On Tue, Sep 13, 2016 at 10:48:42PM -0500, Bob Friesenhahn wrote: > It may be necessary to prove where the problem is occuring by manually > overwriting updated files in the magick directory with those from the > previous working version until the problem goes away (assuming that it > does).
I've bisected it to https://sourceforge.net/p/graphicsmagick/code/ci/4ee2a87a67e064f3a094ee30b40a7a9bba1eb727/ Use clock_gettime() to obtain elapsed time. Further observations: - it also happens with GCC 5 - it goes away if ElapsedTime() or StartTimer() in magick/timer.c are optimized with -O0 (bisected with GCC #pragmas) - it also goes away if LockSemaphoreInfo() in magick/semaphore.c is optimized with -O0, which seems weird - it also goes away if I modify ElapsedTime() in magick/timer.c to print out the return value before returning it I haven't found the exact optimization that's triggering it yet, and I haven't looked at the code GCC generates. -- Niko Tyni nt...@debian.org
