH_LZ4=system to use the correct version.
+ [Test case]
+ * Build package
+ * Run ldd on usr/lib/lz4_decompress and see it doesn't link in liblz4 from
+ [Regression potential]
+ This change has been in Yakkety for some time (5.7.15-0ubuntu2).
+ Database dump-related utils like mysqlpump and lz4_decompress could be
+ impacted if any significant changes arise between the version of liblz4
+ available on user systems and what is used to test upstream.
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Build with lz4 build-dep instead of bundled
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