OpenMP Enblend fails on Mac OS X 10.7 Lion

Bug #830053 reported by Yuv on 2011-08-20
This bug affects 2 people
Affects Status Importance Assigned to Milestone

Bug Description

Bug 814280 has been extensively discussed and dissected within Hugin. It seems to be a threading issue affecting Enblend on Mac OS X 10.7 Lion. I am not sure if it is an Enblend code bug, but it is definitely of interest to the Enblend project.

Summary of the finding: the OpenMP version of Enblend shipped with Hugin has spurious failures on Mac OS X 10.7 Lion. Using the non-OpenMP version built for Mac OS X 10.4 Tiger is a workaround that fixes the user's problem.

For builders/developers: Possibly something has changed in the OS X scheduler between 10.6 and 10.7 that affects OpenMP. It may be that this is simply a build issue and new Enblend binaries need to be built against OS X 10.7; or it may be an OpenMP bug; or it may be an Enblend bug. Further investigation is necessary. Thank you for your help.

JS (j5) wrote :

I would guess that is the same bug as what I discovered in Mac OS X Lion:

Completely unrelated to Enblend; all OpenMP applications seem to be affected.

Zandr (zandr) wrote :

Blender has the same issue, and appears to have found a fix by compiling with gcc-4.6:

Martin Andersen (msandersen) wrote :

It affects Hugin 2011.4.0 (the most current build which uses enblend 4.0-753b534c819d) on OSX 10.8 as well.

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