Bug#701138: clang-3.2: fatal error: error in backend: Cannot select: 0x2a4c890: i32 = fabs 0x2a51390

[Ben Longbons]

Also built clang ~exp7 with both gcc 4.7.2-22 and gcc 4.7.2-5, same error.

I'm wondering now if it has anything to do with having important
package from experimental installed (glibc, gcc-4.8-base), though
depending on *exactly* how it was compiled ... I'm going to try a
chroot next.

(Note that when installing clang with gcc 4.7.2.5 on the system, you
have to dpkg --force-depends due to some packages that moved around)