"Joseph S. Myers" <[EMAIL PROTECTED]> writes: > On Tue, 13 Mar 2007, Mark Mitchell wrote: > > > The GCC 4.2.0 RC1 build has failed (on x86_64-unknown-linux-gnu) with: > > > > Comparing stages 2 and 3 > > Bootstrap comparison failure! > > ./java/parse.o differs > > ./java/parse-scan.o differs > > > > Has anyone else seen this? > > I'm now looking at this (or at a possibly related bootstrap comparison > failure seen on i686-pc-linux-gnu).
For what it's worth, I bootstrapped on a few different GNU/Linux systems with different kernels and base compilers. I only saw bootstrap comparison failures on one; that one was running Red Hat 9 and had gcc 3.2.2 installed in /usr/bin. On that one, a bootstrap4 worked. So I assumed that that one was due to some miscompilation of stage1. I saw one other similar case recently: an older compiler miscompiled stage1 in a way that introduced a bootstrap comparison failure; unfortunately I don't recall the exact details. Anyhow, the point is: first see if a bootstrap4/compare3 works. If it does, look at your base compiler. Ian
