On Sat, Jun 11, 2005 at 06:53:14PM +0200, Gerrit P. Haase wrote: >Corinna Vinschen wrote: >>Gerrit, could you please follow up on this? It seems the simplest way is >>to just switch off -funit-at-a-time for the -O2 optimization. This is the >>patch we applied internally, if that's of any help for you: >> >>Index: gcc/opts.c >>=================================================================== >>RCS file: /cvs/cvsfiles/gcc/opts.c,v >>retrieving revision 1.3 >>diff -c -3 -p -r1.3 opts.c >>*** gcc/opts.c 16 Mar 2004 01:43:58 -0000 1.3 >>--- gcc/opts.c 23 Jul 2004 14:03:41 -0000 >>*************** decode_options (unsigned int argc, const >>*** 564,570 **** >> flag_delete_null_pointer_checks = 1; >> flag_reorder_blocks = 1; >> flag_reorder_functions = 1; >>- flag_unit_at_a_time = 1; >> } >> >> if (optimize >= 3) >>--- 564,569 ---- >> >>Otherwise, do you know by any chance, if there exists some fix for that >>problem? The above kludge is almost a year old, so there's a chance >>that somebody already found the fix. > >Where we had a problem was with -fschedule-insns2 >(flag_schedule_insns_after_reload): > >On Aug 18 15:27:41, Corinna wrote: >> Ich habe jetzt getestet und herausgefunden, dass durch simples >> Abschalten der -fschedule-insns2 alles so funktioniert wie es soll. >> Das gilt sowohl fuer cygserver, als auch fuer OpenSSH-3.9p1. > >I remember that I applied some patch for this, I think I missed it >this time. However, I hope this is fixed with gcc-3.4.x. > >Regarding unit-at-a-time I cannot remember right now if there was >discussion, there are known issues with this option, anyway I will >apply your kludge since I have not much time, I'm on a business trip >the next two weeks.
I did a little more debugging on this and it seems like, in this case at least, the problem is that the newlib code is wrong. Compiling it with -Wstrict-aliasing revealed a problem. Correcting the strict aliasing problem seems to make rsync work better. There are also two other strict error warnings in newlib which I'll fix. cgf -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
