Public bug reported:

Here's the log:

https://launchpad.net/ubuntu/+source/mongodb/1:3.4.7-1ubuntu3

Upstream bug: https://jira.mongodb.org/browse/SERVER-33395

As far as I can determine, it is not caused by
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84033 since neither -O0 nor
-mno-optimize-swaps work around the problem.

This package builds successfully against Artful, so the cause appears to
be a build dependency update. The newer compiler in Bionic seems like
the most likely candidate.

Changing "vec_extract(vec_vbpermq(_data, bits), 0)" to
"vec_extract(vec_vbpermq(_data, bits), 1)" does work, but it isn't clear
to me what caused this to break, so I'm reluctant to upload such a
change without further information or more investigation.

Disabling the use of the ppc64el optimised path works around the
problem. Presumably this comes with a performance regression, but this
is better than the current FTBFS status.

** Affects: mongodb (Ubuntu)
     Importance: Undecided
     Assignee: Robie Basak (racb)
         Status: In Progress


** Tags: ftbfs

** Changed in: mongodb (Ubuntu)
       Status: Triaged => In Progress

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https://bugs.launchpad.net/bugs/1758116

Title:
  mongodb ppc64el FTBFS on 1:3.4.7-1ubuntu3

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