2012.07.30 14:30 "[Tiff] Libtiff 4 wrongly depends on pthreads", by Bob Friesenhahn
Today I noticed that libtiff 4 is wrongly depending on pthreads and the pthread library (if available). I believe that this is due to a defect in libtiff's configure script, and in particular these bits:
which are only needed to support the tiffgt image display program.
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/