Hello, I am using the Triangle library <http://www.cs.cmu.edu/~quake/triangle.html> to generate Delaunay triangulations of a large number of points. When I compile this library using the -ftree-ter optimization option only, the library gives me incorrect results for certain inputs. The -ftree-ter option is enabled by optimization level -O1 or higher, which also cause the library to return incorrect results. Question: Does this indicate that there is a bug in gcc or is it more likely that there's a problem in how the library is written? Unfortunately I am not familiar with the code of Triangle, I just compile it and use it. I tried this with gcc 4.6.3 on Ubuntu and gcc 4.7.0 on Windows (from <http://nuwen.net/mingw.html>), both 32-bit. Szabolcs