"Simon Wright" a �crit dans le message news: x7vwuvwbjm7.fsf@smaug.pushface.org... > "nicolas" writes: > > > I have problems with Gnat.Traceback.Symbolic on Linux RedHAT 7.2 and > > Gnat 3.14p > > > > the command issued is > > gnatmake -f -funwind-tables -g test_trace.adb -bargs -E > > Not sure why you've said -funwind-tables ? I think I didn't use it with Gnat 3.13p and read somewhere that it is not required. But since Traceback doesn't work with Gnat 3.14 p , I followed what the Gnat user's guide says (without success ...) -E Store tracebacks in exception occurrences when the target supports it. This is the default with the zero cost exception mechanism. This option is currently only supported on Solaris, Linux and Windows ix86. Under Solaris and Linux you need to use explicitly the gcc flag -funwind-tables when compiling every file in your application. See also the packages GNAT.Traceback and GNAT.Traceback.Symbolic. Under Windows there is no specific option to use to enable this feature but you must not use -fomit-frame-pointer gcc option.