On 11 April 2013, at 14:11, Nilesh Govindrajan wrote: > ...Also it is a gcc/qemu bug that the CPU is detected as pentium m. As > someone posted earlier, gcc 4.4 gives core2. > But actually, even that's wrong. I changed the flag and ended up getting > illegal instruction for many.
This seems to be not so rare. I had a bug (filed upstream, now fixed) with AMD K6-2+ being detected as an Athlon by -march=native. In my case this was easily detectable because -march=native would produce a binary of nano which would crash immediately on launch with an "illegal instruction" error. Setting -march=i586 or -march=k6-2 would compile a nano which works just fine. So I found this easy to test, once I knew what to look for. This turned out to be a one or two line fix in gcc, but I wouldn't have known where to start with the fix. I was very glad of the gcc devs' help, but it took months for them to get around to it. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48743 Stroller
