XZ Utils 5.2.13, 5.4.7, and 5.6.2 packages were created using a Git snapshot of GNU Libtool. The benefit is that there tend to be fixes that aren't in a stable release yet. At the same time there is a higher risk of new bugs. This time there unfortunately was a bug that breaks building of shared libraries on some systems like mips64.
I'm sorry for the hassle. In any case, don't blame Libtool upstream for this. The same patch applies to the three XZ Utils releases: https://github.com/tukaani-project/xz/releases/download/v5.6.2/xz-5213-547-562-libtool.patch https://github.com/tukaani-project/xz/releases/download/v5.6.2/xz-5213-547-562-libtool.patch.sig Libtool upstream fix: https://git.savannah.gnu.org/cgit/libtool.git/commit/?id=9a4a02615c9e7cbcfd690ed31874822a7d6aaea2 Other information: https://lore.kernel.org/distributions/3299713.44csPzL39Z@pinacolada/ https://bugs.gentoo.org/934370 -- Lasse Collin