* john smith: > We use the same cross-compiler on two Linux machines: machine A and > machine B. It produces some warnings on machine A but not on machine > B when used to compile the same file and with the same set of options > (specifically we use -Wall and -Wextra). We are absolutely sure that > it's the same compiler - it's in the same version and has the same > md5sum on both machines. However, these 2 Linux machines differ - A > is x32 Ubuntu, B is x64 bit Slackware. It's unlikely that the two compiler versions are the same. In the past, Debian has backported some new upstream warnings to an older version, and Slackware probably won't have these backports. In addition, some warnings are issued from the optimizers, and they can be very target-specific in practice. I saw this with -Woverflow warnings in particular because fold uses different heuristics on IBM targets compared to the rest.
