I'm doing a bootstrap with on Debian squeeze with --enable-stage1-checking=all and --enable-checking=all and in stage 2 I see this sort of thing about an "unsafe" issue :
../../gcc-4.5.2-RC-20101208/gcc/fold-const.c: In function 'fold_checksum_tree': ../../gcc-4.5.2-RC-20101208/gcc/fold-const.c:14267:3: warning: new qualifiers in middle of multi-level non-const cast are unsafe This is probably filed as a bug somewhere but I couldn't find it. -- Dennis