[arch-dev-public] [toolchain] gcc 4.5 breakage

I noticed problem with gcc 4.5 and the GAP system (http://www.gap-system.org) first: It throws a few aliasing warnings, and the program breaks. When I used -fno-strict-aliasing, the warnings disappeared, but the breakage remained, unless I used -O0. Fixing the aliasing problems also fixed the breakage. Now I noticed the exact same issue with busybox: - Building with -Os throws lots of aliasing warnings, busybox's sed breaks - Building with -Os -fno-strict-aliasing builds without warnings, but it still breaks. - Building with -O0 works, but it isn't optimal. This will affect LOTS of other programs and these errors will not show up as errors or warnings during the build procedure.