For me, clang is the primary compiler since a few months (it is SOO
much faster; I only use g++ when I want to compile with openmp), I
consider it a supported compiled. Therefore I would like you to
install clang (lucid package in yade-external) and fix your test; I
would do it, but honestly I don't know what it tests. We can just put
the tolerance up a bit, so that it passes with clang.
Increasing tolerance is not a good idea, since 10e-3 is already high.
Thanks to your numbers, I could see the problem : it was comparing a
residual velocity in a situation close to static equilibrium. In other
words : "is numerical noise the same?". Now we know that numerical noise
is different with different compilers. Lesson learnt.
I disabled this test in last commit, and included more explanations of
what happens in the script:
/"Motion of a "sinusoidal" beam made of cylinders. The test checks the
position and velocity of the free end of the bending beam subjected to
gravitational load. It is similar to
scripts/test/chained-cylinder-spring.py but with less elements.
positions and velocity are compared during the transient oscillations,
only positions are compared for the larger time since residual velocity
is compiler-dependent (see
https://lists.launchpad.net/yade-dev/msg06178.html)."
/
I won't spend time on clang++ now, sorry. I'm strugling with enough
taucs/pardiso/fortran compilation issue with gcc at the moment. With
clang I would be left with no support at all from library developers.
Just curious : did you compile with clang + CGAL feature yet?
p.s. What is pristine, sorry?
Virginal, d'origine... (dict?)
Oh, it was just english! Thanks. :-)
Bruno
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