Johannes Ziegler <ziegler(a)pm.informatik.uni-ulm.de&gt; writes: Thanks for all the info! I am hoping somebody on xemacs-beta might know better. Therefore I am citing more than usual in case they missed the original. Is libgcc.a identical on barrios,bella,macallan and honegger? What happens if you do the complete compile (and dump) on a glibc 2.1 machine? jura, glenlivet, balblair and scapa I understand. glibc 2.1 binaries will not work on an glibc 2.0 system macallan is the wierd one! At least _something_ predictable happened. :-( This is the wierdest part: it should have worked on all machines. I would have expected it to work on scapa.... One would have expected at least scapa to be interchangable :-( .... Well.. The unexec code _was_ changed between 21.1.4 and 21.1.6, so it must be it. Could you try copying the 21.1.4 version of unexelf.c to 21.1.7 and try (some of the combinations) again? However looking at the path I cannot see what the problem is... On the other hand with dumping any change can give mysterious results. The only real code that should matter of ix86-linux is the .sbbs dumping code which _should_ be in active.. Could you use objdump --headers to see if anything changes between a build with .7 and the .4 unexec? Jan