[Debian-med-packaging] Bug#798717: opensurgsim: FTBFS: calculations off on some architectures

[Aaron M. Ucko]

Source: opensurgsim
Version: 0.6.0-2
Severity: important
Justification: fails to build from source

Builds of opensurgsim failed on several architectures because some
calculations in the test suite yielded unexpected results.  You can
find the details at
https://buildd.debian.org/status/logs.php?pkg=opensurgsim&ver=0.6.0-2,
but here's a summary:

* In SurgSimCollisionTest (#2),
  TriangleMeshTriangleMeshContactCalculationTests.NonintersectionTest
  failed on arm64, ppc64el, s390x, and ppc64.

* In SurgSimMathTest (#11), GeometryTest.SegmentTriangleIntersection
  failed on arm64, powerpc, ppc64el, s390x, and ppc64, and
  GeometryTest.TrianglePlaneTest additionally failed on arm64 (but not
  any other architectures).

* In SurgSimPhysicsTest (#12),
  Fem3DElementTetrahedronTests.ForceAndMatricesTest failed on arm64,
  ppc64el, and ppc64.

I suspect powerpc would have encountered more of these discrepancies
if so many tests hadn't immediately aborted per #798693.

Could you please take a look?

Thanks!