On Tue, Apr 17, 2012 at 6:41 PM, Andi Kleen <a...@firstfloor.org> wrote: >> I also have a question regarding AS compatibility. In case one built >> GCC using AS with support of HLE then using this GCC on a machine with >> old AS will cause fail because of usupported prefix. Can we support it > > I don't think that's a supported use case for gcc. > It also doesn't work with .cfi* intrinsics and some other things.
Well, it's hard to speculate here. What I rely upon is the fact that GCC I have on my Fedora is from gcc-4.6.0-10.fc15.x86_64.rpm and the latter contains no AS within. There should be dependencies so that AS will be updated alongside with GCC? Otherwise upon update to new GCC I can see fails in my project build. >> compile time rather configure time? > > The only way to do that would be to always generate .byte, > but the people who read the assembler output would hate you > for it. Totally agree, it's the best way to hurt your karma. :) Although detection of AS capabilities is available at compile time and can be used to evade compfail - at least in case assembler is involved (no -S provided) Sergos
