Hi Joachim, Have the severe compiler bugs regarding integer type operations that were reported about Tandem/NSK in 2006 [1][2] been fixed by now? Can you please try the test program from [1], compile it with -D__CHAR_UNSIGNED__ and -O, and post its output?
Bruno [1] http://lists.gnu.org/archive/html/bug-gnulib/2006-10/msg00135.html [2] http://lists.gnu.org/archive/html/bug-gnulib/2006-10/msg00142.html