I'm forwarding this message from Andreas Radke; while Andreas is on the time zone mailing list, the message bounced when he tried to send it directly. --ado Datum: Wed, 19 Nov 2008 21:47:05 +0100 Von: Andreas Radke <a.radke@arcor.de> An: tz@lecserver.nci.nih.gov Betreff: optimization -O2 broken? I'm the ArchLinux package maintainer for tzdata. We are using gcc 4.3.2/glibc2.8- We have run into a small problem with compiler optimizations. Using our default CFLAGS="-march=i686 -mtune=generic -O2 -pipe" the zdump binary is built in broken way on i686 architecture. I have to apply -O1 to make zdump work. See our bugreport: http://bugs.archlinux.org/task/11947 I could confirm this when running zdump -v EUROPE/BERLIN it stuck after two printing first two lines. x86_64 architecture doesn't seem to be affected. Any idea why this happens and how to fix it? -Andy