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I got the following error when trying to compile the latest svn version of opencv:

error: invalid controlling predicate

A quick Google search yielded this gem of a compiler bug: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38650.

The offending loop:

#ifdef _OPENMP
#pragma omp for schedule(static, 1)
#endif /* _OPENMP */
for( i = first; (i < first + count) && next; i++ )

That is all.

UPDATE: Turns out I was using a stale configuration file from svn for this build. It seems like OpenCV has entirely too many build systems. They should ditch autoconf and go with cmake exclusively.

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